Unreal engine 5 chaos destruction to destroy building with explosion and APC vehicle

1. 00 Promo: In this course, we're going to talk about disruption, building destruction or whatever destruction. We start with creating a APC that can go forward, backward, left, right. It can shoot at the stuff and it has handbrake as well. We create that for testing or destruction system. After that, we go to some basic stuff. For example, some sphere, how we can make them destructible. After that, we will talk about how we can change the damage threshold of them. So some of them we can hit them by car, and it will be destroyed. And some of them because the damage threshold of them is a lot, we can't break them easily. And with this damage threshold, it can resist the explosion as well. So some of them will destroy much easier, and some of them will destroy much faster. We will talk about how we can change the strength of these explosions. After that, we will go to anchor fields or we can use them to stack things at top of each other. After we learn all of these basic stuff, we will go and create a building. We're building have some columns, some glasses, some wood, and some concrete that each one of them has different damage threshold. So, for example, if we had at the middle of a building where there is no column, it will be destroyed a little bit, but it won't be collapsed. But if we hit a column, it will collapse. And whatever that is based on that column, it will collapse as well. So if you want to add some destructibility to your game, let's start this course together. 2. 01 Create destruction project: For this project, I'm using ARIA Engine 5.5 0.3, so download it and open it up. In here, you can go to Game and create a game template. I want to use the blank project because it will be easier for beginner to understand it. So click on Blank. We want to do it in blueprint. You don't need the starter content at all. You can tell it where do you want to put it by clicking in here and choose where do you want to put it. After that, we can call it a name. I want to call it destruction, and head Create. And this is our project. Now that our project is opening a description of this video. There is a zip file that is called apc dot zip. Download it, put it on your desktop, and after that, right click on it and head extract or you can just click on it to open it. It will open it in Windows Explorer and you can drag and drop it, so it will be extracted. This APC folder is really important. Inside that there is a Assets folder, and the path should be exactly like this, so it will work, right? Now that the APC folder is extracted. Go to the project. Click on Content drawer and in here, right click on Content folder and show it in Explorer, right? Know in here what you need to do, just drag and drop the APC folder inside this content folder. And that's all you need to do. Now, if you go to content drawer, you can see the APC folder in here, but if you don't click on it, there is nothing in there. If you restart your unreal engine, it will work. But for now, just leave it like this. No next thing that I want to do. I want to create a new level because these open Words, for some reason, is not working with geometry collection and all of that. That's why I will go to file, go to new level, and in here, create a basic level and hit Create, right? This is the level that we want. We can click on this floor in here and make it really big. So click on it, go to detail, and for DX scale, I want to put it on, for example, 500 for the Y, 500 and for the Z, you don't need to change it. That's all you need to do. Head save. I will tell you where do you want to save it? I will save it in Content folder. So click on Content folder, Headsaf and it will be saved. Now, go to Edit Project setting. Now in here, go to maps and modes and change the editor starter map from the open Word to new. Right? There is a Bargain Area engine 5.5 0.3 that when you change this, it will go to non. So again, you should click on it and choose the new map. So again, in here, choose it. I will go to non and after that selected, it will work, right. Now with that done, you can just close it. Next thing that we want to do, we want to go to Edit, Editor preferences and in here, search for open whenever we open something, we want it to be open in the main window. So in the asset editor open location, change the default to main window. No, it will be easier to work with. Next thing that we want to do, we want to go to Edit plugin and in here, search for chaos. Okay? And if you go down, there is a chaos vehicles plugin. Make sure you enable that after that head and restart URL engine. I know or project will be ready so we can create or destruction. And here, the real engine is open, the plugins are enabled. You can go to Content drawer. The new map is here. If you go to APC into Asset, the vehicle you can see in here, we have a vehicle in here, the skeletal image of a vehicle. Why we need this vehicle for the destruction? Because we need something to be able to shoot at the building that we want to destroy. We want it to be destructible. So that's why we want to create this APC. But if you want to just continue with your own game, I will create a projectile for this APC, for this vehicle, so you can use it inside your game as well. It doesn't need to be just the APC. The projectile of this APC is important. So if you want just the destruction part, you can ignore the APC part. 3. 02 APC blueprint: No first thing that we want to do. We want to create a blueprint for our APC. So go to APC, folder in here, right click, create a new folder and call it lueprint. So all of our blueprints will be here. We will be organized, and we can migrate the to another project and use it, right? It will be easier. So know in here, right click, create a blueprint class, and for the type of it, go to all classes and in here, search for Well wheeled vehicle pun and head select. And I want to call it BP APC. You can call it whatever you want. D click on it to open it or head inter to open it. No, we need to decide a mesh. Click on the mesh, and in here, choose a skeletal mesh of our west APC, right? No, let's just look at it. That looks beautiful, right? No next thing for you to be able to see it. I want to click on add and add a spring arm, right. And after that, click on the spring arm and add a camera, right? You don't need to change the name of spring arm and the camera. By itself, it's good, right? The length of or spring arm, I want it to be 700. I want to add some offset to the socket of O Sprinarsvill, in direction of Y, for example, 330 maybe, right, like this. And I want to bring it up a little bit, like 200. No, that I think is good because I want to see the barrel of the gun, right? No, I want to bring it up a little bit because I want it to be at the middle of or APC, just like that. And I think that is better for you to see it. I want to go to Contender or right click in here and create another blueprint class of type of game mode base, and I want to call GM for game mode, BP for blueprint APC, right? So with this game mode, we want to tell it to use this BP APC as your pan as your playable pawn, right? So go to default Pan class in here and change it to BP APC and now you can head compile, save, and close this and go to level and in here, go to word setting and change the game mode override from none to GM BP APC. Now, if you run over game, you can see or APC, but you can see the wheels are not okay. It's not rotating correctly. Nothing is right. Okay? So let's just fix that. If we go to BP APC in here, we have a vehicle movement component. I don't want to use that. What I want to use, I want to click on add and search for chaos. And the one that I want to use is chaos wheeled vehicle movement. Just add this one, and in here, we need to tell it which the bones are your wheels, right? So in chaos wheeled vehicle movement, there are a wheel setup. So we need to set up that. How many wheels we have? One, two, three, six, right? So let's just add six of them. We have six. No, each one of them needs a bone name. So let's just find out the bone names. For doing that, go to Content drawer, go to APC folder, go to Assets, go to vehicles, and in here, open up the skeleton, right? And in here, I want to search for wheel. You can see there is one, two, three, four, five, six of them, right? No, the front ones, I want to use it for steering and the back ones, I want to use it for going forward and backwards. So motor should affect these back ones, right? Now, with that done, let's just find out the front one. This one, RT wheel one joint. Right. Click on it, copy bone name and go to BPAPC. I want to put it for the index zero bone name, Control V to paste it over here. That's finished. Now, let's just go to the next one. I want to find the left one, the front left one. And what is that? It is left wheel or LF wheel one joint. You can see right click copy bone name, go to BPAPC and paste it for the index one bone name, right? That's it. Now, let's just do the index two. How many more we have? We have left field two, left field three, right wheel two, and right wheel three. So we can copy one of these copy bone name, left wheel two. And paste it over here. This is left wheel to joint. We want to do it for index three as well. For the left wheel tree joint this time. You don't need to go there and copy the name because it has just a number difference, right? After that, right wheel to joint, right click copy bone name. And know in here we go to index four, paste it over here, and for the index five, we know that we should increment the number to three. That's it. Now, all the wheels are set up. No, just with that, with those set up, we can head safe, compile, go to our level, and run over game. Now, you can see the wheels are okay and it's working fine. But it's a little bit in the ground. We will fix that. But as you can see, the wheels are not rotating weirdly. That's a good step toward the goal. 4. 03 Wheel class: Next thing that you want to do, you want to fix the wheels. Right now, if you run a game, you can see the wheels are inside the ground because the radius of them is not okay. So for fixing that, we should go to content drawer, go to a PC folder, go to Blueprint folder. And here, right, create a blueprint class. We need to create a blueprint class for the wheels. So in here, search for wheel and choose chaos, vehicle wheel and head select because it chaos vehicle wheel, I will call it CWE. After that, I want to call it front wheel. Okay? And don't click on it to open it in here. I want to change the radius to something like 50, right? I want to tell it to be affected by handbrake. Don't be affected with the engine, but it should be affected with steering. And the amount of steering for this vehicle, I don't want it to be more than 30 degree. In future, you need to change that because if you increase that a lot, it won't look natural. The wheels will go through the body. That's why. So just with that, let's just go to BPAPC, click on Caos wheeled vehicle movement. And for the front wheels, these two first one, right, right wheel one joint and left wheel one joint, we want to change the wheel class to the CWV front wheel, right? For both of them, we want to change it to CWV front wheel. Just with that, if you have compiled save and Runo no, you can see the front wheel is not in the ground, so it working fine. No, we need to do the same for the rear wheel, right? So we can click on this one, control the duplicate it, and rename it to rear wheel, not front wheel, right? So change the name. To rear wheel. The click on it to open it. The radius 50 is good. We want it to be affected by handbrake as well. We want it to be affected by engine, as well. So with the engine, it will rotate. And I want it to be ABS enabled. And after that, the affected by steering, I wanted to make it off because we don't want it to be steerable or rotate right and left, right? That's it. Head compile, save maybe in future, we'll change these values, but for now, it is okay. Make sure you go to file, save everything. Now go to BP APC. We can just click on the rear wheel class in here and after that, go for the other indexes for the rear wheels and click on this arrow to set the rear wheel class there. Click on this arrow for all of them like this. Now if you had compiled save and Runo game, you can see, all the wheels are okay and it's working fine. Now, next thing, with the most, we need to be able to rotate around APC. Let's see how we can do that in next video. 5. 04 Look around APC with mouse: No for us to be able to look around over APC with the most, we need input. So for doing that, I want to go to Content drawer, go to APC folder, right click in here and create a new folder and I want to call it inputs. So all of our inputs will be here. First thing that you want to add in here, we want to go to input, create input mapping context, and I want to call it IMC, APC, right. Input mapping context for APC. After that, right click, go to input and create input action, and I want to call it IA L around or whatever you want to call it. Doll click on it to open it. The value type, I want to change it to axis two D or Vctor two D because the most has X and Y. So we want to pass the X and Y over most. Make sure you head safe. No, we want to map it inside or IMC APC, so doll click on IMC APC, add a new mapping. And in here, we want to map the I look around. And if you expand it, the thing that we want to map it to, if you click in here, we want to map it to most Y to the axis. That's all we need to do in here. And after that, go to BPAPC, go to event graph. In event begin play, we need to get the player controller, right to tell it to use this input as a controller, right? This input mapping context as a controller, right? So in here, we get the enhanced input player subsystem and we add the mapping context to it. Add mapping context. The mapping context that we want to add is called IMC APC. That's it. Now, we can go down in here and search for I L around, right? The event of it. No, it will give us a action value, vector two D, right? So we can drag and drop and break this so we have access to X and Y. First thing first, we want to be able to look left and right. So how we can do that, there is a node that is called at controller Ya input rotation around the Z axis for looking left and right, and we want to use the X of over mouse to do that, right? Now, next thing, we want to be able to look up and down, and for doing that, we need to add controller pitch input. The pitch input is the rotation around the Y axis, so we can look up and down. And we want to use the Y of our mouse to do that. Now, if we head compile save and Runo game, you can see we can't look around APC why we can't If we click on spring arm, there is an option that is called use pan control rotation. By enabling this, we tell the spring arm to get your rotation off of the controller rotation, and we are changing the controller rotation with the mouse, right? So not just with that we had compile and run over game, you can see, we can look around over APC. And that looks awesome. But the problem is when we want to look up, it will look down, and when we want to look down, it will look up. If you want it like that, you can have it like that, but I want to invert it. So for doing that, I will go to IMC APC. In here, I want to add a modifier of type of negate. So click in here, add negate there, and after that, expand this and tell it to negate the Y. Just the Y is more than enough. Head save. Now, if you run over game, you can see, I can look up and down left and right, and everything is working fine. Next thing that we want to do, we want to be able to go forward and backward. Let's see how we can do that. Next 6. 05 Go forward and backward: With our APC, we want to be able to go forward and backward. For doing that, I want to do it with just one input action. So in here, right click, go to input and create input action, and I want to call it a go forward. Backward, right? Dog click on it to open it. The value type, I want it to be aces one d. Because either we are going forward or backward, make sure you save, go to IMC APC, add a new mapping in here. The one that you want to map is called I go forward and backward. And in here, first thing first, with the W key, so click in here, head W on your keyboard, we want to go forward, add a new input. And in here, click in here, heads on your keyboard, with the S, we want to go backward. But right now by default, if we W or S, it will give us one in the output, but whenever we had S, we want minus one. So in the S, I want to add a modifier, so click on modifier and add a negate modifier. So with that, whenever we have told you, it will give us one. Whenever we hit S, it will give us minus one. So let's just go to BPA PC and in here, implement that. Right click in here, search for IA, go forward and backward, the event, right. In here, whenever the W or S is pressed on our keyboard, this trigger will happen, and with that, we want to get our chaos wheeled vehicle movement. There is a node inside that is called setrotal input, right? With this satrotle input, we can go forward. And with this action value connected to it, it should be able to go forward. But the problem with this satrotle input is that it is a value 0-1. And it can make our APC to go forward, and it won't be able to go backward. We will fix that. But as you can see, this throttle input is a value 0-1. If you put one in the throttle in here, it will go forward. And if you put zero in there, it won't go nowhere. So just with that, if you run a game, it should be able to go forward, right? If we had told you, you can see nothing has happened. Why nothing has happened? If you click on the chaos wheel vehicle, in here, we didn't set up the engine. So go to engine setup and in here, we need to give it a Max torque and RPM and all of that. For example, the Max torque, I want to 800 there, and engine IDL RPM, I want it to be 800 as well. You can play with these values, of course. Now, with that, we need a torque curve because by default, the torque curve is zero and zero multiplied by whatever value, it will be zero. So don't click in here, and with that, we want to add some keyframe. So add a keyframe in here at times zero, we want it to be zero. And let's say after 5 seconds, we wanted to go to full torque, right? So add the key frame. And in here, after, for example, 5 seconds, we wanted to say go to one. One is Max Trottle Max torque, right? Doesn't matter what is the max torque. It will automatically go there, right? For you to see both of them, we can click on both of these, so we can see both of them. This is linear. We can just select both of them right on one of them and make it auto. So it will create a curve for us so it will look more natural. That's it. No, we have a curve. Now, with that, if you head compile save and Runo game, let's see what will happen. If you head W, you can see it is going forward. But the problem is, it won't go backward. Why it's not going backward. Because there is a node for going backward as volt, and the node is called set. Let me search for it set break input. I know break is for breaking, but we can use it for going backward, right? So connected like this. And this break is, again, a value 0-1. So if you put one in there, it will go backward. So with this one action value, how we can do it. Wherever we had told you, it will give us one and one for the throttle, it will go forward. But whenever we hit S, it will give us minus one, this throttle, because it is a value 0-1. Nothing happened to it. And this break input, again, nothing happened to it because it is, again, a value 0-1. So what we want to do we want to multiply this action value by minus one. I will explain why. Multiplied by minus one and connected to break. While I'm doing this. If we had told you this action value will be one and one for throttle, it will go forward. And one multiplied by minus one, it will give us minus one. And because it is a minus one and this break input is value 0-1, nothing happened to this one as well. But if you hit S on or keyboard, the action value will be minus one, right? Minus one inside the throttle because this throttle is value 0-1. Nothing happened to it. It won't go forward. But minus one multiplied by minus one will give us one. And one in here for the break that is a value 0-1, it causes it to go back. Just head compile, save and see it. If you run over game, now you can see, we can go forward, and after that, we can go backward as well. You can see we are going backward with set break input, right? We are going backward. But the problem is, if we release W and S on our keyboard, again, it will continue going backward. It has easy fix. How we can fix it. Whenever we release W or S on our keyboard, this complete will happen, and we want to set both of these throttle input and break input to zero. So hold Control, select both of them, and control C copy it. Control V to paste it over here, and connect this chaos wheeled vehicle movement to both of the targets because these nodes are inside this component, right? And whenever we release W or Skey, we want to change the throttle and break to zero. That's head compile save. And now if you run over game, we can go forward And if you release the Olkon or keyboard, it will stop slowly. You can see it will stop slowly. And the reason is that it stop slowly because the friction is not too much, right? We can increase the mass. So in here, if you go down, we can change the mass in vehicle stop to, for example, 2000, right? Just with increasing this mass, let's just test that to it. If you run over a game and go forward, if you release the Olu ki, you can see the shark. I will stop a little bit faster. But for making it stop much faster, we can implement the handbrake. We will do that next. 7. 06 Handbrake: For making our vehicle stop much faster, we can add handbrake. For doing that, we need an input. So go to input folder. Like this, right, click in here, go to input, create input action. This spawn, I want to call it a hand break. You don't need to go inside it. You can just save it. You need to just implement it in IMC APC. So add the mapping in here. We want to map the IA hand break, and when do we want it to happen? Click in here at the spacebar. So whenever we hit the spacebar, we wanted to use handbraak. So go back to BP APC, and in here, right click search for IA handbrake. We need the event of it, right. I don't want to use the trier, what I want to use, I want to use the sort and complete. When this happen, whenever we press the spacebar on our keyboard, this assort will happen. And whenever we release the spacebar, this complete will happen. And with that, we can get the chaos vehicle movement component and in it, say set hand, break in, put, right? Set hand, break in, put whenever we press the spacebar, we want it to be enabled. We can just Control C control, paste it over here like this. Whenever we release spacebar on our keyboard, we want disable the handrake. If you had compiled, save and run over game, let's just go forward. You can see we are going forward, and if you release all you can hit the space, you can see it will stop much faster. If you go backward, again, it should work. Again, go backward, at the space, and you can see it is working fine. Now the problem that we have is that where wheels are not rotating. Let's see how we can fix that. Next 8. 07 Wheel animation: No, we can go forward and backward, but the wheels are not rotating. Let's see how we can fix that. For fixing that, go to Content drawer, go to Blueprint folder. If I can find it, go to Blueprint folder in here, right click, create a Blueprint class, go to all classes, and in here, search for vehicle animation, instance, right? This is really important. We call animation instance, head select, and I want to call it ABP for animation Blueprint APC, right? Don't click on it to open it. It will tell you there is no skeleton selected. Head yes to select it. We want to select our APC, so click the skeleton for APC and head Okay. And after that, it will be opened by itself. No next thing that you want to do in here, we need to get the mesh space, f pose. This will give us all the information about the bones so we can modify them, right? With that, there is a node that will do everything for us that is called wheel Controller, right? That's it. Just with that connected to output pose and head compiled, save, go to BP APC, click on the mesh, and in here, choose the anim class that we create together, ABP APC, right? With that, if you run over game, just look at it. We can go forward, and you can see it's working fine. We can hit the space to break. You can see. We can go back for as well, hit the space again to break. And you can see the suspension knows working with it as well. And it looks awesome. No next thing that we want to do. We want to be able to go left and right, steer a vehicle. Let's see how we can do that in next. 9. 08 Vehicle steering: No, for going left and right. We need an input. So for doing that, let's go to Content draw, go to Input folder, right click in here, go to Input and create input action. I want to call it IA, turn right left. I'll click on it to open it the value type, you want it to be access one d or float because here we going left or right. Head save. No, we need to map it, go to IMC APC, add a new mapping and in here, the one that you want to map is called IA turn right left. And when do we want this to happen clicking here, head D on your keyboard. Whenever we had D, we want to go right add a new input like this, click in here, head A on or keyboard. Whenever we had A, we want to go left. But by default, as you know, if we had D or A, it will pass one in output, right? So we want to negate the A with a modifier. So add the modifier and click on negate. We want to negate it whenever we had A. So whenever we had Dn on our keyboard, it will pass one. Whenever we AO keyboard, it will pass minus one, Headsaf, go to BPAPC and in here we want to steer our vehicle. So in here, right click, search for IA turn left and right, right or left, doesn't matter, right. There is a node in the chaos wheeled vehicle movement that is called steering. There is a steering inside it. It's called set steering input. We can just connect it like this action value to it, right? That's it. If you run over game, let's just see head D, you can see the wheels are going right. And whenever we head A, the wheels are going left. But when we release it, it won't go to the middle, right? That is a problem. How we can fix that in here, we can just expand this. Whenever we release D or A on our keyboard. We want to change this steering to zero, right? So we can just continue C control to paste this over here like this. Whenever we release D or A on our keyboard, this complete will happen and we change the steering to zero. Now, if you run over A on our keyboard, it will go left. And when we release it, it will go to middle again. Again, go right. Again, it's working fine. If we go forward, let's see what will happen. If you at A, you can see, it will go left. No, you can see whenever I D on our keyboard, it will go right and you can see the speed is too much. And whenever we at A, it will go left. You can see it's working fine. See I'm going left, no. Now that we can steer and go left and right, and everything is working fine. No, next thing that you want to do. We want to be able to change the gun, pitch and Yao with the gun, we can aim at the stuff and shoot at them. Let's see how we can do that. Next we 10. 09 modify gun bone: No, we need to be able to rotate over gun so we can face over gun or aim over gun at other things. So for doing that, we can do it in mission blueprint. And how we can do it with modify a bone. Which bone, let's just go here. In the skeleton, we can open it like this. And in here, search for gun. And you can see we have a gun joint. So with that, we can bring it up and down. You can see. And we have a turret joint as well. If you search for turret, Turret joint. With the turret joint, we can rotate it left and right. So we have two bones gun joint and turret joint. With the gun joint, we look up and down, and with turret joint, we look left and right. For doing that, there is a node in animation blueprint that is called modified bone. So let's just make some space like this and drag and drop from this search for modified bone. The bone that you want to modify is called gun joint for bring it up and down, right. Next, we don't want to change the translation, so we can tell it not expose it as a pin. We don't want to change the scale as well, so we can click in here, tell it not to expose it as pin. We want to just change the rotation. So the rotation mode, we want to say add to existence. So if it has already some rotation, it will have it after that. The rotation space, we want to change it to bonus space. That's it. No, which one do we want to change to look up and down? If you right click on here, split a stroke pin. The one that we want to change is called pitch rotation around the YXs we look up and down. If you put 45 in here and head compile, you can see it facing up. That's cool, right? But I don't want to do it like this, how I want to do it, I want to promote this to a variable. So right click on it, promote to a variable. I want to call it Gun pitch, right. And with that, we can go to n in preview editor, and if you head compile, you can see the gun pitch there. We can change the pitch off or gun. So let me change the size of this so you can see it better like this. If I change something in here, you can see it's happening. The problem is it can go like this. We don't want it to happen like that. We want to limit it to, for example, 30 degree and like this, right? No more than that, minus seven and 30. So how we can do that, we can clamp it, right? So use clamp float, right? We want to clamp it between minus seven and 30, right, and connect these to the pitch. Now, if you head compile, save and change this value to something really small, you can see it won't change. And if you change it to something really big, it won't go more than 30 because this is clamping it. No, next thing, we want to be able to rotate it left and right. And how we can do that, we can just copy and paste this node, contro control V to paste it over here. We need to make some space as well, like this and connect the execution pin like this to here and here, right. And this time we want to change the rotation around the Z axis for looking left and right. So this rotation Z, but not for the gun joint. What we want to change is turret joint. So search for turret joint and put it there. Now, if we change the ya, for example, to 45 degree again and headcpi you can see it did rotate. Again, we don't want to do it like this. We want to do it with a variable. So right click in here, promote to variable, and we can call it gun. Ya, right? For looking left and right, know that if you had compiled, we can change it in here and you can see it. Now we can rotate or to it correctly. Everything looking good. The next thing that we want to do, we want to calculate this gun ya and gun pitch, and we will do it next. 11. 10 Calculate Gun rotation: Know what we want to do. We want to calculate the gun pitch and gun yeah, so with the camera and with the mouse or controller, you can say controller. We want to change the gun pitch and gun ya, how we can do it. Let me run our game. You can see right now where our camera is facing at. We can get this rotation of the camera or the controller or the mouse and rotate the gun with it as well. So how we can do that, we can go to event graph. First thing first, we need to get this BP APC, right? So we can get the camera rotation or control rotation, right? So in here, I want to create a begin play. So with it, we can use the tri Git pawn owner and cast it to cast to APC, right? We want to cast it to APC, so we can get the controller off of it, right? For Make it easy, I want to right click in here, promote it to variable and I want to call it BP APC, right? Now with that in each frame on this blueprint update animation, we want to get APC. First of all, we want to check if it is valid. Okay? If it is valid, we want to get the rotation of our controller or over mode or over camera, right? For doing that, we can grab from this BP APC and get the control rotation. This is the rotation that camera has or mouse has or control has, or mouse is or controller, right? Next, we want to get the rotation where BPAPC already has, and how we can get that, we can get it by get actor rotation, right? And now with these two, there is a node that is called Delta rotator, right? With this Delta rotator, it will give us the difference between the rotation that our controller has and the rotation that we APC has already, right? So let me connect this to A and connect these to B. It will give us the difference between them. And what we can do, we can break this one, right, like this, break the rotator, and that's it. This is the gun pitch, and this is the gun ya. And we can see it inside these variables that we have. For example, gun pitch, you can set it with this value, right. And we have Gun ya like this, set it with the yacht that we calculate from here and connect the execution pin to it, so it will be updated every frame. If it is valid, of course, you can see if you had compile save go to our level and run our game no, you can see, I can look left, right, up and down. You can see we can shoot up and down left and right. Know where APC is ready. We can spawn a projectile. You can see it. That looks awesome. No next thing, we want to create a projectile so we can shoot it. Let's see how we can do that. Next 12. 11 APC projectile: No, we want to create a projectile for over APC. Let's see how we can create that. For creating that, I want to go to content drawer, go to Blueprint folder, and in here right create a blueprint class. This time, a type of actor, and I want to call it BP APC Project type, right? The I'll click on it to open it. In here, first and first, I want to add a collision sphere. So search for collision, and we want to have sphere collision. That's it. I want to make this as default scene route. Next, I want to add a sphere, right? Sphere like this as a child of that. And the size of it, I want it to be 0.1 for all direction like this. And the size of the sphere, collision. I want it to be 16, right? That's it. The size of this sphere is not enough. Let's just increase it to 0.3 maybe, right? I think that looks much better. And I want to change the material of this sphere for the material of it, I want to go again in here, right click create a material, and I want to call it red. Right? I'll click on it to open it. And in here with the base color, we can change the color. For example, if I click in here, make it red, you can see it will be red, but I want to have some glowiness. So that's why I hold tree on my keyboard, had leftmost button. So it will create Constant Tree Vctor or you can just right click Search for Constant tree Vctor. With this, we can choose a color. For example, the red, we want it to be one. That's it. And we can connect it to base color. No, we want to have some emissive color, some light, right? For doing that, we can just connect these to emissive color. It will glow a little bit, but it is not a lot. We can just multiply this by really big value like 100 and connect it to emissive color. And now you can see it's glowy. You can just save it, close it. Now, in APC projectile, we can change the material of this to M red. Just search for it. Go down. You can see it over here, and that's it. This is our projectile, and it looks good. Next thing that we want to do, we want to add the projectile movement, right. With this projectile movement, we can have initial speeds. So for example, 8,000 and Max's speed 8,000. And next I want to make it bouncy, as well. So it will bounce a little bit. Of course, destroy it this won't bounce, but at some cases, this looks more natural. If you go down, we can have a velocity. I want to put 3,000 in x direction. That's it. No, let's just say so. If you go toward the X direction, you can see it over here. If you had simulate, no, you can see it is going away. That looks awesome. Next thing that I want to do, I want to click on this sphere collision and set its collision. If you go here, I want to change this collision preset to custom and let's just expand this so we can change it. The thing that I want to change is to block the physics body. And block the destructib, right? Next thing, I want to tell it to ignore the pawn as well, and that's it. That is the collision for over a sphere collision. No, click on the sphere tatic machine here. For the collision of it, I want to tell it to don't have any collision. So put it on no collision, and that's it. Let's just test it one more time. If we had simulate, you can see, it's working fine. No, in next video, we want to fire up the projectile. Let's see how we can do that with leftmost button in next video. 13. 12 Fire weapon: Now we have a projectile. Let's see how we can use it. For using it, first, we need an input. So let's just go to Inputs folder in here. Rightly, go to input and create a input action. I want to call it IA Fire, right? And we don't need to change anything inside it. We can go to IMCAPC to map it there. So add a new map in here and select the IA five, right? When do we want it to happen? Let's just click in here and hit if Most button. So if Most button, put it there, right? So know whenever we hit if Most button, this event will happen. So right click in here and search for IA fire, right. And with that, let's just expand this. Whenever we press it, we want to spawn or projectile. So use span actor. And the actor that you want to spawn, it has projectile inside it. So let's just search for projectile, BP APC projectile, put it there. No, we should tell it where to pawn it. We want to spawn it at the tip of our gun. So in here in the skeleton, if we search for gun, you can see, there is a gun joint socket, a tip of our gun. You can see it. That looks awesome. We can just right click on it, rename it, and again, right click on it and copy its name, right? The name is important. Now, with that, we want to get the transform of that socket. How we can do it, we can get our mesh, and with it, we can get the socket transform. So get the socket transformed. I need socket name. So Control V to paste that gun joint socket and connect it like this, right? That looks awesome. Now, with that, let's just head compile, save, go to our level and run over game. Now, you can see, I can shoot it, right? You can see that looks awesome. We need to add some sound as well. So let's just go to BP APC. After we spawn this, we can spawn sound at location, right? The sound that you want to spawn is called S cannon fire single, right? That's it. I need a location. So we can break this transform at tipo over gun and use its location for the sound. Now, let's just compile, save, and run over game again. Now, if we shoot, you can see, we have some sound as well. Next thing that we want to do we want to spawn a system A Niagara system this time attached, right? The Niagara system that we want to spawn is called main cannon N is main cannon, right? I need to attach to a component, so we can attach it to the mesh, right? And the attach point name, we can just use this socket name, Control C to copy it and paste it for the attach point name. We want to attach it there. For the location, we can get this location of tip of Ogun, and for the rotation, again, we can use the rotation of the tip of Ogun. Now, the location type, I want to change it to keep word position, and that's it. Let's just compile, go to our level and run over game. Now, let's just shoot. You see? It has some visual effects as well. You see? That looks awesome. We have some visual effects. Cool. Now with that done, we have a projectile, but we don't have nothing to shoot at. We should have some object, so we can shoot at it and move it a little bit right. Let's see what we can do that. Next 14. 13 Hit physics body: Now that we are firing over weapon, let's see how we can hit something actually. For doing that, this is our players start. I want to add a sphere in here, right? Click on Add, go to shapes and add a sphere, right? And I want to make this sphere a little bit bigger. So make sure this is lock and put five in there, for example, so it is a little bit big, right? I think it is too big. Let's just put it on three. Yeah, that's good. Now, in here, I want to go down and tell it to simulate physics, right. After that, go down and make sure this is physics actor, right? So we can hit it. No, let's just run or game. No, you can see. When we hit it, the projectile is bouncing. You see, we hit it, and it is bouncing. But one problem that we have when we hit it, it's not moving at all, right? You can see it's not moving at all. Let's just go a little bit back and hit it. You can see. It will bounce on it. That looks awesome, but it's not moving. How we can make it move. If we go to our projectile, go to event graph. And in here, I want to right click and search for event hit. Right? This seventh head will happen whenever we hit something, right? So let's just test it with the print testing, and that's it, head compile and no let's just run it to see if it's detecting the head. Now you can see it detecting the head. That's cool. No, we can just delete that. First thing first, whenever it hits something, it can create multiple head events. So that's why I want to use due once. So whenever it hits something, if it is giving us multiple head just one of them will happen, right? This complete will happen just once until we reset it, right? We don't want to reset it. Whenever it hits something, we want to spawn some explosion, add some force, and all of that. So it can move the sphere, right? First thing that we want to check in here, we want to check the other component to see if it is simulating physics or not. If it is simulating physics, add impulse to it, add some force to it, so it will move. So in here, we check Es simulating physics, right with it, we can check it with a branch. Search for branch. If this simulating physics, this true will happen, right? In that case, we can add a impulse at location. So search for add impulse at location, choose one of these. You can just let this sphere. We don't need it. Just search for addimpulse at location. The target that you want to add impulse at location is this other component, right? So connect the other component to it. Know it need impulse, how we can get impulse. Because if we hit it this side, we want to add impulse on this side as well. So it will go that way, right? So for doing that, we can get the velocity, get the velocity of our projectile, we get lost node. We can multiply it by some value because by its own, it's not too much. We can just right click in here, change it to float. So we multiply X, Y, and Z at the same time, for example, by 100, and this is our impulse. But on what location we want to add this impulse. We can get the location of or projectile when it hits something. It is the location that we want to add impulse, right? So we can just say get actor location. Right, then that's it. No, it will add some impulse, some force to our sphere. Now, let's just say state. Now, if you shoot it, you can see it's moving toward the way that we shoot at it, right? Again, if we go this way and shoot at it, you can see it's moving that way and you can see it. It's working fine. And we have some bouncing as well. We don't want that bouncing, but as you can see, it's working fine. Let's just go to it. If we can reach it, right, let's just go to it like this, we can push it as well, right? So, no, we are close to it because there is not a lot of friction. That's why it's moving too fast. If we shoot it, you can see, we make it a stop and we can shoot it again to move it around. You can see how beautiful it looks. That's it. We have a projectile that can move physics body. Cool. Now it's time to create some destructible object. Let's see how we can do that. Next 15. 14 Import destruction files: No, we have a sphere in our scene that we can push it with the projectile, right? It has physics enable on it, but we can't destroy it. We can't take it apart with a projectile, right? From now on, we want to talk about how we can take apart things, destroy things. First, I will teach you the basic stuff, and after that, we go for creating a building, right? For doing that, there is a zip file a description of this video that is called destruction. Download it, put it on your desktop. You can just do click on it, dragon drop the destruction folder into the desktop, and know with this folder, there should be assets folder inside it. That's it. Now, go to ARIEL Engine Project, go to Content drawer, right click on Content folder, and in here show it in Explorer. In the content folder, the destruction folder should be there. So dragon drop it, put it there. Now, if you go back to ARL Engine, you can see that there is a destruction folder. You won't see anything inside it, so you need to close Areal engine and open it again. So let's just go back in here and open up the project. Now, with that, if you go to content drawer, you can in destruction folder, in asset folder, there are some stuff, for example, some aesthetic mesh for the building, right? If I go into meshes of interior, for example, you can see it. If I go to L one for level one, you can see there are some glasses, some concrete, and you can see it, right? With this, we want to create a building, right? And if you go back to *** folder, there is a fields folder as well. There are three blueprint in here. This Tre blueprint is published by Al Engine developers. It actually in the engine itself, but I did copy it here, so you don't need to go to engine folders because it's too confusing if you go there. So with these fields that Areo engine developer created for us, we want to create explosion, for example, and take apart things, right? So that's it. All the necessary stuff is here. It's no time to be able to take apart this sphere. 16. 15 Fracture sphere: No with everything important, let's see how we can destroy or take apart this sphere, click on the sphere and go here, change from selection mode to fracture mode. With Shift plus six, you can go to fracture mode and with Shift plus one, you can go to selection mode. Go to fracture mode. And in here, first thing that we should do, we should create a geometry collection off of this sphere. The geometry collection is the collection of the parts of this sphere when it is destroyed and it did take apart, right? So for doing that, click on NU, and it will tell you, Where do you want to save this geometry collection? I want to go into destruction. And in here, right, click on the destruction folder, create a new folder, and I want to call it GC for geometry collection. And inside it again, I want to right click, create a new folder and I want to call it basics, why I'm calling it basics, because creating a building that is destructible is really complex. So that's why I want to teach the basic stuff with this sphere, and after that, we go and create our building. So it's really important that you learn this, right? So save it in basics. You don't need to change anything, just click on Create Geometry collection, right? Now, you can see if we go back to selection mode, what will happen. Color of it is changed, and our sphere is replaced by GC sphere, right? And what is this GC sphere? If you go to disruption folder, go to GC Basics, you can see there is a GC sphere, geometry collection sphere in here, right? We can just drag and drop it, put it wherever we want, right? If you hover over it, it will say, GCSphereGeometry collection, right? So, no, we did create our geometry collection. But if we bring it up, for example, in here and head run, you can see it is hitting the ground, but it's not destroy it. Why it's not happening. Again, if you click on it, and go to fracture mode like this. In the level statistics, you can see there are just one level, and this level have just one bone. That's why it can't be destroyed. How we can make it destroy, we can go to fracture category in here. Maybe for you, this is like this, right? That's why I didn't make it bigger, so we have more space in here and we can see everything, right? So click on uniform. I want to fracture it uniformly. You can see, no, there are some lines that tell you how it will be fractured, right? So you can change some stuff, for example, minimum sites and maximum sites, right? If you go down, there is lots of things for randomizing stuff, but I don't want to change anything. You can actually change lots of things in here. And when you increase these values it will drop your frame per second, FPS, your optimization. So I don't recommend it to make it really high. So just with that, if we hit fracture, it will fracture it for us. And you can see in level one, we have 19 part. For just testing it, there is explode amount that is value 0-1. And if you change this, you can see how it is fractured. You can see this way it will be fractured. And for you to test it actually, you can run the game and you can see when it hit the ground, it will be fractured. The problem right now is that the color of it, right? So if you change the explode amount, you can see the colors of it. We don't want it to be like that, right? For fixing it, so it will have a color of sphere, not this randomized color for each bone or each cluster, right? We can go to detail panel and in here, go down in general, inside the chaos physics, we can tell it don't show bone color. That's it. Know with that done, if you go back to selection mode, you can see the color of a sphere is back. And if you run over game, when it hit the ground, you can see it will be fractured. That's beautiful, right? No, again, I want to go to fracture mode and change this explode amount to zero. So in the viewport, we can see it correctly. And after that, go back to selection mode again. If you put it on the ground, let's see. I don't want it to be exploded by its own so let's just run over game. Again, it did explode because it hit the ground. Go down a little bit, run no, you can see it didn't explode. And if we hit it by our car, you can see we did make it explode or destroy, you can see it. That looks really cool. No, next thing that I want to talk about is the material. The material for outside of this sphere and material inside for the inside part of it, right? So let's see how we can do that. Next 17. 16 Fracture material: No, for changing the material of outside of it inside of it, again, we need to go to the fracture mode. So click on it, go to selection mode and change it to fracture mode, right? And in here, there is a part that is called. If you go down that is called material in utilities, right, click on it. And for you to see it properly, I want to make this smaller like this and you can see it over here. No, right now, if you go to asset materials in asset material in here, there is basic shape material. Let's just change it to red, the one that we create before, this red one. Now, what will happen. If you go to selection mode and Runo game, you can see the outside of it is glowy red. But if you hit it, let's see what will happen to inside of it. You can see the inside of it has the outside material as well. What we want to do we want to change the inside material. So for doing that, we need some material. What I want to do, I want to go to the GC Basics folder and create some material. So right clicking here, create a material. This one, I want to call it red. Okay? I don't want it to glow at all. And again, create another one. This one, I want to call it blue, right? For the red, in here, we can just change the base color to red, so it will be red. I'll click on the base color. And for the red, I want to put red to one, green to zero, blue to zero, and that's it. We will have a red color, right, easy. Now, we can just head save and head, yes, so it will be saved. You can see it. Now, let's just go to blue. You can do this yourself. Click on base color, change the red to zero, green to zero, and blue to one, and it will give us a blue color. Make sure you save it before closing it, and that's it. We have two material that we can use it for outside and inside of our sphere. So now, click on the sphere, go to fracture mode for you to see it better. The explode amount, I want to put it on one, so it will be like this, right? Now, go to material down here. Right now, again, the amount of material that we have is just one index zero. And if we change it to, for example, blue, outside and inside it will be blue. It changed to none. So again, selected to blue, and it will be there. Now, you can see the outside and inside of it is blue. But we know that we should have multiple slot, one for outside and one for inside, right? No, there is just one for outside and inside both. So for adding more slot, you can just click on add material slot, and now you can see we have two slot in here, right? So for the slot zero, we want to use it for outside material. And for the slot one, I want to change it to red. Let's go down if I can find that search for red and red. So I want to use this slot for the inside material, this inside part, not the outside part, right? So if we just hit assigned material, nothing happens. If you go to selection mode and you can see, again, all of it is blue. Let's just go back to fracture again. How we can change the inside to red, how we can do it. We did at this slot there. There is assigned material in here. So we want to tell it to inside material will be red. How we can do it. You can see first the assigned material, we have zero and one, you can see zero and one. One is red. So make sure you go to fracture hierarchy, and in this hierarchy in here, select all the fracture porch 0-18, right? Sphere zero. If you click on this first one, it is level one, that whole sphere. And if you click on this inside one, you can see how it is selected in here. We need to select all of these inside porch. Okay? And after that, go to assign material, choose the material one to be paint on the face of internal faces. So click on internal face, hit assign. No, it did change. For you to see it better, let's just go back to selection mode. Now, you can see the inside of it is okay. If you run over game, you can see a default, it is blue. If you hit it, the inside of it will be red. That's it. So again, make sure if you go to fracture mode, make sure first you select the parts that you want to change the material inside of it, right? Go down, go to material, create the materials that you want. After that, assign the material, for example, index one that is red to internal faces of these parts. That's 18. 17 Damage threshhold: No, we have a sphere that is dsructible, but I want to show you some more options on it. So for doing that, let's just first change this explode amount to zero so we can see it, actually, right. After that, go back to selection mode. You can see this is or a sphere. And if we go to detail panel when we select it and we go down, there is a damage category inside the chaos physics, right? So go down. In this damage category, if we expand this damage threshold, you can see the amount of force or damage we should employ to this one, so it will break. The index zero, Index one, index two, and you can have more, right? Let me again go back to fracture mode. You can see we have level zero, level one, and so on. And we have it for the damage as well. Level zero, level one, level two, you can have multiple, right? By this much, the number that we add in here, it will be destroyed if we had it, right? If I hold control, I can create a duplicate off of it and change this value to see the effect. I want to divide all of this by four. Okay? It will calculate it for us. Divide this by four and divide this by four as well, right? Now, if you run over game, you can see when we hit this one, it will be destroyed. It will take apart, right? But if you hit this one, you can see it needs less force to be destroyed, right? That's cool. Again, let's just duplicate it one more time. Hold all, duplicate we drag and drop like this. And again, I want to go to damage and again, divide it by four. This one divide by four as well, and this one divide by four as well. No, this needs less force to be destroyed. Let's just hit it. Just go to it and hit it. You can see. Of course, it The amount of disruption won't change because in the fracture, we decide how it should be, but as you can see, the amount of force to destroy this one was less than this one, and this one was less than this one. You can see I did hit this, but none all of the parts is taken apart, right? Again, I want to click on this one and duplicate it one more time over here. And this time, I want to multiply it by four. All of these damage thresholds multiply by four. Let's see what will happen. Multiply this by four and multiply this by four. And now, if you run over game and hit it with our car, let's see what will happen. You can see we are moving it, but it's not getting destroyed. Let's just go back and really hit it much faster. I don't think that anything can happen to it. And that you can see, I did hit it really hard and it get destroyed a little bit. No, let's just again duplicate it one more time. This time, again, multiply it by four again. This time, we won't be able to destroy it at all. I don't think that we can do that, multiply by four and multiply this one by four as well. And no with that, let's just run over a game. Let's just go back and hit it, just like this and you can see it won't be destroyed at all. Go back at the space so we can have a handbrake as well, and let's just hit it. Again, you can see we are hitting it really hard, but nothing is happening to it because the damage threshold is much higher. Let's just go here and hit this one. You can see the damage threshold of this one is high, but because we hit it really hard, it did destroy little. This one is much easier to destroy. And again, this one is really easy to destroy. Just heat it a little bit. It will be destroyed, right? That set about damage threshold. 19. 18 Damage with Projectile: No, we have some sphere that we can make it destroy, right? But the problem is with our projectile, we can't destroy it. Let's just test. Run or game, shoot at this one, you can see, I'm shooting it. Nothing is happening. Again, this one, again, you can see. Nothing is happening to it, right? So we need to find a way so we can apply some force so we can destroy these ones. Right now, it is hitting it. It will add the impulse to it, but the impulse is not enough to destroy it. For doing that, our engine developers create some blueprint for us to add some force to whatever we hit. And that's inside where let me show it to you in fields in destruction, assets fields. There is FS field. This is for applying some destructible force, for example, explosion force, right? So no, we need to use that. For using that, I want to open up a projectile, go to APC folder, go to Blueprint and open up the APC projectile, right? And in here, after we add a impulse at location, we want to spawn this force. Spawn actor from a class, the actor that you want to spawn is called FS. You can see FS field. That's it. Just choose that. I need a transform. For the transform, we need just the location when this projectile hit anything, right? So we can break this it result. Let me bring it over here and break it. And this will give us an impact point, right? We can use that impact point to make a transform, right? Make a transform with that impact point. And this is our Transform. We could just get actual transform, but this is more than enough and it's more precise, right? That's it. Next, this FS field needs to be triggered, right? We can decide when to be triggered. We want to trigger it whenever we spawn it really fast. There is a function inside it that is called C trigger, right? C trigger, right? This will trigger the force. Let's just test it with this one. If we run over game and shoot at this one, you can see it did add force to it and destroy it, right? Again, shoot at this one. You can see destroy it, shoot at this one. Again, it's destroying it. And shoot at this one, again, it is destroying it. And you can see how beautiful it works, right? No, let's just add more damage threshold, right? So hold out, create another one, and again, this one, multiply it again by four like this, multiply this one by four. And multiply this one by four as well. And I want to add another one. And again, this one, I want to multiply it by four again, right? Multiply by four. This one be multiply by four again, and this one multiply by four again. If we run over a game and shoot at those one, you can see, it's like the force is so much that it doesn't matter what damage threshold it has, it will be destroyed, right? What is the reason? 20. 19 Change power of explosion: No one big problem that we have in our level is that it doesn't matter which one we shoot. You see? I'm shooting this that the damage threshold of it is too much. And this one, that the damage threshold of it is a lot less. It will be destroyed, right? We don't want that to happen. Why it's happening, it's because this FS field is really powerful. We need to change that. For changing that, we can get this return value of our FS field, right, and set the strain magnitude in it. Set a strain magnitude, right? Connect the execution pin to it. After we set it, we can connect it to see trigger to trigger it, right? So for example, if I put 5,000. Let's see what will happen. If you run over game, shoot at this one, nothing is happening. Shoot at this one, nothing is happening again. Shoot at this one, nothing is happening. Again, let's just increase that by 50,000, right? 50,000. Now with that. With this 50,000, if you run over game, shoot at this one, it will be destroyed this time. If I shoot at this one, it won't be destroyed. If I shoot at this one, nothing is happening to it, right? So again, if we increase this value by another zero, and if we run again, shoot at this one. It will be destroyed, shoot at this one, it will be destroyed. Shoot at this one, it will be destroyed. Shoot at this one. No, you can see. This one is resisting. So again, if we add more zero to it, one more zero, if you run over again, this one will be destroyed. This one will be destroyed. This one won't be destroyed. Again, we can increase this. So with it, we can decide how much force explosion force it should be happening to that sphere, right? Now, you can see some of these sphere we can destroy because the damage threshold of them is not a lot, but some of them we can't destroy. No, you know how you can play with this explosion force FS field. 21. 20 Size of clusters: Another thing that I want to talk about is the size of this sphere. So for example, let me run over game. You can see with the force power that we have a strain magnitude that we have, we can destroy this one, this middle one, right? Now, let's just duplicate it. Hold old and duplicate it, bring it over here, and again, it will be destroyed, right? Let me shoot at it. I can. You can see it can be destroyed. But if I change the size like these two really big and bring it up a little bit, No, if we run over game, you can see if I shoot at it, nothing is happening, right? Because the size of the clusters or those parts, it's too much. And that's why the force that we have, it won't affect it. So the size of the clusters or those parts, those broken parts is really important. If we shoot at it really a lot, it will be destroyed eventually, but it won't happen fast you can see if you add lots of force to it, eventually it will be destroyed. You can see it, right? So the size of the geometry collection really matter. If it is big and the damage threshold is less, again, if we resist these fields that we apply to it. You see, it will be destroyed, but it takes too much effort to destroy it, right? That was it. That was another thing that I wanted to talk about. The size of the geometry collections does matter. 22. 21 Explostion VFX: No next thing that I want to do I want to add some effects to our projectile. Right now, you can see when I shoot at something, it will be destroyed. Cool, right. But there is no visual effects when we hit it, right? So for doing that, I want to go to our projectile. After we trigger this field, what I want to do I want to spawn a spawn system or Niagara system at location, right? And the system that you want to spawn is called Ordinance. I, right? For the location, I can just get the actor location. Right? Get actor location is more than enough. The location of our projectile when this event hit happen, when this event hit happen, it will give us the location of our projectile, right, and we want to have explosion there. After that, we want to spawn some sound as well. So expan sound at location as well, the sound that you want to spawn is called great explosion. The location of it, again, we can just use this location there. And after that, after all of this, we want to destroy this projectile because it has its effect on our level already, so we can destroy it. We don't want it to bounce. Now, if you run over game and shoot at something, you can see, there will be explosion there. That looks much more awesome. You can see how beautiful it is. Right? No. One problem that sometimes I see, this explosion won't happen always, and that is a problem. Why sometimes it's not happening Because in here, we check if the object that we hit is simulating physics or not. And if it is simulating physics, we add impulse at location, right? But we want to do it in both cases. We want to do the field in both cases. We want to do the explosion, even if the actor that we are hitting is not simulating physics. Just with that, if you had co point, nothing is changed, but we will prevent some bugs with it. We shoot, again, it works like before, and everything look good. I just that one. You can see we are hitting it no hop. It a lot. So it should be destroyed, right? And we did destroy it, right? Again, this one, we are hitting it, nothing is happening to it because the damage threhol is too much. Let's just hit that one. And now you can see, everything is working fine. 23. 22 Ancher fields: No next thing that I want to show you is anchor field. So let me explain. Sometimes some part of these spheres, we wanted to keep intact, right? So we can stack them up of each other, right, put them on each other. So right now, if you shoot it, all part will collapse, right? So for making some part of this resistance to the explosion, let's see how we can do that. There is another field in our fields folder that is called anchor field. And we can just drag and drop it, put it on or level and make it bigger. So wherever it is included, it won't be destroyed. So like this, we are making it big, position it at the middle, for example, in here. So no, each cluster part that is inside this box, it won't be destroyed. But just by its own, it won't work. We should tell this geometry collection that this is your anchor point. You should be anchored to this box, right? So for doing that, we should click on our geometry collection. Go to GC or Geometry Collection tab. And in here, you can see there is initialized field. We can add fields to it. For example, anchor field, right? Click on add. We should decide which anchor field we want to add it to. Either we can just click in here and choose the anchor field or we can just click on this peak actor from a scene like this and choose it there. Now, you can see it is there. And no let me put this really at middle like this. Now, this part will be destroyable and this part won't be destroyable. Let's just see. If we go to this part and shoot at it, you can see this part is destroying, but the other parts that is inside that anchor fields not getting destroyed. We should shoot at a lot to make it destroyed. You see? We should shoot at a lot. But it is persistence. You can see. Again, it's not falling off because there is an anchor point. You should shoot it a lot, so the anchor point will leave the clusters, right? That's it. This is the anchor field. And with the anchor field, we can do a lot of things. If I select both of these and bring them up, now, if you run over game, you can see, because it is anchored to that anchor point and anchor point doesn't have any physics, it won't be able to go down. We can shoot at it, and the part that is destroying will fall off. But because there is an anchor point, it will stay there. The rest will stay there. You see? We should shoot it a lot so we can destroy everything. Cool, shoot them and you can see and there is a part there that is stained there. That's it. Why we want to use it, let's say we have a building and these buildings have some columns. These columns should be more persistent to the damage to the field, so it won't be destroyed really easy. So that's why we need anchor point because in each building, we have some columns that make our building more stable, more powerful to the winds and all of that. 24. 23 Attach two Geometry collection Part01: No, let me give you another example. For example, this one, I want to duplicate this anchor field, hold out, duplicate it, and put it for this one, right? This does have lots of damage threshold. Let's just bring the top as well, like this. And first thing first, as you know, we should click on our geometry collection and add the anchor field to it, right? So click in here, choose the anchor field, so it will be added there. Now, again, if you run, you can see if you shoot it, just this part will be destroyed easy. But the part that it has anchor field on it, it won't be destroyed at all this time because the damaged threshold is too much. You see, everything looks good. You see the parts that is inside the anchor field is not destroyed. Let's just shoot at it and see take too much shooting to destroy that. Another thing that I want to test in here, I want to create one of these, for example, this one, put it over here. You know that the threshold of this one damage threshold is a lot less, so we can destroy it really easy. Can see? No, what I want to do I want to create a box in here, so we put this sphere on top of that, right? And we want to anchor this sphere to that box. Let's see what we can do that. Go to A, go to shapes and create, for example, a cube, right? In here, I want to make this cube bigger like this and like this and in Z direction bigger like this, right? And I want to bring it down like this, and I want to put this at top of this box or column, right? Let's just put it there. Go here and put it like this top a little bit. Now with that done. If you run over game, let's see what will happen. It is a stay there, right? But this column, you shoot it, let's just see what will happen. Nothing is happening to it, right? So first thing first, with this column, what I want to do I want to go to collisions and change the collision presets to physics actor, right? Now, if you run over game, let's just look at it. You can see? No, we can't get it. No next thing that I want to do. I want to go to physics and tell it to simulate physics. That's it. No let's run or game. And you can see, because we are simulating physics, no, you can see at top of this box, the sphere is getting destroyed. Let me bring this sphere a little bit up like this to see if it gets destroyed. No, this time it is okay. No. After some time because this is a physics body is touching this sphere, that's why it's getting destroyed. That's not what we want. We are putting an sphere on a column, and it should stay there. Why it should be destroyed? How we can prevent that? 25. 23 Attach two Geometry collection Part02: First of all, let's create a geometry collection off of this column. So click on it, go to fracture mode, and in here, create a new, go to destruction, save it in the GC basics, right, and call it GC cube, Head create geometry collection, and we have it. I want to make it uniform. So click in here. You don't need to change anything. Head fracture and it will be fractured, right. Now with that, again, we need to go to material. I want to change the material. So select all of these clusters, right? We want to add another material slot. This one, I want to put it red as well. The internal, I want it to be red. So let's just put red there, or let's just choose that glory red, right? This time, e red, right? The glory one. Now, with all of this selected, we want to tell it to index one to apply to the faces of internal faces head, apply assign, and know if we change this and go close. Let's see if it's affecting it or not, it a sign again. We go to selection, and in here, don't show bone color. You can see the internal or red. That's it. Now, let's just again go back to fracture and change this explodamun to zero. Now, again, let's just go back to selection. If we run over again, none of them is destroying because both of them are geometry collection. If you shoot one of them, you can see it will destroy both of them. If you bring this up a little bit and run over a game, let's see what will happen. Both of them are destroying. But let me bring it a little bit closer. A little bit of touch. You can see a little bit of touch. With gravity, it can destroy both of them. You can see let me rotate these players start so you can see it as a start like this, Runo game, can see it is destroyed. So know how we want to fix that. We can use anchor fields, right? So let's just add anchor field. Just rag and drop anchor field in here. We want to make it bigger this way, and we want to make it bigger this way as well, like this. Move it so it will be at the middle. Just play with it until you reach the result that you want. Bring it a little bit to this part, and I think that's good. Now, we want to make it bigger on this way, bring it up, and that's it. Now we have an anchor point, right? With this anchor point, we need to tell the sphere to add this anchor field as your own anchor field. So click on the Sphere Geometry collection. Click on AD, click on this color picker and choose the anchor point that we create, right? Again, click on this cube, right, make sure you select it over here, add the anchor point to this cube as well. So click on AD and add the anchor point to that as well. Now, if you run over game, you can see it will stay there. It won't be destroyed. If you shoot it, you can see it will destroy, but it won't collapse. You can see it won't collapse. And if we hit top part of this sphere, let's see if we do that, can see it will be destroyed, but it will stay there after that. You can see, next thing that we want to do, we want to be able to collapse this cube or column whenever we shoot it. You see, we are shooting it, and there is no ground to be based on, you can see it is in the sky. So we need to find a way to destroy this anchor field whenever we hit the column at the beneath over a sphere, right? But so we can do that next 26. 24 Destroy ancher filed: No next thing that we want to do we want to be able to destroy this anchor field. You can see it over here. If we hit this anchor field or hit close to it, right, because it is a explosion. It should collapse the column and the sphere above it, right? So for doing that, we need to go to the projectile. And in here, before destroying this actor, what we want to do we want to check if there is a anchor field close to the explosion, right? So for doing that, I want to use a sphere trace, multi sphere trace by channel. And for you to see it better, I want to enable the draw debuc type for duration. And by default, the duration is 5 seconds, it's more than enough, right? They start an end point. I want it to be get actor location. So get the actor location. Where they explode is happening, it'll be the actor location because they explode is happening at the event hit whenever it hits something, or projectile hits something. So no, they start an end. We can just put it as a actor location when it hits something, right? The radius, you should decide what is the radius of this explosion. For, no, I want to put it on 500, but you should play with that until you reach the result that you want. With that, let's just compile and run over game. If we shoot to column, if I can, of course. And you can see, no, there is a sphere there that with that sphere, if there is an anchor field inside that sphere, we want to destroy it. How we can destroy it. The multi sphere trace by channel give us all the actor that is inside this sphere that we saw together, right? So what I want to do in here, I want to use for each loop, use this for each loop like this, connect the execution pint it. And every element that is inside this sphere, we can break this array element. That is just a heat result. Break it first, and the actors that are heating will be this head actor. I want to cast this head actor to FS anchor field generic, right? If it is anchor field, in that case, we want to destroy it. But how we want to destroy it. We don't want to just say destroy on it. How we want to destroy it? If we go to Content Draw, there is FS destroy anchor field as well. This will create another field that will destroy the anchor field, so it looks more natural, right? So for doing that, I want to use a spawn actor from a class. And this time, I want to use destroy FS destroy anchor field, right? And after that, we can destroy the projectile as well. This needs a span transform. We can get the transform of this anchor field that you want to destroy. So get Actor transform, right? And with this, we can just connect it to a span transform. The transform have the location, rotation and scale as well. And this is really important, right? And with it, we need to trigger it as well. L over FS field, if you remember, in here, whenever we spawn FS field, after that, we trigger it, right? In this case, we want to trigger this as well to destroy it, right? You can have some delay in here as well. So after 1 second, destroy it, right? But I want to say S trigger right after that. Se trigger, it will destroy anchor field, right? And the anchor field will be destroyed right away. Now, if you run over game, let's just get close to it and shoot at it. We shoot. You can see it will be destroyed. That looks awesome. But what I want to do I want to disable this draw debye because we can't see it correctly. Let's just run again if we shoot at it. You can see, it will be destroyed and it looks more natural, right? Again, we can do it with others as well. For example, this one, let me go a little bit away. If we shoot at this one, you can see, both of them are destroyed because the explode radius is too much, right? We can just decrease this by 200, for example, and know if you run a game and shoot at this one, let me see can see it will be destroyed and it will go down. If we shoot at this one, again, it will be destroyed and it will go down. And again, if we shoot at this one, and now you can see, we are destroying two geometry collection with one head because one of them is a top of another one. Now you know all the basics, but the buildings will be more complex. So make sure you understand all of these basics. Let's see how we can create a building geometry collection that can be destroyed. 27. 25 3D files Folders: Know that we learn the basics, it's time to create our building, destructible building. For doing that, first, let's just look at the estatic meshes. If we go to content drawer, go to Assets folder in the destruction folder, go to aesthetic meshes. We have a buildings folder. After that, building SFG and after that go to meshes, you can see we have interior and we have L one, right? And here we have some stuff, right? Let me show it to you. This is a brilliant way to export three D files, right? So why it is a brilliant way to import the stuff, it's because you can see we have building SFG base column corner. Just select that. After that, we have building SFG one wall column corner. Select both of them withholding control and just drag and drop. Now, you can see, both of them are at top of each other really perfectly. We don't need to move them, right? So these two needs to be in one folder, so it will be easy to work with, right? So right clicking here, create a new folder, and I want to call it corner wall. And this one and this one, we can just drag and drop it, put it there, right? So if we need a corner wall, we can just drag and drop these two and put them there. You can see how beautiful it is. Now, let's just organize the other ones. This is the best way to get the files in three D, so you can create your modular building, right? Again, we have a column meat, right? And if we hover over this one, it's called column mid at, right? Select both of them, drag them in here and know you can see, they are perfect together, right? You don't need to position them at all. And this one on the right click, create a new folder. This one, I want to call it middle wall. These two, we want to put it there. Move it there. Not the rest. Let me show you something. Just select all of these files without these folders, dry and drop. Now you can see all of them is creating middle window with everything and everything is set up correctly. If they weren't like this, it will be really hard to work with this stuff. No I want to put all of this inside another folder, right click in here, create a new folder. Middle win dough, right? Set. We can select everything. Deselect this one with holding Control and drag and drop all of them in here, right? So with this modular design, we can create a building real easy. Let me delete this one. I don't want to do it like this. I just wanted to show you how you should get your three D files from your three D artist designer. This way is much easier. So for example, we can go here, select the two, and drag and drop it, put it over here. Make sure you click in here and surface snapping is on. It will be easier to work with it like this. No, next thing, for example, we want add a window, right? So in the middle window, select everything, right and you up, and you need to just put it in here once, right, like this. Of course, it's not okay. I will show you a better way to do this. But for now, you get the idea, right? You can see. No, we did create some part of it. We can just change some stuff like this, bring it inside a little bit. I need to go left a little bit, like this and bring it down. And, yeah, that's how it should be, right? So with it, we can create a modular building. Again, I want to delete that. I just wanted to demonstrate how we want to create it. This way of getting the three device is the best. 28. 26 Fracture corner wall: No, first thing that we want to do we want to create a geometry collection of all of the things that we have in here. For example, let's just start with corner wall. And in here, just select both of these, drag and EuropetPut it on and select, for example, this base one, go to fracture mode. And in here, first of all, we should click on New. And after that, where we want to put it, we want to put it in GC. And inside this GC, I want to create a new folder. I want to call it corner wall. Okay, or whatever you want to call it, he create geometry. And after that, you can do whatever of this one that you want. I recommend uniform because it's more optimized, but the closer v looks more beautiful, and you can see how it will fracture it, right? This much of fracturing is a lot. So what we can do, we can decrease this value, for example, for this one to ten maybe, and you can see, no, it is less to five maybe. And let's just see what will happen. Head fracture and 27 for this small part is a lot. I don't want it to be like that. So I want to show you how you can reset it, right? Right now, it is fracture to level one. I want to click on Reset, and with it, head rest and it will be reset. You can see there is no level one anymore. Again, go back to cluster. The amount of sit per cluster, I want to change it two by two, head fracture, and now you can see there is 18 of them. Again, it's too much. We can change the minimum number of cluster, and maximum number of cluster as well. Again, we can head reset, head reset again, and you can see it will go away. Again after that, go to cluster and in here, change these to five by five or three bar by five, right? And again, head fracture. Make sure you first you select it after that head fracture, and it will fracture. Six is more than enough, right? Now, with that done, let's just click on this one. Again, first, we should create a geometry collection for it after that fracture. Click on New. It will tell you where do you want to save it. It's really important to be organized in here. Go to GC, the corner wall and create the geometry there. After that, you want to use cluster and this time, we want to make more of it. So three minimum five maximum, I want to increase it by five by eight, right? So the minimum site per cluster, let's just change it 2-8, for example, right? No, it will have more part. Head fracture, and 26 is more than enough. That looks awesome. No, let's just go back to selection mode and you can see it. If you don't want to see the colors like this, you can select both of them, and in detail panel in geometry collection or GC tab, just disable the show bone color and you can see it. Now, if you run over game, you can see, it will be collapsed, right? That's how it should happen because we didn't add any anchor field. That's why it will collapse on the pressure of the weight. What it, you can see it will be. At some point, sometimes you need to increase this value, right? No, this top part, I think it should be more part when it's destroyed. So go back to fracture, right? Make sure you are selecting it, right? And if you select it and it is like this, it means in here, let me make this figure so you can see it. In the hierarchy, you are selecting the bones or the part of it, right? You can just click on the first one and it will select everything. After that, you can go to reset and head reset to reset it. And, no, I want to go to cluster and increase this value. For example, I want to reset everything to be the default value. Make sure you select it. And after that head fracture, and you can see, No, it has 89. First, it's not a good idea to have this much of parts, but I wanted to show you how you can reset it, and after that, add more to it, right? Again, go back to selection. No, what I want to do I want to get the player start and put it there so you can see it better at the beginning. Just put it over here, rotate it like this. So it will face that wall. No, you can see. It looks more natural with more part. And we can shape it up for, as well, right? Can see. That's it. That looks beautiful. We are destroying a column. This will be a column for us. No, we want to do the same for the rest, but we will do it together. So let's just continue on the next video. 29. 27 Fracture middle wall: Next, let's just go to middle column, right? So in here, go back to middle wall or middle column, select both of them, and the rag and drop it, put it over here, select one of them, for example, this base one, go to fracture mode, right in here, click on New and we want to put it on disruction folder, GC folder. And this time in GC folder, we want to create a new folder and I want to call it middle wall. Right? We should be organized, head create and know that it is selected. Let's just go to cluster or uniform. Doesn't matter which one you want to use. Max site per cluster. Let's just change it to three. And the minimum number of cluster, let's just change it 3-5 because I don't want to create much of them, so we game will be optimized. Head fracture and ten is more than enough. This one is not ten. This one is ten. If you click in here, this one is six, this is ten, so that's good. It shouldn't be like each other. After that, click on this click on New and we want to put it on the GC folder in the middle wall, he create geometry collection. And this time, we want to reset everything, right? So we have more part, head fracture, and 139, it's too much. You can decrease that by resetting it, but I want to leave it like that, so it looks more awesome, right? Just with that, let's go back to selection, and you can see the color. We can just click on both of them and tell it to not show the color. And know if you run your game, you can see they are breaking differently, and that looks awesome. You can see, right? That's awesome. Cool. One thing that I see here, you can see when we hit something, it's bouncing, it's not destroying. I think we forgot something. Let's just go to APC and open up the projectile. I think I know why it's not destroying. It destroys not happening because this cast is not going through. So let's just disconnect this. We have for each loop, right, that we want to connect the complete to it. Whenever for each loop get to be finished. This destroy will happen. Let's just start of if you run over game and shoot. No, you can see it's not bouncing and it's deleting, Destroy, right? Everything looks awesome and things. Cool. Now, with that done, we need to go for that middle one. Let's see how we can do that next video. 30. 28 Fracture middle window: No, for doing the middle window, the important one, right? So for doing that, it will take too much time. Go to destruction, go to assets, static meshes, building. And in here, let's just go to meshes, L one, we have middle window, right? Let's just select everything and bring all of them in the level. You can see it. That's awesome. No, let's just go here and one by one, fracture them. So let's just go to fracture. We don't need to do all of them together. We can just click one by one. Let's just start from this bottom one. Click on this one. This is called base Mt clean, right? Click on New. And in here, we need to go to GC folder. This time, we want to create a new folder for middle window, right? And it create Geometry collection. That's it. How many times you want to fracture it. Let's just go to cluster. And in here, this is too much, right? So let's just change it to four by five and change this 30 to 15 maybe, right? Head fracture, 30 is more than enough. This one is good. Let's just go up. Let's see what we want to do next. This one, for example, click on it, and this one, again, click on you. We need to save it somewhere. This part is just repetitive. You can just ignore it and do it your own way, but I want to show you to the end. Head create geometry collection, that's good, right? And with this much of fraction I think is not a lot. Let's say, four by eight and two to 20, right? Head fracture and 27. I don't know if it's good or not. We will see it, and after that, we will decide if it is good or not. And the changing of the color, it's good. We know that we done this part, right? Now, let's just click in here, this part. We don't need to fracture it a lot, so click on New create its geometry collection, disruption folder, JC inside idle window, head create geometry collection. This time, two by two is more than enough for minimum size per cluster, a maximum one, two, by five, I think that's better because it's wood, right? Head fracture and that I think is good. No, it is six part. It's more than enough. Let's just do this one. Again, it should be the same, click on New and create its geometry collection. It should be in middle window, head create geometry collection. Head fracture, you don't need to change anything because it is wood, should be the same as this one. Click on this one. Again, this one, create a new. And in here, we need to put it in GC middle window. This is really important to be organized. Head fracture and that's it. We've done this as well. Click on this one, and again, click on New. You can see it is repetitive, but we should do it together. He create geometry, head fracture, that's more than enough. And this middle part in here, again, we need to do that as well, he create and put it in middle window, he create geometry, fracture. That's it. This is a small part in here. And should create that as well. Put it in GC, middle window, head create and head fracture, and this part again, head new can see this repetitive, can just ignore this part. Let create geometry collection, head fracture. That's good. This part we want to do. Click on New collapse this asset, for example, put it on middle window and fracture, right? This part, you can see it is a little bit big, so we need to fracture it more, click on New and in here, put it in middle window, create geometry. This time, we want to increase this two by eight, for example, and this one, maximum size per cluster. Let's just put it on 15. Head fracture, and that I think looks good. Now, let's see. This part, we didn't done it. Click on New, claps the asset and in here, put it in middle window. And two by two, and this 16 maybe head fracture. That's more than enough. No, let's just do this upper part like this. This is big, right? So we need to fracture it more. Click on New, collapse this asset, GC middle window, create geometry collection. And this time, we want to increase it eight by 82 to 30 maybe or five. So we have more fracture, head fracture, 137 it's more than enough, right? Now, we have a little bit part at top here. We want to do that as well. Click on New collapse this asset, put it on middle window, head, create geometry. We don't need to be this much. Maybe three by three for this one, five to eight for this one, head fracture. That's more than enough. Now the window in here, the woods, first, let's just do the woods. Click on New collapse the asset, put it in middle window, create geometry there, and three by three is good. Five by eight is good. Let's just fracture it this way and click on this one, no, create new collapse the asset, put it on middle window, create geometry, head fracture. This frame of the window, again, we should create it for that as well, put on middle window, head create geometry collection, and that I think is good as well. No, we done everything. Just the glasses is there. Let's do the glasses in next video. 31. 29 Fracture glasses: No, let's just do the glasses. It's no different. I just wanted to create another video for glasses. So for doing that, let's just start from down here, right? Click on this one. You can see, click on New. Again, we want to put it in the GC folder, middle window because we want to select everything, drag and drop, and put it in our sin. Create geometry collection. And in here, this amount, I think for the glass is more than enough, head fracture, that's good. 17. That looks awesome. Again, for this one, click on New. You can see we are not doing anything new. Head create geometry, head fracture, and we want to do it for this one, head new asset GC, middle window, create geometry collection, head fracture 16, that's good. Let's just go up withholding right most button and head E to go up, right? With the middle most, we can change the camera speed so we can go up slowly like this. You can see. With DNA, we can go left and right. Again, let's create geometry collection for this one. Again, create geometry collection, head fracture, go left. Want to do this one, click on new. That in GC folder, middle window, head create geometry collection, head fracture. That's good. For this one, again, click on new, you can see this repetitive. You can just ignore DCI do completely. He create geometry collection, head fracture. It's just head E to go up, click on this one, head Nu, put it on GC, middle window, head create geometry collection, head fracture. Go right for this one, click on N. Class this asset, go to GC, go to Middle Window, create geometry collection, head fracture. Sometimes we can miss something, but we can go back to it, right? It will be easy. Now, again, this one, we want to put it in middle window, create geometry collection, head fracture. No, we've done this part, but we need to go up for these two over here. Go down for this one, click on, class this asset, go to GC, put it on middle Window and that's it, head fracture for this one as well, we want to do the same. It is the last one. Let's just put it in here, create geometry collection, head fracture. That's it. We fracture everything. Oh, let's just see it, right? If you run over game, you can see how it's collapsing. That looks awesome. I want to go back to selection mode. And let's just search in here for GC underscore to select all of the GCs, right. And after that in here, we don't want to show the bones, so don't show the bones. And for you to see this, let's just run over game, you can see how it's collapsing. Of course, the rotation of it is not good. So let's just get our player start and put it over here, maybe, right over here. So it will face there so you can see it better runaway game. No, you can see everything is collapsing and we can show it to destroy it. And if you want something to break more, you can change the damage threshold. Can see it. That looks awesome. Let's just look at it one more time. The reason that it's collapsing it's because it doesn't have any anchor point and the weight of them, it's destroying them. So we need some anchor point. No, let's just go for the interior. 32. 30 Fracture interior: Let's just do the interior. Go to Content drawer, go to Asset aesttic Building SFG meshes interior. Just select all of them, drag and drop, put it on over scene. This is bring you to so we can destroy it, as well. First, this metal part, what I want to do, I want to go to fracture, and in here, click on New. This time we want to go to GC and create another folder, and I want to call it interior and put the geometry collection there. And this time, I want to use cluster and this much is a lot. Let's just change it to two by two. And these two by four, maybe, right? That's it. Head fractured. There's just 13 part of it, right? That's cool. This part like on new. Put it on GC interior, create geometry collection. This time, we want to increase that to ten by ten, something crazy, right? And minimum size per cluster, eight by 40 maybe something a lot fractured and that's it. 194 for this small part. This part at the bottom, let's just click on it. Again, click on New. And in here, put it on interior, create geometry collection. I don't want it to be this much three by three maybe ten. This is just testing what looks better, right? You can do whatever you want. Head fracture, and that's it. We have everything. Let's just go back to selection and select everything, get rid of all of these colors, right, by going in here and don't show the bone color. Now, if you run over game, you can see when it hit the ground, how it looks like that awesome, right? We can look at it as well and destroy it. That's awesome. We are destroying everything. 33. 31 Creating bulding part01: Know what you want to do. First, clean up over level. We can do it in here, let's just search for GC. And all the GC that has building inside it, I want to delete it. I don't want to delete the basic stuff. You can see the basic stuff is good here. In future, maybe you want to test with them, so I will leave it there. Now, let's just create or building over here, right? Let's see how easy we can do it. If we go to Content drawer no, if you go to GC folder, we have corner wall, right? We can grab these two. You can see these are geometry collections. So let's just drag and drop, put it over here, right? Now, with that, what I want to do I want to create a folder. So select both of them. Click on this folder and it will put it in this folder. I want to call it building, right? And all the building stuff will be here. But again, I want to select both of them, click on folder again to create a folder. And I want to call this one corner wall, right? And the lighting is here, and all the rest, I want to put it inside another folder, and I want to call it basis, right? So we should be organized because we have lots of things to add over here, right? No, with that, what I want to do I want to add the middle window, right? Make sure you save everything. Nothing is saved. Because Ao engine can crash at any time, select everything over here, and put this over here. And right off the bat, what I want, do I want to put it in a folder before moving it at all. So click on this, so it will put it in a folder, and I want to call it middle window 01, right, because we want to have multiple of them, right? Now, we want to position it, right? For positioning them, I want to click on this button, right, so I can see it in all direction. I can head F, so it will go there and you can see it over here. For this part that is in front of it at right plane right we can just drag and put it in here inside, and you can see the changes over here. We can see a top side. We need to bring it inside like this and zoom in here a little bit, go close. You can see this part is not good, so we need to bring it inside as well. And that I think is good, right? That's good positioning. Everything looks awesome. Know what we need. We can just click in here to maximize this and you can see there is no gap. And we can click away now. You can see there is no gap, and it looks awesome. Now for the middle wall. So in here, go to middle wall, select both of these withholding control, selecting both of these. Put it over here, right. Again, click on this and go at top side and put it at roughly good position. We will zoom to see if it's good or not. We can unzoom a little bit this, and this should be on one line like this. And let's just zoom in here a little bit to see if there is any gap. You can see the gap. We can bring it inside a little bit to see if it looks good. I think that looks awesome. You can see it's on one play as well. No, we did one part, right? That looks awesome. Again, let's just click in here, Run over again, and you can see it get destroyed and it looks awesome. When we add the anchor point, it looks much better. We did this part. I want to do it in multiple videos so you can reference to it, right? No, I will see you in next video. 34. 32 Creating building part02: Now let's just continue creating over building. In here, we did some part of it. Before doing anything else, I want to select both of these, create a new folder, and I want to call it middle wall, 01, right. So we will organize and we can put it in building. But right now, let's just not do it for no, let's just leave it like this. Now, this part, we want to do it the same. So let's just go back in middle window, again, select everything, put it in here, click on this over here. And no go to top can see we want to bring it like this to be aligned with this one, we can zoom a little bit. So we see what we are doing, bring it inside. And in here, we can zoom a little bit to see if it looks good or not. I think it looks awesome and the positioning of it is good, and it is aligned. That's good. No next thing, again, let me click in here. We want another one of this middle wall, right? But before doing that, I want to click in here and call this one middle window 02, right to be organized. No next thing, we need another one of this middle wall right there. Again, click in here to position a good. We can bring it over here. It should be aligned with this one. So let me bring it closer like this, not align. I should go back a little bit, and I think that's good. Should bring it inside a little bit. Now, we should go here to see if everything is good. Yeah, I think that looks good. We can put these two in a folder as well. So click on New folder and I want to call it middle wall 02, right? And that's it. Know what I want to do. I want to add another one of these. You can see take lots of time to create these kind of buildings. But this is how we should do it, right? Put this over here, click in here, and position it like this. Bring it over here to be aligned with this one, right? Bring it over here. I think that's good. We should zoom in here a little bit to see if everything is good, and I think that's good. No next thing, we need another one of those corners because this part of it, I think is good. One of these corners should be derno. So let's just go here and corner wall, select both of these, put it over here. But this time, we want to rotate it, right? So head E, so you can rotate it. For the rotation, I want to change these 245 degrees, so it will be easier to rotate it like this, rotate it one more time, and that's it. No, we can go to that top view to put it at the right position headw so you can change the position of it. No, we should see this one to align this one with it. Go inside, and in here, let's just look at it. I think that looks awesome, and we create one side of it, right? You can see we did create one side of it. And now, let's just test that out in here and run our game. You can see everything is collapsing, and that looks awesome. That is working fine. When we put Anchor point, it looks much better as 35. 33 Creating building part03: Before moving on, this corner wall, I want to put it inside another folder. So click in here. I want to call it corner wall, 02, right, and all the rest, it's another middle window, middle window, three, right? So click on folder, middle window 03, right? Everything is organized. That looks awesome. Now with that done, we want to duplicate this for the sides, right? So let's see if we can do that. Click on everything like this. Like this, right, click on one of them, select all the descendant, right? And know it's the time that all of these organizing folders will collapse a little bit because it will create it in those folder, right? But the good thing about it, we can grab all of this and know because we was organized, we can create another folder for all of this. And I want to call this side 01. Right? No, all of this part is inside this love. We can just delete these one. We don't need them. And this one and this one, the buildings we want it, right? Now inside this side one, we can right, click on it, go to select all the descendant, right? And now we can duplicate it, right? So hold out, duplicate like this. And before doing anything, click on New folder again and call it site 02, right? That's it. It will be inside the side 01. That's okay. We will fix that. So in here, we can select everything inside one like this holding shift, select the first one. And while we hold in shift, select the last one, create a new folder. I want to call it site 01 again. And this side 01 that we have in here, we can call it building, right? We will do this kind of stuff a lot. B ding because we don't want to lose be organized, right? At some point, you may say, why you are not using level instances and blueprints and all of that, because we are using geometry collection and doing it with those after that for coding it, it won't be easy to do. It will be much more harder. So this way, we should work just with geometry collection. We shouldn't put it in level instances, right? So in here, the side two, I want to right click on it, head select all the descendant, I want to rotate it, right? So like this, we rotated 90 degree. That's cool, right. Now with that done, we want to position it close to there, right? And because we have this corner in here, we can just click on this corner, delete it, right? And again, the side too, right click on it, go to select all the descendant. Now, we can click in here and put it on right spot. Of course, it's not that easy, but let's just go inside like this on that right. And in here, can see I can bring it inside like this and bring it inside like this. Now let's just go and check it out if it's okay or not. And I think there is no gap in here, so everything is good. One other side, we done it, right? No, just click in here, click away, right? And now, you can see everything looks awesome. Everything looks beautiful. And we have two sides of the building. We have two more, right? There we can just copy and paste all of these and do this part, but I want to have the sides correctly, right? No, it's easier to work with side one, side, two, side, three, side four, right? It's easier this way. No, we done two side, we need to do two more side. We will do it in next 36. 34 Creating building part04: No, let's just do the other side. So for doing that, I want to get the side two, right click on it, click on select all the descendant, and hold out and drag so we create a copy of it. And after that, without doing anything else, click on, create a new folder for it. I want to call it side 03, right? And with that, right click on it, go to move two, right, and move it into the building folder, right? Now we have side two and side three. That's awesome, right? Now, with that, we want to rotate it. So head E, so you can rotate it like this, 90 degree. And we want to position it roughly at the good spot like this. And after that, we can go to the top view, right? So we can position it better like this, bring it down like this. And in here, let's just zoom to see if it as any gaps or not, I think that looks awesome. Perfect, right? There is no gap in here, so that's good. And if everything is good, we can just select all of these and put it over here, copy it, and it should connect these two together. But if we didn't position it good, we have a problem, but because we did put the sides inside its folder, we can reposition them really easy, right? So click in here so we can see everything. Now we want to duplicate this one more time. So hold out, duplicate, right? By drag and drop in. I did call it side four, so that's good, right? No, with that, we need to position them, rotate them 90 degree like this, position them roughly like this. And what we want to do in this side four, we need to click on this one, deleted, click on this one, deleted, and right click on side four, select all the descendant, right? And now we need to position them right like this. After that, we can go to top a clicking in here and position it correctly. Over here, bring it inside, and I think that's good, but let's just zoom in here a little bit to see if there is any gap. This time is good. And this one, you can see it. It is a lot inside. So what we can do, let's just bring it inside a little bit, like this. I shouldn't be this much inside. This part, again, you can see that doesn't look good. There is no gap. A little bit, bring it this way. Of course, nobody noticed this part. I want it to be perfect. Now, let's look at this part. Yeah, that's not good. This part is good, but this part is not good. So that's why I want to move the side tree. Let's just go up and choose the side tree. So right click on side tree, go to select all the descendant, right? And on this top part, I want to see, you can see these curve lines in here. I want to see it over here as well. So let's just bring it outside a little bit, and no we can see it. Let's just go this way. We can see it over here. And this way, we can see it. There is no gap as well. So everything is good no, right? All the sides are okay. We can select the way and test that with NO. Click in here. And if you click away, you can see that looks awesome. Perfect. Let's just run we game and you can see the building will be collapsed, and that looks awesome. Now, next thing we need a roof. Let's see how we can create a roof next to 37. 35 Creating roof top: No, let's just create the rooftop. For doing that, go to Content drawer, go to GC, go to interior, select everything. R and drop it, put it on or level. And in here you can see we have some parts. If you bring it up, you can see at beneath it. Let's see it. You can see for the rooftop, it's okay, right? No, we have one metal part that should be on other sides as well. So select it. We want to duplicate it, hold out to duplicate like this and head E so you can rotate, rotate 90 degrees, head D so you can move it and position it real good in here. And it's not okay right now. Of course, you can change the step. Just clicking in here, you can change the step when you are moving the stuff, right? So, no, with that, we need to duplicate it one more time for this side. And with that, let's just head E so we can rotate at 90 degree head W so we can move it like this and go close so we can see if you position it correctly. Yeah, everything is good. No holdout, duplicate it one more time, head E, so you can rotate it 90 degree head W so you can move it. No, let's just put it over here, and I think that's good positioning. Cool. No, I want to select all of them and change the Z of them to zero to be at bottom. It's easier to work with like this. And no, I want to duplicate this whole thing. But before doing that, I want to put all of these inside the new folder. So with all of them selected, I want to click on New folder, and I want to call it roof part 01, right? And no, we want to duplicate it. So select everything, hold out, duplicate, right? And you can see, sometimes it's automatically create a new folder and name it correctly. So that's awesome to have, right? Now, this one, we want to connect it to this one, so we need to delete this one in here, right? Now, again, we can just right click on the rooftop number two and select all the descendant and position it really good. Just bring it close like this. Now, let's just zoom. You can see there is a gap. Bring it inside a little bit. You don't need to be that perfect, but yeah, it looks much better this way. Now, we have rooftop to select it. Hold on, duplicate it one more time. And no, let's just position it good in here. Without selecting anything, create a new folder for that it is Roof part 03, right? And with that done, I want to right click, go to move two and put it on building. Cool. And these two rooftop, part one and Roof part two. I want to right click on them, go to move two and put it on building as well. No, one part of it is finished, right? No, let's collapse everything. We want to select all of them, right click on one of them, go to select and select all the descendant. Cool. No, we want to bring it inside and bring it up after that and position it to see if everything fit or not. You don't need to have a perfect alignment in here because it will be destroyed, right? Oh, let's just put it over here, bring it over here. The important thing is that this part, right? This part should be aligned correctly. Like this, I think is looking good. It's a little bit up, so we need to bring it down a little bit. Bring it like this in here. And now we can position it better. We can bring it outside a little bit more. Go here to see everything is okay or not, but there will be some overlapping. It's okay. Cool. Everything is at right position. Cool. Now with that done, we can put all of this inside another folder, right? Because we want to duplicate it three time. So with everything selected, click on new folder, and I want to call it proof. Top 01. This time, I did call it rooftop and let me go up and delete those roof part. We don't need them anymore. We just use them, right? And with that, I want to put the rooftop, right click on it, go to move two and put it in building, right? Cool. Now, we want to duplicate it some more time to create a roof. So for doing that, right click, go to select all the descendant and no holdout drag and drop to create copy of it, right? And right off the without positioning them, I want to create a new folder and I want to call it roof. Top 02, right, right click on it, go to move two because you want it to be organized. Put it in building. Cool. Now in this rooftop two, we don't need this iron in here. We don't need this metal over here, right? Now with those deleted, we can just right click of roof top two, go to select all the descendant. No, we can position it good. Let's just go here, see if you are positioning it good or not and get inside like this. Little bit more. That's it. Now, we have the third one. We need to duplicate it one more time. So hold out in here, dragon it up, create a copy of it. This time we can position it before moving it in new folder. So let's just position it good in here. That's it. And we can put it on new folder, want to call it roof top 03, right? Right click on it. Go to move two and put it in building. No with that done, you can see the alignment of them. These parts are not that good. So we need to select everything and move them a little bit. So this and this right click on one of them, go to select all the descendant. Now with that done, let's just position it good in this way, as well. And I think that's good, right? This part is positioning good. This part is positioning good as well. No, over rooftop is finished and everything is aligned, right? Cool. We have the rooftop. Make sure you save every 38. 36 Roof gaps: One problem that we have our rooftop, you can see there are some parts that are far away. How we can fix that it's matter of positioning things and designing things for this part, for example. Or we can just click on here, hold out, duplicate it, and create another metal and position it. We're here to fill up these gaps, right? We can do multiple oven just by holding control and holding Alt and duplicating them, and position them in here. We can do it for this line as well. Hold control, select this one, this one, and this one, hold out, duplicate them, and position them good like this. Now, for this part, again, click in here, hold controls like this one and this one, hold out and drag and drop drag. So you duplicate it with holding Alt. No position it good. Now in here, again, I want to select this one, hold controls, like all three, hold out now for duplicating them, and position them, right? That I think looks good, right? Or it is too inside. We can bring it outside a little bit, and that's good. You know, our rooftop is good and finished 39. 37 Damage threshold: Know that our building is finished, we need to change the damage threshold of the things that is inside it. So, for example, these glasses needs to be broken with less forces, right? So for doing that, I want to go to Outliner and in here, search for glass, okay? Whatever glass that we have in here, Control A to select all of them, right? You can see all the glasses will be selected, and you can see it over here. All the glasses is selected. Go to GC, go to damage threshold, and I want to divide them by 20. So it will shatter much faster. So divide all of them by 20, right? And know with thatt, if you run over game, the glasses will shatter much faster and easier, right? Of course, everything is shattering, but you will see the difference when we are destroying stuff. Now with that done, we have woods as well. Now for the woods. Let's see what is the difference between the woods. If you go to middle window, you can see all the woods are in the middle window, and they have window inside it. You can see there is window inside it. And if I go here, there is no window in this one, there is no window in this one. So in here, if we search for Window and select everything with Control A, no, you can see all of the wood is selected. Now with that done, go to GC, go to damage threshold. You can see it has multiple value on the first reset, all of them, right. And after that, go here and divide it by 15 maybe, right? To make it less resistance to the force. Okay? Divide this one by 15. You decide what value you want to divide or multiply, right? Concrete should have less force needed for it to be destroyed rather than this metal. But I think just with that, it does look good. If you run over game, again, you won't see not much of a difference, but at future, you will see it looks much better with anchor point. Now, the glasses will shatter much easier and woods will resist more, and the concrete will resist more than all of them. That looks good. 40. 38 Convert building to blueprint: No, we have we're building with the right damage threshold for everything, right? But no, we want to add anchor point. Let's see how we can do that. For doing that, there is a couple of ways. For example, let's say we want to add anchor point. So go to destruction folder, go to asset fields, and add anchor point drag and drop an anchor point in here. We want to make the size like this bigger, like this, bring it up. Like this, of course, I need to bring it. Make it more smaller like this, right? So know what you want to do whatever that this anchor point touch. We want to add that anchor point to its initialized field. For example, this one, holding control, select this one, this one, this one, this one, this one, right, and this one, this one, and this middle part as well, right? Select all of them one by one and go to initialize field and add them there, right? But this will take too much time to optimize ways to do it like this. But it will be like 40 hour course because we have lots of things in here, and we want to add lots of anchor field. It's not just once for the columns, right? We want to do for this wood, as well. We want to do it for this wood as well. We want to do it for this wood as well. We want to do it for all of the metal part as well. So we have lots of them. It will take 40 hours to finish this course, right? We don't want to do it like that. Other way that we can do it, we can tell it whatever that this anchor field is overlapping with, take them and add this anchor field as their initialized field initialization fields, right? But right now, there is no good node for doing that. Maybe they added in future, but right now, there is no option for that. I did work on some workaround for this to add some box collision and all of that to this field. But again, the problem with it is that whenever we use overlapping actors, it will crash on your engine, right? So that's why we can't use that as well. But the best way that I found that it's easier than all of the ways is by doing it with blueprint. So let's just delete this what we want to do we want to select everything. So go to Building, make sure you right click on it, select all the descendant, know everything for our building is selected. Hold on. I want to duplicate it because maybe you make a mistake. We don't want to delete that. And with that, we want to click on New folder to create a new folder and I want to call it main build ding, main Building, right? And inside this main building, right, click on it. Go to select select all the descendant, know that everything is selected. Go to this icon and convert the selection to blueprint class. Click in here. Now, it will tell you, do you want to create it as child actors or harvest components? If you want to edit our building later, it's better to click on Harvest components. So it will harvest everything for us, right? Next, the parent class, what do you want to choose? The actor is more than enough, but if you want to put it in whatever you can do that, the actor is more than enough. And for the naming, I want to call it BP. Destructb building destructible building BP for blueprint. No, it will tell you where do you want to save it. So click in here, and I want to create a new folder inside Disruction folder, and I want to call it blueprints. So all of our blueprints will be here, head o, and no head select. It will convert it to a blueprint class. You can see? No, we can edit things in here and everything seems good. But we are in a blueprint. It's faster to work with it. And no with that inside this blueprint, we can add initialize field to it. Let's see how we can do that. 41. 39 Adding ancher fileds: Now, let's see how we can add anchor points really fast without going through all of these geometry collection to add to them one by one, right? For doing that, you can see all the geometry collection is as a child of shared root. I want to name this shared root to building. After that, I want to click on this building SM component and click on AD and create another SM component. This SM component is just for organizing the stuff. This one, I want to call it GC. So all the geometry collection will be inside this GC, right? So let's just select everything and deselect the GC and let's just go up and deselect everything else. Just the geometry collection will be selected. And what I want to do, I want to put them all of these geometry collection in as a child of or GC scene component. So dragon drop, put it there. Nothing will change. We will be just more organized to work with. Now with that done, you can see nothing is changed, but we are more organized. With that, click on the building, add another scene component. And this one, I want to call it anchor field, AF for anchor field, right? No, let me collapse all of these. You can see. We have one SM component as a parent of all of the geometry collection that we call a GC, and we have AF for anchor field. No, let's just add anchor field. For doing that, go to destruction folder assets field, and we want to add a anchor field to this anchor filled in here. Again, it will expand everything, but you can see the anchor filled in here. It is at middle in here. So first thing first, let's just do some part. If we bring it outside, we will duplicate it a lot. For example, in here, what I want to do, I want to put it for this column, right, and make it bigger. So it on our keyboard to make it bigger so we can see it, make it bigger this way. We want to bring it down a little bit and make it bigger this way as well. It will be from middle. So let's just put it on middle like this and that we make it bigger and position it. This positioning stuff take lots of time. But if you put enough time to it, it will look much better. Or project will looks much better. That's it. And now you can see we have an anchor field that we can use to grab all of this stuff from falling apart. I want to make it bigger this way, as well. And this way is good. I think we will change the size of it later. But for now, I think it looks good. You can see it is bigger because we want to overlap other stuff as well. Now with that done, I want to click in here, Control D to duplicate it. You can see it will create another one. This one, I want to use it for this one. But this one, we want to make it smaller. So smaller this way. Like this and change its position. So it is at middle. If you go inside, it should overlap everything in here as well. No, with that on. Let's just duplicate it one more time. And in here, we want to use this one for this column in here. That's good. It's overlapping everything. No, I want to duplicate this first one, Control D to duplicate it. This one, we want to use it for this one over here because this needs a bigger one, right? That I think looks good. Let's just duplicate this 11 more time and put it for this one, like this. And I think that looks awesome. We need to position it a little bit better like this and know everything I think looks good. Now again, duplicate it one more time. This time, we want to use it for this column over here. Now, let's just bring this over here like this. Okay. We want to overlap everything so it feel protect all of these parts from destroying by itself, bring it a little bit outside as well, like this, and know all the corners are okay, what I want to do. I want to copy and paste this one, for example, click on this one. Control D to duplicate it. And this one, I want to use it for this middle part. Let's put it on middle like this. And let me put it over here and make it a little bit smaller. So head R so you can make it smaller, like this. In future, we will change that based on the result that we get. Let's just duplicate it again and use it for this column like this. And that's it. Now, for this part, I want to grab one of these on this part and Control D to duplicate it, right? And I want to go up so I can move it better. Put it for this one. You can see it's easier like this, everything good. Now for this one, I want to select it like this, head Control D to duplicate it and change its position until it's overlapping with everything in this side as well. Now, for this part, again, at this top side is easier. Click on this one, Control D to duplicate it again and put it on this side, right, like this. And now, we can grab this one. Control D to duplicate it and put it for this one, right? No all the columns are okay. So if we add all of these anchor fields to whatever that it is touching to whatever geometry collection initialized field, what will happen, it will protect these parts from falling down by itself. It's not enough. Just bear with me. So I will explain how you can automatic add them to the initialized field of the geometry collections. After that, we will add more anchor fields so it will protect all the parts. For example, if we leave it just like this, this part will fall down completely, right? Some of these glasses will fall down. Some of these glasses will fall down. So just with that, no, let's see how we can add all of these anchor fields that is inside this AF to all of the geometry collection that is inside this GC and next video 42. 40 Initilization fields: We did add some anchor fields to our building, but with it, if you run over game, nothing has happened. Before running our game, I want to click on the building, create a copy of the project because when we delete this building, we can't go back to it, right? So I want to just delete this building and delete all of these. And with that building deleted, let me delete the rest. We have a blueprint that it has over building. If you run over game, you can see it will be again destroyed like always, because we didn't add these anchor fields to these parts to its let me go down to initialization fields. We didn't add it, so that's why it's not working. Again, one way to do it, we can just click in here and select everything and add the initialized field to them, but it will take too much time. How we want to do it really fast, we can go to construction script and do it in here. So for doing that, we can get this AF, that all of the anchor fields are a child of this, and we can get the children component, get children component, right? And we can tell it to include all the descendants. So all the anchor fields, it will give us an array. We can just right click on it, promote it to variable and I want to call it anchors, right? That's it. We can just grab this construction, scrip to there. Now, all of these anchor fields will be saved inside this variable, right? Again, we want to get all of the geometry collections by getting all the children all the children's component of this GC scene component, right? And again, we want to include all the descendants, and we want to right click in here, promote a variable, I want to call it GCs with an S, right, DCs. So all the geometry collection will be here. And after collecting all of the anchor fields and the geometry collections, for all of these geometry collections that we gather over here, we want to add all of the anchor fields to its initialized field. And how we can do that, we can use for each loop, right, connect the execution pin to it. These construction scripts will happen whenever we head compile. That's why after this, every time that we had compile, it takes a little bit more time to do so, right? Know what will happen if we have ten geometry collection, this loop body will happen ten time and each time it will give us one of them, right? So first thing that we want to do, we want to get this array element, and we want to cast it to geometry collection component, right? With that, if it is a geometry collection component, we can get its initialization field. So search for now down, get initialization fields, and add the anchor fields to it. We don't want to just add one anchor field. We want to add all of the anchor fields. So how we can do that, we can get all of the anchor fields that we saved in here, again, use another for each loop, right, and connect execution, pin to it. And this will give us all of the anchor fields. And because all of the things that is inside the anchors array, Al engine doesn't know what it is. That's why we need to cast it to child actor component. First, Okay? First, we should do this. And after that, with this, we want to get the child actor, get the child actor. And with it, we can cast this two F is anchor field generic, cast two F is anchor field generic, right? So what this will give us, it will give us all of the anchor fields that are a child of this AF, right? And we want to add all of them to the initialization field that we geometry collection have. So in here, we can say at, right? And add this to it, it need execution pencil. Let's just give it that, and that's it. Now, let's just head compile. I will explain it one more time. You can see when I head compile, it takes more time to be compiled. Now, if you run our game, you can see our building is not destroyed by itself, but as you can see, the glasses and the woods will be destroyed. If you shoot at one thing, you can see it will be down. Shoot at this one, you can see it will be down. That looks awesome. Let me show you one more thing. If you go at top because we don't have any anchor field in here, when we go here and tell it to simulate, you can see this part will try to go down. Of course, it's facing like this and you can see, no, it did go down. You can see the glasses are down and everything is collapsing, right? But because these parts are inside the anchor field, that's why it won't collapse by its own. Now, let me explain this part more. What we wanted to do. Every geometry collection, we wanted to add anchor field to it, right? So in here, we should go down, go to initialization field and add all of the anchor fields to here by clicking in here and add anchor field to it, right? But in here, what we have done, we get all of geometry collection, and we cast it to geometry collection component, and we get the initialization field array, and we add all the anchor fields to it. That's what we have done in here. 43. 41 Anchor filed for windows Explaining: No, let's just add more anchor field. Let's just go here, go to viewport and what I want to do. I want to click on this one, claps this one, and let's see which one is it? This one. Control D to duplicate it. We need lots more. Bring it over here. We need to change the size. We can just do it like this. One in there and one is too much, 0.5 maybe, right. And with that, no, we can position it. I want to position it for this in here for this root that we can use it as column, right, and bring it inside. I want to change the position in each direction like three, right. It's too much this way. In wide direction, just one, I think is more than enough, and maybe 1.5 and bring it outside a little bit like this. So it will cover this glass over here and this glass down here and the wood in here as well. Now, we need to duplicate this one more time, control D to duplicate it, and now we can bring it to the right to protect this part. Again, control D to duplicate. You want to do it for this part down here. Let me go down to see if it supports everything, bring it down a little bit. Every time that we add something, it will compile automatically. That's why it takes a little bit time. Control D to duplicate. And this time, I want to bring it over here. No, the glasses shouldn't fall off at all. Let's just test. If you had compile, save, make sure you save always. And this side, let me see the player start. Where is it? Player start this way. So let me put the player start in that way, like this. So we can look at it, right? These glasses shouldn't fall off at all like this and bring this over here. Rotate it like this. I know if you run over again, you can see the glasses in here is okay. It's not moving until you shoot it, right? You can see. When we shoot it, it looks more natural, right? But these glasses up here, it's collapsing. So for fixing that, let you just go here. I want to duplicate this one, so control this to duplicate and bring this up. For these glasses that we have in here, just like this, bring it down a little bit, can bring it to the left. Just like that, it should protect the glass, and I want to add one more control D to duplicate. I want to put one on this side as well, like this. I'm recording and I'm doing this, as well. That's why the speed is not that good, but on your machine, it will be better. Head compile. No. Let's just look at it. Runo game. I know you can see This side is really okay. Everything looks awesome. Nothing is collapsing. Know what you want to do. We want to do the same that we done for this window. Do it for other windows as well. This is a repetitive mission, right? We need to do all of these for this part as well. 44. 42 Anchor filed for the rest of the windows Part01: No, let's just add the rest of the anchor point. So in here, I want to use Control D to duplicate, right, and put it over here. Zoom a little bit, so we can put it over here, duplicate one more time. Put it on this side, click on this one, duplicate and bring it over here. 42 be a little bit faster. I want to go here and tell it to change it to unlit. This way, it's a little bit faster. Duplicate this one, bring it to the left. That's it. Another thing that we can do to make it faster, we can go to Construction script and disconnect this one so it won't compile anything. And this should be a little bit faster as well. Control D to duplicate this one, bring it down. You can see, no, it is faster to do so. And click on this one, Control D to duplicate and bring it down here. And that's it. No, we should do this part, so Control D again. Sure, everything is okay. Control D to duplicate. I want to do this side like this and Control D to duplicate one more time. Bring it this side, Control D to duplicate one more time, bring it up here. Control D to duplicate one more time, bring it up here. Cool, right? Control D to duplicate one more time. Bring it up here now, like this. Control D to duplicate one more time, bring it over here. That's it. This part is finished. No, we want to do this part. So let's just get this one, control the to duplicate, bring it over here. Change the size to 0.5, right? And this one, two, maybe. And this one. No, with that, I think that's good. Can bring it over here and use it for this one. Cool. Control D to duplicate, bring it on this side. Maybe we need to bring it inside a little bit, as well, but it's okay on this side as well. It's too big, right? Control D to duplicate, bring it down. Control D to duplicate one more time, bring it over here. Control D to duplicate. We want to do it for this one. Control D to duplicate one more time. D, sizing the direction. I want to put it down 1.5 maybe, right, because it's too much right now. Control D to duplicate, bring it up. Control D to duplicate, bring it over here. And no this one over here. I'm using Control D to duplicating stuff, and that's it. Control D, bring it over here. At the end, we will test it to see if we did make any mistake with that done. Let's just go here, duplicate this one, Control D. It doesn't need to be perfect because the buildings in real life, it's not that perfect, right? So let me bring this down a little bit. That's good. Control D to duplicate, bring this over here. Now with that down. Control D to duplicate one more time, bring it over here. A little bit to the left, so it filled face everything. Control D duplicate one more time, bring it over here. Cool. Control D to duplicate one more time, bring it over here like this. Control D to duplicate and put it over here. Cool, right? Now, we should do this part. For this part, let me copy one of these. For example, this one, and use Control D to duplicate and bring it on this side like this and no we can position it. We get over here. Cool. Control D to duplicate, bring it over here. Control D to duplicate. You can see we are just duplicating and putting it in wherever we want. 45. 42 Anchor filed for the rest of the windows Part02: Control D to duplicate, bring it over here, and Control D to duplicate, bring it over here. Control D to duplicate, bring it over here. Now, this down part, L in here, control D to duplicate, bring it over here, down, so you can see if it's okay. Control D to duplicate, bring it down. Control D to duplicate one more time, bring it over here. Control D to duplicate one more time in here, Control D to duplicate and bring it over here. Control D to duplicate. Control D to duplicate. Control D to duplicate. Control D to duplicate for this side. Control D to duplicate, for this side. Control D to duplicate for this, Control D to duplicate. You can see with Control D and duplicating how easy it is. It doesn't need to be perfect. So in real life, nothing is perfect. Now, let's just copy and paste one of these, Control D to duplicate and put it for that side like this. Over here, bring it inside a little bit like this. And that I think is good. Control D to duplicate, bring it over here. Control D to duplicate, bring it over here as well. Control D to duplicate one more time, bring it over here. Control D to duplicate, bring it over here. It's almost finished, right? Control D to duplicate over here. Cool. Control D to duplicate, bring it down. And here, everything okay? Control D to duplicate. Bring it over here. Control D to duplicate, bring it down. Control D to duplicate one more time, bring it over here. Throw D to duplicate one more time, bring it over here. This time, let's just decrease this value to 0.6 because it will be easier. With this size to position aperture, Control D to duplicate. Control D to duplicate, bring it over here. Which was D to duplicate, bring it over here. Good. Control D to duplicate, bring it over here. Which one D to duplicate, bring it up. Control D to duplicate, bring it to the left. T D to duplicate, here, and that's it. Everything is finished. Know that everything is finished for the windows. Let's just go to construction script and connect it. This will take too much time. Head compiles. If you run over game, you can see some part of it is collapsing by its own. It was working before. Why it's not working now? If we go here, you can see first we are include all the descendant forgeting anchor fields and geometry collection. By checking this, it will create a bug. I will go through everything that is inside the geometry collection. I don't know what is the exact bug. But if you just don't include all the descendant all the descendant if you hover over it, it means grandchildren and great grandchildren. You can see it in description when you hover over it. We don't have any grandchildren in here. It's just all the descendant of it. There is nothing after GC or AF. Just the geometry collection. Just with that, if you head compile, no, it will be faster a little bit, if you run over game, you can see everything is good, but you can see some part of it, it's getting away like this. There is a problem. We will fix that. Now if you shoot here, you can see, I will delete that and you can see how it looks. If you shoot in here, no, you can see a problem. Just look at that. Window up there because it has a anchor field applied to it. That's why it is in the sky. This is first problem that we should fix. But this part that we have in here that it's collapsing, it's because some part of it, it's not inside this anchor field. So at some point, we need to increase the size of these anchor fields. So for example, this one, I want to make in the wide direction a little bit bigger, like 2.5, like this. Now with that done, if you go here and run our game, you can see that part is not breaking down anymore, it's not going down. But as you can see, the roof will go down. You can see the roof will go down. That's why it will break some part of it. If you go at top and in here, go and click on simulate, you can see this top part will go down and make the other part collapse sometimes as well. You can see right now there is no problem. Again, there is a problem in here, no problem in here, everything good. So this part have problem as well. We will fix all of these problems by making these bigger, and after that, we will go and create anchor point for the rooftop. See we can do that in 46. 43 Fix falling part: First problem that we have in here, some part it's falling down. So what I want to do I want to make this a little bit bigger in the y direction. This is good. Let's just click in here. Change this to 2.5. I think 2.5 is more than enough. Go here for this part, this in X direction, we should make it bigger in x direction, 2.5. You can see the direction is in here. A click in here, change this to 2.5. Now, let's just go on this side. In this side, we need to change it in the Y direction. So 2.5 for the Y direction, again click in here. And for the Y, 2.5, this should fix lots of problems. No, for this part, this is X, should change it to 2.5 and do it for this one, 2.5, and that's it. All the problems should be fixed. Let's just go to our level and run over again. You can see there is no falling part for you to see it better when you click in here, he simulate and go around it. You can see there is no falling part anymore, just the top of it, right? So I want to give you as a challenge to you. Create some anchor fields for top part. You try what you want to do, and we will do it in next video together. 47. 44 Roof anchor fields Part01: No, for the next part, we want to do the roof. So let's just go here and let's just do the roof. For the roof, let's just grab one of these. Control D to duplicate, and I want to change the size, for example, to tree maybe in Z direction and bring it up to look at it. Of course, it's better to disconnect this construction script when we are doing that. Viewpoint, this way is easier. Now with that done, the size in the wide direction, I want to decrease it to maybe two. That's good. Know what I want to do. I want to bring it in middle. Like this, I change the size in Z direction to two maybe because it's too much right now, and that's better. This one, I want to change the size in x direction to five maybe, and that's it. It is covering everything. It should cover this part, middle part as well. That's good, right? Now, with that done, I need to duplicate this control the duplicate and put this duplication over here. But this time, what I want to do I want to change the size in its direction back to three, right? It should be randomized. It shouldn't connect to everything. Maybe we can bring it a little bit this way as well. That's it. This side is finished. Control to duplicate this one. And let me bring this over here and over here, right? I think this way is better. We need to randomize a little bit, so it looks more natural. And this way, it should be connected to this one. So it's connected there. I didn't look good, right. And I want to duplicate this one, control D to duplicate, and bring it over here, and after that, bring it this side. This one should get the middle as well. So let's just bring it over here, middle a little bit, and bring it outside. Like this. So it grab the middle as well. That's it. This part is finished. Now, let's just duplicate this one more time. And I want to rotate this one. So at E, rotated 90 degree like this at W, so you can move it. I want to do it for this one, like this, bring it inside. I don't want to touch this one, so that's good. No, I want to duplicate this, control D to duplicate, and I want to put it on this side, like this, bring it over here. That I think looks good. It shouldn't be perfect, right? Now, again, I want to click on this one, Control to duplicate and bring it for this one. But this time, what I want to do I want to change the size in this direction, headR, you can change the size. For some reason, it's changing it in other site. Maybe we should click in here to go to local space and know we can increase it in this direction, right? Now it's working at W, so we can move it a little bit forward, so it will support the middle one. That I think is good. Now, control to duplicate one more time, bring it this site. We want to do it for this part. 48. 44 Roof anchor fields Part02: Like this, and it needs to touch this column as well. So put lets bring it so it will touch it a little bit. And it's not touching the middle part, so we should maybe make it bigger. So in each direction, we need to change it to five, right? No, it is touching it. Bring it bit to the right. And look at it, it's like it's not inside this one, so we need to bring it over here. Maybe just put this one to six, add more randomization to our building. That's much better to add more randomization to our anchor point, and our anchor point is inside this one as well. This part, I think this is touching this and touching this. Yeah, everything is good. No, we should go to construction Script, connect this to here and head compile. It will take a little bit time to get compiled, but it's just once. Now with that done, let's just go to our level. I want to use simulation to see if there is any problem, so simulate. Now, you can see nothing is happening, but if you go inside, you can see this part is falling down. So let's see how we can fix that, go to building, go to Viewport. Let's just go down to see if it's touching it. Yeah, it's not touching it. So these parts, we need to change in Z direction to trim maybe for all of them, or making it fast. Again, disconnect this, go to Viewport, select this one this time, change it to tree and change this one to tree as well. We can select all of them together like this. Select this one, this one, this one, and this one, and change in Z direction to tree. And that's it. Go to construction script, connect it like this, help compile now. And know if you go here, you can see it's not touching it completely, so we need to make it bigger. So again, disconnect this, go to Viewport, and for example, let's make this one bigger in what direction in its direction to six maybe. And with it, I think it's touching it. We need to bring it down a little bit, because if you go inside, you can see it's not touching that middle part. That's why it's going down. So just change this to 900, so it will go down a little bit. Again, change this one in x direction to six with that done, should be okay, this one, again, changing direction to six and bring it a little bit outside like this. Now, let's just go down to see if it's touching it or not. It's not completely touching it all of them, but I think that's okay. Let's just go back in here and connect it like this headcmple. We need to test a lot to see if there is any problem with our building. No, let's go to our level, run, simulate, and now you can see it will stay there. That's good. No, you can see none of the parts is falling down. Everything is okay. Let's just test it with APC, right? Can see shoot on here and everything is collapsing, cool. Look at this one. You see some parts it's up in the sky with base can see it. We show it better like this, you can see it. That doesn't look good. It is in the sky. What we can do about it, we should create a logic for destroying all the anchor fields that are up in a sky without any column connected to it, right? But just with that, you can see how it is looking like, right? So let's shoot. It's fun to work with it like this, but we will fix all of this problem. If you shoot over here, you can see this is in the sky without any base to be on it, right? Let's see what we can fix. 49. 45 Explain smart projectile: No one problem that we have is the way that we are destroying or building. So, for example, let's say we destroy this one, right, and we destroy this one as well, right? We head over here. So what will happen this field will be destroyed. This field will be destroyed, but the two field won't be destroyed. This two field that is protecting this window, is based on these columns, right? So whenever these two columns get to be destroyed, we should destroy these two as well, right? So if we hit this column, we want to say, if there is any field, anchor field close to it and overlapping with it, try to destroy that if it is above its position. For example, the position of this one is here. So if we had here, we want to check if there is a field that is overlapping with this field, and the height of it was higher, it means we need to destroy this one and go up. We need to destroy this one as well, because it is connected to this, and it is based on this, the ground that this metal is based on is this column, right? So if we destroy this column, this part should be destroyed. This field over here should be destroyed. This field should be destroyed, right, so it looks more natural. And for doing that, we can't just do it with this projectile. I don't want to change this projectile. That's why I want to go to APC blueprint and control D to duplicate this to create another projectile. And I want to call it APC smart projectile, right? No, with that, we can just close this one. I want to use this smart one. And in this smart one, I don't want to spawn the destroy field like this at all. I don't want to do this. I don't want to do all of this. What I want to do after span the sound at location, I want to destroy this, right? Destroy actor. That's it. With this, if we use it, let me go to the APC. Whenever we are firing our weapon, let me find it. We Zoom, this is fire. We want to spawn the smart one, right? BPAPC smart projectile. No with that done. The difference is that it apply some power, some explosion field, and after that, it will trigger it. After that, it will have some sound and niagara system, right? It won't destroy any anchor field. So let me run. And if you shoot in here, you can see, it's destroying a little bit of building, and it's not destroying the whole anchor field, right? The anchor field, how we want to destroy it, we want to destroy it in a smart way. So whenever we shoot at the bottom of this column, all of the top part, either it is in Anchor field or not, we want it to be destroyed as well. 50. 46 Apply destructable damage: Know, in aerial engine, we have a couple of ways that we can apply damage to something to decrease itself, to destroy it, or whatever, right? One of them is apply damage. One of them is apply radial damage. No, we want to create our own damage system. So I can just call it damage building, damage destructible or something, right? So for doing that, I need to use interfaces. Why I want to use interfaces? Because our destructible building knows about all the component inside it, knows about all the anchor field inside it, knows about all the geometry collection inside it. So inside the building, we decide if they hit us over here, what anchor field should be destroyed. For example, if we hit over here, this anchor field should be destroyed, and this top part anchor field should be destroyed as well, because this one and this one and this one is based on this column. And if there is no column, those should go down as well, right? So we want to do it inside or destructible building. But how we can let the destructible building know that we are hitting it, right? There is lots of way, but the easiest way is interfaces. For doing that, go to content drawer. I want to go to destruction folder, go to Blueprint. And in here, right click, go to Blueprint and in here, create a blueprint interface. And I want to call it BPI for Blueprint interface. Destrucb destructible, right? BPI destructible. And inside it, I want to create a function apply destructb damage, okay? Apply destructible damage. And for the input of it, I want to get where it did hit, right? So I want to call this one hit location, and the type of it, as you know, it should be vector. To tell building tell our destructible building where we did headed, right? Let's just head compile, save. And now we should go to destructible building, go to class setting. And in here inside interfaces, click on at and I want to search for BPI Destructb, right? With adding that in here, you can see inside the interfaces over here, we have applied destructible damage. Double click on it, and now you can see it did create a event for us inside or destructible building blueprint event graph, right? In here for just testing it, I want to use a print string. And I want to say destructible damage, right? That's it. Let's just put it over here. And no with that done. Let's just compile. We want to test if it is working, right? We have a event that we created with our interfaces. Let's see how we can call it. For calling it, I want to go to a Smart projectile. And in here, you can see this event hit gives us the other blueprint or actor that we are hitting that it caused us to stop, right? And inside that, we can check if it has apply destructible damage. We can check that, right? That's if it has it, it will run it, but if it doesn't have it, it won't run it at all. It will ignore it, right? It need execution pin. So let's just put it before this spawn FS field, hold control to gravel of this, put it over here, and connect it like this. It needs a head location. We can get the impact point over here and pass it to the head location. Know with that if this smart projectile hit anything, this will check if it has applied destructible damage event inside it. If it has it, it will pass the impact point as its head location. So with that, we know the location that we hit, right? No, let's just head compile and run, no let's just shoot. You can see it says destructible damage. And for you to see that this head location is working as well, let's just go to destructible building. Instead of just using prints sring what I want to do, I want to use the bake draw, for example, a sphere, right? And I want to change the color of it to red for the location. We can use this head location. For the radius, let's just use 120 for no, right? And the duration, let's just say five second and the thickness, let's just say ten so you can see it better. Head compile. I know if we go to our level and run wherever we head, you can see that red sphere will appear. So no overbuilding knows where we are heading, where we are trying to apply destructible damage. That's it. We want to use. 51. 47 Find touched anchor fields Part01: No, with the interface that we create, we know where exactly we are hitting, right? With this inside our building, we know where exactly the projectile head or building, right? I want to see what anchor fields it did touch. For doing that, I want to create some variables. So in here, create a variable, and I want to call it touched anchor fields. And the type of it, I want to change it to primitive component, the object reference, right? Go down, touched. Why primitive component because any of these anchor fields is just some primitive component, right? No, with that, I want to change the category of these two. Let's say, destructible, right? Just create a category for it. And I can collapse everything else because there is lots of them in here. And that's it. These two GC and anchors, it's for setup, right? So add a category for these two as well, and you can just drag and drop the two here. This two was for setup, but this touched anchor field is important for us. First thing that we want to do with this touched anchor field, we want to change it to array because our projectile can hit multiple anchor field at once. So for saving all of them, we need array. So click on it and go to value type and change it from single to array, right? First thing that we want to do, we want to grab this touched anchor field, get it, and clear it. Okay? Just say clear on it. So if there is anything in it from before, because we can hit multiple time on our building. So we clear it every time that we got hit, we got apply destructible damage, right? Know with that, I want to create a function for checking whichever anchor field we are touching or overlapping, right? So for doing that, I will go to function and create a function. And I want to call it find, touched, anchor field and that's it. This is our function. Let's just use it over here. Like this, grab it, put it over here, and no, let's just double click on it. As it's input, I want to create a input of type of vector. So click in here, change it to vector, and we should know the location that the projectile hit. So we need to pass it. I want to call it hit location, right. And with that done, I want to use a multi race multi trace, multi sphere trace by channel. With that, we want to check what or projectile touched. For the start and end, I want to use the head location, and for the radius, I want to use 120. You can decide what is your radius, explode radius as well, and for you to see it, I want to change the draw debug type for duration and duration by default is five. W that there, we don't need this draw debug sphere. We can just delete it and connect these two here. No, with this function, we need to pass the head location to it, right? Like this, pass the head location to it. Now, if you run over game, let's just go to our level and run our game and shoot over here, you can see it will show you where it's atting or building exactly. Those green squares, it will show you all the information. You can see green squares, it will tell us to where what location we are heating the stuff, right? And if you should, you can see it. Now, we are using multi sphere trace by channel inside this function, right? But not all of the things that this is heating, we want to destroy, right? We want to just check for fields. This is fine touch anchor fields. So we don't need everything. We need just the fields. So we should check if it is field, right? So for doing that, we can use for each loop on this array. So search for each loop. And each time it will give us a new object that it is hitting, right? And we can get that hit result and break it. If we go down, we can break the hit result. No, this will give us the component as well. This component is really important. So for you to see it that, I want to use a printer ringing here. Print a string and show this head component. Let's see what will give us, how we can find out if this multi sphere trace by channel if it is hitting anchor fields or not, which just compile 52. 47 Find touched anchor fields Part02: Go to our level and run over game and shoot. No, you can see. It says, at some point, it shows us some stuff, but it's going away. So let me go here and change it the duration to 20, for example, right? Now, with that, again, head compile and go to our level and run over game. No, let's just You can see we have anchor field generic 11, 391, 390, and 380. And it's three of them, we are hitting just with this, right? You can see it over here. No, with that done, let's just go here. Instead of saying get display name, I want to use something else. I want to say get object name, right? This get object name, it's easier to work with. Now, let's just show that, right? If we had compile no, and no, let's just run over game. If we shoot over here, you can see, it's a sphere sphere volume column. Box collision. If we head here, you can see there we are hitting like four or five, and you can see it says box collision. What is this box collision? Let me show it to you. If you open up the anchor field, let's just go to Asset fields and open up the anchor field, there is a box collision in here. Let me find it. There is a box collision in here. And where multi sphere trace is finding this, let me rename it to something else so you make sure that it is working. Let's just call it box collision, anchor. Field, right? Box collision anchor field. And no let's just head compile and no go to level and run over game. I know if you shoot where it says, Box collision anchor field. So with this box collision that is inside, we just comparing this name, we can find out if you are hitting an anchor field or not. Right? So for doing that, we can use this get object name and check it if it is equal exactly two. Let me copy it from over ankle field generic, this one, right? Head of two to rename it, control S, copy its name, and paste it over here, right? No, with the loop body, we want to use a branch and connect this to here. If it has box collision anchor field inside it, we know that it will go to true. And with that, we know that this component that we are hitting is just a anchor field. And with that, we can add it to our touched anchor field. So let's just grab or touched anchor field, and with that, we can add to it, right? What we can add to it can add this health component. So let's connect it like this to here. That's it. Now for you to see it better at the complete whenever this for each loop goes through all these Ohads result, we want to use a printer string. So search for printer string. And let's just show the anchor fields, get the anchor field touched anchor fields, and in here, get the number or length of them, right, and show it over here. That's it. Let's just head compile. And now go to our level and run over again. If we shoot in here, you can see it says Tree of the anchor field you are hitting. If we had here, it will say you hit two anchor field. Here, you can see it says you hit two anchor field. And if you hit here, you can see it says you hit one anchor field, and you can see it one If we head here, you can hit multiple one as well. You can see four, right? So, no, with this logic that we have, we are saving whatever anchor field that we are hitting with our projectile in radius of 120 inside this touched anchor field. And at the complete at the end, we are showing the length of it. I don't want to do that. That's just enough. 53. 48 Anchor field to be destroyed: Know what we have. We have all the anchor fields that our explosion or projectile is touching, right? And we did save it inside a array, and we call it touched anchor fields, right. So with that, what I want to do if you go to our view port in here, let's say we are heading in here, we're heading in here. So we touch this one and we want to check if this one touch other ones, this big anchor field is touching or overlapping with other ones, destroy them as well. So this one should be destroyed, this one should be destroyed, this one, this one, this one, and this one should be destroyed. This top one should be destroyed because all of them are connected to this column. Column in real world, if it's fall, whatever that is connected to it should fall as well. So now let's see how we can get those. For doing that, I want to go back to our event graph. We have all the touched anchor field, and we want to check. Whatever anchor field that is overlapping with this touched anchor field should collapse as well and should be destroyed. So for doing that, I want to duplicate this control de duplicate it, and I want to call it anchor fields. To be destroyed, right? Anchor field to be destroyed. So with this, we will save whatever anchor field that we should destroy. So we want to check all of these anchor field that or projectile touch and use a forage loop on it, right? And with this, first of all, all of the touched anchor field should be added to our anchor field to be destroyed. So we get this and we add all of these touched anchor field one by one to this one. And this time, I want to use add Unique and connect these to here and connect the anchor field to here. With this, whatever anchor field that we saved in here, we will save it inside the anchor field to be destroyed as well. But what is the difference between add Unique and add? What is the difference between them? This add unique check if this, for example, anchor field that you want to add is already there or not. If it's already there, it won't add it multiple time. So it will prevent some bugs, right? It will just add it once. So know what we want to do after this. Each one of these anchor fields that this forage loop will give us each one of them one by one. We want to check those to see what anchor field it's overlapping with. So we can get overlapping components, right? Again, this will give us an array of all the anchor fields that is overlapping with the anchor field that we did touch with or projectile, right? If we go to Viewport, let's say we hit this anchor field we get overlapped component, it will give us this one, this one, this one, this one, this one, this one, and this one. Whatever anchor field that is overlapping with this anchor field that we are checking it, right? So now, let's just go back to event graph in here. We want to loop through all the overlapping component with all the touched anchor fields and again, loop through them for each loop. Right, give it the execution pin. And we should check first its object name, get object name to see if it is anchor field or not. How we find it in find touched anchor field, we check if the object name was box collision anchor field. It means it is a anchor field, right? So let's just go back here. We want to check if this is equal exactly to the box collision anchor field, right? We can check it with a branch like this and connect the loop body to it, right? It is it, it means this overlapped component is a anchor field, right? So we can save it in anchor field to be destroyed. So in here, we get it and add it to it at unique this time as well like this at this one because it is anchor field that is overlapping with the anchor field that we touched, right? I know it's a little bit complex. You should watch it multiple time and think about it. It's really hard challenge after that, I want to add it to the touched anchor field, as well, okay? Like this, add Unique as well, so it won't add it multiple time. Which one? The one that is overlapping with the touched anchor field, right? Connected like this. Now with that done what will happen inside this anchor field to be destroyed will be saved whatever that is overlapping with this anchor field that we are hitting. So if you hit this one, it will save this anchor field, this anchor field, this anchor field, and this anchor field inside anchor field to be destroyed that is in here. Anchor field to be destroyed. No, we can destroy it, right? Let's first see how we can destroy it. And after that, we will add more cool logic to it. But before doing that, because this event hit can have multiple time on our building, that's why we need to clear every time this anchor field to be destroyed. Like we clear touched anchor field, right? We should clear it in here. So search for clear, connect execution, pin to it. And know with that, next video, I will show you how you can loop through all of these anchor fields to be destroyed and destroy them one by one. Let see we can do that next 54. 49 Destroy all overlapped anchor fields: Last with what we have done. Let me explain it one more time because I know it's getting really complex. In here, we get all the touched anchor field with or projectile. And for each one of them, we check whatever anchor field that is overlapping with those anchor fields, and we check. If it is anchor field, we save it to be destroyed, right? Inside this anchor field to be destroyed, right? Now, we want to see how we can destroy it. In here, whenever this complete happened, it means we did save all the anchor fields that we touched with our projectile and all the anchor fields that is overlapping with those touched anchor field with the projectile inside the anchor field to be destroyed, right? So in this complete everything to be destroyed will be saved in here, right? So we can use for each loop in here, for each loop, and this anchor field to be destroyed, anchor field to be destroyed, connected over here, and no, we can destroy it. And how we can destroy it, if you remember, in our projectile, we did use FS destroy Anchor field. So what we want to do for each one of these anchor field to be destroyed, we just spawn a actor from a class, and the class is FS Destroy Anchor field. And for the spawn transform, we can get the word transform of or anchor field that should be destroyed, right? And after this, we want to trigger this. If you remember we should say S trigger, S trigger, right? Now with that done, if we head compile and go to our level and test that, if we shoot down here, you can see all the anchor fields are being destroyed. If we shot here, you can see nothing will stay in the sky. Everything is connected to something. Then if you shoot in here, every anchor field will be destroyed. Nothing will stay on no base, no ground, right? Everything looks much better. Shoot in here. Again, you can see good. We don't need this multi sphere visualization when we shoot something. We don't need it. So let's just go to find touched anchor field. We had a multi sphere traced by channel, let's just change the drawib type to none, so it will be more clean to shoot at the stuff, right? At compile, go to level and run over game and shoot in here. Now, you can see, everything is destroying correctly. Shoot over here. Again, everything is destroying correctly. But let me show you a problem. If we run over game, and let's say we hit middle over here, right? You can see it's destroying all the columns, right? This is not okay. 55. 50 Make destruction more real: Now let's see how we can fix this problem that whenever we hit a small anchor field, it will destroy everything. So let me run and you can see if I shoot at middle of this. It will destroy everything. It shouldn't be like that. First thing that we should do, we should decrease the radius of our explosion, and how we can do that in find touch anchor point. It's 120 and it's too much. If we put it on 20, let's see what will happen if we had compile. And let's just go here and run. Now, if you shoot at middle, you can see, again, we are shooting at middle, but it's destroying everything, the column as well. Let's just test that one more time. If we shoot up here, you can see this time is working. But let's just test This one is working. That's good. All of a sudden, everything is working, but it shouldn't work. So let's just shoot at this one. You see, we are shooting at the window, but it's destroying everything. That shouldn't be happening. So how we can fix this, we should find out what you are hitting. If you are hitting a column, destroy everything. That's okay. But if you are not hitting a column, just destroy that anchor field, right? So for doing that, I want to go to our building in here, go to event graph in here. And after we found all of the touched anchor field, let me make some space in here. I want to create another function to check if you are hitting column or something else. So for doing that, I want to create another function, and I want to call it find anchor field. That was hit. Okay, or whatever you want to call it. Just with this, I want to loop through all of the touched anchor field, loop through them with each loop and connect the execution pinto it, right? Now, we are looping through all the anchor field, that or projectile or explosion hit, right? And with it, I want to check the scale. If we go to Vewport, you can see the columns has a bigger scale in Z direction. But other anchor fields, you can see the Z a scale of it is less. In here, Z scale of it is 0.5. Again, if you go here, you can see the Z scale of it is three. The columns, the Z scale of it is a lot, right? So with that, we can find out if you are hitting a column or not. So let's just go back in here. We want to get the word, get word a scale of it, right? And we want to check just the Z. So we can right click in here, split the stroke pin, and we want to check if it is more than, for example, let's say five. It means we are hitting column. Let's check it with the branch. And with that, let's connect the execution pin to it. If the Z scale of it is more than five, it means we are hitting column, right? So this true will happen, and in that case, we want to return the function with that anchor field, and how we can do that, we can just dig and drop this. So to create it and return it as output, right? I will create an output automatically, and we can tell it main anchor field that was hit, right? If it is false, we don't do anything, we will go to the next element, next anchor point, right? If this finished and we didn't return any anchor field to be destroyed, this complete will happen. And in this case, we want to return one of these touched anchor field. So grab it controversy Control V and get a copy of one of them. Which one the zero? That is the first thing that or projectile found touched, right? And we can pass that, right? Just with that, let's just head compile and go to our event graph and use this function that we create. Find anchor field that was hit with that's connected like this. And connect this to here. I want to promote this to a variable first like this. And let's just change the category of it to destructible, so it will be easier to find it. Main actor field that was hit, right, and connect the execution, pin to it. And after that, let me make some space. After that, we want to check if it is valid or not. So it is valid. And if it is valid, we go and try to destroy everything or just one thing, right? Now with that done. Before destroying everything, you know that with this, we will destroy all the anchor fields that should be destroyed, right? But before doing that, we need to check something with a branch. What we want to check, we want to check if this main anchor field that was hit was a column or not. Right? How we can find that out, it's easy. We can just get it over here, main anchor, field that was hit. And with that, we can get the word scale of it and right click on this scale, split a stroke, pin. Again, we want to check if the Z scale of it was bigger than five it means we are hitting column. In that case, you can destroy everything. But if we didn't hit the column, these falls will happen. And in this case, again, we want to destroy something, right? But in this case, we want to destroy just the anchor field that we hit. So select these three and control C Control V to paste it over here in case of falls. We want to just destroy the main anchor field that we hit, the anchor field that we hit, that is not a column, right? Just with that, let's just head compile and no go to our level if you run over game, and for example, let's over here. You can see it will destroy some anchor field, but it won't destroy everything you shoot in here. It will destroy something, but not everything. But if we hit the column, you can see everything will be collapsed. If we hit the roof, you can see what will happen. But if we hit the column, everything will collapse. If we hit the column, everything will collapse. In here, you shoot in here, it will destroy something, right. Yet in here, it will destroy something. But if we hit the column, it will destroy everything that is based on this column. That looks awesome. 56. 51 APC Engine sound: Know that we are destroying our building correctly. I want to add some sound to APC for its engine, right? Make sure before doing that, you save everything. And after that, go to Content drawer. Let's just open up the APC folder, AP BP APC, right. What I want to do, I want to add some sound, right? But what we want to add, let's just go back in here, right, click in here, create a new folder, and I want to call it audio, right? And in here, right click, go to audio and create a metasund source. I want to call it s engine, right? Do I click on it to open it. In here, we want to play a wave player, right. Use a wave player Mono is more than enough connected to Otwood so we can hear it. The wave asset that you want to play is engine idle, and we want it to be on loop. That's it. Make sure you save it and close it. No inside or BPA PC. I want to click on or mesh, click on AD and add a audio, right? And I want to call it engine audio or engine, right? The audio that you want to play is called Ms engine. Of course, I didn't call it right, so let's just go here, call it right. It should be like this, right? So that's good. Now, with that, if we go to our level and run over game, you can see there is some sound in here. But if we move, you can see the engine sound is not changing at all. That is a problem. What do you want to do to fix that, we want to change the pitch of sound or audio engine sound based on the speed or velocity of APC, right? So for doing that, I will get over engine audio, and in here, I want to set pitch multiplier to change the pitch of it on every tick, right? And how I want to change that, I want to get the velocity, the velocity of APC, and I want to get the length of it. So search for vector length XY, right? And based on this speed or velocity, we want to change the pitch. How we want to do that, we want to map it map range clamp. So for example, we say, if the SPD is zero, give me a value of one on output as the pitch like this. But if the speed or velocity is 5,000, give me a value of tree for the pitch. That's it. You can play with this value until you reach the result that you want. But if you run with him and move, no, you can see the engine sound sound. Much better. And if you starting here, no, you can see beat and thet Cool. That looks awesome. We did create really good game, congratulations.