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Hello, guys.

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In this video, we're going to make endless generation of the level parts.

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But before we do that, let me explain how it's going to work.

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So what I'm going to do now is I'm going to have a next spawn position somewhere here.

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Let me draw the x axis so we have a spawn position and we have the player and also we have the platform.

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And this platform will have the start point, start point and the end point.

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Now, whenever players are getting closer to this point, position will generate a platform and this

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position, the spawn position with it start point.

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So the platform will be generated like this and here is the start point and end point.

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And whenever this happens, we're going to take our spawn position and move it to the point of new platform.

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So in this case, whenever platform is generated, the spawn position will be moved to the end point,

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and whenever player gets closer to this spawn position, we're going to generate a new platform over

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here and move the spawn position to the end point of the next platform.

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And whenever a player getting closer to a spawn point again, we're going to generate new platform and

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dead point and again move the spawn position to the end of the platform.

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So in this case we're going to have endless generation as we want to.

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And because parts will be different, it will do the job we need to do.

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So let me demonstrate one more time.

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So we have the platform with the start point and the end point x axis, and we have spawn position right

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here.

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Whenever player gets closer to the spawn point, we're going to take the platform and spawn it over

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here.

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And then we take the spawn position and move it here.

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And when our player gets closer again to the spawn point, we're going to take another platform and

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generate it right here.

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And then we're going to move the second point somewhere there.

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So this is the purpose of this video.

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I hope that makes sense.

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If it's not, just stay with me, you'll see how it works and very simple to understand.

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So now you know how that's going to work.

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Let's prepare the platform.

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First, we're going to delete this background in a coin.

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We don't need it.

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And this we don't need it.

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We need on the platform.

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Let's create empty parent for this and name it as level part.

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We're going to reset position to zero zero.

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Make sure you do that.

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Then we're going to create empty object under it and I'm going to name it as start point.

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Let's give it the gizmos.

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Some colorful like that is.

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Okay, then let's duplicate this and make it end point.

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Now, whenever you make a level part like this, we're going to use start point, We're going to place

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it on the left and endpoint.

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We're going to place it on the right, and that's going to be our left and right borders that we use

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to know how long is the little part?

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All right.

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And we need to make sure both of them at the zero level, you'll know why very soon.

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And basically you can make your platforms inside of this area.

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You can resize them, you can duplicate place another one like that, and then you would need to jump

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from here to here to here to here.

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Always like that.

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Let's change the pivot.

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Let's keep one platform for now.

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Just like that, it can be anywhere.

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You just need to know that this is your, let's say, zero level of your level part.

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And if you place some platforms below is going to be like below zero level, but it will be easier to

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understand when we're going to actually create level parts entirely.

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For now, let's just prepare the system, okay?

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I want to make prefab out of this.

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And if you don't know what is prefab, don't worry about it.

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We're going to talk about this later in the course.

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For now, let's just create a folder name.

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It is a prefab and drag this level part inside.

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Now we can delete it from hierarchy and we have this part, very same part over here, and we can use

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it as a template to spawn same objects whenever we want to.

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So let's drag it here to the level generator like that and go inside of the script.

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We can change this to vector three.

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Next part position.

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I'm going to save it.

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I have a habit of saving everything all the time.

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It's a good habit, actually, I guess.

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Now, let's change this position to the next part position.

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So we're going to use this next power position to spawn our platform for the first time.

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And then we're going to assign next third position equals to the end point of each level part.

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And let's do that right now, just here below, I'm going to type next part position equals to new part

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dot find and find is used, as you can see, finds a child by name and returns it.

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So basically we can use it to find an object by its name.

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Let's do that and point dot position.

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So as I said, so as I said, we're going to spawn platforms at point every time and every time it's

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going to be a new endpoint.

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Let's go back to Unity and test this and click some mouse.

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Click, click.

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Okay, we're doing it.

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It is there now.

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As you can see, this is my first platform, and my second platform is bound at the endpoint.

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But it was found right at the center, like this is the center part of the platform and the endpoint

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and we need to spawn it like this.

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To fix that, we're going to go back to script and we're going to type next part position.

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Minus.

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Part dot find.

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Start point.

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Start point.

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Position.

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So we have an x axis.

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Yeah, this is the X and we have start point.

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And this one, let's say somewhere at minus five.

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And next per position we have at zero.

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So this is third point and this is the next part position.

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So what we're going to do here is we're doing next third position minus five, and that will be equals

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to minus five.

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So in the end, this value will be equal to minus five, which is start position.

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And basically this is what we're doing every time.

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Let's go and see this in action.

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I'm going to save it.

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Boom.

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Now I'm going to spawn it again.

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Boom.

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And we can see that now.

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Endpoint and start point and point and start point of the new one are at the same position.

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Very cool.

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Right.

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Now, what is important here not to mess up is the why of the platforms.

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So at the moment our platform has start point y zero and endpoint Y zero.

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This position is very important because if you place one of them higher or lower, you're going to have

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this effect.

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And I know this because I released this course before and now, as you might know, I don't know if

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I told you before, this is a rework of the course.

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All right.

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So basically, we had eight months of beta testing with other students.

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And I know that some of them had difficulties just like by the accident.

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They move this endpoint and then there is this kind of a behavior which is not okay, but I want to

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prevent it just in case.

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So let's go back to code and for this position we're going to use only X, So no matter how high or

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low, you're going to place your endpoint and start point, they're going to be spawned at the same

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level all the time.

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Let's do that.

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We can just type here vector to new position equals to new vector to and for the x, we're going to

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use this value over here and we're going to do this dot x.

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And that ex.

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And now after a comma, we need to put y and that's going to be zero.

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And then we're going to go here and type new position.

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So it's going to always have zero Y, so Y is always going to be equal to zero and there will be no

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offset.

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Even you accidentally move it.

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Yeah, let's go check that.

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So they are at the different level.

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But if I spot them.

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They're at the same level.

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Cool.

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I like it.

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Now, how do we make it spawn when we need to?

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First, we could spawn like one thousands of platforms at the beginning and just see how it works.

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But I want to make something better.

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I want to spawn the platforms when player get in close to the spawn position.

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So let's.

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Select this.

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Click and enter.

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Extract method and we're going to name it as generate.

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Platform.

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Yeah and I want to change condition here is going to be not if but while and in the parentheses let's

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check the distance right.

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What kind of distance do we need?

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Look here we have a span position somewhere, right?

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This one we have a strong position and player is getting close.

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So we need to know how close should be player before we spawn next platform.

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So basically we need this distance.

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So let's make that first serialize field private float distance to spawn.

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And while we are here, let's create serialize field, private float distance to delete.

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And of course we need reference to the player.

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So let's do this serialized field private transform player.

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Okay.

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Now, back in the parentheses, we're going to do vector two, the distance between player transform

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position.

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And.

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Next part position.

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And we're going to check if it is less than distance to spawn.

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Okay, that's good enough.

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Now, let's go back to Unity.

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We're going to select a level generator and drag our player over here.

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Then we need to make distance to spawn maybe 50 and distance to delete.

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Let's put 50.

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Now, the first part position is 000.

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So I want to place my player above that.

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Let me see somewhere.

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Okay, So zero here.

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Maybe a bit to the right and a bit to.

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Okay.

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He's not going to run fast enough, so I will give him a speed of 20.

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And let's go.

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Okay, so he spans the platforms.

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But that's because we don't have function for that yet.

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Okay, so the platforms are there.

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Let's delete them now.

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Let's go back.

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And how are we going to do that?

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First, we're going to create a function, of course, private void, delete, platform and position

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before our platforms respond as a child of a level generator.

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So we can use that.

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We can check if this level generator has any child and if it has some, then we can delete it.

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So that would be the first check.

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So let's do this.

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If transform child count bigger than zero, then if it is, we're going to grab the first child of the

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object like an angry parent who first comes to his eyes.

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We'll get some.

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So let's do that.

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Um.

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Transform.

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BART to delete equals to transform.

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Get child zero, which is the first one.

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And then we're going to check if player is far enough from this platform.

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So let's check if Victor to the distance between player transform position.

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And BART to delete.

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Sorry Bart to delete transform position.

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Then.

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Oh, wait.

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Yeah.

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Less than distance to delete.

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Then we're going to do this, Troy.

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Bar to delete game object.

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And let's do this check just before the generating delete delete platform.

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Very cool rate, very simple short script, but so effective.

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Let's go back.

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And I want to up on my platform and just start point here and end point somewhere here.

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And remember, we don't need to worry about why because we set it to zero.

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Okay.

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We have an issue with that because this sense is the same is getting deleted before it gets generated.

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So let's make distance to delete 100.

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I did some kind of a mistake there.

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I will see what is wrong.

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Oh, yeah.

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I am so stupid.

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Should be not less, but bigger, right?

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If distance is bigger, then we delete.

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Like if he is far enough.

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I don't know why.

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If bigger.

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Make sure you put here bigger.

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Sorry, I like the stools.

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Let's go back.

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Now it can be 50 again and doesn't matter.

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So respond.

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And let me change speed to 25 and let's go.

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So now parts behind the deleted and parts in front of generated.

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Very cool.

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I like it.

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And basically we have it and let's run her.

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We can place main camera under the player.

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And make it zero or zero.

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And now if you play the game.

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And let's run there.

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Then we're going to improve it and we're going to do that in the next video.

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For now, it's enough.

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Good job today, man.