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In this lecture, we're adding collision to our world and collision to our characters so that we can

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drop to the ground using gravity and then stand there and not fall over.

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So let's jump in and get started.

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I think it's time for us to pre-fab our players, so I'm going to jump in my assets directory, right

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click, create a folder and we will name this prefabs.

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It's good to have all these things as prefabs because if we want the player to go from level to level,

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we need to have one player prefab that we're using.

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So I'm going to open up prefabs folder, grab my player, just drop the player down here makes a prefab.

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Excellent.

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Now because we're going to be making some changes to the player as well in this video.

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So make sure you pay attention to whether you're working on the prefab or working on the instance or

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what you're working on.

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Just a note of that.

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Now let's turn our attention to the tile map itself.

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We want to add some collision on.

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There's a couple of nifty things we can do.

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But first of all, just a note that we can apply the collision to any of our particular tile maps.

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So eventually that three tile maps in our scene at the moment and see we can change it by either selecting

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along here or we can click on the object in the hierarchy itself.

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So we want to be putting the collision on platforms.

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So when the player is touching these platforms, the player lands on them and can jump on them, etc.

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Not on the background and not on the water.

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Maybe the water bit.

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Probably not for the moment, but definitely on the platform tile map.

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So while we've got that clicked in our inspector, I'm going to scroll down ad component.

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I'm going to start by adding a tile map collider to DX and that you see will add collision into all

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of our blocks, all of our tiles that we've placed in the scene.

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That's a good start.

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We could potentially finish at this.

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But there's one issue that I've found is if you scroll all the way in, all the way in, all the way

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in, we'll see how far it's actually going to let me scroll in here all the way in.

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You can see that there's a gap where you can't see, but there is a gap between this tile on the left

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and this tile on the right.

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The collision is this tiny little gap in there, and sometimes we trip on it.

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We can now foot stuck in it and things don't go so well.

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But there's a cool thing that tile map lets us do if we jump down into add component again, if we search

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for composite.

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Collider 2D, composite.

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Collider 2D, that allows us to join all these things together.

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So when we added the composite collider component, it's also added a rigid body.

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All we need to do here is set this to static because our world is not going to move.

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It's going to stay where it is, the platforms in the future.

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We might do some moving platforms, in which case we wouldn't do it as static.

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But for now all we're doing is just having it sitting there stationary, make it static, and then it's

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going to roll up rigid body to DX so it's not getting in the way under tile map.

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Collider 2D You can see that we've got a used by a composite.

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If we click on that, then our entire world is wrapped, our tile map is wrapped with our collision.

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I'm just going to turn off for a moment the tile renderer, just so you can see, we've got this green

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outline now that is our collision that goes around all of our tiles.

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And if we're to get there and paint using our rule tile, paint a new tile just in here, then you can

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see once again, I'll just hide my visualization.

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You can see that our collision responded to that and wrapped around in a really nice, dynamic way.

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Super handy.

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It couldn't be any easier than that, huh?

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Just very straightforward.

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Now, what we need to do is make it so that our player can actually go bump and fall and land.

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Because when we kick click play, he's just standing there doing not much, just floating in space.

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So I'm going to give this to you as a challenge.

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And that challenge is to make your player fall and land that make this even clearer.

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I'm going to grab the player, hit W and just put the player up in the world.

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So let's go dunk and then land on the platform, make your player fall in land.

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So figure out what components we need to add to the player.

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So when we push play, he falls and lands on the ground.

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And now a little bit of bonus points here.

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Figure out how we can ensure the player doesn't fall over, doesn't kind of slowly rotate and go up

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and land on his face, which can happen if we do things a particular way.

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So there's a challenge.

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Pause video.

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Take that one on.

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Okay.

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So there was a little bit of a clue in the sort of collider I'm going to be using on my player because

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I was talking about having it fall over.

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So I'm going to work directly on the prefab click my little arrow here.

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Now I'm in the prefab, I'm going to click on Add Component and we'll add a capsule collider make sure

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it's the two.

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RD So you don't sit there for a while saying, why isn't this working?

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Or do a little bit of editing on this?

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And it's a big round ball that's a little bit fatter than what Ginger is.

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I'm going to click on Edit Collider, grab the handles to the right and to the left and up and down.

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Just a little bit of finessing to cover most of the player, right?

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Happy with that?

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That's good.

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And click out of the edit.

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Collider Next, what we need to do to have our player actually respond to gravity and physics is what

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we need.

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Add a rigid body, so rigid body to DH and our rigid body to DX.

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Let's open that up.

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Have a look at it.

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Dynamic.

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Yes, because we want him to be moving around unlike our world, which is going to be static.

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And I'm going to find the constraints box in here because we've got a capsule collider and we've got

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this rounded bottom.

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There's the possibility that our player will slowly kind of go boom and roll onto his face because he's

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standing on this rounded edge, the rounded edge I like better than having the square collider or the

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rectangular collider because it doesn't have these sharp edges that can catch on things.

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It's got this nice rounded edge, smooth edge makes it easier to bounce around and do stuff.

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But I need to freeze the rotation on the Z axis so we can't accidentally roll forward onto our face.

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So I think that's all I need to do.

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Let's move back out of our player prefab click on play and our play should drop to the ground and they

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bump and land nicely and not roll over fall flat on his face.

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So there we go.

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Next stage in getting our player ready for running around and jumping and platforming.

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Good stuff.

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I'll see you in the next lecture.