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In this lecture, we're adding hazards.

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So when the player touches the spikes whomp, they trigger the death animation.

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Let's go through this process together as setting up our hazards tile map and giving it all the components

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and then making sure that we've got things ready to go.

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I'm going to give this to you as a series of little Q&A type quiz questions, micro challenges, if

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you will.

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We'll see how we go.

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So the first step, what do we need to do?

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First of all, actually to create ourselves a layer to put hazards on.

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Well, we need to jump over into toll map grid, right click, find 2D objects, tile map and then rectangular.

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We'll call this hazards tile map.

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Okay, that's the starting point.

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Now, what do we need to do in terms of layers when we create our new tile map?

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That's a good chance for you to pause the video and do those things if you want.

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That'd be cool.

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We can do it together and you can see if you can follow along while doing it the same time.

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I'm going to go out to layer on the hazards tile map, click on the default, their add layer and we'll

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call this hazards in our user layer 12.

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For me, I'm also going to add a sorting layer.

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Click on the plus button.

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These all call also hazards.

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We could probably do it at the same as enemies, but you might want the enemies to run in front or behind

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of the hazards.

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So we're going to have this zone layer and for now I'll put it in my stack here it'll be layer five,

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which is just above enemies, meaning enemies will run in front of the hazards.

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Okay.

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So next, what do we do with these layers now that we've made them?

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Where do we need to go and set them?

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Well over into hazard's tile map.

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I'll change the layer to be hazards and then we'll find our time map renderer and we'll change the sorting

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layer to hazards as well.

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Okay.

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Doing well so far.

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Next up, go and find the spikes that I gave you way back when you got these assets.

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These are some more some pretty bad, Rick.

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Art, if you think you can do better, then by all means create some nicer spikes.

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If you're not sure how, then you can jump into our pixel art course and learn a few things there.

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I'm going to click on the Sprite editor because I need to make sure that the physics shape is suitable.

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So I'll click on the Sprite editor, top left custom physics shape.

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I'm going to drag loosely around my object.

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You might want to drag in the middle.

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I found if you drag off the screen, it doesn't work.

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So drag somewhere in the middle yet four points bottom left.

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Bottom.

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Right, and I'll just put this up at the top here a little bit.

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Now, just right, touching the spikes, I think that's fine.

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Doesn't matter if there's not a gap in the middle.

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We don't need to follow the contour of these.

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Exactly, because the player is going to generally jump on top of these, even though there's two.

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And anything that matters, click on apply that should be good.

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Ex out of that.

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Now what else do we need to do on our hazards tile map to make sure that we can collide with our spikes.

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We need to go to add component and we'll add a tile map collider to DD so then it knows anything we

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put in there should have collision on it, which is great.

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Now you know what I'll do now is I'll just dig out a couple of holes to put our spikes in.

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So for me, I'm going to go to my platform's tile map.

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I'll click on my rule tile, give myself a little extra ledge here to jump up there.

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I'm going to hold down shift to delete some spots.

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So that's how you can delete delete some spots in there that I can put some spikes in maybe a couple

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of spots up here as well.

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You know, we'll make this a big, old, big old pit with spikes down the bottom of it.

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That looks pretty good.

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Next up, we need to be able to paint the spikes on to our hazards tile map.

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So what do we need to do there?

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How do we go about doing that?

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Well, hopefully you're following along.

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You're yelling at the screen or you're actually just doing this.

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I'm going to drag the spikes into my palette and then I'll ask me where we want to save it.

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Assets.

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We will save these in.

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Let's see.

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Tiles I think is good and just called spikes.

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Excellent save.

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You can see we've got spikes down here.

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Now if I change my active tile map, very important to hazards, click on the spikes and I can paint

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those in the spots.

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And the good thing is I can see the green collision around it knowing that I should be able to bump

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into those, collide with them.

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I've got a couple of spikes in there.

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I'm happy with those.

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Now there's one more main step we need to do in here.

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We need to say in our code that the player can collide with this particular layer.

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So how do we go about doing that?

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I'm going to click on hazards, go to my add layer and just double click on hazards and copy that to

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make sure I get the spelling exact.

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Because this is hitting me a couple of times that I've got it not exact and haven't figured out what

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was going on.

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Find my scripts, jump into the player movement script.

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Now if we scroll down to die, we can see that we've got our collider touching layers, we're touching

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enemy.

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We can also comma quotation marks and paste in hazards in there.

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So if we're touching enemies or hazards, we should to all of our dying related things.

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So save back over into unity.

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Let's see if this is working.

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Click on play.

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Run and run and jump.

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And we're not dying now.

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I think I know what's going on here.

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And it's something that I identified a little bit of a bug just a moment ago.

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If you have a look at our player and our spikes, we're not getting to the point where we can actually

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get our capsule collider to touch the spikes because our feet are preventing it.

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That's because our feet is a collider, not a trigger, and the spikes are a collider, not a trigger.

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So we're not falling through these to get to the point because our we want to have our feet on the very,

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very bottom of things.

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So the way to resolve this is we can just make our hazards colliders.

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And so if we click on our hazard tile map and change that to let's see the tunnel map collider change

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it to is trigger.

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Now if we click on play, that means we should fall through it and we can actually touch our collider

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to it.

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Boink and then we go, we die.

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Let's have a look and see what the behavior is with the enemy.

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So I have a suspicion the enemy has its collider or that that is going to prevent us actually getting

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to our collider as well.

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So I think I didn't test this in the last lecture.

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Apologies for that.

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I think if we jump on the top of our enemy, we're not going to die straight away, okay?

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And then we die when it finally touches our capsule.

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Collider So same thing again.

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I'll click on the enemy and I'll change the enemy's capsule.

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Collider To be a trigger so that our feet can fall through it.

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I don't think there's going to be anything else that is going to be affected.

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It's fine if the enemy is a trigger, we're going to do have things trigger.

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So let's see with that, I think I might have a little bit of a bug with it turning.

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Not probably.

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Yeah, I will.

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But let's just see if we can land on it.

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First point, we land on it, we die straight away.

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So that part's fixed.

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Why are we doing the jiggly?

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Jiggly?

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Well, I think I know what's going on here.

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I'm going to show you a little technique.

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If you click on play, get ready on the pause.

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Just before we get to the end.

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I've clicked pause and you can step through, step through, step through.

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You can see that the reverse periscope is going through it.

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It exits the collision.

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We flip.

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But now this that we've made a trigger is touching is inside this collision.

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So I just flipped and that's in there.

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But then once it exits, it flips back again.

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So we just need to deliver of spacing, which should be okay, I'm going to get the reverse periscope

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and click on Let's See the Box Collide.

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I click on edit, just move that out a little bit further.

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So it's going to turn a little bit sooner just to there should be good and we'll move the capsule.

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Collider So it's just a little bit less spacious around the outside.

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It doesn't need to be quite so high either.

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So I'll put the collider in a bunch here and all.

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We could move the periscope out a little bit more and the enemy flips around because the periscope is

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doing what it's supposed to be doing.

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Let's see if we can now jump onto the spikes we can forward.

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It flings us.

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Good, good reaction there.

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We'll see if we can hit the enemy and if it causes our death animation, then we're all good.

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Jump on top of it.

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Great.

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So there we go.

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We've got our hazards and we've got our player.

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Oh, you know, one last thing I'll show you is the fact that anything we put on this hazardous tile

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map becomes a hazard that will harm the player.

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So say all this water up here, instead of the water being on the water tile map, it's going to click

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on the water tile map and I'm going to find my tile palette, click on the water, I'll click on anything,

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hold down, shift and delete.

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That's just an easier way.

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Deleting then getting the eraser.

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Now I'm going to click back on the hazards.

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Tile map has its tile map just here.

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I'm going to click on water.

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I'm going to add the water into the hazards tile map.

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Now, when I jump over and touch the water, that should cause some sort of death reaction as well because

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it's now considered a hazard.

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Okay, that's getting funny as opposed to considered water.

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So it's up to you whether you want the water to be a hazard or whether you want the water to be something

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you can walk through or maybe even swim through if you want to play around with that functionality for

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now, I'm going to leave it as a hazard.

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That means the water tile map doesn't have anything on it for the moment, but that's okay.

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We might do something with that later on.

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I'm going to have it on the hazard.

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So the challenge I've got for you is to play some hazards in your level if you haven't done so already,

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experiment with different objects, place some hazards in your level.

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You can have some water, you can have some spikes, you can create your own things, be a little bit

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creative, and when you've added some hazards, you're ready for the next lecture.

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So I will see you in that next lecture.