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In this lecture, we're going to play around a little bit with our Sprite shape.

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We're going to make our snow look a little bit better and we're going to add an edge collider so that

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we can start to use Unity's physics system to make things roll down hills.

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Okay, let's get started.

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First thing I'll do here is to move my sprite shape.

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So I'm going to click on my Sprite shape at this level, hit W on the keyboard and just move it to the

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start of the level.

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So you can see here where the camera is, the camera is at the origin 000.

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So it makes sense to have my level start at zero zero and I'll just position my world so that it fits

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roughly where I want it to be with the camera.

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Okay, round about there.

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It's good.

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Okay, so what we're going to do here is add an edge collider.

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So click on your level, sprite shape and scroll on down, find add component and we're going to search

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for Edge Collider two DX Click and then bump straight away.

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You'll see that has added a collider all the way along our sprite sheet, which for me is Magic Collision

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has already been added.

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So you can go and modify this, click on the sprite shape, click on edit spline.

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I could go and move any of these nodes and the collision flows along as well.

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That's such a powerful thing to know when it comes to making platformers or making shapes or making

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any sort of product as well.

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This is this is huge.

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I love it.

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Now, what I want to do next is add a ball at a circle that can roll down this particular hill so I

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can roll along in our level.

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I'm going to give that to you as a quick challenge is to make a ball roll down the hill.

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I'm not going to give you any more information, see if you can figure it out from there.

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So that is a challenge.

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Pause video.

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Take that on.

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See you back here when you're done.

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Okay.

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Now, if you jumped over into your hierarchy and right click and created a 2D object, then you're in

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the right ballpark for sure.

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If you clicked on sprites, excellent.

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Now if you went and said sprite circle and then add a rigid body to that, add a collider to that,

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that's perfect.

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That's a great way of going about doing it.

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I'm going to show you something slightly different.

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If you look at physics, you'll see that we have what is called a dynamic sprite.

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If I create a dynamic sprite, just going to rename it from dynamic sprite to B say ball.

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It comes already attached with some cool things.

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It already has a circle collider and already has a rigid body 2D.

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So we don't need to go and add those things.

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It's ready to be a physics thing.

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I'm just going to line it up in my scene view so that it matches what I can see in my camera view.

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I could move my camera to that spot.

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I'm just going to move the ball to the start just here.

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Okay.

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Now, it's important to make sure that it's dynamic.

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Yes.

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On the rigid body type.

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That's important.

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It's also important to make sure that we've got some gravity on.

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Yep, that's cool.

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So when I click on play, everything else should take care of itself.

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The ball just drops to the ground bonk and then roll, roll, roll.

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You see, my screen went big just now because I've still got maximize on play clicked on for some reason.

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So in my game window I might need to scroll over here, find maximize on play.

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I'm going to turn that off.

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But obviously if you wanted to have your game take up the full screen, you're going to have a maximize

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on play turned on.

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I can turn it off for now and then just do that one more time.

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Click on play and my ball is going to roll using gravity and using its physics system.

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Excellent roll or roll, but you can see there's a problem.

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We've got a little bit of a gap between where the ball is and where our world is because our edge collider

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is above where our snow wants to be.

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How do we address that?

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Well, to be honest, it took me ages and ages and ages to track this down when I was wrestling with

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why this is the case.

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But the fix is incredibly simple.

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Click on your level, sprite shape and then under Collider you can see an offset.

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We want to change that offset.

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I'm going to drag it down.

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You can do it wherever you want.

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I'm going to drag it down to be just a little bit within the snow roundabout.

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For me, it's a 0.31 when I click on play.

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Now, the ball should look like it's in the snow, touching it properly, yet rolling along the snow.

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That's what we want.

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Now, another thing we'll do while we're here is just have a look at the scaling of this amount of snow

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versus all of the blue.

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I think I want some more snow.

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So what I'm saying is I want my tile to be larger.

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And the way that we do this is a little bit trickier.

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But I'm going to scroll out, scroll out so that I can see all of my level, click on my level, sprite

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shape, click on edit spline drag to select all of the dots, all of the points.

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And now in here you can see we've got something called height.

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And if I increase the height, it will make all of my snow look bigger and or I can drag it the other

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way and make it smaller.

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So drag it to the point where I think it looks pretty good around about there.

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I think, yeah, that's not too bad in relation to ball and snow and blue and all that kind of jazz.

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Now when I scroll back in, let's see if it has retained on a double click on my ball to zoom right

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into the ball, then I'll click back on my sprite shape again.

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Yeah, it's retained the placement for where our collision is relative to the outside of the sprite

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shape.

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I can move my ball just a little bit above to make sure it's not touching the thing.

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Cool.

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So there we go.

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So I've just made it look a little bit nicer now.

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One thing I skipped over quickly because I gave you assets already that were already cut up nicely.

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But if you look at this snow tile, you can see in our little preview here, it's got a curve on the

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end of it to say, well, we could have this as an end point, but in our world we don't see that curve.

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That's because I've already edited it in the Sprite editor, so I want to show you that process.

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In case you're using any other particular shape, you click on Sprite editor and you can see in here

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we've got these green lines.

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So I've already said for this one graphic I'm using, I want the shape that we're using for our particular

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Sprite shape is to go from here down to here.

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Hopefully you can see those green lines in there.

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If I was to move that, I could say, well, maybe I want it to go from there all the way to there and

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then click on Apply.

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And now when we go back into our into our scene, you can see that the curves have been captured and

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it doesn't tile in a very nice way at all, does it?

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So that's an important thing for us to note.

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I'm going to go back into my Sprite editor's click on my Snow Tile Sprite editor and then I'm just going

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to put this just a little bit past where the curve is, just there a little bit past where the curve

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is just here.

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So we could have done this when we're placing it down.

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But I just wanted to point that out.

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Now that we need to do that, if you've got anything else you're bringing in, the other thing you might

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be wrestling with is if your fill isn't texturing properly, particularly if you've brought in your

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own asset for this as well.

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And I totally encourage you to use different assets to what I'm using.

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So if you click on the Blue Fill need to make sure that where it says the wrap mode we have wrap mode

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is repeat.

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If you have wrap motors clamp, it might give you some weird looking artifacts, particularly if your

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fill isn't just one color minus just one color.

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So it can't really go wrong no matter how.

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Raps or how it repeats.

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But here in rap mode, I've got repeat and it's the same if I click on my sprite tile for the snow in

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here we have repeat as well.

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So just want to point those things out.

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I really encourage you to go add your own assets to this so it looks different.

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And in this lecture we've gone and added an edge collider so that we can get that whole physics dynamic

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and use our sprite shape as our world that our snowboarder is going to be cruising around on.

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So good stuff.

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I'll see you in the next lecture.