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In this lecture, we need our character to jump.

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So we're going to implement the code for jumping and do a bit of tuning.

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Now we could add a jumping animation, but I'm okay just using the running and idling depending upon

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what the player is doing.

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I think that'll look fine if you if you jump in it still using the running animation that is.

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Okay, let's have a little bit of a reminder in our input actions information.

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We created a jump method or a jump action.

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Sorry.

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And this jump action automatically creates the on jump message.

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The on jump message.

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What's inside that?

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Well, nothing yet because we haven't created it.

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But we will create things that the game will do when on jump is called.

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And when is it called?

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Well, it's called when either of these two bindings is enacted.

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So when space is clicked or when a button south is clicked enacted.

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That's not a word I use every day.

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Anyway, we've learnt something and so here is jump.

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And as I showed you before, if you click on player and look for the player input, you can see that

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one of the messages down in here is going to be on jump just there.

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So over into our script, our player movement script, let's see underneath on move I will create void

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on jump and once again we need a particular value to be passed into us.

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We need to know whether the button's pushed or not.

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So we will create input value.

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Once again, we'll just call this value and then in our curly braces and on jump is a little bit different

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to our on move and our run.

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So on move.

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We wanted to know what's the vector two and because it doesn't change every frame it might stay on,

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say, plus one while the player is holding down a key.

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We needed a way of storing the plus one up here in our move input and then in update saying hey, continue

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to run if the circumstances are appropriate.

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In other words, it's greater or less than zero, but with jump it's a button, so we don't need to

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be putting this into update.

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It literally is when the button is pressed, do a thing.

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So we're going to create a bit of an if statement, if the value dot is pressed.

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That's our way of doing it up here.

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It was valued at get vector too, but this is valued is pressed.

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If it's pressed, then do some stuff.

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Do stuff.

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I'm giggling because I was about to write do stuff which is incredibly sophisticated programming.

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Starting Point.

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We know we're working with the rigid body and also with velocity, and this is why we want to add a

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force to it.

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We want to throw some velocity onto this.

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So I'm going to plus equals.

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So take whatever your velocity is right now for up and down and then add something to it.

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And what will we add to it?

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Well, we'll create a new vector to once again, we need an X and a Y on the X.

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We don't want to be adding anything.

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So I think we can just say zero on there.

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Don't add a new thing with run we were assigning.

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So the velocity is now this particular velocity, but within the jump we're adding.

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So we're saying take what you've got and add some more to it.

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We don't want to add any more to the X, so we'll leave that at zero and then to the Y we want to add

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a certain amount.

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So I don't know what that certain amount is yet.

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So we'll call it jump speed as a new variable semicolon and we'll jump up to pardon the pun, jump up

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to the top serialised field and we'll make this a float and jump speed.

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Initialize this at five, maybe five f semicolon back down here.

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So jump speed should be cool.

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Now let's save that and see if it actually works.

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Click on play jump is assigned to spacebar.

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Bu there we go.

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We are jumping.

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Whoa.

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And that is some serious distance we get with our jump just there because we're floating in the air

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for quite some time.

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So that's a win.

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Let's have a look at some of the issues in here.

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If I was to push the spacebar twice, once, twice, three, four, five.

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Okay, so that's an issue we'll need to address in upcoming lectures.

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What else can we do?

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Well, we're all right.

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We're going a really long way.

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That might be what you want, but it's not really what I want.

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And if we fall down here, could we actually get out of there?

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No, we couldn't.

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So there's some things we need to tune for our character.

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Let me show you show you a couple of things, and then you can go ahead and tune this yourself.

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The first thing, if we go up to edit project settings and look for physics, 2D within here we've got

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a gravity setting so we can make the gravity heavier for the player.

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We can make it lighter.

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That's one place we could change it.

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And this will change everything in our game world.

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It'll change things.

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We shoot, it'll change enemies.

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If we change our gravity here, that's a holistic gravity.

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Or we could click on our player and then find within our rigid body.

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You can see the gravity scale for the player just here.

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And if we wanted to make the world heavier or lighter, we could change it in here.

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And so if you were changing the gravity for everything in your world, then you'd certainly want to

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go into the project settings and the physics 2D in there.

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So it changes for everything.

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But I'm pretty much only going to care about gravity for my player, so I'm just going to do it directly

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in here, make the gravity twice as strong, and then see how that goes.

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So gravity scale of two, okay, that's pretty good.

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But now he's not jumping anywhere near high enough and that's going to be changed within the player

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movement script.

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And you can see our jump speed is five in here.

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So it's time for a challenge I think.

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Tune your jump using the gravity and jump speed tune your jump so it feels good.

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Decide how many tiles you want your player to be able to jump up.

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So if I run my player at the moment down to this little bit where I've got the jump, ignore the water

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for now, it'll do some watery stuff later on.

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But down here I can only jump maybe one tile.

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I can't even get out of this.

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This is two tiles in here.

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One, two.

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I think I want my character to be able to jump a little bit over three tiles.

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So that's the tuning I'm going to be aiming for and then decide how far you're okay with your player

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floating horizontally when jumping.

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So all these things are combined to say, Well, what should I tune it?

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To tune it based upon the performance you want your player to have.

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So there's a challenge to take that on.

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C back here when you're done.

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Okay.

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First thing, I need my character to jump higher.

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So Jump Speed will put this to 15.

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Click on play, see what happens, but jump down here.

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But that's now far too fast.

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So they make the gravity heavier or the jump speed less.

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I think I'm going to try the gravity heavier while I'm still in plane mode.

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I'll do this so I can change these things on the fly.

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That's pretty good.

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It's floaty.

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It gets quite a long distance, though, doesn't he?

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So jump speed will put to 20.

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Gravity will plop up to four.

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See how that impacts blow?

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He's flying way too far.

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Gravity will put to ten just to be crazy.

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Okay.

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And there's a good issue that we've spotted just there that he fell right through the world.

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So I'll get back to that in a moment.

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Just mental note, I think maybe eight.

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So eight on the gravity scale and I click out of play mode.

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It's going to go back to what it was eight and 20, I think I had here jump speed.

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We'll see how that goes and I'll play around with that a little bit more.

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But we just want near enough is good enough for the moment.

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The other thing was with the player missing the collision, that's because we currently have our collision

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detection on discrete.

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We want to change that to continuous.

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Continuous is better for things that are moving a lot and moving quickly.

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It's a little bit more expensive computationally.

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So we only want to do that really for the player character and anything really important.

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Pop that on to continuous.

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We'll see if we still have that problem.

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All right.

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This was the spot.

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Looks pretty good.

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I like the speed.

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Now the player can get a reasonable distance.

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It feels pretty good, actually.

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The only test I've got now is can he reach the third level?

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So I just need to make the jump speed a little bit more than I think I'm done.

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So 25 but I'm going to put it somewhere around 25.

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My gravity I think was somewhere around four, wasn't it?

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So there we go.

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That's feeling pretty good.

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Like Bing's like a little jumping.

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Jack I kind of like the feeling, but you can have yours tuned however you like that works for you.

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Mine's at Gravity Scale eight and Jump Speed 25.

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So there we go.

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We've implemented basic jumping into our game.

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There's a few more things that we need to resolve with jumping, couple of bugs, but we've got the

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basics for it.

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Okay, so in the next lecture.