Placeholder Image

字幕表 動画を再生する

  • So what we're going to do is setup our player now

  • which is going to get him moving and jazzing and

  • beboping and doing all that stuff.

  • What we're going to do is we're going to go ahead and locate

  • the player model, which is going to be located

  • in Models folder, and we're going to

  • expand that and we're going to look in the Characters folder

  • and we should see a player,

  • there we go, Player, it should be right there.

  • So what we're going to do is we're going to go ahead and

  • drag that either in to the scene or in to

  • the hierarchy view.

  • So we'll just click and drag and drop and there he is.

  • There he is, looking pretty swag.

  • And so obviously if we just click and drag him to the scene he might

  • go where ever, you know, so we need to

  • place him at a specific spot so we're going to be sure that

  • the position is at (0, 0, 0).

  • If it is then you're golden, if it's not then

  • go ahead and set it to (0, 0, 0)

  • by typing (0, 0, 0) or again we

  • have this cog or gear icon

  • and you can just click reset or reset position,

  • which will put it where ever we want it to be on the origin.

  • Now we need specific things to

  • interact with the player in a very special way.

  • And so we want to ensure that we have properly

  • tagged our player so certain things will know

  • when they've come in contact with the player.

  • To do that we have this Tag drop down

  • here in the inspector and it currently says Untagged.

  • And what we're going to do is we're going to click that drop down

  • and we are going to select Player.

  • Thus tagging our player

  • as the player so that the player will

  • behave appropriately when they are playing.

  • Alright, fantastic.

  • Now what we need to do is

  • we're going to go ahead and create

  • an animation controller for our player,

  • which is going to allow us to

  • have all the neat little

  • animation effects of moving and turning and

  • doing all that stuff,

  • and I'm still zoomed in here.

  • So what we want to do is we want to go ahead and

  • locate the Animation folder

  • which we'll just click on right here.

  • Currently it is in fact empty and we are going to make

  • an animator controller.

  • Shall we just talk a little bit about the

  • animations that we've setup first?

  • Great idea!

  • Cool. So the model that we've just dragged in

  • is the player model and what you can do is drag up

  • the preview window in the lower right of the editor.

  • So this model has been animated

  • for you, so when you bring in an FPX

  • in to Unity, or a Maya file

  • or a 3DS Max, whatever package you use,

  • When you bring that in you can

  • store animations within it or if you have

  • a humanoid, a biped-type model

  • you can retarget those animations on to

  • similar type of models.

  • This particular thing is rigged

  • in what we call a generic manner.

  • So if I look at my rig you can see generic up at the top.

  • And what that means is that it's a very specific

  • bone structure because our character is going to move like this.

  • It's going to be kind of hopping around.

  • So he's not got two arms, two legs as a biped would.

  • So the animations that are stored in this

  • particular model that we've given you

  • are a move, an idle and a death.

  • So what we're going to do now is to create

  • a state machine called the Animator Controller

  • to control when these three different

  • animations are going to be played back.

  • If you're looking in the inspector here

  • I highly encourage you not to

  • touch anything.

  • Because these changes change how Unity

  • imports the stuff and if you just start clicking

  • and a little box comes up and says 'would you like to apply?'

  • and you're like 'yeah, apply for what?'

  • and then all of a sudden your stuff is not going to

  • work later, so just look but don't touch.

  • So we're doing this just to

  • show your where the animation's going to be

  • coming from and we're going to go ahead and

  • actually implement it now.

  • We're going to go back to this animation folder

  • and again it's still empty so

  • no magic there yet.

  • And we're going to go ahead and add what's called

  • an animator controller.

  • Animator controllers are part of the mecan animation

  • system, they're basically a finite state machine that just

  • blends animations and does all this neat stuff,

  • it's actually magic, we hired wizards.

  • And what we're going to do is we're going to go ahead and

  • create this asset that's going to allow us to do that.

  • So I'm going to right click here inside

  • this animation folder in the project view here

  • and I am going to select

  • Create and then Animator Controller.

  • Not Animation, not Animator Override Controller

  • but Animator Controller.

  • And I'm going to get this name here and I'm going to name it

  • Player AC for Animator Controller.

  • There we go.

  • And so once we have that what we're

  • going to do is we are going to

  • actually just click and drag that on

  • to the player, which is going to apply this animator

  • controller to the player,

  • I'm not going to put it under the player

  • I'm going to put it on the player and you'll know the difference

  • because Player itself will become highlighted.

  • And I'll let go.

  • I can confirm I did this correctly be clicking on the player

  • and I see here Player AC

  • is now listed in the animator

  • component, Player AC, right there.

  • That's how I know I've done it correctly.

  • Now let's go ahead and look at this animator controller,

  • now that we have it created,

  • and to do that I can go to Window

  • and then select Animator

  • but easier is to

  • see my Player AC and just double click on it,

  • which is automatically going to open up the animator window.

  • If it's not docked here

  • you can just dock it by clicking the

  • tab, dragging it and docking it in to the window.

  • So as we were looking at earlier

  • when Will clicked on the player

  • FPX model and we looked in the inspector and we saw

  • those animations that were baked in to those settings.

  • Those actually create assets that we're able to use.

  • So if I go back to the Model's

  • character's folder right here.

  • and again look at my player.fpx.

  • If I were to expand that I would

  • see the assets that make up

  • this imported model

  • and so I'm going to go ahead and click this model here

  • and what I see is I see these three animations

  • death, idle and move.

  • So not only were the animations imported

  • as part of the model but we actually have them assets

  • that we can utilise.

  • And so what I'm going to do now is I'm actually

  • going to just take each of these in turn

  • and move them in to my

  • animator window, I'm just going to click and drag them,

  • and drop them

  • I'm just going in order here so I'm going to do death,

  • idle and move, the order's not going to matter because

  • we're going to reorder them in just a moment.

  • So when you have this done right

  • you'll see that you have this Any state

  • and a Death state and an Idle state and a Move state.

  • And so we'll notice that the death state is

  • orange, or which ever state you drag in first

  • is orange, right?

  • Orange means that it's the default state.

  • Obviously I do not want death as the default state

  • It's a sad game but it's not that sad.

  • And so what I want to do is

  • I am going to set a different state

  • as our default state, so I am going to right click

  • on Idle and I'm going to click

  • Set As Default.

  • So that will then turn orange.

  • And I can reorder by clicking and dragging and moving

  • things around, if you just happened to be very particular

  • about how things look you can start

  • building yourself some geometric structures if you really

  • feel like it, whatever.

  • Anyway, now we have idle as the

  • default state and so what we need to do

  • is we need to

  • tell the animator

  • when we want to transition from one

  • state to another state.

  • So we've got these three states, idle, move and death.

  • And they're self-contained animations, they can play and all that stuff but

  • the logic of when we go from one

  • to the next isn't currently in here.

  • So what we need to do is we need to create something

  • called a parameter which is basically going to control

  • when something happens,

  • when something changes state.

  • And we access those parameters right here

  • with this little Parameters button

  • it's very cleverly named,

  • and we have this little + icon right there.

  • What we want to do is we want to create a parameter

  • so the first parameter we're going to create,

  • when we click this we're going to see some options

  • we can create a float, as in a floating point number,

  • int is an integer, bool is a boolean

  • or trigger, we want to create a boolean

  • and we're going to call this IsWalking.

  • It's very important that you spell it right

  • like I just did not.

  • There we go, IsWalking,

  • and then enter.

  • It has to be capital I

  • lowercase s, capital W alking.

  • alright, it's important that it's spelt

  • right because we have scripts that you're going to use

  • that reference it by name

  • so if you named it something else, like Skeletor,

  • when the time comes it's not going to work

  • you'll just have to open up your code and change it

  • which you really don't want to do.

  • So we have this IsWalking which is a boolean which

  • means it can be either true or false

  • and that true or false will dictate whether

  • he is walking.

  • I'm going to create another one now so again I'm going to click

  • this little + icon and I'm going to select

  • Trigger, and a trigger is like a boolean.

  • It can have a state True or False

  • but unlike a boolean the moment we set it to true

  • it sets it back to false.

  • Which is useful when I just want to

  • trigger something to happen one time and then it resets itself.

  • So we're going to select a trigger here

  • and this trigger is going to be

  • called Die.

  • We listened to a lot of heavy metal while making this.

  • So die is a trigger that's going to

  • be triggered when the player

  • actually dies.

  • Now what we want to do is

  • we have these parameters which is

  • great but now we need to tell

  • mechanim and the animator specifically how to use

  • those parameters, we need to set up some logic

  • to move us from one to the next.

  • So what we want to do is we want to setup

  • transitions that basically says

  • 'this state is capable of going to that state'

  • and 'this state is capable of going to that state'.

  • We set up these transitions explicitly

  • so that we can't accidentally transition from

  • say Dead to Jump,

  • because that doesn't make a whole lot of sense.

  • So what we want to do is create these

  • transitions which basically are one-way bridges

  • that define logically how

  • we go from one state to another.

  • So what I'm going to do is I'm going to right click on Idle

  • and I'm going to select Make Transition.

  • And when I click Make Transition I get this

  • rodeo lasso thingy

  • which is fun to play with by itself,

  • but we're here for business,

  • so what I'm going to do is once I've confirmed that

  • there's this white line attached to my mouse

  • I'm going to move my mouse over the Move

  • animator state and I'm just going to click

  • and it's going to connect the two.

  • So now what we have is a transition from idle to move.

  • See, there you go in case you didn't believe me.

  • And so this is basically saying that we

  • can go from idle to move.

  • So what I'm going to do now is in order to

  • actually dictate when that happens

  • I have to click on the transition.

  • Too close.

  • There we go.

  • I'm going to click and you'll see it turn blue

  • and so now I have selected

  • the transition between the two.

  • And once I've done that over in the inspector view we get

  • the properties of this transition

  • and what I'm interested in is

  • is down on the bottom we have these conditions.

  • What is the condition of this transition?

  • And so what I'm going to do is

  • click this drop down that says Exit Time

  • and I'm going to select IsWalking

  • and I'm going to leave that as true.

  • So the way you read this is you are transitioning

  • from idle to move when IsWalking

  • equals true.

  • So now what I'm going to do

  • is I'm just going to do the exact opposite,

  • so I'm going to right click on move

  • make transition, get my fun rodeo arrow,

  • now I'm going to click on idle,

  • so this is stating that I am able to move

  • from the move state back to the idle state.

  • and I'm sure that you can all guess what

  • the condition for that is going to be but we'll

  • go through it anyway, I'm going to select Conditions

  • IsWalking equals false.

  • So if the player is walking we play the walking animation.

  • If the player is not walking we don't,

  • we play the idle animation.

  • Finally what I want to do is

  • I am going to create one more transition,

  • this time we want the player to be able to die.

  • So to do that we're not going

  • to transition from idle or move or death

  • because we can theoretically die

  • in any state depending on whichever animation is

  • currently going on.

  • So we are going to use the Any state.

  • And by that I mean the actually green any state,

  • I don't mean you're going to transition from any state you want.

  • So the one that says Any state.

  • So I'm going to right click on that and

  • I only have one option and that's Make Transition

  • and I am going to transition from

  • Any state to Death, so no matter what state

  • you're currently in if you die, you die.

  • I'm going to select that transition,

  • you'll see it turn blue

  • and I'm going to set my condition to be

  • Die.

  • Now since it's a trigger I don't need to

  • specify true, false or a value like that,

  • it's just if Die get's triggered

  • we immediately switch in to the death animation.

  • The next thing we need to do with this player character

  • is to give him a physical presence in the scene.

  • So if you change from your animator window

  • back to the scene view using the tab at the top

  • then you can select the player.

  • We're going to add a rigidbody.

  • A rigidbody component is something that allows

  • the physics engine of Unity to be applied to the object.

  • We are going to click Add Component

  • and choose Physics

  • and Rigidbody.

  • It's important that you don't select Physics 2D

  • Rigidbody 2D, we're doing 3D physics

  • so just physics.

  • So then what we're going to do, because we don't want

  • this to slow down over time

  • we're going to set the drag and angular drag

  • to infinity.

  • So you can do this actually by just typing

  • INF in the drag box and hitting return.

  • If you've done it correctly you'll see a capitalised

  • infinity.

  • We do want to use gravity, we want to keep the player

  • firmly grounded, despite this being a dream sequence.

  • And we do want to use

  • constraints, so basically we're going to use

  • constraints to ensure that the player

  • character doesn't fall forward or fall over any

  • different directions, and we also want

  • to freeze the Y position so he doesn't sink through the floor

  • or jump up or anything like that.

  • In Freeze Position we're going to choose the Y coordinate

  • and Freeze Rotation X and Z or Zee.

  • You'll have to expand constraints if it's not currently expanded.

  • Yep, sorry, you need to expand constraints,

  • if you can't see those properties you should see them

  • at the bottom.

  • Next we need to make sure things can actually

  • bump in to the character because currently

  • he reacts to physics

  • but if he doesn't bump in to anything

  • nothing's going to happen.

  • So if you go to Add Component

  • and then Physics

  • and then there's a capsule collider along with

  • all the other colliders there.

  • We need to give it specific settings

  • so we make sure that the capsule covers the player.

  • So if you change the centre

  • to 0.2 in the X

  • 0.6 in Y and leave the Z as 0

  • or Zee a 0.

  • We also need to change the height

  • to 1.2, so what that's going to mean is that

  • this sort of leaning over character thing here

  • he's got a little bit of an X offset so that the

  • capsules going to cover him nicely.

  • Next we need the player to make

  • a little yelping sound when he gets hurt.

  • So we're going to add an audio source

  • component, so if you go to Add Component

  • Audio, and then find Audio Source

  • and we're going to change

  • the audio clip from None, using the little

  • circle select by it

  • to Player Hurt.

  • When it opens the context sensitive menu

  • you can see Player Hurt there.

  • One thing about the selection window is

  • that you can double click to close

  • it at the same time, if you want to assign something

  • you can open up the circle select, double click

  • will also close the window.

  • Once other thing I'm going to quickly do because we've got these

  • settings done is I'm going to close the rigidbody

  • or collapse it up using the arrow next

  • to it just so that we can see the ones below it.

  • We do not want the player to make a yelp sound

  • on awake, so we're going to uncheck Play On Awake

  • You'll know that if you haven't unchecked that

  • when you start the game it'll go 'oh'.

  • If it does that go back to this

  • and uncheck Play On Awake.

  • So we're going to find the Player Movement script

  • and that's in the Scripts - Player folder.

  • So if you look in the project panel, find Scripts, expand that

  • and then click on Player, you'll see on the right

  • hand side the different player scripts that we've got.

  • We've got an empty class called

  • Player Movement and we're going to go through

  • making that now.

  • You can assign a script a number of different ways.

  • A script is just a component

  • like any other component.

  • But what we're going to do is we're going to drag and drop

  • for this one, so I'm going to grab

  • my Player Movement script, I'm going to drag it

  • up and drop if on to the player game object.

  • When that's done you should see that it appears

  • as a component at the bottom of the list.

  • Be sure to save your scene before we go on to this next part

  • too because we're in the beta software.

  • So first of al double click it for opening and

  • you should get mono develop to come up.

  • There's a number of different ways to open a script.

  • You can either double click the icon

  • in the project panel, you can

  • click open with it selected

  • at the top of the inspector.

  • Or one final way is to, when it's

  • applied as a component

  • you can actually click the cog icon and choose

  • Edit Script.

  • If you give it a moment it's going to open up that

  • script editor for Unity which is

  • Mono Develop.

  • All of this is going to be done within

  • the class, so you notice there's a pair

  • of early braces, or brackets?

  • What we're going to start off by doing is

  • making some variables

  • that we can adjust throughout the course of class.

  • We're always going to start off with our public ones at the top.

  • and then underneath with private ones.

  • So we'll start off with a public float

  • called Speed, which is obviously

  • going to control how fast the player is.

  • I'm going to give it a default value of 6.

  • So the F on the end there is just

  • saying that this is a floating point variable.

  • Now we move on to the private variables.

  • So I could go ahead and type

  • vector3 because vector2 is the first thing it suggests

  • I could accidentally press return and get that

  • but I don't, I want a vector3 type of variable.

  • So these variables we're declaring

  • the type of them first, if you're familiar with Java Script

  • you'll remember that it does it the other way round.

  • So in C# we say the type of variable first

  • and then the name.

  • So this one's going to be called Movement and

  • we're going to use that to store

  • the movement that we want to apply to the player.

  • The next one we're going to have a reference

  • to the animator component

  • and we'll call that Anim.

  • We're also going to have a reference to

  • the rigidbody component

  • and we'll call that Player Rigidbody.

  • So the next one is an integer

  • called Floor Mask, now I'm going to explain this one.

  • If you remember earlier we made that floor

  • quad, that big square that we just left

  • on the floor, that's the thing that we want to raycast

  • in to and the way we tell our raycast

  • that we only want to hit that floor is we use

  • a layermask, which is stored as an integer.

  • If I hit save right now, basically we designed

  • this project on a PC,

  • we've opened it on a Mac,

  • files have different line endings, it doesn't matter

  • at all, just hit Convert, everything will be fine.

  • So the last private variable that we're going to make

  • is a float

  • called camRayLength.

  • That's going to be the length of the ray

  • that we cast from the camera,

  • and we're going to give that a value of 100.

  • The next thing that we're going to do is setup

  • those references.

  • We're going to setup the references

  • in the awake function

  • Some of you will be familiar with

  • the start function, awake is very similar

  • but it gets called regardless of whether

  • the script is enabled or not.

  • So it's good for setting up references and things like that.

  • We're going to start off by setting

  • up our floor mask

  • and we're going to use LayerMask.GetMask

  • so then we can parse in a string

  • which is just a word or a sentence

  • of the layer that we're going to get.

  • So we put the floor quad

  • on the floor layer so we're going to get mask from floor.

  • Then we're going to use GetComponent to

  • get the references to the animator, like that.

  • You'll notice a little angled brackets there,

  • that's just denoting the type of what we're looking for.

  • In this case we're looking for an animator so we write .

  • If we were looking for a rigidbody we'd write and so on.

  • So we write here.

  • And that's all we need to do to setup the references.

  • Next what we're going to do is

  • put a call to fixed update.

  • Fixed update is a function

  • that Unity will automatically call on it's scripts

  • that fires every physics update.

  • Unity runs on a number of updates.

  • The normal update system that you're familiar with

  • runs along with rendering.

  • The fixed update runs with physics.

  • So since we're moving a physics character

  • he's got a rigidbody attached we're going to

  • use fixed update to move him.

  • So what we're going to do is get the input

  • from the horizontal and vertical axis,

  • but we're not going to get the standard input,

  • we're going to get the raw input.

  • So whereas a normal axis would have values

  • varying between -1 and 1

  • the raw axis will only have

  • a value of -1, 0 or 1.

  • It won't have any variation in between those.

  • So what that means is that

  • when we're controlling the character, rather than him

  • slowly accelerating towards it's full speed

  • he's going to immediately

  • snap to full speed, which will give us a much

  • more responsive feel.

  • Just so you know, an axis is actually input.

  • So these axis, horizontal

  • vertical, jump, fire1, fire2,

  • those are defaults within Unity,

  • so if you're wondering what horizontal is it's

  • already in there.

  • So the horizontal axis basically maps

  • to the A and D keys

  • as well as the left and right arrow keys.

  • Either of those manipulate the horizontal axis.

  • Pressing the A key gives me a value of -1

  • in the horizontal axis, pressing the D key

  • gives me a value of 1 in the horizontal axis.

  • Vertical is another axis, it's the W and S keys

  • as well as the up and down arrows.

  • Fire1 is your left mouse button

  • or right control, so on and so forth.

  • If you're curious you can go in the input manager,

  • I think Will had that up there a second ago

  • and that's where these axis exist and how we set them up.

  • But the ones we're all using here are defaults

  • so there's nothing special that you need

  • to do to get those.

  • Go ahead and put in the vertical axis as well,

  • we're storing that as a float called V,

  • so these are private variables within

  • fixed update so we can use

  • them within specifically fixed update.

  • So remember that the variables that we created earlier

  • are outside of these functions so we can use

  • them within any of the functions in this script.

  • Fixed update and awake are automatically

  • called by Unity, they're mono-behaviour functions.

  • But we can also make our own functions

  • that we can call within those fixed update and awake.

  • What we're going to do now is create a

  • move function that we can call in fixed update later

  • to move our character.

  • We're basically going to split up the actual

  • operations of those player movement script

  • in to movement, turning and animation.

  • We're going to put them in to separate functions

  • to keep them all modular.

  • If you make a Move function

  • that's going to have 2 parameters,

  • a float called H

  • and a float called V

  • and unsurprisingly those are going to be the input

  • that we'll parse in to this function when we call it.

  • We have this movement vector that we stored

  • earlier and we want to set the value

  • of that, so if you type movement.set

  • then you get the chance to put each of the

  • X, Y and Z components of those

  • so we're going to use H for it's X component.

  • We don't want any vertical components so we're

  • going to put that as 0.

  • We're going to use an F because it's a floating point.

  • And then V for the Z component, so what that means is

  • X and Z are flat along the ground.

  • The horizontal and vertical movement that we give it

  • will translate to lateral movement in the game.

  • Now we've set that we have a bit of a

  • problem because if you move

  • just in the Z axis or just in the X axis

  • then you've got a value of 1,

  • like a size of 1 for that vector.

  • However, if you use both then

  • the length of the vector is different,

  • it's 1.4,

  • so we need to change that so that you don't

  • get an advantage by moving diagonally.

  • What we want to do is normalise that.

  • So what that means is it's going to take

  • a direction that we have

  • but it's going to make sure that the size is always 1.

  • Effectively make sure that the player moves at the same speed

  • regardless of which key combination you use.

  • We don't want it to move at a speed of 1, we want it to

  • move at our speed, so we're going to times

  • that by our speed variable that we stored.

  • Also, this is called fixed update.

  • So we don't want it to move at

  • 6 units per fixed update,

  • it would move 6 units every 50th of a second

  • and we wouldn't see our player ever again,

  • so instead we're going to change it so that it's

  • per seconds and the way we do that is by

  • multiplying by Time.DeltaTime.

  • DeltaTime is the time between each update call.

  • So if you're moving it by that much

  • per 50th of a second

  • over the course of 50 50ths of a second

  • it is going to move 6 units.

  • So finally in this function the last thing we need to do is

  • apply that movement to the player.

  • So we're going to do that using a rigidbody function

  • called MovePosition.

  • So MovePosition moves a rigidbody

  • to a position in world space.

  • So we need to move it relative

  • to the position that the character currently is.

  • We need to add our movement

  • to the player's position, the transform.position + movement.

  • So it's going to be it's current positions plus

  • this input that we've given him to move him

  • slightly further along.

  • The next thing that we're going to do is look at the

  • turning of the character.

  • Again we're going to make a new function.

  • This time we're going to call it Turning.

  • We don't require any parameters for this.

  • Because the direction the character

  • is facing is based on the mouse input

  • rather than the input that we've already stored.

  • The first thing that we're going to do is create

  • a ray that we cast

  • from the camera in to the scene.

  • Let's have a little look at how that actually works first.

  • If you have a look at this diagram we have

  • a representation of the camera,

  • the screen and the level plus the floor quad around the level.

  • So that box that you're looking at there

  • is effectively your level,

  • the floor quad is around that

  • and the camera, if you think of the camera as

  • something that's looking from where you're

  • looking at the game on the screen

  • forward on to the game level

  • you cast a ray, a single invisible line from that point

  • to the floor quad to get a particular position back.

  • And we want to use that because we want the

  • character to turn and face the

  • point of wherever the camera's looking.

  • So when you move the mouse around in the game

  • he's going to turn around and face that position

  • so that you can turn around and also shoot

  • in a particular direction.

  • So we see this end bracket on line 40,

  • make sure that's there.

  • It's a real quick gotcha that everyone always does is they

  • move their functions down outside of the class

  • by accident, so if you have

  • avoid Turning with your open and closed brackets

  • and you don't have another bracket immediately after that

  • you've missed one.

  • And don't just add another one

  • because then you're going to have one in the wrong spot

  • and another one in the wrong spot.

  • Instead just move that function back

  • up so that it is inside the class.

  • The first thing we're going to do in this function is

  • we're going to create a ray.

  • So we'll call that camRay,

  • a ray coming from the camera.

  • And we're going to use a function of

  • the camera, the main camera called

  • ScrenPointToRay.

  • So what that's going to do is take a point on

  • the screen and cast a ray

  • from that point forwards in to the scene.

  • So the point that we're going to give it

  • is the mouse position.

  • So it's always going to find the point

  • underneath the mouse if you imagine.

  • So if you're looking at the game,

  • there's a mouse on your screen, the point underneath that

  • mouse is the point it's going to find

  • if that hits the floor quad.

  • We need to get information back when we

  • do this raycast and in order to get

  • information back from this raycast

  • we need a RaycastHit variable,

  • so that's what we're creating here.

  • The next stage is to actually

  • cast the ray that we've created.

  • So we created this imaginary invisible line

  • and now we need to actually perform the action

  • of casting the ray

  • so that it can hit something.

  • A raycast function will return

  • true if it has hit something

  • and it will return false if it hasn't

  • So we're going to put that inside and If statement.

  • And if it has hit something

  • then the code within the If statement

  • will be carried out.

  • If it hasn't hit anything then the code within

  • the If statement won't be carried out

  • so we'll just skip out of this function.

  • That's what that little If at the start there is for.

  • So we need to give this a number of parameters.

  • Let's start off with the ray itself, that's the

  • positions and directions of the cast that we're going to have.

  • We need to use an Out variable

  • for the floor hit, so Out means

  • that we're going to get information out of

  • this function and we're going to store it

  • in that floorHit variable.

  • Next we need to give it a length,

  • so how far are we going to do this raycast for?.

  • And that's the variable camRayLength that we store earlier.

  • And finally we want to make sure that this raycast is

  • only trying to hit things on the floor layer.

  • That's that floor mask that we created earlier.

  • Remember that since this is an If statement

  • and a function there should be

  • two closed braces at the end there.

  • So if you see you've got if (Physics.Raycast (

  • and then at the end we need to close both of those brackets again.

  • Okay so we've got the open curly braces afterwards

  • and this will be the code that's carried out

  • if we've hit something, so we need to

  • create a vector3 from the

  • player to where the mouse has hit.

  • And that's the floorHit.Point,

  • so that's the point that it's hit the floor

  • minus transform.position, that's the position of the player.

  • We're going to apply this

  • to the character to make him turn

  • but we don't want him to sort of start leaning back

  • so we need to make sure that the Y component

  • of this vector is definitely 0.

  • Now we can't set a player's rotation based on

  • a vector so we need to change that

  • from a vector in to the

  • horrible word, quaternion.

  • So quaternion basically speaking is

  • a way of storing a rotation.

  • We have a vector3 but we can't

  • use that to store a rotation so we use a

  • quaternion and we're going to create one called newRotation

  • and quaternions are also a class

  • that has a number of functions of

  • which we're going to use one called LookRotation

  • So what lookRotation does, the default for

  • characters and cameras and things like that

  • in Unity and in most 3D modelling

  • is that the Z axis is their forward axis.

  • So we want to made the playerToMouse vector

  • the forward vector of the player.

  • So that's all that this function is doing

  • when we give it the playerToMouse.

  • When we actually have to apply it so we're going to

  • address the player rigidbody.

  • I'm going to use the moveRotation function

  • and since we don't want to give it an offset

  • we're trying to give it a completely new rotation.

  • We're just going to assign it like that, we don't need to do

  • transform.rotation + newRotation,

  • it's just this rotation.

  • So that's our turning, the next and final function of this,

  • we're going to look at the animation.

  • After the turning we're going to make another function

  • called Animating.

  • Now we do need to give this the

  • H and V parameters because

  • whether or not the player is walking

  • or idle is dependent on the input.

  • So what we're going to do is we're going to create

  • a boolean variable called Walking.

  • And we need this to be true

  • if either the H variable

  • or the V variable has some value.

  • If it's 0 then

  • there's no input on that axis

  • and we don't need to worry about it.

  • But if either H or V has

  • a value that's non-0 then

  • it's true and the player is walking.

  • So what that complicated bit of code there is doing

  • is saying that first of all H

  • is that not equal to 0?

  • That will return either true of false

  • depending on whether it's 0 or not 0.

  • Or

  • is V not equal to 0?

  • What this is basically saying is 'hey, did we

  • press the horizontal axis or did we

  • press the vertical axis'?

  • If we pressed either of those we're walking.

  • If we didn't we're not.

  • So the reason we're doing that is we want to

  • parse this to our animator component

  • so you'll remember we made a parameter called IsWalking.

  • And the way that we set that is we say

  • anim, so our reference to the animator component,

  • Set.Bool, so we made a parameter which

  • was a type bool, a boolean, true or false.

  • And it was called IsWalking.

  • So first to actually set this

  • we tell it which one so the IsWalking parameter

  • and then we give it a value, so we could here write true or false

  • but we want to use Walking, the variable

  • that we just made.

  • So the very last thing that we need to do in this class

  • is we need to put, so we need to put

  • calls to those functions that we've made.

  • Currently they're just functions sitting there by themselves.

  • We need to make sure that those functions are

  • actually being called an actually being used.

  • These three functions aren't happening

  • until we tell them to, we haven't actually

  • called them anywhere in the script, they just

  • exist and are waiting to happen.

  • In fixed update that we created earlier

  • we already got the input, we stored that.

  • Now after we've got the input entirety

  • we now need to call these functions that we've created.

  • So we call them just by using their name.

  • And then parsing in the values if they're required.

  • So Move requires 2 floats,

  • we've got our floats for input there

  • and that's all that we need to do.

  • So we need to say H and V

  • semi-colon.

  • Then we'll call Turning which doesn't take any parameters

  • And finally we'll call

  • Animati, which does.

  • Like that.

  • These are in fixed update, so they're being called

  • every physics step.

  • That is the end of that script so what I want you to do

  • now is to go to File - Save

  • and switch back to Unity.

  • If anything is wrong you will see an error

  • at the bottom of the screen in red.

  • When you have no errors in your script,

  • when you press play at the top of the editor

  • you can move your character around with the arrow keys

  • or W, A, S and D.

  • The animation should function

  • but the actual movement of the mouse should be a little bit

  • tricky right now because we haven't moved the

  • camera to the right point, so the camera isn't

  • seeing the entirety of the floor quad yet

  • and that can be a problem, but we're going to solve

  • that in the next phase.

  • So you should be able to move around.

  • You'll note if I move the mouse up away from the floor quad

  • that it doesn't rotate.

  • As soon as I move it back over there the rayCast

  • kicks back in and I can turn around

  • and run around this this.

  • Okay so we're at the end of phase 2.

  • Phase 3 will be setting up the camera

  • and we're going to have a quick look at the script that

  • will make that camera work.

So what we're going to do is setup our player now

字幕と単語

ワンタップで英和辞典検索 単語をクリックすると、意味が表示されます

B1 中級

サバイバルシューターチュートリアル - 2/10 : プレイヤーキャラクター - Unity Official Tutorials (new) (Survival Shooter Tutorial - 2 of 10 : Player Character - Unity Official Tutorials (new))

  • 51 3
    辛建甫 に公開 2021 年 01 月 14 日
動画の中の単語