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Intro

2:20

Installation

3:45

Setup

7:20

Testing

12:20

Arm Mover

13:40

Constraints

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how

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environment

00:00:01

characters to interact with things

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around them sometimes they need to pick

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up objects sometimes they need to aim in

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the right direction and sometimes they

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just need to place their hands and feet

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correctly on the environment this used

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to be a pretty complicated task but

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luckily unity has added a feature called

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animation rigging that makes it so much

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easier it's currently in preview but

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most of the big features have already

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been implemented but Before we jump into

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unity and start using it let's have a

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look at how animation rigging works also

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this video is sponsored by unity so

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normally when we have an animated

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character in unity it consists of a few

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things a base object with an animated

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component this controls what animations

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to play as a child of this object is the

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mesh itself this normally has a skinned

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mesh renderer component and is

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responsible for rendering the character

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itself and finally we have the character

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skeleton often called the rig this is a

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hierarchy of game objects that make up

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the individual bones of our character

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for example this character has a pelvis

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bone that leads to the spine that leads

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to the thighs that leads to the calf and

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then the foot so character animation

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basically works in three steps the

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character plays on animation determined

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by the animator the bones are then moved

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around by that animation and the mesh of

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the character then shapes itself to

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follow the bones using the skin mesh

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renderer but what if we don't know

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beforehand exactly where we want

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opponents to go animations are fixed so

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they don't always fit perfectly with the

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interactive parts of our game say for

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example we want a character to look

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towards the player well in this case we

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need to change the rotation of the head

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while the game is running depending on

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the position of the player but we can't

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do that if an animation is already

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controlling our head bone this is where

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animation rigging comes in with

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animation rigging we basically create an

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extra rig on top of the original one

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that then overrides part of that

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animation think of this like a much

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simpler rig which only has two controls

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that we need in this case we would

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create a rig with the multi aim

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constraint this component would

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reference the bone that we want to

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control in this case the head bone as

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well as a new object that we create to

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act as the target when we then play we

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can see that our original animation

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plays just fine but our head rotation is

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being controlled by the new rig this

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allows us to do many things just using

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different kinds of constraints it

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when it comes to the character

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interacting with objects so with that

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explanation let's jump into unity and

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try it out some community and as you can

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see I'm using version 20 28.1 animation

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rigging will also work with 20193 but

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unity have added some nice convenience

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features to make setup easier in the new

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version and the first thing that we

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wanted to do is go ahead and install the

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animation rigging package but it's

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currently in preview so first we have to

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make sure to enable preview packages to

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do this we go under edit go to the

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project settings go under package

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manager and make sure to check enable

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preview packages with that we can simply

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open up the package manager window so I

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go window package manager here at the

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top we'll make sure to show all packages

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and now we can just search for animation

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and here is the animation rigging

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package let's simply select that and

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install it and that's it the package is

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now ready to be used now as you can see

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I've gone ahead and set up this very

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simple example scene with just a camera

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ground and a character and with all the

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talk of bones I thought that nothing

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would be more appropriate than an actual

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skeleton the skeleton character here is

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freely available on the asset store will

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of course have a link for that in the

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description now this character has an

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animator here that if we hit play

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just place the idle animation over and

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over we can see that inside of the

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animator window but remember we could be

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playing any kind of animation and we can

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easily switch between them while

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overriding some of this movement but

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we'll see that later now the first thing

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that I recommend you do is setup

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animation rigging to show some of the

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bones that are making up our character

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and we can actually do this really

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easily by simply selecting our character

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going animation rigging and selecting

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bone renderer setup as you can see this

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adds a component that references all of

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the transforms that make up our rig this

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is a rig here and these are all the

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different bones inside of that rig and

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as you can see they're all reference

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here and it simply displays them inside

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of the scene view we can go ahead and

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change the size of the bones the color

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and the shape but for now the default

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settings are going to do just fine and

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this is not only going to show the bones

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it's also going to allow us to select

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them using our mouse which is just

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really handy

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now the second thing that we're gonna do

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is create a rig remember animation

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rigging works by creating an extra rig

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on top of our original one that is going

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to modify our movement to do that again

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we just select our character we go

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animation rigging and hit rig setup and

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as you can see that creates another

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component this is the rig builder which

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now has a rig layer called rig one and

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if we click that we can see that this is

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an object that is now under our

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character called rig one with a simple

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rig component so this is where we're

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going to be building our rig in other

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words we are going to be adding

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constraints under this object if example

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we wanted the head of our character to

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be constantly looking at a target we

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could go ahead and add a multi aim

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constraint so I'm gonna right click on

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this object here and create a new empty

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object under it I'm gonna rename this

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object to head aim and I'm gonna go

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ahead and add a component here go into

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animation rigging and here we can see

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all the different constraints I'm gonna

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select multi aim constraint now here we

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need to fill out a few things the first

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one is the constraint object this is

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what we want our constrain to apply to

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in our case that's the head since we

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want to be controlling the head with

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this component so I'm gonna go under our

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skeleton here and I'm gonna go ahead and

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find the head and drag that in then we

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have the aim axis in our case that is

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going to be the y-axis and finally we

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have the source objects in other words

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the target that we're going to be aiming

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towards you can create multiple targets

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here and blend between them for now I'm

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just gonna go ahead and create one

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target so let's go under our hit aim

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here

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that's right click and create a new

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object let's again rename this object

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I'm gonna call it target and instead of

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having this just be invisible inside of

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the editor let's go ahead and add a

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gizmo so we can do that down here in the

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right hand corner we can hit the plus

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sign and this allows us to choose an

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effector gizmo so first under the shape

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here we can search for effector and as

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you can see there are some different

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ones there's a ball a cube a circle a

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locator and a square I'm gonna choose

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the ball effector for this one I'm also

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going to set the size to something like

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point two and now we can clearly see the

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target then we can go back to our head

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aim and simply assign this target as a

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source object and it should actually

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work now but under these settings we

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have the possibility to limit how much

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our head can rotate which is probably

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something we want to do because there is

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after all a limit to how far we can

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stretch our neck it might not apply to

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this skirt and guy right here but it's

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probably still going to look better if

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we added so under the minimum limit here

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I'm gonna put in minus 100 and as the

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maximum limit I'm gonna put in 100 so

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now we can only rotate 100 degrees in

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either direction and that's it if we now

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go ahead and play we can see that our

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head immediately snaps to look at the

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target and if I now change this target

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around as you can see our head just

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follows awesome and we could of course

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put this target anywhere we'd like we

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can have it follow around a player

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character we could place it if something

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important is happening say an explosion

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happens over here we probably want the

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characters to notice we can do so much

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with this stuff and as you can see it

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works perfectly as long as we don't get

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too far behind the character next really

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aren't made to stretch this far and it

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does lead to some weird behavior so for

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this I would recommend adding some kind

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of script that reduces this effect if

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the target gets behind the character

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look at the under the rig here there is

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a weight this allows us to control how

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much this constraint should influence

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our character so if I go ahead and dial

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that down we can see that our head is no

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longer being influenced by the weight so

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what you could do is simply reduce this

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using a bit of code if the target gets

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too far behind the character so weights

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make it really easy to control when to

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apply constraints and we can actually

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control the weight of individual source

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objects as well if we select the head

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aim there is a weight slider here under

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the source objects also right now for

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example it looks a bit weird because

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only the head of our character is

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rotating normally humanoid characters

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will rotate a bit of their chest and

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arms as well so let's quickly add that

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using the weight slider to do this we

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can simply select our head aim and

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duplicate it so I'm gonna press control

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D

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we can then rename this to chest aim and

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instead of having a separate target for

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this that's delete that let's take our

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target here and move it outside of these

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two so it's a separate object and let's

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also assign that to our chest so now

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both are heading and chest aim are using

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the same target and what we can simply

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do is go into our chest aim and reduce

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the weight so I'm gonna put that down to

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something like point three and instead

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of constraining the head here let's go

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ahead and constrain the spine so I'm

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going to take the spine one and drag

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that in instead so now we have two multi

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aim constraints affecting two different

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parts of the body with eight different

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weight and that means that if we play

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and move around our target we can see

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that our entire body is now rotating a

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bit towards that target which makes the

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movement seem a lot more natural awesome

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and remember how I talked about that we

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could apply any kind of animation well

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if I go in to the animator now on this

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character and change to a walk animation

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it just works really cool now there of

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course many more constraints that we can

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apply to achieve different results one

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that I use a lot is the two bone I

00:10:04

constrict

00:10:05

this will allow us to have the arms and

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legs of our character probably bend to

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follow a target so you can just imagine

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how useful that is let's try to set up

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one for the right arm and we could of

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course add this inside of the same rig

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but since we're affecting a completely

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different part of the body let's go

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ahead and create a separate one so we'll

00:10:24

select our character look under

00:10:25

animation rigging and let's again press

00:10:28

rig setup as you can see this adds a not

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the rig layer to our rig builder and

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again and not the object and maybe we

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could rename these two to something

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other than rig one and two let's have

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the first one be head rig and the second

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one be arm rig then inside of the arm

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rig we can right-click and create an

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empty object let's rename this one to

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arm mover let's set a component corner

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animation rigging and select lead to

00:10:54

bone ika constraint now as you can see

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this text in three bones instead of just

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one that's because it will apply some

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natural movement so natural bending of

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the bones as long as we have three bones

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in sequence so in our case we need the

00:11:07

route mid tip to be the bones that make up our arm

00:11:10

let's go under our spine here under the

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neck let's find our left arm here we

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have the upper arm then the forearm and then the hand so

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let's start with the hand here and

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assign that to the tip we're going to

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assign the forearm to the mid and the

00:11:23

upper arm to the root of course we also

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need a source object as you can see the

00:11:28

target is currently none so let's go

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under our arm rig and arm mover here

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let's right click and create another

00:11:34

empty object let's rename this one to

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target and as you can see our target is

00:11:39

currently placed down here instead we

00:11:42

want this to be placed on the hand

00:11:43

because we are going to be moving around

00:11:45

our hand and arm with this object so to

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snap it to our hand we can simply select

00:11:50

the target then hold down control and

00:11:52

select the hand then go under animation

00:11:54

rigging and hit a line transform and as

00:11:57

you can see the target immediately snaps

00:11:59

to our hand we also want to display this

00:12:02

with a gizmo so let's go to the bottom

00:12:04

right corner and hit plus again we can

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choose an effector shape I'm going to

00:12:07

search for effector I'm gonna choose the

00:12:09

square root vector I'm gonna set the

00:12:11

size of this to something like point

00:12:13

three and there we go we now have a

00:12:15

square here that we can select and move

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around and finally let's go to the arm

00:12:19

mover and assign this target and that's

00:12:21

it if we now hit play we can see that

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while our character is playing an

00:12:26

animation our hand is now remaining in

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place and that means that we can

00:12:31

actually select this target object here

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and move around our hand even rotate it

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in any way that we'd like and our arm

00:12:38

will appropriately follow really really

00:12:42

cool and a cool tip is actually to move

00:12:44

the target while the game is running to

00:12:46

somewhere you think looks cool like here

00:12:49

and then just copying the placement by

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right-clicking on the transform and

00:12:53

selecting copy weld placement we can

00:12:56

then stop playing and go to the target

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right click on the transform and hit

00:13:00

paste world placement so if we hit play

00:13:03

indeed the arm goes right up and we can

00:13:06

use this for all kinds of things like

00:13:07

placing the hands correctly when holding

00:13:09

a weapon now in our case this is what we

00:13:12

want but sometimes we don't want the

00:13:14

hand to snap to the target sometimes we

00:13:16

want to just keep that offset and in

00:13:18

that case we can go under the arm mover

00:13:20

go

00:13:21

settings and under maintain target

00:13:23

offset we can choose whether to do that

00:13:25

on position rotation or both just

00:13:28

something that's good to know there and

00:13:29

again we can adjust this using the

00:13:31

weight slider imagine for example that

00:13:33

all the skeletons are gathering and they

00:13:36

want to check if everyone is present

00:13:37

John are you there of course you can

00:13:41

change the weight and position through

00:13:43

script you can change it through the

00:13:45

animation window and everything even

00:13:48

works with timeline now as well so you

00:13:50

can just imagine the possibilities and

00:13:52

the good thing is that animation rigging

00:13:54

runs on jobs so it's very performant one

00:13:58

thing to note is that because it runs on

00:13:59

jobs

00:14:00

you shouldn't reassign targets while the

00:14:02

game is running so if you need to change

00:14:04

between following different objects I

00:14:06

would recommend creating a script that

00:14:08

just moves the target to the right

00:14:10

object and of course from here it's up

00:14:12

to you to start playing around with

00:14:13

adding different constraints as you can

00:14:16

see there are a lot to choose from

00:14:17

luckily they're all really well

00:14:20

documented well of course have a link to where you

00:14:21

can learn more about them in the

00:14:23

description another thing that is good

00:14:24

to know is that multiple constraints

00:14:26

within a single rig applied based on

00:14:29

their order in the hierarchy so if

00:14:30

you're working with multiple constraints

00:14:32

in one rig the top one will be applied

00:14:34

first in our case here that's the

00:14:36

heading and then the chess team gets

00:14:38

applied the order of the rigs however

00:14:40

are based on the order of the rig layers

00:14:43

in the rig builder so under a rig

00:14:45

builder component in our character here

00:14:47

we can change the order of individual

00:14:49

rigs and if you need some good examples

00:14:51

on how to use some of these constraints

00:14:53

you can simply go to the package in the

00:14:55

package manager and here we can look

00:14:57

under samples let's import these and

00:14:59

this will create a unity folder here

00:15:02

with some constrained samples and if we

00:15:04

open up the scenes folder we can see

00:15:07

that there are lots of examples for the

00:15:08

different ones of course if you're using

00:15:10

Europe Eli key you might have to update

00:15:12

some of the materials we can do that by

00:15:14

going edit render pipeline Universal

00:15:16

render pipeline upgrade project

00:15:18

materials to universal and hit proceed

00:15:20

and then everything should show up and

00:15:22

as you can see here's an example of two

00:15:24

bonide k one of the multi aim one for

00:15:27

blending one for I K on an entire chain

00:15:30

of bones one for parenting if you want

00:15:32

to have objects follow your

00:15:34

and the list pretty much goes on as you

00:15:37

can see it can get pretty crazy awesome

00:15:39

and that's pretty much it for this video

00:15:41

if you enjoyed it make sure to subscribe

00:15:42

and ring the notification bells so don't

00:15:44

miss the next one well of course that

00:15:46

links to where you can learn more about

00:15:47

animation rigging in the description

00:15:48

including a TDC talk on some more

00:15:50

advanced use cases on that thanks for

00:15:53

watching and I will see you in the next

00:15:54

video thanks to all the awesome patreon

00:15:56

supporters who donated in May and

00:15:58

especially thanks to face Samara fire

00:15:59

lost to violence locked forever replica

00:16:01

studios na'vi ninja SOT Mike Jason

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Narita SKU

00:16:05

Luna set piano satin black Donna team

00:16:07

Cascone 10 - Sam Jacob Sanford no he was

00:16:10

sake mug and 20 rod Gregory Pierce

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Michael Cobb of the mighty Zeus Owen

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Cooper as in the Pierce Erasmus and

00:16:16

serious mode you guys Rock

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Let's create procedural animations using Animation Rigging! ► This video is sponsored by Unity. ● Learn more about Constraints: https://docs.unity3d.com/Packages/[email protected]/manual/ConstraintComponents.html ●GDC talk on Animation Rigging: https://www.youtube.com/watch?v=XjMKbElVNmg ● Download the Skeleton: https://assetstore.unity.com/packages/3d/characters/creatures/dungeon-skeletons-demo-71087?aid=1101lPGj ● Download the Knight: https://assetstore.unity.com/packages/3d/characters/humanoids/strong-knight-83586?aid=1101lPGj ···················································································· ❤️ Donate: https://www.paypal.com/donate/?hosted_button_id=VCMM2PLRRX8GU ► Join Discord: https://discord.com/invite/brackeys ● Website: https://brackeys.com/ ● Twitter: https://twitter.com/BrackeysTweet/ ● Instagram: https://www.facebook.com/unsupportedbrowser ···················································································· ► All content by Brackeys is 100% free. We believe that education should be available for everyone. ❤️ Donate: https://www.paypal.com/donate/?hosted_button_id=VCMM2PLRRX8GU ···················································································· ♪ "ES_Dress Code_Black - oomiee" by Epidemic Sound

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