All language subtitles for 07_13_character_rig_drivers

- [Zach] In this video,

let's add the face rig for
our character using drivers.

So before we can add any drivers here,

we need to create some
shape keys for the face,

which we later on can control
using the two bones here

in front of the face.

So let's select the character.

Let's hide the rig here for a moment,

and let's go over to the object data tab,

and let's open up the shape keys,

and first of all,

let's create the basis shape
key, which we always need,

and then let's add additional shape keys

for different facial expressions.

So let's just create
some empty shape keys,

which we then later on edit in edit mode.

So let's add a few ones over here

and then let's rename them.

So these are all we need.

Mouth O should be something

with the mouth in a kind
of kissing position.

Then we have the happy mouth,
the sad mouth, the open mouth.

Then the eyes closed, eyebrows
up, and eyebrows down.

Now, when we go over to edit mode

and we select any of these
shape keys, we can edit them.

So, and currently I have x-ray enabled.

I think I don't need it right now.

Let's press L above the
six cubes of the mouth.

Let's have a look from the
front press S for scaling,

and you can see something
weird is going on

because I have this arm here selected.

So with shift in L let's de-select this,

then this should work better.

And then let's scale this down.

Something like this,

maybe a bit further, something like this.

Then we have the happy mouth.

For that, first of all,

de-select everything, then
let's select this side here,

and I think here let's set the pivot point

to 3D cursor, shift
right-click pull it here

and then we can better rotate this.

Let's remember the rotation degrees,

which we can see in the top left corner,

maybe a negative 25, something like this.

And then let's do the same thing

on the other side, 25 degrees.

Now he's pretty happy.

Now let's make him sad,

which is the exact same
for the opposite direction.

Something like this.

Then for the mouth open,
here it gets a bit trickier.

So let's use the vertex
selection and enable x-ray.

Then make sure that we
only select the lower part

of the mouth, press G Z,

make it wide open and maybe let's move

the chin area down as well.

Something like this.

Then we have the eyes
closed, de-select everything.

Then let's select the
lower part of the eyelids

and just cover the entire eyes here.

Something like this, then the eyebrows up.

Let's see if X symmetry works here.

Let's press L, yep, works fine.

Let's go back to median
point for the pivot point

and rotate this up and
for the eyebrows down

rotate this down so he can look

like sad and angry or evil.

So, and this is all we need

in order to get started with our drivers.

If I now go back to object mode,

we have these values here,

which we now can control
with that drivers.

Let's unhide the rig over here,

and in order that the rig
is not always in the way

let's select it, go to
the object tab here,

viewport display and change
the display as to wire.

Then we can see through it

because I have disabled x-ray over here.

So now let's add the drivers to our rig.

First of all, down here, let's switch

this to the drivers editor.

Then for our rig,

let's enable the axis

and now we need to define

what we want to do.

Let's go to post mode,

let's press N to open up the sidebar.

And now I want to change the position

of this bone here to control the mouth.

And I want to change the
position of this bone here

to control the eyelids and the eyebrows.

And as you know, we have
three different directions

where we can go and I want to apply

one action to each of the directions.

And here I want to do what makes sense.

For example, if I move
this along the x axis,

we want to get the O mouth.

If I move this along y

it should open up the mouth,

and if I move this along z,

it should be happy and sad.

here. When I move up and down,

it should blink with the eyelids,

and if I go forward and
backwards, or in this case,

you can also decide to go left and right,

to move the eyebrows up and down.

So let's start with the mouth down here.

First of all, let's check how
far we can go up and down.

Maybe let's even go to edit mode first

and move this up a bit so the bottom

of the bone is exactly positioned

at the height of the mouth,

and here, maybe let's go
between the eyelids here.

So, back in pose mode.

I think let's take some clear values here.

Something like 0.05 or negative
0.05 should do the job here

so we can add some constraints later on

to make our life a bit easier.

So, first of all, let's
start with opening the mouth.

So we want to go into a
negative 0.05 along the y-axis

of this bone, which is
called rig_male_mouth.

Let's go to the character here.

Let's go to mouth open,
right click on this value,

add a driver, averaged value, here we want

to have the Rig male

and simply search for mouth

to find the specific bone.

And here we want to move
along the Y location

in the local space.

Then as we have learned in the last video,

let's change this to no auto
snap, select everything,

right click and set the
interpolation mode to linear.

Now we can define the
start and end position.

The shape key values always
have a value from zero to one.

If we are not changing the
min and max range down here.

So that means zero is
disabled and one is enabled.

Let's press N down here
and in the F curve tab

the value for the end
key frame should be one,

and here we wanna move negative 0.05.

That means if I now move
this down, negative 0.05,

you can see the mouth opens
up, pretty straightforward.

Then we want to go into the x direction,

positive 0.05 to make the O mouth.

So let's do the same.

And actually let's try something.

Right click here, copy driver,

and here on the mouth or right-click

and click on paste driver.

Now we also have the mouth O,

with everything set up
already here in the driver,

because we are using the same bones,

but in this case, we want to
move along the X location,

let's hide the most open here

so we can better see what's going on.

And the end position
should be positive 0.05.

And we want to have a value of one then.

That means if I now go positive X,

you can see it is working.

And now we can already do
something funny like this.

Now let's go in the Z direction,

0.05 positive for the happy face

and negative for the sad face.

That means again, here we can simply

go to the happy face and
again, paste the driver.

Then let's disable the O driver

and go to the mouth happy
and here for the driver

we want to use the Z location.

Then for the F curve
for the last key frame,

we want to have positive
0.05 and a value of one.

And then let's do the sad
face immediately here.

Let's paste the driver.

Make sure this is selected, again here,

we want to have the Z location.

Make sure to select the right
key frame here and here.

Negative 0.05 is correct
with a value of one.

That means if I now move
this along Z positive 0.05.

He's happy because the bone gets closer.

And if we are going into
the negative direction,

he is pretty sad.

So and now we can fully control

the mouth here by randomly
moving around the bone here.

Now let's quickly do the
same thing for the eyes.

Here, again, I want to go
negative y 0.05 to close the eyes.

So let's again,

simply paste the driver here
at eyes closed, paste driver,

then let's go to eyes closed
and adjust the driver.

Here we want to have the y
location, which is correct,

but we want to have the eyes
bone and not the mouth bone.

Then let's hide all the other ones.

Select the end key frame
here, go to F curve,

and this actually should be negative 0.05

with a value of one.

That means if I now move this down,

the eyes are closing as
you can see, pretty cool.

And now I want to do the
same thing as for the mouth.

When I move closer, we
have the eyebrows up.

And when I go away, we want
to have the eyebrows down.

So here let's actually copy
the driver for the eyes

because it's using the same
bone as for the eyebrows.

Here, let's paste it and
here let's paste it as well.

And then we can quickly change

the values over here for eyebrows up.

We want to go Z positive.

That means the driver here

we need to change this to the z location

and a positive 0.05 value.

And for this one here,
it should be negative.

And we also want to use the Z location.

And now if I select this
lock this along Z go closer,

eyebrows are going up, and if I go away,

eyebrows are going down.

And in this way, I can also
fully control the eyes here.

And since these two bones are
parented to the head bone,

they will always stay in
front of the character's face.

So this down here, we can switch
back to the asset browser.

Let's move this down,

and there's just one final thing to do.

Let's add some constraints.

So remember here we are
just moving up and down

and Z direction, we are not using X.

So here let's add a limit
location constraint.

Let's use the local
space, enable everything,

and we only need negative 0.05 for Y

and negative 0.05 for Z and positive 0.05.

And now if I move this, you can see,

I can only move this
in this specific range

and let's do the same thing down here.

It's at the limit location,

local space,

and here we need Y only negative,
Z positive and negative,

and X only positive.

That means let's enable everything.

Minimum is at zero X maximum is at 0.05.

Y maximum is at zero, and Y
minimum is at negative 0.05.

And for the Z axis, we
need both negative 0.05

and positive 0.05.

And now this works as you can see.

You can see when I make the O mouth

and move this down, we
have a bit of clipping.

So what I would suggest
let's select the character,

go to the object data
and select the mouth O.

Go to edit mode.

And simply let's select
this face over here

and this one and move them
a bit further to the inside.

And then this shouldn't
be a problem anymore.

Yeah.

Now it works perfectly
fine, as you can see.

So now let's disable
the axis for the bones

and we have a fully working face rig.

As you can see, of course,

this is super simplified.

Ah, dammit, as you can see,

it's still not working perfectly fine here

when I open and laugh.

So maybe when the happy
shape key is enabled,

we should also move these
two a bit to the inside.

Something like this.

Let's check this again.

Set one is working good.

Yep, now it looks good.

Now let's reset the position here

and now everything is working as expected.

Yeah.

And that's about adding a
simple face rig to our cubic

world's character, and as
always, don't forget to save.