Fixing the foot

00:03

Now let's fix the foot. So it stays level as the leg animates.

00:08

So like the foot control

00:11

and then the foot IK joint

00:13

and simply use an orient constraint.

00:18

So now the foot stays in place planted on the floor,

00:22

which looks a lot more natural

00:25

and we can control the upper leg too.

00:28

OK? Now let's add in the hock functionality.

00:33

What we're going to do with this control is

00:35

use it to reposition the calf I care handle.

00:38

So we compose the lower leg

00:41

as you can see, simply moving, it is causing the foot to move.

00:46

So ideally, we need the ICA handle to pivot around the foot joint. Instead,

00:51

this will keep the foot steady and planted on the floor.

00:55

Press control NG. To create a new group,

00:59

we want the group to match the orientation of the hock control.

01:02

So add it to the selection

01:05

first, use match transformations to move the group to the control.

01:10

We now have the correct orientation.

01:14

Let's rename the group to haw

01:15

left control offset.

01:18

We now need to move it to the foot joint.

01:21

So add the joint to the selection

01:24

and this time just match the transforms.

01:27

So we maintain that orientation

01:30

there. The group's in position now and orientated correctly too.

01:35

And we can rotate from this point. Now

01:39

move the group. So it's parented to the calf driver joint.

01:43

We now need to remove these rotation values,

01:46

but we can't freeze them as we will lose the orientation.

01:51

So instead

01:52

just move the values down to the offset parent matrix section

01:56

like this.

01:58

Now the rotations are clean, we can connect them

02:02

using the hock control to drive them.

02:05

Next, move the calf I

02:07

handle into the hook control offset group.

02:11

If we now rotate the group, the lower leg moves but the foot stays in position.

02:15

Perfect.

02:17

OK. We now need to wire up the hot control. So it rotates the group

02:21

head back into the node editor

02:24

and clear it.

02:26

Bring in the hot control,

02:29

we need its translations

02:32

and then bring in the haw control offset group.

02:35

We need the group's rotations.

02:39

What we are going to do is make the translations drive the rotations.

02:43

Let's check what axis we need.

02:46

So if I move the hock control along the X axis,

02:50

we want the group to rotate like this. So around the Z axis,

02:55

so let's connect translate X

02:58

to rotate Z.

02:60

If we move the control, now

03:02

the lower leg moves

03:04

but in the opposite direction.

03:06

So we need to invert that value,

03:09

press tab

03:10

and create a multiply divide node

03:13

and rename this to hock left multi.

03:17

What a multiply divide node will do is basically take one value

03:21

and then multiply or divide it by another

03:25

simple as that.

03:26

Rather than using individual attributes, I'm going to connect,

03:30

translate directly to input one.

03:33

So all we're doing is grouping all those attributes together.

03:37

So translate X here

03:39

will be represented as input one X here.

03:43

This means we need the output X attribute here.

03:46

So connect that to rotate Z,

03:49

we can delete this now.

03:51

So at the moment, things look the same.

03:54

But what we can do is change the input to X value to minus one instead of one.

03:60

So the translation value is now being multiplied by minus one

04:04

which will invert it.

04:06

And the control now moves the right way.

04:10

What we can also do is use the node to make the leg move closer to the control.

04:16

Let's adjust this. So it's in the right position.

04:20

So minus two seems about right.

04:24

So remember what it's doing is it's multiplying

04:26

the hook controls translation value by minus two.

04:31

OK. That's better.

04:33

Let's look at the other direction.

04:36

So it looks like we need the translate Z attribute next.

04:40

OK. Let's check. The group

04:42

looks like we need it to control the X rotation.

04:46

So we need input one Z here

04:49

because this represents the translate Z attribute

04:53

and the output of this is output Z.

04:56

So connect that to rotate X

04:60

OK. So this time the direction is correct but the leg needs to move more.

05:05

We used minus two earlier. So let's try changing input two Z to two.

05:11

Yeah, that works. Ok. Good.

05:16

We can move the upper body and the leg follows.

05:20

We can also control the hawk too.