Adding more options to the arm IK control

00:03

With the arm pole vector control,

00:06

I'll use its correct name. But you know what I mean?

00:08

If I refer to it as an elbow control,

00:10

we have just two options when it comes to space swapping.

00:14

So how do we approach the hand? Which has four?

00:17

Well, it's very similar to the elbow control but also a bit more complicated.

00:22

So I'll try my best to take it step by step.

00:25

But if you're not sure,

00:26

please feel free to look at the source files and pick

00:29

apart the rig so you can see what's going on.

00:32

So let's jump back into the node editor.

00:36

So we have these options here which represent these controls,

00:40

the cog,

00:41

hips

00:42

and arm root control.

00:44

So just as we did with the elbow, we need a locator for each of these controls.

00:49

So we can maintain that offset.

00:52

Duplicate the arm

00:53

space position, locator

00:56

and move it out of the hierarchy.

00:59

Let's rename this to cog left swap

01:02

polls.

01:04

Now duplicate it twice

01:07

and then rename these. So hips

01:11

and clavicle

01:14

select those and then select the arm IK control.

01:17

Now use the match transformations tool to move the locators

01:21

to the arm IK controls position.

01:23

Remember that the locators can be anywhere you like.

01:26

So if there is a better position,

01:28

you or the animator can move them later.

01:31

OK. These are all in position.

01:34

Now, we need to parent the locators to the controls, the hand will need to follow.

01:40

So the cog locator is pared to the cog control

01:44

the hips, locator is pounded to the hips control

01:48

and the clavicle locator is parented to the arm route control.

01:53

I'm referring to it as a clavicle because

01:55

this will ultimately control the clavicle joint.

01:59

I'll just show you these in the outliner too.

02:02

There you go.

02:05

So these locators will move with the controls. They are parented to.