need help with nulls

[cuboos]

Ok for a Wotw movie i'm doing i want to use nulls in the legs of my tripod but i don't know how to work them all i know how to do it file new null and thats it how do i get the nulls to act like the ones in the feet, hands, and hips of actors?

[itsjustme]

Nulls are like bones except you can't assign geometry to them. They are used as targets and controls. The legs of characters generally have a chain of bones that have a kinematic constraint on the end bone of the chain with the target being a child of the foot control null. There are more constraints applied, but that is the general idea.

 

Hope that helps.

[cuboos]

do you know of any tutorials that describes how to use them

[itsjustme]

Here is a very good leg tutorial...it doesn't have any nulls in it, but all you would do is replace the foot control bone with a null.

 

This arm tutorial has a null for the IK control...it's a good tutorial as well.

 

This page has those tutorials and several others you might find useful.

 

I made a face rigging tutorial that has some nulls in it here. It has a basic overview of constraints at the beginning as well.

 

Hope those help.