FK --> IK Leg Switching and Foot Dependencies

Artistic Support Animation and Rigging
1

Hello. Thanks for reading.
FK upper leg has Copy Location Constraint and Copy Rotation Contraint with the IK Upper Leg.
FK lower leg has Copy Rotation Contraint with the IK Lower Leg.

??What bones of the of the FK foot should have a … Copy Rotation Constraint … Copy Location Constraint.
If Any??

Rolling feet bones are the parent to … and affect the placement of ik… and I have not found much material on them.
Even a simple IK foot can easily have two deform bones.
Some IK foot bones are to affect the constraint and are non deform bones

I know its common practice for the
upper fk leg to copy location and rotation of the IK
lower fk leg to copy rotation
How about
fk foot bone?
fk toe bone?

I have some general success with a small amount of testing.
The local space to local space area needs work.
I do not know what rotation is actually being copied … the visual constrained rotation or not.

Fancy foot in this thread denotes …
the rolling on heel then roll on ball
via constraints foot.

2

Typically, I have an ik heel bone and an ik toe bone and the fk heel bone and fk toe bone copy the rotation of these bones. When creating a rig, I create the fk bones first, then when I start with the ik set, I duplicate the the fk set, then start adding all the extra mechanism bones and constraints to create the ik setup. If creating the rig this way, then there is no need for copy location contraints on the fk upper leg, as both the fk & ik upper leg will have the same parent bone. Unless you are doing some sort of crazy cartoon character rig, then I wouldn’t ever really see someone moving the upper leg bone, only rotating it.

I’ve just updated my Joe rig to work with blender 2.60a, link is below, if you want to look at it…

Randy