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Na, I don’t mind it being resurrected if your still having questions, it can be really hard to get a grasp of.
Yes...Handkey= doing mostly IK (reach 100%) animation and edit those keys and your good....ok.
Ok let me try and answer a few things, part of it is in the doc, where I talk about reach vs. pinning.
How you pose/move/manipulate the character is what Pinning controls, that is it, that is all pinning does, it adjusts how the rig reacts to the moving of ctrls around…
How the animation looks, the interpolation between keyframes and the key poses is what reach or your choice of IK position based motion or FK, hiearchy, rotation based interpolation.
What does that mean…
in simpler terms, do you wan arcs in your animation for free or do you want linear straight line movement from one keyframe to the next.
with me? If I keyframe the arm to lift and wave I will want this for the most part to be all FK for nice smooth arcs and less keyframes.
MotionBuilder always snaps FK to IK and keys both of them every time you keyframe. (watch the part of the dvd/read the notes on control rig settings and turning off aligned control rig rig on the control rig properties to really understand what is happening between the keys.
So you then just have to make the choice, do I just pose/key and touch up motion with more keyframes with all IK arms, body, or do I want to only have IK on for the feet and edit a regular FK set of keys.
The cool think is you can pose and keyframe with all IK and then just set the reach to 0 and watch as all the missing arcs appear in your animation because your allowing the animation that the FK skeleton is showing its motion.
Spicey 16 February 2010 09:23 AM
I know you hate to see this old thread resurrected again, but I am still trying to get my head around this. I am making some progress in cementing the theory though - I think. I have purchased the Character’s tool kit and finding it does help a lot.
My comment and questions are:
1)I am doing hand key animations for my character and I rarely if ever key on just the FK (skeleton, right?). So when I go over to fcurves I don’t usually have trouble finding what I need.
2) So my question is - what or when or why would you key just in FK? Am I missing something really helpful here? *G*. I nearly always key in full body, rarely in body parts unless needed, and I dont think I have ever need to key in just selection. I do pin the feet in T/R often and hands occassionally - is effector pinning using FK then?
3) I am a novice at this, so please excuse me if the questions are rudimentary.
4) Sometimes I think I just see IK/FK/100%/0% and tune out before my head explodes!
Thanks for you time and understanding;
Spicey
Brad Clark
Co-Founder: Rigging Dojo-Teaching the art and science of character rigging
Author: Inspired 3D Advanced Rigging
The Character Animator Toolkit for Motionbuilder :available now:
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