> Slime: His arms bend up because if they did not, his forearms would have
to
> change length, or something; try to touch your sternum with the tips of
you
> finger, with your elbow at your side --- impossible. Your elbow must be
away
> from your body to  let your hands do that. This is why IK is good, it
shows
> these things without my having to specifically enumerate them.

Hmm. But for every position of the hand, there is a full circle where the
elbow can be - the set of points elbow's length from both the hand and
shoulder. What's to keep the elbow from always being at the lowest point (or
for that matter, the highest point) on this circle? (Even if you consider
the torso blocking movement, and the limitations on arm positions in real
life, there are a lot of choices for elbow position for any given hand
position.)

 - Slime
 [ http://www.slimeland.com/ ]

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