Rune wrote:
> andrel wrote:
> 
>>Have you thought about more complicated things, like
>>some flesh bulging out when a join moves? Simply because
>>of conservation of volume.
> 
> 
> No, I think the problem we are facing is complicated enough without
> considering these things.

You will need at least *something* - take, for example, an arm or leg of 
a human model: If it bends to the maximum allowed angle (let's say 170 
degrees), the upper and lower parts would intersect, which would look 
quite odd in an animation.
The easiest solution are IMHO morphs. If you'd have a morph for the 
fully bended arm, you could apply it partially before actually applying 
the rotation:

E.g, if the maximum angle is 170 degrees, and you bend it 50% (85 
degrees), apply 50% of the morph, then rotate the resulting points 
around the joint for 85 degrees.

Once implemented, this method can easily be used to simulate muscle 
movement too.

I've made some experiments a while ago, here's an example of what I mean:
http:/www.jpatch.com/old/arm.mpg

I'm about to implement it in my modeler (which used a spline based 
approach and outputs bicubic patches to pov-ray), and use an xml-style 
file format...

-sascha

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