Hi Tim!

That's some nice rollin'.

I think the AI-POV-Game you're referring to is the PushBall game I made in 
2000 (http://runevision.com/3d/anims/#34). I can't remember the technical 
details, but I think I did the rolling by storing two vectors representing 
two local axis for the rolling ball (like the x and y axis) and whenever the 
ball moved in a direction d, I'd rotate the two vectors around an axis 
perpendicular to d and parallel to the ground. I'd calculate the third local 
axis from the first two, and apply the three to the ball in the form of a 
matrix transform.

If you've done it some different way, I'd be curious to hear how. :)

Rune
-- 
3D images and anims, include files, tutorials and more:
rune|vision:  http://runevision.com
POV-Ray Ring: http://webring.povray.co.uk

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