>Nice!
Thank you!


> There is something odd about the way the fold moves toward the right hand
corner, but I liked the way it pushed the cloth above it  out of the way.

My cloth algorithm works with (very stiff) springs between 'atoms'. That odd
movement at the corner is caused by the fact that at the center side of the
fold there are more pressed (pushing) springs than at the corner side. This
causes some sort of 'imbalance' so the fold is pressed to the corner. I have
some ideas about using a very different cloth model.


> What is the speed decrease when using your internal collision detection?

Not sure what you mean by this. Possibly you're talking about some energy
loss when atoms collide or bounce. Well.. They actually NEVER collide, since
them atoms don't have no volume or width. They're infinitely small like

When 2 atoms come too near eachother I simply put a spring between them that
pushes them apart. That's quite simple in fact. Managing the friction is
something else because the friction depends on the kind of material, the
structure of it. Possibly it depends on the angle of attack too.

(I built some bounding box trick in order to detect near atoms very fast.
I'll start rendering some more animations showing just those boxes and put
them on http://geitenkaas.dns2go.com/experiments/. I'll let you know when
they're up.)

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