"Greg M. Johnson" wrote:
> 
> > About that ball: don't forget the balls in that animation are fairly
> > light, the surface tension effect is fairly strong in means of bodies
> > sticking to the surface in such situations.  Without it the balls are
> > simply jumping back.
> 
> But it:
>     1) hits the bottom: suggesting heavy density

No, just high kinetic energy.

> 
> When the looks don't match expectations of reality, change your parameters.

The model should be changed in that case.  Could be that stronger drag in
water is a convenient model for surface tension.

> If you're not applying the drag instantaneously but rather frame by frame,
> you lose the 'real' effect of the forces on your particle!

The drag is part of the movement equation just like all other forces.  

Christoph

-- 
POV-Ray tutorials, IsoWood include,                 
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Last updated 05 May. 2002 _____./\/^>_*_<^\/\.______

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