Lonnie wrote:

> It took about 15 minutes of typing from the germ of the idea to the start of
> rendering, but before the first pixel was written I realized how messed up
> this would be.   No I don't mean the edge - that's  simple to fix.  I mean
> the fabric is only distorted in the y direction.  Perfectly elastic, not at
> all real world behavior.  A quick and dirty fix would be to "normalize" the
> intersections (nodes) of the crossing splines by estimating
> the real length of each x and z spline, then adjusting spacing by the mean.
>  I may render that version just for fun, and to test out some arrays I need
> later.  The right way to do this is tensor analysis.  Yipes!  Multilinear
> algebra, but doable.   Elasticity is a fourth rank tensor,  which relates
> stress and strain on the thread (and therefore stretchtng and warping.)
> Friction with the underlaying surface needs to be factored in,  as well as
> gravity, mass of the thread, and the dynamics of how the cloth landed in
> the first place, which is where I'll start with coordinate transformations.
>  Any thoughts and suggestions (HELP!) welcome .

I have hard that simulating cloth via a network of springs and masses is 
a fruitful way to go.  YMMV.

Regards,
John

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