One of the "innovations" in this model was that I allowed the nodes in the
cloth to be attached to other nodes with variable strength.

In this particular example each node is attached to its "horizontal" and
"vertical" neighbor with a very strong force 1e5, that is, for example, if
we have a mesh with points x(i,j) then x(i,j) will be attached to x(i-1,j),
x(i+1,j), x(i,j-1), x(i,j+2). This is because cloths resist very much to
stretching.

They also resist (not so much) to shearing and bending, so that's why I also
connected them diagonally, but in this way: x(i,j) is connected to
x(i-2,j-2), x(i-2,j+2), x(i+2,j-2), x(i+2,j+2). The force associated to this
connections was weaker.

I think this helped to improve the appearance of the cloth.


affected to any force, I fix their positions arbitrarily. In this case I
force them to be where I want, that's why we see the formation of the
creases.

I'm glad you liked it and I hope I was able to answer your questions more or
less satisfactorily (it's 1:29am!)

Take care,

Fernando.



news:3DD### [at] gmxde...
>
>

> >
> > [...]
> >
> > I hope you like it and I'll be happy to receive any
comments/suggestions.
> >
>
> Very nice.  Some more information about the used parameters would be
> great:
>
> - how strong bending stiffness did you use compared to the linear
> stiffness
> - how is the cloth attached at the top (it looks like at various points
> which move in both horizontal directions during the animation).
>
> I'm not totally sure but i think even on a polished ground the cloth would
> 'turn around' where it touches the ground when the movement reverses due
> to friction. Right now it always slides.
>
> Christoph
>
> --
> POV-Ray tutorials, include files, Sim-POV,
> HCR-Edit and more: http://www.tu-bs.de/~y0013390/
> Last updated 02 Nov. 2002 _____./\/^>_*_<^\/\.______

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