[Bf-committers] cloth project ..

[zaz at visi.com]

bjornmose wrote:
> 1. which ODE solver concept is running ( .. me hopes a implicit euler or
> better .. and if i will pirate it over to SB :) )
> 
We currently have one solver that implements explicit euler, middle point
and runge kutta.  Implicit is on the list of things we'd like to do, but
not a top priority at the moment.  You can choose which you want in the
UI right now, but that may or may not carry over to release depending
on what we find when we're playing with it in a more final form.

> thinking ... k-DOPs ..... thinking ... k-DOPs (dramatic..pause&dup) may
> be an option for render hit detect too.
> 
It seems pretty fast and a lot of the implementation is pretty generic.
Genscher and I have spoken about how some of the work we've done on the
cloth modifier might be useable by other parts of blender.

> too late .. too tired
> but anyhoo
> zaz,genscher put your work visible to patch tracker or email to me ..
> i'll do a review ASAP
> 
If you're in a rush, I can set you up, otherwise we're trying to
finish up on collision response so we have a more complete package
to be reviewed.  We might have collision response done tomorrow
(Monday), but I think Tuesday or Wednesday is a better day to
bet on.

What we have now is a partial implementation of one described by
Provot in his paper "Collision and self collision handling in
cloth model dedicated to design garments."  We may not implement
all that is described in that paper, but we do need to get friction
working properly and get it working properly with moving and/or
deforming collision objects.  What we have now works fine for
dropping pieces of cloth on cubes and such, but there's no sliding
when there should be and it isn't working now with collision meshes
being deformed by armatures and such.

--
Todd Koeckeritz, zaz at visi.com

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