Re: [Algorithms] Collisions with VIPM

[Mark W. <mwa...@to...>]

The OBB tree is used for coarse collision detection - a single OBB may even
be enough, depending on the shape of your object ... it depends what form of
collision detection you need - do you need polygon level or just rough OBB ?

Perhaps you could maintain a convex hull generated from the VIPM mesh every
so often, which may be good enough for your needs ?  I believe Stan Melax
has done some work on dynamic reduction of the convex hull too ... check out
his site (sorry, don't have the link at the mo').

Mark

----- Original Message -----
From: "Oscar Blasco" <tr...@te...>
To: <gda...@li...>
Sent: Friday, August 04, 2000 9:06 AM
Subject: Re: [Algorithms] Collisions with VIPM


> Ok, when I said *desired polys* I was thinking on fewer polys, but it can
> cause object to collide with nothing (aka air...). I'm not sure what you
> want to say with using OBB's... divide the VIPMesh in subchunks and make a
> tree of OBB's to quickly skip parts of the model?
>
> Charles Bloom wrote:
>
> > Or, even better, using a static version of the mesh with *fewer*
> > polys.  Better still, use a sphere-tree or OBB-tree fit to
> > the mesh with roughly 100 spheres and/or OBB's.
> >
> > At 12:24 AM 8/4/2000 +0200, you wrote:
> > >Hi,
> > >
> > >How can be done fast collision detection with VIPM when it's always
> > >changing its morphology?, using an static version of the mesh with all
> > >desired polys?
> > >
> > >
> > >_______________________________________________
> > >GDAlgorithms-list mailing list
> > >GDA...@li...
> > >http://lists.sourceforge.net/mailman/listinfo/gdalgorithms-list
> > >
> > >
> > --------------------------------------
> > Charles Bloom           www.cbloom.com
> >
> > _______________________________________________
> > GDAlgorithms-list mailing list
> > GDA...@li...
> > http://lists.sourceforge.net/mailman/listinfo/gdalgorithms-list
>
>
> _______________________________________________
> GDAlgorithms-list mailing list
> GDA...@li...
> http://lists.sourceforge.net/mailman/listinfo/gdalgorithms-list