[ODE] Trimesh problems
gcarlton at iinet.net.au
Mon Jan 9 16:51:06 MST 2006
The standard Trimesh code has some problems - for example, colliding
objects with a completely flat trimesh will end up with many
non-vertical contact normals. This occurs because the flat triangles
try to push the sphere "away" towards an edge, sometimes with almost
horizontal normals. Its unworkable in its current form, and I can't see
how anybody uses it without hacking away into the code in ODE (as I did).
Anders Olofsson wrote:
>Well, I did my little test, download it here (254 kb, source and windows
>Steering: W,A,S,D and mouse
>Toggle wireframe/fill: F
>3 different scenes: 1, 2, 3
>Scene 1: just a plane (normal 0,1,0)
>Scene 2: 2 large triangles (normals 0,1,0)
>Scene 3: 2 small triangles (normals 0,1,0)
>In scene 1 the 2 spheres stop bouncing, in scene 2 the spheres starts to
>jump after a few seconds and scene 3 seems to work like the plane scene.
>So large triangles is causing some problems. Haven't someone else
>discovered this?. I'm probably doing something wrong!, but what?
>Thanks for helping!
>ODE mailing list
>ODE at q12.org
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