[ODE] Trimesh problems

Anders Olofsson anders.olofsson at biologigrand.ac
Mon Jan 9 12:20:07 MST 2006


Hi!,

In my litte test I have this:
dWorldSetCFM (world,1e-8f);
The ERP I dont change, probably some default value.

Only got 2 triangles in the test, they dont look degenerated! :) (check 
wireframe)

True, its single precision, but the spheres that are jumping in the movie 
is dropped at origin. In the test too. But I'll check this (switching to 
doubles).

Thanks for your help!

--Anders Olofsson

At 20:00 2006-01-09, you wrote:
>A few things come to my mind:
>1. What are the global ERP / CFM parameters set to ? Did you try to
>tweak them too ?
>2. Make sure you're filtering out degenerated triangles in your
>trimeshes, because ODE isn't doing it, and last time it caused some
>severe bugs in my application.
>3. My bet: in your video, you seem to have a pretty huge terrain. What
>scale units are you using ? Are the spheres dropped very far from the
>origin by any chance ? If so, i do think it's a float 32 precision
>problem, and you might verify this easily by switching ODE to double mode.
>
>Cheers,
>
>F. Brebion
>
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