[ODE] Large trimesh triangles
hplus-ode at mindcontrol.org
Wed Jan 19 09:06:28 MST 2005
> I've seen references to this problem on the list several
> times. Out of curiosity, is there some good reason why
> this should be the case? It seems to me that collision
> between small geoms and large triangles should be roughly
> equivalent to collision between geoms and planes, which
A plane is very well defined using its normal and a distance.
The collision test is typically just a dot product along the
A very large triangle, however, uses more math, and thus has
more opportunity for screwing up WRT precision.
That being said, if a triangle is size 100, and the collider
is size 1, I wouldn't expect a lot of trouble. If the triangle
is size 10,000, I think you would start to see wierd behavior,
as you're getting into a relative size difference that's hard
to represent in a 32-bit float.
More information about the ODE