RayGeometry vs AnyOtherType collision checking only?

Hi,

I would like to make OgreODE ignore collision checking between all geometry types except for RayGeometry vs AnyOtherType.

I'm calculating lightmaps using ODE's collision detection. Suppose I have lots of boxes placed on a plane. All of objects use trimesh geometry for example. I use the ray to check for shadowing, but...

If the boxes are penetrating the plane, ODE reports collisions between boxes and plane making the calculations last much longer. If I move the boxes slightly above the ground the calculations speed up greatly, because only Ray vs. others collisions are reported.

Is there a way to do that?

Think you should not use the standard collision method because it checks all objects against all others, instead you can test each model itself for collisions, there is a method like collisionTest or similiar, dont remember. Then you would have to test every ray against all other objects.

Thanks for the hint! It works perfectly now

It's pretty obvious I guess, but maybe someday someone will be looking for this, so:

int contacts = YourTestedObject->m_Geometry->collide( m_RayGeom );
return contacts > 0;

where:
m_Geometry - your object's OdeGeometry
m_RayGeom - OdeRayGeometry used for the test