Easy question about Ray Test

[william]

Hi I'm new with bullet, I started to play around with ray testing and such. I tried to get collisions between a ray and the objects in the world this way:

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btCollisionWorld::ClosestRayResultCallback ray( from, to );

Its working allright, but I need to know what objects have been hit by the ray. How can I do this?

[william]

No one knows?

[Nacho]

In btCollisionWorld::ClosestRayResultCallback there is a member called m_collisionObject (really is member of RayResultCallback class). It tells you the collide object.

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btCollisionObject* pColObject=ray.m_collisionObject;

When you get it, you would want know if it is a rigid body, a ghost...:

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if( pColObject->getInternalType()==btCollisionObject::CO_RIGID_BODY)
{
    btRigidBody* pRigidBody=static_cast<btRigidBody*>(pColObject);
}
else if( pColObject->getInternalType()==btCollisionObject::CO_GHOST_OBJECT)
{
    btGhostObject* pGhost=static_cast<btGhostObject*>(pColObject);
}

Nacho.

[william]

Thank you very much