I want to make a race game and My terrain is not flat.

my problem is how can i check my car collision with my car exactitude

i try this ,but i cann't see the terrain

NxOgre::Resources::ResourceSystem::getSingleton()->addMeshAs("file://../../media/models/terrain.mesh", "villeCollision");
NxOgre::Resources::Mesh* collisionMesh = NxOgre::Resources::ResourceSystem::getSingleton()->getMesh("villeCollision");
NxOgre::Actor* collisionActor = mPhysiX->mNxScene->createActor ( "Collision Mesh", new NxOgre::TriangleMesh(collisionMesh), Vector3(0, 0, 0), "static: yes");


Because you're loading the terrain's physics, but not the actual mesh that Ogre uses.

thank you your reply,i want to cheak my terrain collision with my car and not use floor.