public void removeCollisionObject(PhysicsCollisionObject obj) { if (obj instanceof PhysicsGhostObject) { removeGhostObject((PhysicsGhostObject) obj); } else if (obj instanceof PhysicsRigidBody) { removeRigidBody((PhysicsRigidBody) obj); } else if (obj instanceof PhysicsCharacter) { removeCharacter((PhysicsCharacter) obj); } }