intersectOBB method

Vector3? intersectOBB(OBB obb, Vector3 result)

Performs a ray/OBB intersection test and stores the intersection point to the given 3D vector. If no intersection is detected, null is returned.

Implementation

Vector3? intersectOBB(OBB obb, Vector3 result ) {
	// the idea is to perform the intersection test in the local space
	// of the OBB.
	obb.getSize( size );
	aabb.fromCenterAndSize( v1.set( 0, 0, 0 ), size );

	matrix.fromMatrix3( obb.rotation );
	matrix.setPosition( obb.center );

	// transform ray to the local space of the OBB
	_localRay.copy( this ).applyMatrix4( matrix.getInverse( inverse ) );

	// perform ray <-> AABB intersection test
	if ( _localRay.intersectAABB( aabb, result ) != null) {
		// transform the intersection point back to world space
		return result.applyMatrix4( matrix );
	}
    else {
		return null;
	}
}