/// <summary>
/// Casts a ray downwards from the given kart
/// </summary>
/// <returns>The ray result callback</returns>
private DynamicsWorld.ClosestRayResultCallback CastRay(Kart kart, float rayLength, DiscreteDynamicsWorld world) {
// get a ray pointing downwards from the kart (-Y axis)
Vector3 from = kart.ActualPosition + kart.ActualOrientation.YAxis; // have to move it up a bit
Vector3 to = from - kart.ActualOrientation.YAxis * (rayLength + 1); // add 1 to compensate for the "moving up" we did to the "from" vector
// make our ray
var callback = new DynamicsWorld.ClosestRayResultCallback(from, to);
// we only want the ray to collide with the environment and nothing else
callback.CollisionFilterMask = rayFilterGroup;
world.RayTest(from, to, callback);
#if DEBUG
//MogreDebugDrawer.Singleton.DrawLine(from, to, ColourValue.Red);
#endif
return callback;
}
