What I want to do is, given an Object (with rotationQuaternion, side vector...), I want to align it to a target point.
For a spaceship, I want the cockpit to point to a target.
Here is some code I have ... It's not doing what I want and I don't know why...
if (_target._ray.Position != _obj._ray.Position)
{
Vector3 vec = Vector3.Normalize(_target._ray.Position - _obj._ray.Position);
float angle = (float)Math.Acos(Vector3.Dot(vec, _obj._ray.Direction));
Vector3 cross = Vector3.Cross(vec, _obj._ray.Direction);
if (cross == Vector3.Zero)
cross = _obj._side;
_obj._rotationQuaternion *= Quaternion.CreateFromAxisAngle(cross,angle);
}
// Updates direction, up, side vectors and model Matrix
_obj.UpdateMatrix();
after some time the rotationQuaternion is filled with almost Zero at X,Y,Z and W
Any help? Thanks ;-)
