public override void sendMouse(vec2 current, vec2 oldmouse)
{
ArcBall ball = new ArcBall(new vec2(Width / 2.0f, Height / 2.0f), Math.Min(Height, Width) / 2.0f);
quat final = ball.rotation(tranform(oldmouse), tranform(current));
rotation = quat.Combine(rotation, final);
}
