vector ScreenToWorld(Vector2 Screen)
{

sx = Screen.X- (screenOriginPoint.X + screenOffset.X);
sy = Screen.Y - (screenOriginPoint.Y + screenOffset.Y);

return (Math.Round((sx / tileScreenWidth) + (sy / tileScreenHeight)) - 1,Math.Round((-sx / tileScreenWidth) + (sy / tileScreenHeight)));


}