public void ChangeFrame(Direction d, float speed, bool gravity)
{
GObject.GameSprite.Image = Tileset.Clone(new Rectangle(32 * (int)frame * (!gravity? 0:1), 32 * (int)d, 32, 32), System.Drawing.Imaging.PixelFormat.Format32bppArgb);
frame += speed * SpriteSpeed;
if (frame >= 3)
{
frame = 0;
}
}