// Lerp
public void Lerp(ref SpriteColors from, ref SpriteColors to, float f01)
{
Color0.Lerp(from.Color0, to.Color0, f01);
Color1.Lerp(from.Color1, to.Color1, f01);
Color2.Lerp(from.Color2, to.Color2, f01);
Color3.Lerp(from.Color3, to.Color3, f01);
}