/// <summary>
/// 求发射光线
/// </summary>
/// <param name="inDirection">入射光线</param>
/// <param name="inNormal">法线</param>
/// <returns></returns>
public static Float2 Reflect(Float2 inDirection, Float2 inNormal)
{
return(inDirection - Float2.Project(inDirection, inNormal) * 2);
}