public static Matrix3x3 operator -(Matrix3x3 a, Matrix3x3 b)
{
#if IMOET_UNSAFE
Matrix3x3 m = new Matrix3x3();
UMath.MassSubtract(a.Ptr, b.Ptr, m.Ptr, 9);
return(m);
#else
return(UMath.SubtractMatrix(a, b));
#endif
}