public static mat3 operator *(mat3 a, mat3 b)
{
mat3 res = new mat3(), trans = b.Transpose();
for (int i = 0; i < 3; i++)
{
res[i] = a * trans[i];
}
return(res);
}
public mat3 Transpose()
{
mat3 res = new mat3();
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
res[i][j] = this[j][i];
}
}
return(res);
}