determinant method
Returns the determinant of this matrix.
Implementation
double determinant() {
final x = _m3storage[0] *
((_m3storage[4] * _m3storage[8]) - (_m3storage[5] * _m3storage[7]));
final y = _m3storage[1] *
((_m3storage[3] * _m3storage[8]) - (_m3storage[5] * _m3storage[6]));
final z = _m3storage[2] *
((_m3storage[3] * _m3storage[7]) - (_m3storage[4] * _m3storage[6]));
return x - y + z;
}