// inputs to create combination matrix:
//
// mat3d scale = {
//     2, 0,   0,
//     0, 3.3, 0,
//     0, 0, -7.2
// };
//
// 45 deg around 0,1,0
// mat3d rotation = {
//     0.7071067811847432,  0.0000000,  0.7071067811883519,
//     0.0000000,           1.0000000,  0.0000000,
//    -0.7071067811883519,  0.0000000,  0.7071067811847432
// };

// r*s
mat3d transform = {
    1.41421456236949, 0,    -5.09116882455613,
    0,                3.3,  0.0,
    -1.41421356237670, 0,   -5.09116882453015
};
polardecompose(transform, mat3d@rotation, mat3d@symm);
