Function matrix4x4to3x3
Converts 4x4 matrix to 3x3 matrix. 3x3 matrix defaults to identity
Example
Matrix4f m1 = matrixf(
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1
);
Matrix3f m2 = matrix4x4to3x3(m1);
assert(m2 == matrixf(
1, 0, 0,
0, 1, 0,
0, 0, 1)
);