mat3

• using function Array() { [native code] }

  • should compute determinant0ms ‣

    function det(m) {
      const m00 = m[0 * 4 + 0];
      const m01 = m[0 * 4 + 1];
      const m02 = m[0 * 4 + 2];
      const m10 = m[1 * 4 + 0];
      const m11 = m[1 * 4 + 1];
      const m12 = m[1 * 4 + 2];
      const m20 = m[2 * 4 + 0];
      const m21 = m[2 * 4 + 1];
      const m22 = m[2 * 4 + 2];
      return m00 * (m11 * m22 - m21 * m12) -
             m10 * (m01 * m22 - m21 * m02) +
             m20 * (m01 * m12 - m11 * m02);
    }
    [
      [
        2, 1, 3, 0,
        1, 2, 1, 0,
        3, 1, 2, 0,
      ],
      [
        2, 0, 0, 0,
        0, 3, 0, 0,
        0, 0, 4, 0,
      ],
    ].forEach(v => {
      const m = mat3.clone(v);
      assertEqual(mat3.determinant(m), det(m));
    });