@Test
    public void testDeterminant() {
        assertEquals(20.0f, FastMath.determinant(
                5.0,  -7.0,  2.0,  2.0,
                0.0,   3.0,  0.0, -4.0,
               -5.0,  -8.0,  0.0,  3.0,
                0.0,   5.0,  0.0, -6.0), 0.0f);

        assertEquals(0.0f, FastMath.determinant(
                1.0,  2.0,  3.0,  4.0,
                5.0,  6.0,  7.0,  8.0,
                9.0,  10.0, 11.0, 12.0,
                13.0, 14.0, 15.0, 16.0), 0.0f);
    }
Verifies that algorithms in {@link FastMath} are working correctly.

@author Kirill Vainer
jme3-core/src/test/java/com/jme3/math/FastMathTest.java