public static float determinant(double m00, double m01, double m02,
            double m03, double m10, double m11, double m12, double m13,
            double m20, double m21, double m22, double m23, double m30,
            double m31, double m32, double m33) {

        double det01 = m20 * m31 - m21 * m30;
        double det02 = m20 * m32 - m22 * m30;
        double det03 = m20 * m33 - m23 * m30;
        double det12 = m21 * m32 - m22 * m31;
        double det13 = m21 * m33 - m23 * m31;
        double det23 = m22 * m33 - m23 * m32;
        return (float) (m00 * (m11 * det23 - m12 * det13 + m13 * det12) - m01
                * (m10 * det23 - m12 * det03 + m13 * det02) + m02
                * (m10 * det13 - m11 * det03 + m13 * det01) - m03
                * (m10 * det12 - m11 * det02 + m12 * det01));
    }
Returns the determinant of a 4x4 matrix.

@param m00 the element in row 0, column 0 of the matrix
@param m01 the element in row 0, column 1 of the matrix
@param m02 the element in row 0, column 2 of the matrix
@param m03 the element in row 0, column 3 of the matrix
@param m10 the element in row 1, column 0 of the matrix
@param m11 the element in row 1, column 1 of the matrix
@param m12 the element in row 1, column 2 of the matrix
@param m13 the element in row 1, column 3 of the matrix
@param m20 the element in row 2, column 0 of the matrix
@param m21 the element in row 2, column 1 of the matrix
@param m22 the element in row 2, column 2 of the matrix
@param m23 the element in row 2, column 3 of the matrix
@param m30 the element in row 3, column 0 of the matrix
@param m31 the element in row 3, column 1 of the matrix
@param m32 the element in row 3, column 2 of the matrix
@param m33 the element in row 3, column 3 of the matrix
@return the determinant
jme3-core/src/main/java/com/jme3/math/FastMath.java