iTextSharp.text.pdf.parser.Matrix.GetDeterminant C# (CSharp) Метод

        public float GetDeterminant()
        {
            // ref http://en.wikipedia.org/wiki/Determinant
            // note that in PDF, I13 and I23 are always 0 and I33 is always 1
            // so this could be simplified/faster
            return    vals[I11] * vals[I22] * vals[I33]
                    + vals[I12] * vals[I23] * vals[I31]
                    + vals[I13] * vals[I21] * vals[I32]
                    - vals[I11] * vals[I23] * vals[I32]
                    - vals[I12] * vals[I21] * vals[I33]
                    - vals[I13] * vals[I22] * vals[I31];
        }

 virtual public void TestDeterminant()
 {
     Matrix m = new Matrix(2, 3, 4, 5, 6, 7);
     Assert.AreEqual(-2f, m.GetDeterminant(), .001f);
 }