/**
* Get the result of transforming the plane by a Matrix.
*
* @param M The matrix to transform plane with.
* @return The result of transform.
*/
public FPlane TransformBy(FMatrix M)
{
FMatrix tmpTA = M.TransposeAdjoint();
float DetM = M.Determinant();
return(this.TransformByUsingAdjointT(M, DetM, tmpTA));
}
/// <summary>
/// Get the result of transforming the plane by a Matrix.
/// </summary>
/// <param name="m">The matrix to transform plane with.</param>
/// <returns>The result of transform.</returns>
public FPlane TransformBy(FMatrix m)
{
FMatrix tmpTA = m.TransposeAdjoint();
float detM = m.Determinant();
return(TransformByUsingAdjointT(m, detM, tmpTA));
}
public void TestDeterminant()
{
// 10
FMatrix <int> testOneMat = new FMatrix <int>(1, 1, 10);
int? oneDet = FMatrix <int> .Determinant(testOneMat);
Assert.IsTrue(oneDet.HasValue);
Assert.AreEqual(oneDet.Value, 10);
// 1 2
// 3 4
FMatrix <int> mat = new FMatrix <int>(2, 2, -1);
int number = 1;
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 2; j++)
{
mat.matrix[i][j] = number;
number++;
}
}
Assert.IsTrue(mat.matrix[0][0] == 1);
Assert.IsTrue(mat.matrix[0][1] == 2);
Assert.IsTrue(mat.matrix[1][0] == 3);
Assert.IsTrue(mat.matrix[1][1] == 4);
int?det = FMatrix <int> .Determinant(mat);
Assert.IsTrue(det.HasValue);
Assert.AreEqual(det.Value, -2);
// -1 -2
// -3 -4
FMatrix <int> mat3 = new FMatrix <int>(2, 2, -1);
number = 1;
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 2; j++)
{
mat3.matrix[i][j] = number;
number++;
}
}
int?det3 = FMatrix <int> .Determinant(mat3);
Assert.IsTrue(det3.HasValue);
Assert.AreEqual(det3.Value, -2);
// 1 2 5
// 3 4 6
// 9 8 7
FMatrix <int> mat2 = new FMatrix <int>(3, 3, 0);
mat2[0][0] = 1;
mat2[0][1] = 2;
mat2[0][2] = 5;
mat2[1][0] = 3;
mat2[1][1] = 4;
mat2[1][2] = 6;
mat2[2][0] = 9;
mat2[2][1] = 8;
mat2[2][2] = 7;
int?det2 = FMatrix <int> .Determinant(mat2);
Assert.IsTrue(det2.HasValue);
Assert.AreEqual(det2.Value, -14);
}