public void ToMatrixD()
{
Matrix44D m44 = new Matrix44D(1, 2, 3, 4,
5, 6, 7, 8,
9, 10, 11, 12,
13, 14, 15, 16);
MatrixD m = m44.ToMatrixD();
for (int i = 0; i < 4; i++)
for (int j = 0; j < 4; j++)
Assert.AreEqual(i * 4 + j + 1, m[i, j]);
m = m44;
for (int i = 0; i < 4; i++)
for (int j = 0; j < 4; j++)
Assert.AreEqual(i * 4 + j + 1, m[i, j]);
}