public void TestDeterminant()
{
var m = Matrix3D.GetIdentity();
Assert.AreEqual(1, m.GetDeterminant());
m.SetRow(0, 1, 0, 0);
m.SetRow(1, 0, 1, 0);
m.SetRow(2, 0, 5, 0);
Assert.AreEqual(0, m.GetDeterminant());
m = new Matrix3D(new float[, ]
{
{ 1, 2, 3 },
{ 4, 5, 6 },
{ 7, 8, 9 }
});
Assert.AreEqual(1 * 5 * 9 + 2 * 6 * 7 + 3 * 4 * 8 - 7 * 5 * 3 - 8 * 6 * 1 - 9 * 2 * 4, m.GetDeterminant());
}
public void TestDeterminant()
{
var m = Matrix3D.GetIdentity();
Assert.AreEqual(1, m.GetDeterminant());
m.SetRow(0, 1, 0, 0);
m.SetRow(1, 0, 1, 0);
m.SetRow(2, 0, 5, 0);
Assert.AreEqual(0, m.GetDeterminant());
m = new Matrix3D(new float[,]
{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9}
});
Assert.AreEqual(1*5*9 + 2*6*7 + 3*4*8 - 7*5*3 - 8*6*1 - 9*2*4, m.GetDeterminant());
}