public void MultiplyMatrix()
{
Matrix33F m = new Matrix33F(12, 23, 45,
67, 89, 90,
43, 65, 87);
Assert.AreEqual(Matrix33F.Zero, Matrix33F.Multiply(m, Matrix33F.Zero));
Assert.AreEqual(Matrix33F.Zero, Matrix33F.Multiply(Matrix33F.Zero, m));
Assert.AreEqual(m, Matrix33F.Multiply(m, Matrix33F.Identity));
Assert.AreEqual(m, Matrix33F.Multiply(Matrix33F.Identity, m));
Assert.IsTrue(Matrix33F.AreNumericallyEqual(Matrix33F.Identity, Matrix33F.Multiply(m, m.Inverse)));
Assert.IsTrue(Matrix33F.AreNumericallyEqual(Matrix33F.Identity, Matrix33F.Multiply(m.Inverse, m)));
Matrix33F m1 = new Matrix33F(columnMajor, MatrixOrder.ColumnMajor);
Matrix33F m2 = new Matrix33F(12, 23, 45,
67, 89, 90,
43, 65, 87);
Matrix33F result = Matrix33F.Multiply(m1, m2);
for (int column = 0; column < 3; column++)
{
for (int row = 0; row < 3; row++)
{
Assert.AreEqual(Vector3F.Dot(m1.GetRow(row), m2.GetColumn(column)), result[row, column]);
}
}
}
public void Multiplication()
{
float s = 0.1234f;
Matrix33F m = new Matrix33F(columnMajor, MatrixOrder.ColumnMajor);
m = Matrix33F.Multiply(s, m);
for (int i = 0; i < 9; i++)
{
Assert.AreEqual(rowMajor[i] * s, m[i]);
}
}
public void MultiplyVector()
{
Vector3F v = new Vector3F(2.34f, 3.45f, 4.56f);
Assert.AreEqual(v, Matrix33F.Multiply(Matrix33F.Identity, v));
Assert.AreEqual(Vector3F.Zero, Matrix33F.Multiply(Matrix33F.Zero, v));
Matrix33F m = new Matrix33F(12, 23, 45,
67, 89, 90,
43, 65, 87);
Assert.IsTrue(Vector3F.AreNumericallyEqual(v, Matrix33F.Multiply(m * m.Inverse, v)));
for (int i = 0; i < 3; i++)
{
Assert.AreEqual(Vector3F.Dot(m.GetRow(i), v), Matrix33F.Multiply(m, v)[i]);
}
}
