public void CreateRotation2()
{
double angle = (double)MathHelper.ToRadians(30);
Matrix22D m = Matrix22D.CreateRotation(angle);
Assert.IsTrue(Vector2D.AreNumericallyEqual(new Vector2D((double)Math.Cos(angle), (double)Math.Sin(angle)), m * Vector2D.UnitX));
}
public void CreateRotation()
{
Matrix22D m = Matrix22D.CreateRotation(0.0);
Assert.AreEqual(Matrix22D.Identity, m);
m = Matrix22D.CreateRotation((double)Math.PI / 2);
Assert.IsTrue(Vector2D.AreNumericallyEqual(Vector2D.UnitY, m * Vector2D.UnitX));
}