public void Angle()
{
var p1 = new Dir2d(1, 0);
var p2 = new Dir2d(0, 1);
Assert.AreEqual(Math.PI / 2, p1.Angle(p2));
}
public void ValueType_Dir2d()
{
Assert.AreEqual(new Dir2d(1, 0), Dir2d.DX);
Assert.AreEqual(new Dir2d(0, 1), Dir2d.DY);
var p1 = new Dir2d(1, 0);
var p2 = new Dir2d(0, 1);
Assert.IsFalse(p1.IsEqual(p2, 0.1));
Assert.IsTrue(p1.IsEqual(p2, Math.PI / 2));
Assert.IsTrue(p1.IsNormal(p2, 0.1));
Assert.IsFalse(p1.IsOpposite(p2, 0.1));
Assert.IsTrue(p1.IsOpposite(p2, Math.PI / 2));
Assert.IsFalse(p1.IsParallel(p2, 0.1));
Assert.IsTrue(p1.IsParallel(p2, Math.PI / 2));
Assert.AreEqual(Math.PI / 2, p1.Angle(p2));
p2 = new Dir2d(1, 0);
Assert.AreEqual(1, p1.Crossed(new Dir2d(0, 1)));
Assert.AreEqual(Math.Sqrt(2) / 2, p1.Dot(new Dir2d(1, 1)), 0.0000001);
p2 = new Dir2d(1, 0);
p2.Reverse();
Assert.AreEqual(new Dir2d(-1, 0), p2);
Assert.AreEqual(new Dir2d(-1, 0), p1.Reversed());
p2 = new Dir2d(1, 0);
p2.Mirror(new Dir2d(0, 1));
Assert.AreEqual(new Dir2d(-1, 0), p2);
Assert.AreEqual(new Dir2d(-1, 0), p1.Mirrored(new Dir2d(0, 1)));
var m2 = new Ax2d(new Pnt2d(-1, 2), new Dir2d(-1, 0));
p2 = new Dir2d(1, 0);
p2.Mirror(m2);
Assert.AreEqual(new Dir2d(1, 0), p2);
Assert.AreEqual(new Dir2d(1, 0), p1.Mirrored(m2));
p2 = new Dir2d(1, 0);
Assert.IsTrue(new Dir2d(0, 1).IsEqual(p2.Rotated(Math.PI / 2), 0.00001));
p2.Rotate(Math.PI / 2);
Assert.IsTrue(new Dir2d(0, 1).IsEqual(p2, 0.0001));
//TestContext.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0},{1},{2}", gp2.x, gp2.y, gp2.z));
Trsf2d t1 = new Trsf2d();
t1.SetRotation(new Pnt2d(1, 2), Math.PI / 2);
p2 = new Dir2d(0, 1);
Assert.IsTrue(new Dir2d(-1, 0).IsEqual(p2.Transformed(t1), 0.0001));
p2.Transform(t1);
Assert.IsTrue(new Dir2d(-1, 0).IsEqual(p2, 0.0001));
}
