public void PlaneReflectInPlaneTest()
{
Coord3d coord1 = new Coord3d(new Point3d(2, 3, 1), Matrix3d.RotationMatrix(new Vector3d(2, 1, 5), PI / 3));
Coord3d coord2 = new Coord3d(new Point3d(1, -3, 4), Matrix3d.RotationMatrix(new Vector3d(3, 2, 1), PI / 2));
Plane3d s1 = new Plane3d(1, 2, -2, -3, coord1);
Plane3d s2 = new Plane3d(2, -1, 3, -1, coord2);
Plane3d s3 = s1.ReflectIn(s2);
s3.Point = s3.Point.ConvertTo(coord2);
Plane3d s4 = s3.ReflectIn(s2);
bool bol = s4.Equals(s1);
Assert.IsTrue(s4 == s1);
}