public void NormalLengthIsOneForNoYDistance() { Point p1 = new Point(1.234, -3.456); Point p2 = new Point(34, -3.456); var lw = new LineWidener(p1, p2); Point normal = lw.FindNormal(); Assert.AreEqual(1.0, Math.Round(normal.Length(), 6)); }
public void NormalScalarProductIsZero() { Point p1 = new Point(1.234, -3.456); Point p2 = new Point(34, 456); var lw = new LineWidener(p1, p2); Point normal = lw.FindNormal(); double scalarProduct = normal.X * (p1.X - p2.X) + normal.Y * (p1.Y - p2.Y); Assert.AreEqual(0.0, Math.Round(scalarProduct, 6)); }