def test_line_to_ray(self):
p0 = (0.0, 0.0)
p1 = (1.0, 1.0)
p2 = (1.0, 0.0)
ray = GeometryTools.lineToRay(p0, p1)
self.assertEqual(ray, (1.0 / sqrt(2.0), 1.0 / sqrt(2.0)))
ray = GeometryTools.lineToRay(p1, p0)
self.assertEqual(ray, (-1.0 / sqrt(2.0), -1.0 / sqrt(2.0)))
ray = GeometryTools.lineToRay(p0, p2)
self.assertEqual(ray, (1.0, 0.0))
def test_ray_line_intersection(self):
p0 = (0.0, 0.0)
p1 = (0.0, 1.0)
p2 = (1.0, 1.0)
p3 = (1.0, 0.0)
p5 = (2.0, 1.0)
ray1 = GeometryTools.lineToRay(p0, p2)
ray2 = GeometryTools.lineToRay(p2, p0)
ray3 = GeometryTools.lineToRay(p0, p5)
self.assertEqual((0.5, 0.5),
GeometryTools.rayLineIntersection(p0, ray1, p1, p3))
self.assertIsNone(GeometryTools.rayLineIntersection(
p0, ray2, p1,
p3)) #ray2 is ray1 reversed (no backwards intersections)
self.assertEqual((1.0, 0.5),
GeometryTools.rayLineIntersection(p0, ray3, p2, p3))
self.assertIsNone(GeometryTools.rayLineIntersection(p0, ray3, p1, p2))