def test_ray_polyline_intersections(self):
# /.\
# .
# .
# (4)---------+----(3)
# /________:_____:_________
# \ . |
# (1)--+----(2)
# | .
# | .
# (0) .
polygon = [(0.0, 0.0), (0.0, 1.0), (1.0, 1.0), (1.0, 2.0), (-1.0, 2.0)]
p0 = (0.5, 0.0)
ray0 = (0.0, 1.0)
intersections0 = GeometryTools.rayPolygonIntersections(p0, ray0, polygon)
self.assertEqual(intersections0, [(1, (0.5, 1.0)), (3, (0.5, 2.0))])
p1 = (1.5, 1.5)
ray1 = (-1.0, 0.0)
intersections1 = GeometryTools.rayPolygonIntersections(p1, ray1, polygon)
self.assertEqual(intersections1, [(2, (1, 1.5))])
def test_point_in_polygon_with_3_element_points(self):
p1 = (0.5, 0.51, 0.2)
p2 = (0.5, 0.49, 0.1)
poly = [(0,0,9), (0,1,9), (0.6,0.5), (0.4,0.5,9), (1,1), (1,0,9)]
self.assertFalse(GeometryTools.pointInPolygon(p1, poly))
self.assertTrue(GeometryTools.pointInPolygon(p2, poly))
def test_point_in_strange_polygon(self):
p1 = (0.5, 0.51)
p2 = (0.5, 0.49)
poly = [(0,0), (0, 1), (0.6, 0.5), (0.4, 0.5), (1, 1), (1, 0)]
self.assertFalse(GeometryTools.pointInPolygon(p1, poly))
self.assertTrue(GeometryTools.pointInPolygon(p2, poly))
def test_convex_hull(self):
points = [(0, 0), (0, 1), (1, 1), (1, 0), (1, 1), (0.5, 0.5), (0.25, 0.25), (0.5, 1.25), (0.5, 0.75)]
result = GeometryTools.convexHull(points)
self.assertEqual(result, [(0, 0), (0, 1), (0.5, 1.25), (1, 1), (1, 0)])
points = [(0, -0.5), (0, 0.5), (-0.5, 0), (0.5, 0), (0, 0), (0.5, 0.5)]
result = GeometryTools.convexHull(points)
self.assertEqual(result, [(-0.5, 0), (0, 0.5), (0.5, 0.5), (0.5, 0), (0, -0.5)])
def test_ccw(self):
p1 = (0, 0)
p2 = (1, 0)
p3 = (0, 1)
p4 = (0, 2)
self.assertTrue(GeometryTools.ccw(p1, p2, p3) > 0) # Counter-clockwise
self.assertTrue(GeometryTools.ccw(p1, p3, p2) < 0) # Clockwise
self.assertTrue(GeometryTools.ccw(p1, p3, p4) == 0) # Colinear
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_point_in_polygon(self):
p1 = (0.5, 0.5)
p2 = (2, 2)
p3 = (1, 0.5) # on the edge
poly1 = [(0, 0), (1, 0), (1, 1), (0, 1)] # Not explicitly closed
poly2 = [(0, 0), (1, 0), (1, 1), (0, 1), (0, 0)] # explicitly closed
self.assertTrue(GeometryTools.pointInPolygon(p1, poly1))
self.assertTrue(GeometryTools.pointInPolygon(p1, poly2))
self.assertFalse(GeometryTools.pointInPolygon(p2, poly1))
self.assertFalse(GeometryTools.pointInPolygon(p2, poly2))
self.assertTrue(GeometryTools.pointInPolygon(p3, poly1))
def test_point_in_polyline(self):
p1 = (0.5, 0.5)
p2 = (2, 2)
poly = Polyline()
poly.addPoint(0, 0)
poly.addPoint(1, 0)
poly.addPoint(1, 1)
poly.addPoint(0, 1)
poly.addPoint(0, 0)
self.assertTrue(GeometryTools.pointInPolygon(p1, poly))
self.assertTrue(GeometryTools.pointInPolygon(p1, poly))
self.assertFalse(GeometryTools.pointInPolygon(p2, poly))
self.assertFalse(GeometryTools.pointInPolygon(p2, poly))
def test_slicing_internal_hull(self):
polygon = [(2,2),(2,1),(1,1),(1,5),(5,5),(5,4),(4,4)]
edge = [(0,0) , (10,0) , (10,10), (0,10) , (0,0)]
sliced = GeometryTools.slicePolygon(edge , polygon)
expected = [(2,2),(2,1),(1,1),(1,5),(5,5),(5,4),(4,4),(2.0,4.0),(2,2)]
self.assertEqual(sliced, expected)
def test_ray_polyline_intersections(self):
p0 = (0.5, 0.0)
ray = (0.0, 1.0)
polygon = [(0.0, 0.0), (0.0, 1.0), (1.0, 1.0), (1.0, 2.0), (-1.0, 2.0)]
intersections = GeometryTools.rayPolygonIntersections(p0, ray, polygon)
self.assertEqual(intersections, [(1, (0.5, 1.0)), (3, (0.5, 2.0))])
def test_ray_polyline_intersections(self):
p0 = (0.5, 0.0)
ray = (0.0, 1.0)
polygon = [(0.0, 0.0), (0.0, 1.0), (1.0, 1.0), (1.0, 2.0), (-1.0, 2.0)]
intersections = GeometryTools.rayPolygonIntersections(p0, ray, polygon)
self.assertEqual(intersections, [(1, (0.5, 1.0)), (3, (0.5, 2.0))])
def test_slicing_bendy_line_segments(self):
p0 = (0.0, 0.0)
p1 = (0.0, 1.0)
p2 = (1.0, 1.0)
p3 = (1.0, 0.0)
polygon = [p0, p1, p2, p3, p0]
lp0 = (0.2, 0.5)
lp1 = (0.4, 0.5)
lp2 = (0.4, 0.3)
line = [lp0, lp1, lp2]
expected = [(0.0, 0.5), p1, p2, p3, (0.4, 0.0), lp2, lp1, lp0, (0.0, 0.5)]
result = GeometryTools.slicePolygon(polygon, line)
self.assertEqual(result, expected)
line = [lp2, lp1, lp0]
result = GeometryTools.slicePolygon(polygon, line)
self.assertEqual(result, expected)
def test_slicing_same_segment(self):
p0 = (0.0, 0.0)
p1 = (0.0, 1.0)
p2 = (1.0, 1.0)
p3 = (1.0, 0.0)
polygon = [p0, p1, p2, p3, p0]
lp0 = (0.2, 0.5)
lp1 = (0.4, 0.5)
lp2 = (0.4, 0.3)
lp3 = (0.2, 0.3)
line = [lp0, lp1, lp2, lp3]
result = GeometryTools.slicePolygon(polygon, line)
expected = [(0.0, 0.5), (0.0, 0.3), lp3, lp2, lp1, lp0, (0.0, 0.5)]
self.assertEqual(result, expected)
line = [lp3, lp2, lp1, lp0]
result = GeometryTools.slicePolygon(polygon, line)
expected = [(0.0, 0.3), (0.0, 0.5), lp0, lp1, lp2, lp3, (0.0, 0.3)]
self.assertEqual(result, expected)
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))
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))
