def _get_edge_intersection_points(polygon1, polygon2):
intersection_points = list()
for i in range(len(polygon1)):
edge1 = Edge(polygon1[i - 1], polygon1[i])
for j in range(len(polygon2)):
edge2 = Edge(polygon2[j - 1], polygon2[j])
intersection_point = edge1.get_intersection_point(edge2)
if intersection_point is not None:
intersection_points.append(intersection_point)
return intersection_points
