def test_new_route(self):
line = LineString((0, 0), (0, 50), (50, 50), (50, 0), srid=32616)
line_4326 = LineString((0, 0), (0, 50), (50, 50), (50, 0), srid=4326)
route = TestRoutes(name='Route No {}'.format(random.randint(1, 100000)),
start=self.start_cell_id,
end=self.end_cell_id,
distance=0, geom=line,
geom_4326=line_4326)
route.save()
self.assertEqual(0, TestRoutes.objects.get(start=self.start_cell_id).distance)
def create_route(self, start_pt, target_pt):
"""
Based on points passed through a HTTP request a route is calculated, geometry generated on the basis of it
and persisted to the database.
:param start_pt: the start point specified
:param target_pt: the end point specified
:return: the id of the generated and persisted route geometry back to the page which requested it
"""
start_end = grid_utils.GridUtilities.start_end_points_to_cells(start_pt, target_pt)
start_node = start_end[0]
end_node = start_end[1]
reverse_path = self.path_finder.find_path(start_node, end_node, self.gra.graph_dict)
path = self.path_finder.rebuild_path(reverse_path[0], start_node, end_node)
route_geoms = _generate_route_geom(path)
start_pt_record = GridUtilities.find_cell_centre_projected(start_node, self.qs)
end_pt_record = GridUtilities.find_cell_centre_projected(end_node, self.qs)
route = TestRoutes(name='Route No {}'.format(random.randint(1, 100000)),
distance=round(route_geoms[0].length/1852, 2),
geom=route_geoms[0],
geom_4326=route_geoms[1],
start_geom=start_pt_record,
end_geom=end_pt_record)
route.save()
return route.gid
def bfs_route(start, target):
"""
Included for completeness but not available through the GUI
:param start:
:param target:
:return:
"""
bfs_finder = BFSPathFinder()
g = pickle.load(open('outfile.txt', 'rb'))
gra = graph.Graph(g)
print("Graph generated...")
BFSPathFinder.find_path_bfs(gra.graph_dict, start)
route_cell_gids = BFSPathFinder.find_path_bfs(start, target, bfs_finder.parents[::-1])
print(route_cell_gids)
waypoints = []
for item in route_cell_gids:
cell = PathGrid.objects.get(pk=item)
centre_point = cell.geom.centroid
waypoints.append(centre_point)
route_line = LineString(waypoints)
route = TestRoutes(name='Test route No' + str(random.random), start=start, end=target,
distance=route_line.length, geom=route_line)
route.save()
return route.gid
