def merge_node_set_into_node(self, original: Node, attached: Set[Node]):
# border attribute should be true if any are borders
original.is_border = any([i.is_border for i in attached])
# all nodes in attached should be removed from grid
for i in attached:
if i.position != original.position:
i.deleted = True
# position should cover all attached
original.position = set.union(*[i.position for i in attached])
# final outflow is the outflow for all nodes except outflows to itself
all_possible_outflows = []
for i in attached:
for j in i.outflow:
if not overlaps(j.position, original.position):
if not any([overlaps(j.position, k.position) for k in all_possible_outflows]):
all_possible_outflows.append(j)
original.outflow = all_possible_outflows
def set_border(self, i: int, j: int, node: Node):
node.is_border = i == 0 or j == 0 or i == len(
self.node_grid) - 1 or j == len(self.node_grid[0]) - 1