def apply(self, edge: Edge) -> bool:
if try_set_relation(
edge,
FixedEdgeLengthVertexRelation(edge.v1, edge.v2, self.length)):
edge.constraint = EdgeConstraint.FIXED_LENGTH
return True
return False
def apply(self, edge: Edge) -> bool:
if [
rel for rel in edge.v1.relations
if rel.constraint == EdgeConstraint.HORIZONTAL
]:
return False
if [
rel for rel in edge.v2.relations
if rel.constraint == EdgeConstraint.HORIZONTAL
]:
return False
if try_set_relation(edge,
HorizontalEdgeVertexRelation(edge.v1, edge.v2)):
edge.constraint = EdgeConstraint.HORIZONTAL
return True
return False
def apply(self, edge: Edge) -> bool:
if not edge.constraint:
return True
matching_relations = [
rel for rel in edge.v1.relations
if rel.constraint == edge.constraint
]
removed = [
rel for rel in edge.v2.relations if rel in matching_relations
]
if len(removed) != 1:
return False
edge.v1.relations.remove(removed[0])
edge.v2.relations.remove(removed[0])
edge.constraint = None
return True