| Package | Description |
|---|---|
| graph.tree.pq |
Classes representing a PQ-tree and its elements.
|
| Class and Description |
|---|
| PQNodeLabel
Possible labels of PQ-nodes
|
| PQNodeMark
A list of PQ-node marks
|
| PQNodeOrderValid
Validity of PQ-nodes (valid, invalid or needs to be reversed)
|
| PQNodeType
Types of PQ-nodes
|
| PQTree
Class represents a PQ-tree, which is used in some algorithms for planarity testing
P nodes are cut vertices
Q nodes are nonseparable components
Leaves are virtual vertices (vertices on the other side of edges where one vertex is on subgraph Gk and the
other one is in V-Vk)
|
| PQTreeEdge
Edge of the PQ-tree
|
| PQTreeNode
Node of the PQ-tree
|