/**
* create new clone of the given edge between adjacent vertices
*
* @param Edge $originalEdge original edge from old graph
* @param int $ia index of start vertex
* @param int $ib index of end vertex
* @return Edge new edge in this graph
* @uses Edge::getVertices()
* @uses Graph::getVertex()
* @uses Vertex::createEdge() to create a new undirected edge if given edge was undrected
* @uses Vertex::createEdgeTo() to create a new directed edge if given edge was directed
* @uses Edge::getWeight()
* @uses Edge::setWeight()
* @uses Edge::getFlow()
* @uses Edge::setFlow()
* @uses Edge::getCapacity()
* @uses Edge::setCapacity()
*/
private function createEdgeCloneInternal(Edge $originalEdge, $ia, $ib)
{
$ends = $originalEdge->getVertices()->getIds();
// get start vertex from old start vertex id
$a = $this->getVertex($ends[$ia]);
// get target vertex from old target vertex id
$b = $this->getVertex($ends[$ib]);
if ($originalEdge instanceof EdgeDirected) {
$newEdge = $a->createEdgeTo($b);
} else {
// create new edge between new a and b
$newEdge = $a->createEdge($b);
}
// TODO: copy edge attributes
$newEdge->getAttributeBag()->setAttributes($originalEdge->getAttributeBag()->getAttributes());
$newEdge->setWeight($originalEdge->getWeight());
$newEdge->setFlow($originalEdge->getFlow());
$newEdge->setCapacity($originalEdge->getCapacity());
return $newEdge;
}
