face SimpleEmbedder::findBestExternalFace(
const PlanRep& PG,
const CombinatorialEmbedding& E)
{
FaceArray<int> weight(E);
for(face f : E.faces)
weight[f] = f->size();
for(node v : PG.nodes)
{
if(PG.typeOf(v) != Graph::generalizationMerger)
continue;
adjEntry adjFound = nullptr;
for(adjEntry adj : v->adjEdges) {
if (adj->theEdge()->source() == v) {
adjFound = adj;
break;
}
}
OGDF_ASSERT(adjFound->theEdge()->source() == v);
node w = adjFound->theEdge()->target();
bool isBase = true;
for(adjEntry adj : w->adjEdges) {
edge e = adj->theEdge();
if(e->target() != w && PG.typeOf(e) == Graph::generalization) {
isBase = false;
break;
}
}
if(isBase == false)
continue;
face f1 = E.leftFace(adjFound);
face f2 = E.rightFace(adjFound);
weight[f1] += v->indeg();
if(f2 != f1)
weight[f2] += v->indeg();
}
face fBest = E.firstFace();
for(face f : E.faces)
if(weight[f] > weight[fBest])
fBest = f;
return fBest;
}
void CPlanarEdgeInserter::constructDualGraph(ClusterPlanRep& CPR,
CombinatorialEmbedding& E,
EdgeArray<edge>& arcRightToLeft,
EdgeArray<edge>& arcLeftToRight,
FaceArray<node>& nodeOfFace,
//NodeArray<face>&, faceOfNode,
EdgeArray<edge>& arcTwin)
{
//dual graph gets two arcs for each edge (in both directions)
//these arcs get their status (usable for path) depending on
//the edge to be reinserted
m_dualGraph.clear();
//faceOfNode.init(m_dualGraph, 0);
//*********************************
//construct nodes
//corresponding to the graphs faces
face f;
for (f = E.firstFace(); f; f = f->succ())
{
node v = m_dualGraph.newNode();
nodeOfFace[f] = v;
//faceOfNode[v] = f;
}
//*********************************
//
edge e;
forall_edges(e, CPR)
{
edge arc1 = m_dualGraph.newEdge( nodeOfFace[E.rightFace(e->adjTarget())],
nodeOfFace[E.rightFace(e->adjSource())] );
arcLeftToRight[e] = arc1;
edge arc2 = m_dualGraph.newEdge( nodeOfFace[E.rightFace(e->adjSource())],
nodeOfFace[E.rightFace(e->adjTarget())] );
arcRightToLeft[e] = arc2;
arcTwin[arc1] = arc2;
arcTwin[arc2] = arc1;
m_arcOrig[arc1] = e->adjSource();//e->adjTarget();
m_arcOrig[arc2] = e->adjTarget();//e->adjSource();
}