/**
* Simplifies a mesh, merging the faces with the specified vertices.
* @param mergeVertices vertices to test
* @return true if a face merge was performed
*/
bool BOP_Merge2::mergeFaces(BOP_Indexs &mergeVertices)
{
// Check size > 0!
if (mergeVertices.size() == 0) return false;
bool didMerge = false;
for( BOP_Index i = 0; i < mergeVertices.size(); ++i ) {
BOP_LFaces facesByOriginalFace;
BOP_Index v = mergeVertices[i];
BOP_Vertex *vert = m_mesh->getVertex(v);
#ifdef BOP_DEBUG
cout << "i = " << i << ", v = " << v << ", vert = " << vert << endl;
if (v==48)
cout << "found vert 48" << endl;
#endif
if ( vert->getTAG() != BROKEN ) {
getFaces(facesByOriginalFace,v);
switch (facesByOriginalFace.size()) {
case 0:
// v has no unbroken faces (so it's a new BROKEN vertex)
freeVerts( v, vert );
vert->setTAG(BROKEN);
break;
case 2: {
#ifdef BOP_DEBUG
cout << "size of fBOF = " << facesByOriginalFace.size() << endl;
#endif
BOP_Faces ff = facesByOriginalFace.front();
BOP_Faces fb = facesByOriginalFace.back();
BOP_Index eindexs[2];
int ecount = 0;
// look for two edges adjacent to v which contain both ofaces
BOP_Indexs edges = vert->getEdges();
#ifdef BOP_DEBUG
cout << " ff has " << ff.size() << " faces" << endl;
cout << " fb has " << fb.size() << " faces" << endl;
cout << " v has " << edges.size() << " edges" << endl;
#endif
for(BOP_IT_Indexs it = edges.begin(); it != edges.end();
++it ) {
BOP_Edge *edge = m_mesh->getEdge(*it);
BOP_Indexs faces = edge->getFaces();
#ifdef BOP_DEBUG
cout << " " << edge << " has " << edge->getFaces().size() << " faces" << endl;
#endif
if( faces.size() == 2 ) {
BOP_Face *f0 = m_mesh->getFace(faces[0]);
BOP_Face *f1 = m_mesh->getFace(faces[1]);
if( f0->getOriginalFace() != f1->getOriginalFace() ) {
#ifdef BOP_DEBUG
cout << " " << f0 << endl;
cout << " " << f1 << endl;
#endif
eindexs[ecount++] = (*it);
}
}
}
if(ecount == 2) {
#ifdef BOP_DEBUG
cout << " edge indexes are " << eindexs[0];
cout << " and " << eindexs[1] << endl;
#endif
BOP_Edge *edge = m_mesh->getEdge(eindexs[0]);
BOP_Index N = edge->getVertex1();
if(N == v) N = edge->getVertex2();
#ifdef BOP_DEBUG
cout << " ## OK, replace "<<v<<" with "<<N << endl;
#endif
mergeVertex(ff , v, N );
mergeVertex(fb , v, N );
// now remove v and its edges
vert->setTAG(BROKEN);
for(BOP_IT_Indexs it = edges.begin(); it != edges.end();
++it ) {
BOP_Edge *tedge = m_mesh->getEdge(*it);
tedge->setUsed(false);
}
didMerge = true;
}
#ifdef BOP_DEBUG
else {
cout << " HUH: ecount was " << ecount << endl;
}
#endif
}
break;
default:
break;
}
}
}
return didMerge;
}
