void dumpmesh ( BOP_Mesh *m, bool force ) { unsigned int nonmanifold = 0; { BOP_Edges edges = m->getEdges(); int count = 0; for (BOP_IT_Edges edge = edges.begin(); edge != edges.end(); ++count, ++edge) { if (!(*edge)->getUsed() && (*edge)->getFaces().size() == 0 ) continue; BOP_Vertex * v1 = m->getVertex((*edge)->getVertex1()); BOP_Vertex * v2 = m->getVertex((*edge)->getVertex2()); if(v1->getTAG()!= BROKEN || v2->getTAG()!= BROKEN ) { int fcount = 0; BOP_Indexs faces = (*edge)->getFaces(); for (BOP_IT_Indexs face = faces.begin(); face != faces.end(); face++) { BOP_Face *f = m->getFace(*face); if(f->getTAG()== UNCLASSIFIED) ++fcount; } if(fcount !=0 && fcount !=2 ) { ++nonmanifold; } } } if (!force && nonmanifold == 0) return; } if( nonmanifold ) cout << nonmanifold << " edges detected" << endl; #ifdef BOP_DEBUG cout << "---------------------------" << endl; BOP_Edges edges = m->getEdges(); int count = 0; for (BOP_IT_Edges edge = edges.begin(); edge != edges.end(); ++count, ++edge) { BOP_Vertex * v1 = m->getVertex((*edge)->getVertex1()); BOP_Vertex * v2 = m->getVertex((*edge)->getVertex2()); if(v1->getTAG()!= BROKEN || v2->getTAG()!= BROKEN ) { int fcount = 0; BOP_Indexs faces = (*edge)->getFaces(); cout << count << ", " << (*edge) << ", " << faces.size() << endl; for (BOP_IT_Indexs face = faces.begin(); face != faces.end(); face++) { BOP_Face *f = m->getFace(*face); if(f->getTAG()== UNCLASSIFIED) ++fcount; cout << " face " << f << endl; } if(fcount !=0 && fcount !=2 ) cout << " NON-MANIFOLD" << endl; } } BOP_Faces faces = m->getFaces(); count = 0; for (BOP_IT_Faces face = faces.begin(); face != faces.end(); face++) { if( count < 12*2 || (*face)->getTAG() != BROKEN ) { cout << count << ", " << *face << endl; } ++count; } BOP_Vertexs verts = m->getVertexs(); count = 0; for (BOP_IT_Vertexs vert = verts.begin(); vert != verts.end(); vert++) { cout << count++ << ", " << *vert << " " << (*vert)->getNumEdges() << endl; BOP_Indexs edges = (*vert)->getEdges(); for( BOP_IT_Indexs it = edges.begin(); it != edges.end(); ++it) { BOP_Edge *edge = m->getEdge(*it); cout << " " << edge << endl; } } cout << "===========================" << endl; #endif }
/** * 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; }
/** * Merge a set of faces removing the vertex index v. * @param faces set of faces * @param oldFaces set of old faces obtained from the merge * @param newFaces set of new faces obtained from the merge * @param vertices sequence of indexs (v1 ... vi = v ... vn) where : * v is the current vertex to test, * vj (j < i) are tested vertices, * vk (k >= i) are vertices required to test to merge vj * (so if a vertex vk can't be merged, the merge is not possible). * @param v vertex index * @return true if the merge is succesful, false otherwise */ bool BOP_Merge::mergeFaces(BOP_Faces &faces, BOP_Faces &oldFaces, BOP_Faces &newFaces, BOP_Indexs &vertices, BOP_Index v) { bool merged = false; if (faces.size() == 2) { // Merge a pair of faces into a new face without v BOP_Face *faceI = faces[0]; BOP_Face *faceJ = faces[1]; BOP_Face *faceK = mergeFaces(faceI,faceJ,vertices,v); if (faceK != NULL) { newFaces.push_back(faceK); oldFaces.push_back(faceI); oldFaces.push_back(faceJ); merged = true; } else merged = false; } else if (faces.size() == 4) { // Merge two pair of faces into a new pair without v // First we try to perform a simplify merge to avoid more pending vertices // (for example, if we have two triangles and two quads it will be better // to do 3+4 and 3+4 than 3+3 and 4+4) BOP_Face *oldFace1 = faces[0]; BOP_Face *oldFace2, *newFace1; unsigned int indexJ = 1; while (indexJ < faces.size() && !merged) { oldFace2 = faces[indexJ]; newFace1 = mergeFaces(oldFace1,oldFace2,v); if (newFace1 != NULL) merged = true; else indexJ++; } if (merged) { // Merge the other pair of faces unsigned int indexK, indexL; if (indexJ == 1) {indexK = 2;indexL = 3;} else if (indexJ == 2) {indexK = 1;indexL = 3;} else {indexK = 1;indexL = 2;} BOP_Face *oldFace3 = faces[indexK]; BOP_Face *oldFace4 = faces[indexL]; unsigned int oldSize = vertices.size(); BOP_Face *newFace2 = mergeFaces(oldFace3,oldFace4,vertices,v); if (newFace2 != NULL) { newFaces.push_back(newFace1); newFaces.push_back(newFace2); oldFaces.push_back(oldFace1); oldFaces.push_back(oldFace2); oldFaces.push_back(oldFace3); oldFaces.push_back(oldFace4); merged = true; } else { // Undo all changes delete newFace1; merged = false; unsigned int count = vertices.size() - oldSize; if (count != 0) vertices.erase(vertices.end() - count, vertices.end()); } } if (!merged) { // Try a complete merge merged = true; while (faces.size()>0 && merged) { indexJ = 1; BOP_Face *faceI = faces[0]; merged = false; while (indexJ < faces.size()) { BOP_Face *faceJ = faces[indexJ]; BOP_Face *faceK = mergeFaces(faceI,faceJ,vertices,v); if (faceK != NULL) { // faceK = faceI + faceJ and it does not include v! faces.erase(faces.begin()+indexJ,faces.begin()+(indexJ+1)); faces.erase(faces.begin(),faces.begin()+1); newFaces.push_back(faceK); oldFaces.push_back(faceI); oldFaces.push_back(faceJ); merged = true; break; } else indexJ++; } } } } else merged = false; // there are N=1 or N=3 or N>4 faces! // Return merge result return merged; }
void clean_nonmanifold( BOP_Mesh *m ) { return; BOP_Edges nme; BOP_Edges e = m->getEdges(); for( BOP_IT_Edges it = e.begin(); it != e.end(); ++it ) { BOP_Indexs faces = (*it)->getFaces(); if( faces.size() & ~2 ) nme.push_back(*it); } if (nme.size() == 0) return; for( BOP_IT_Edges it = nme.begin(); it != nme.end(); ++it ) { if( (*it)->getFaces().size() > 1 ) { BOP_Indexs faces = (*it)->getFaces(); for( BOP_IT_Indexs face = faces.begin(); face != faces.end(); ++face ) { MT_Point3 vertex1 = m->getVertex(m->getFace(*face)->getVertex(0))->getPoint(); MT_Point3 vertex2 = m->getVertex(m->getFace(*face)->getVertex(1))->getPoint(); MT_Point3 vertex3 = m->getVertex(m->getFace(*face)->getVertex(2))->getPoint(); if (BOP_collinear(vertex1,vertex2,vertex3)) // collinear triangle deleteFace(m,m->getFace(*face)); } continue; } BOP_Face *oface1 = m->getFace((*it)->getFaces().front()); BOP_Face *oface2, *tmpface; BOP_Index first =(*it)->getVertex1(); BOP_Index next =(*it)->getVertex2(); BOP_Index last = first; unsigned short facecount = 0; bool found = false; BOP_Indexs vertList; #ifdef BOP_DEBUG cout << " first edge is " << (*it) << endl; #endif vertList.push_back(first); BOP_Edge *edge; while(true) { BOP_Vertex *vert = m->getVertex(next); BOP_Indexs edges = vert->getEdges(); edge = NULL; for( BOP_IT_Indexs eit = edges.begin(); eit != edges.end(); ++eit) { edge = m->getEdge(*eit); if( edge->getFaces().size() > 1) { edge = NULL; continue; } if( edge->getVertex1() == next && edge->getVertex2() != last ) { last = next; next = edge->getVertex2(); break; } if( edge->getVertex2() == next && edge->getVertex1() != last ) { last = next; next = edge->getVertex1(); break; } edge = NULL; } if( !edge ) break; #ifdef BOP_DEBUG cout << " next edge is " << edge << endl; #endif tmpface = m->getFace(edge->getFaces().front()); if( oface1->getOriginalFace() != tmpface->getOriginalFace() ) oface2 = tmpface; else ++facecount; vertList.push_back(last); if( vertList.size() > 3 ) break; if( next == first ) { found = true; break; } } if(found) { edge = *it; #ifdef BOP_DEBUG cout << " --> found a loop" << endl; #endif if( vertList.size() == 3 ) { BOP_Face3 *face = (BOP_Face3 *)m->getFace(edge->getFaces().front()); face->getNeighbours(first,last,next); } else if( vertList.size() == 4 ) { BOP_Face4 *face = (BOP_Face4 *)m->getFace(edge->getFaces().front()); face->getNeighbours(first,last,next,last); } else { #ifdef BOP_DEBUG cout << "loop has " << vertList.size() << "verts"; #endif continue; } if(facecount == 1) oface1 = oface2; next = vertList[1]; last = vertList[2]; if( edge->getVertex2() == next ) { BOP_Face3 *f = new BOP_Face3(next,first,last, oface1->getPlane(),oface1->getOriginalFace()); m->addFace( f ); #ifdef BOP_DEBUG cout << " face is backward: " << f << endl; #endif } else { BOP_Face3 *f = new BOP_Face3(last,first,next, oface1->getPlane(),oface1->getOriginalFace()); m->addFace( f ); #ifdef BOP_DEBUG cout << " face is forward: " << f << endl; #endif } } } }
/** * 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_Merge::mergeFaces(BOP_Indexs &mergeVertices) { // Check size > 0! if (mergeVertices.size() == 0) return false; // New faces added by merge BOP_Faces newFaces; // Old faces removed by merge BOP_Faces oldFaces; // Get the first vertex index and add it to // the current pending vertices to merge BOP_Index v = mergeVertices[0]; BOP_Indexs pendingVertices; pendingVertices.push_back(v); // Get faces with index v that come from the same original face BOP_LFaces facesByOriginalFace; getFaces(facesByOriginalFace,v); bool merged = true; // Check it has any unbroken face if (facesByOriginalFace.size()==0) { // v has not any unbroken face (so it's a new BROKEN vertex) (m_mesh->getVertex(v))->setTAG(BROKEN); merged = false; } // Merge vertex faces const BOP_IT_LFaces facesEnd = facesByOriginalFace.end(); for(BOP_IT_LFaces facesByOriginalFaceX = facesByOriginalFace.begin(); (facesByOriginalFaceX != facesEnd)&&merged; facesByOriginalFaceX++) { merged = mergeFaces((*facesByOriginalFaceX),oldFaces,newFaces,pendingVertices,v); } // Check if the are some pendingVertices to merge if (pendingVertices.size() > 1 && merged) { // There are pending vertices that we need to merge in order to merge v ... for(unsigned int i=1;i<pendingVertices.size() && merged;i++) merged = mergeFaces(oldFaces,newFaces,pendingVertices,pendingVertices[i]); } // If merge was succesful ... if (merged) { // Set old faces to BROKEN... const BOP_IT_Faces oldFacesEnd = oldFaces.end(); for(BOP_IT_Faces face=oldFaces.begin();face!=oldFacesEnd;face++) (*face)->setTAG(BROKEN); // ... and add merged faces (that are the new merged faces without pending vertices) const BOP_IT_Faces newFacesEnd = newFaces.end(); for(BOP_IT_Faces newFace=newFaces.begin();newFace!=newFacesEnd;newFace++) { m_mesh->addFace(*newFace); // Also, add new face vertices to the queue of vertices to merge if they weren't for(BOP_Index i = 0;i<(*newFace)->size();i++) { BOP_Index vertexIndex = (*newFace)->getVertex(i); if (vertexIndex >= m_firstVertex && !containsIndex(mergeVertices,vertexIndex)) mergeVertices.push_back(vertexIndex); } } // Set the merged vertices to BROKEN ... const BOP_IT_Indexs pendingEnd = pendingVertices.end(); for(BOP_IT_Indexs pendingVertex = pendingVertices.begin(); pendingVertex != pendingEnd;pendingVertex++) { BOP_Index pV = *pendingVertex; m_mesh->getVertex(pV)->setTAG(BROKEN); // ... and remove them from mergeVertices queue const BOP_IT_Indexs mergeEnd = mergeVertices.end(); for(BOP_IT_Indexs mergeVertex = mergeVertices.begin(); mergeVertex != mergeEnd;mergeVertex++) { BOP_Index mV = *mergeVertex; if (mV == pV) { mergeVertices.erase(mergeVertex); break; } } } } else { // The merge was not succesful, remove the vertex frome merge vertices queue mergeVertices.erase(mergeVertices.begin()); // free the not used newfaces const BOP_IT_Faces newFacesEnd = newFaces.end(); for(BOP_IT_Faces newFace=newFaces.begin();newFace!=newFacesEnd;newFace++) { delete (*newFace); } } // Invoke mergeFaces and return the merge result return (mergeFaces(mergeVertices) || merged); }