BOP_Merge.cpp

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/*
 *
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): Marc Freixas, Ken Hughes
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "BOP_Merge.h"

#ifdef BOP_ORIG_MERGE

#ifdef _MSC_VER
#if _MSC_VER < 1300
#include <list>
#endif
#endif

BOP_Merge BOP_Merge::SINGLETON;

void BOP_Merge::mergeFaces(BOP_Mesh *m, BOP_Index v)
{
    m_mesh = m;
    m_firstVertex = v;

    bool cont = false;

    // Merge faces
    mergeFaces();

    do {
        // Add quads ...
        cont = createQuads();
        if (cont) {
            // ... and merge new faces
            cont = mergeFaces();
        }
        // ... until the merge is not succesful
    } while(cont);
}

bool BOP_Merge::mergeFaces()
{
    BOP_Indexs mergeVertices;
    BOP_Vertexs vertices = m_mesh->getVertexs();
    BOP_IT_Vertexs v = vertices.begin();
    const BOP_IT_Vertexs verticesEnd = vertices.end();

    // Advance to first mergeable vertex
    advance(v,m_firstVertex);
    BOP_Index pos = m_firstVertex;

    // Add unbroken vertices to the list
    while(v!=verticesEnd) {
        if ((*v)->getTAG() != BROKEN) mergeVertices.push_back(pos);
        v++;pos++;
    }

    // Merge faces with that vertices
    return mergeFaces(mergeVertices);
}


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);
}


bool BOP_Merge::mergeFaces(BOP_Faces &oldFaces, BOP_Faces &newFaces, BOP_Indexs &vertices, BOP_Index v) {

    bool merged = true;

    // Get faces with v that come from the same original face, (without the already 'merged' from vertices)
    BOP_LFaces facesByOriginalFace;
    getFaces(facesByOriginalFace,vertices,v);
  
    if (facesByOriginalFace.size()==0) {
        // All the faces with this vertex were already merged!!!
        return true;
    }
    else {
        // Merge faces
      const BOP_IT_LFaces facesEnd = facesByOriginalFace.end();
        for(BOP_IT_LFaces facesByOriginalFaceX = facesByOriginalFace.begin();
            (facesByOriginalFaceX != facesEnd)&&merged;
            facesByOriginalFaceX++) {
                merged = mergeFaces((*facesByOriginalFaceX),oldFaces,newFaces,vertices,v);
        }
    }
    return merged;
}


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;
}

BOP_Face* BOP_Merge::mergeFaces(BOP_Face *faceI, BOP_Face *faceJ, BOP_Index v)
{
    if (faceI->size() == 3) {
        if (faceJ->size() == 4)
            return mergeFaces((BOP_Face4*)faceJ,(BOP_Face3*)faceI,v);
    }
    else if (faceI->size() == 4) {
        if (faceJ->size() == 3)
            return mergeFaces((BOP_Face4*)faceI,(BOP_Face3*)faceJ,v);
    }
    return NULL;
}

BOP_Face* BOP_Merge::mergeFaces(BOP_Face *faceI, BOP_Face *faceJ, BOP_Indexs &pending, BOP_Index v)
{
    if (faceI->size() == 3) {
        if (faceJ->size() == 3)
            return mergeFaces((BOP_Face3*)faceI,(BOP_Face3*)faceJ,v);
        else if (faceJ->size() == 4)
            return mergeFaces((BOP_Face4*)faceJ,(BOP_Face3*)faceI,pending,v);
    }
    else if (faceI->size() == 4) {
        if (faceJ->size() == 3)
            return mergeFaces((BOP_Face4*)faceI,(BOP_Face3*)faceJ,pending,v);
        else if (faceJ->size() == 4)
            return mergeFaces((BOP_Face4*)faceI,(BOP_Face4*)faceJ,pending,v);
    }
    return NULL;
}

BOP_Face* BOP_Merge::mergeFaces(BOP_Face3 *faceI, BOP_Face3 *faceJ, BOP_Index v)
{
    BOP_Face *faceK = NULL;

    // Get faces data
    BOP_Index prevI, nextI, prevJ, nextJ;   
    faceI->getNeighbours(v,prevI,nextI);
    faceJ->getNeighbours(v,prevJ,nextJ);
    MT_Point3 vertex = m_mesh->getVertex(v)->getPoint();
    MT_Point3 vPrevI = m_mesh->getVertex(prevI)->getPoint();
    MT_Point3 vNextI = m_mesh->getVertex(nextI)->getPoint();
    MT_Point3 vPrevJ = m_mesh->getVertex(prevJ)->getPoint();
    MT_Point3 vNextJ = m_mesh->getVertex(nextJ)->getPoint();

    // Merge test
    if (prevI == nextJ) {
        // Both faces share the edge (prevI,v) == (v,nextJ)
        if (BOP_between(vertex,vNextI,vPrevJ)) {
            faceK = new BOP_Face3(prevI,prevJ,nextI,faceI->getPlane(),faceI->getOriginalFace());
            faceK->setTAG(faceI->getTAG());
        }
    }
    else if (nextI == prevJ) {
        // Both faces share the edge (v,nextI) == (prevJ,v)
        if (BOP_between(vertex,vPrevI,vNextJ)) {
            faceK = new BOP_Face3(prevI,nextJ,nextI,faceI->getPlane(),faceI->getOriginalFace());
            faceK->setTAG(faceI->getTAG());
        }
    }
    return faceK;
}

BOP_Face* BOP_Merge::mergeFaces(BOP_Face4 *faceI, BOP_Face3 *faceJ, BOP_Index v)
{
    BOP_Face *faceK = NULL;

    // Get faces data
    BOP_Index prevI, nextI, opp, prevJ, nextJ;
    faceI->getNeighbours(v,prevI,nextI,opp);
    faceJ->getNeighbours(v,prevJ,nextJ);
    MT_Point3 vertex = m_mesh->getVertex(v)->getPoint();
    MT_Point3 vOpp = m_mesh->getVertex(opp)->getPoint();
    MT_Point3 vPrevI = m_mesh->getVertex(prevI)->getPoint();
    MT_Point3 vNextI = m_mesh->getVertex(nextI)->getPoint();
    MT_Point3 vPrevJ = m_mesh->getVertex(prevJ)->getPoint();
    MT_Point3 vNextJ = m_mesh->getVertex(nextJ)->getPoint();

    // Merge test
    if (prevI == nextJ) {
        if (BOP_between(vertex,vNextI,vPrevJ) && !BOP_collinear(vPrevJ,vPrevI,vOpp)
            && BOP_convex(vOpp,vPrevI,vPrevJ,vNextI)) {
            faceK = new BOP_Face4(opp,prevI,prevJ,nextI,faceI->getPlane(),faceI->getOriginalFace());
            faceK->setTAG(faceI->getTAG());
        }
    }
    else if (nextI == prevJ) {
        if (BOP_between(vertex,vPrevI,vNextJ) && !BOP_collinear(vNextJ,vNextI,vOpp)
            && BOP_convex(vOpp,vPrevI,vNextJ,vNextI)) {
            faceK = new BOP_Face4(opp,prevI,nextJ,nextI,faceI->getPlane(),faceI->getOriginalFace());
            faceK->setTAG(faceI->getTAG());
        }
    }
    return faceK;
}

BOP_Face* BOP_Merge::mergeFaces(BOP_Face4 *faceI, BOP_Face3 *faceJ, BOP_Indexs &pending, BOP_Index v)
{
    BOP_Face *faceK = NULL;

    // Get faces data
    BOP_Index prevI, nextI, opp, prevJ, nextJ;
    faceI->getNeighbours(v,prevI,nextI,opp);
    faceJ->getNeighbours(v,prevJ,nextJ);
    MT_Point3 vertex = m_mesh->getVertex(v)->getPoint();
    MT_Point3 vOpp = m_mesh->getVertex(opp)->getPoint();
    MT_Point3 vPrevI = m_mesh->getVertex(prevI)->getPoint();
    MT_Point3 vNextI = m_mesh->getVertex(nextI)->getPoint();
    MT_Point3 vPrevJ = m_mesh->getVertex(prevJ)->getPoint();
    MT_Point3 vNextJ = m_mesh->getVertex(nextJ)->getPoint();

    // Merge test
    if (prevI == nextJ) {
        if (BOP_between(vertex,vNextI,vPrevJ)) {
            if (!BOP_collinear(vPrevJ,vPrevI,vOpp) && BOP_convex(vOpp,vPrevI,vPrevJ,vNextI)) {
                // The result is a new quad
                faceK = new BOP_Face4(opp,prevI,prevJ,nextI,faceI->getPlane(),faceI->getOriginalFace());
                faceK->setTAG(faceI->getTAG());
            }
            else if (BOP_between(vPrevI,vPrevJ,vOpp)) {
                // The result is a triangle (only if prevI can be merged)
                if (prevI < m_firstVertex) return NULL; // It can't be merged
                faceK = new BOP_Face3(nextI,opp,prevJ,faceI->getPlane(),faceI->getOriginalFace());
                faceK->setTAG(faceI->getTAG());
                if (!containsIndex(pending, prevI)) pending.push_back(prevI);
            }
        }
    }
    else if (nextI == prevJ) {
        if (BOP_between(vertex,vPrevI,vNextJ)) {
            if (!BOP_collinear(vNextJ,vNextI,vOpp) && BOP_convex(vOpp,vPrevI,vNextJ,vNextI)) {
                // The result is a new quad
                faceK = new BOP_Face4(opp,prevI,nextJ,nextI,faceI->getPlane(),faceI->getOriginalFace());
                faceK->setTAG(faceI->getTAG());
            }
            else if (BOP_between(vNextI,vOpp,vNextJ)) {
                // The result is a triangle (only if nextI can be merged)
                if (nextI < m_firstVertex) return NULL;
                faceK = new BOP_Face3(prevI,nextJ,opp,faceI->getPlane(),faceI->getOriginalFace());
                faceK->setTAG(faceI->getTAG());
                if (!containsIndex(pending, nextI)) pending.push_back(nextI);
            }
        }
    }
    return faceK;
}

BOP_Face* BOP_Merge::mergeFaces(BOP_Face4 *faceI, BOP_Face4 *faceJ, BOP_Indexs &pending, BOP_Index v)
{
    BOP_Face *faceK = NULL;

    // Get faces data
    BOP_Index prevI, nextI, oppI, prevJ, nextJ, oppJ;
    faceI->getNeighbours(v,prevI,nextI,oppI);
    faceJ->getNeighbours(v,prevJ,nextJ,oppJ);
    MT_Point3 vertex = m_mesh->getVertex(v)->getPoint();
    MT_Point3 vPrevI = m_mesh->getVertex(prevI)->getPoint();
    MT_Point3 vNextI = m_mesh->getVertex(nextI)->getPoint();
    MT_Point3 vOppI = m_mesh->getVertex(oppI)->getPoint();
    MT_Point3 vPrevJ = m_mesh->getVertex(prevJ)->getPoint();
    MT_Point3 vNextJ = m_mesh->getVertex(nextJ)->getPoint();
    MT_Point3 vOppJ = m_mesh->getVertex(oppJ)->getPoint();

    // Merge test
    if (prevI == nextJ) {
        // prevI/nextJ will be a new vertex required to merge
        if (prevI < m_firstVertex) return NULL; // It can't be merged
        if (BOP_between(vertex,vPrevJ,vNextI) && BOP_between(vNextJ,vOppJ,vOppI)) {
            faceK = new BOP_Face4(oppJ,prevJ,nextI,oppI,faceI->getPlane(),faceI->getOriginalFace());
            faceK->setTAG(faceI->getTAG());
            // We add prevI to the pending list if it wasn't yet
            if (!containsIndex(pending, prevI)) pending.push_back(prevI);
        }
    }
    else if (nextI == prevJ) {
        // nextI/prevJ will be a new vertex required to merge
        if (nextI < m_firstVertex) return NULL; // It can't be merged
        if (BOP_between(vertex,vPrevI,vNextJ) && BOP_between(vNextI,vOppI,vOppJ)) {
            faceK = new BOP_Face4(oppI,prevI,nextJ,oppJ,faceI->getPlane(),faceI->getOriginalFace());
            faceK->setTAG(faceI->getTAG());
            // Add nextI to the pending list if it wasn't yet
            if (!containsIndex(pending, nextI)) pending.push_back(nextI);
        }
    }
    return faceK;
}


bool BOP_Merge::createQuads()
{
  
    BOP_Faces quads;
    
    // Get mesh faces
    BOP_Faces faces = m_mesh->getFaces();

    
    // Merge mesh triangles
    const BOP_IT_Faces facesIEnd = (faces.end()-1);
    const BOP_IT_Faces facesJEnd = faces.end();
    for(BOP_IT_Faces faceI=faces.begin();faceI!=facesIEnd;faceI++) {
        if ((*faceI)->getTAG() == BROKEN || (*faceI)->size() != 3) continue;
        for(BOP_IT_Faces faceJ=(faceI+1);faceJ!=facesJEnd;faceJ++) {
            if ((*faceJ)->getTAG() == BROKEN || (*faceJ)->size() != 3 ||
                (*faceJ)->getOriginalFace() != (*faceI)->getOriginalFace()) continue;

            // Test if both triangles share a vertex index
            BOP_Index v;
            bool found = false;
            for(unsigned int i=0;i<3 && !found;i++) {
                v = (*faceI)->getVertex(i);
                found = (*faceJ)->containsVertex(v);
                
            }
            if (!found) continue;

            BOP_Face *faceK = createQuad((BOP_Face3*)*faceI,(BOP_Face3*)*faceJ,v);
            if (faceK != NULL) {
                // Set triangles to BROKEN
                (*faceI)->setTAG(BROKEN);
                (*faceJ)->setTAG(BROKEN);
                quads.push_back(faceK);
                break;
            }
        }
    }

    // Add quads to mesh
    const BOP_IT_Faces quadsEnd = quads.end();
    for(BOP_IT_Faces quad=quads.begin();quad!=quadsEnd;quad++) m_mesh->addFace(*quad);
    return (quads.size() > 0);
}

BOP_Face* BOP_Merge::createQuad(BOP_Face3 *faceI, BOP_Face3 *faceJ, BOP_Index v)
{
    BOP_Face *faceK = NULL;

    // Get faces data
    BOP_Index prevI, nextI, prevJ, nextJ;
    faceI->getNeighbours(v,prevI,nextI);
    faceJ->getNeighbours(v,prevJ,nextJ);
    MT_Point3 vertex = m_mesh->getVertex(v)->getPoint();
    MT_Point3 vPrevI = m_mesh->getVertex(prevI)->getPoint();
    MT_Point3 vNextI = m_mesh->getVertex(nextI)->getPoint();
    MT_Point3 vPrevJ = m_mesh->getVertex(prevJ)->getPoint();
    MT_Point3 vNextJ = m_mesh->getVertex(nextJ)->getPoint();

    // Quad test
    if (prevI == nextJ) {
        if (!BOP_collinear(vNextI,vertex,vPrevJ) && !BOP_collinear(vNextI,vPrevI,vPrevJ) &&
            BOP_convex(vertex,vNextI,vPrevI,vPrevJ)) {
                faceK = new BOP_Face4(v,nextI,prevI,prevJ,faceI->getPlane(),faceI->getOriginalFace());
                faceK->setTAG(faceI->getTAG());
        }
    }
    else if (nextI == prevJ) {
        if (!BOP_collinear(vPrevI,vertex,vNextJ) && !BOP_collinear(vPrevI,vNextI,vNextJ) &&
            BOP_convex(vertex,vNextJ,vNextI,vPrevI)) {
                faceK = new BOP_Face4(v,nextJ,nextI,prevI,faceI->getPlane(),faceI->getOriginalFace());
                faceK->setTAG(faceI->getTAG());
            }
    }
    return faceK;
}

bool BOP_Merge::containsIndex(BOP_Indexs indexs, BOP_Index i)
{
  const BOP_IT_Indexs indexsEnd = indexs.end();
    for(BOP_IT_Indexs it=indexs.begin();it!=indexsEnd;it++) {
        if (*it == i) return true;
    }
    return false;
}

void BOP_Merge::getFaces(BOP_LFaces &facesByOriginalFace, BOP_Index v)
{
    // Get edges with vertex v
    BOP_Indexs edgeIndexs = m_mesh->getVertex(v)->getEdges();
    const BOP_IT_Indexs edgeEnd = edgeIndexs.end();
    for(BOP_IT_Indexs edgeIndex = edgeIndexs.begin();edgeIndex != edgeEnd;edgeIndex++) {    
        // Foreach edge, add its no broken faces to the output list
        BOP_Edge* edge = m_mesh->getEdge(*edgeIndex);
        BOP_Indexs faceIndexs = edge->getFaces();
        const BOP_IT_Indexs faceEnd = faceIndexs.end();
        for(BOP_IT_Indexs faceIndex=faceIndexs.begin();faceIndex!=faceEnd;faceIndex++) {
            BOP_Face* face = m_mesh->getFace(*faceIndex);
            if (face->getTAG() != BROKEN) {
                bool found = false;
                // Search if we already have created a list for the 
                // faces that come from the same original face
                const BOP_IT_LFaces lfEnd = facesByOriginalFace.end();
                for(BOP_IT_LFaces facesByOriginalFaceX=facesByOriginalFace.begin();
                facesByOriginalFaceX!=lfEnd; facesByOriginalFaceX++) {
                    if (((*facesByOriginalFaceX)[0])->getOriginalFace() == face->getOriginalFace()) {
                        // Search that the face has not been added to the list before
                        for(unsigned int i = 0;i<(*facesByOriginalFaceX).size();i++) {
                            if ((*facesByOriginalFaceX)[i] == face) {
                                found = true;
                                break;
                            }
                        }
                        if (!found) {
                            // Add the face to the list
                          if (face->getTAG()==OVERLAPPED) facesByOriginalFaceX->insert(facesByOriginalFaceX->begin(),face);
                          else facesByOriginalFaceX->push_back(face);
                          found = true;
                        }
                        break;
                    }
                }
                if (!found) {
                    // Create a new list and add the current face
                    BOP_Faces facesByOriginalFaceX;
                    facesByOriginalFaceX.push_back(face);
                    facesByOriginalFace.push_back(facesByOriginalFaceX);
                }
            }
        }
    }
}

void BOP_Merge::getFaces(BOP_LFaces &facesByOriginalFace, BOP_Indexs vertices, BOP_Index v)
{
    // Get edges with vertex v
    BOP_Indexs edgeIndexs = m_mesh->getVertex(v)->getEdges();
    const BOP_IT_Indexs edgeEnd = edgeIndexs.end();
    for(BOP_IT_Indexs edgeIndex = edgeIndexs.begin();edgeIndex != edgeEnd;edgeIndex++) {    
        // Foreach edge, add its no broken faces to the output list
        BOP_Edge* edge = m_mesh->getEdge(*edgeIndex);
        BOP_Indexs faceIndexs = edge->getFaces();
        const BOP_IT_Indexs faceEnd = faceIndexs.end();
        for(BOP_IT_Indexs faceIndex=faceIndexs.begin();faceIndex!=faceEnd;faceIndex++) {
            BOP_Face* face = m_mesh->getFace(*faceIndex);
            if (face->getTAG() != BROKEN) {
                // Search if the face contains any of the forbidden vertices
                bool found = false;
                for(BOP_IT_Indexs vertex = vertices.begin();*vertex!= v;vertex++) {
                    if (face->containsVertex(*vertex)) {
                        // face contains a forbidden vertex!
                        found = true;
                        break;
                }
            }
            if (!found) {
                // Search if we already have created a list with the 
                // faces that come from the same original face
              const BOP_IT_LFaces lfEnd = facesByOriginalFace.end();
                for(BOP_IT_LFaces facesByOriginalFaceX=facesByOriginalFace.begin();
                    facesByOriginalFaceX!=lfEnd; facesByOriginalFaceX++) {
                    if (((*facesByOriginalFaceX)[0])->getOriginalFace() == face->getOriginalFace()) {
                        // Search that the face has not been added to the list before
                        for(unsigned int i = 0;i<(*facesByOriginalFaceX).size();i++) {
                            if ((*facesByOriginalFaceX)[i] == face) {
                                found = true;
                                break;
                            }
                        }
                        if (!found) {
                          // Add face to the list
                          if (face->getTAG()==OVERLAPPED) facesByOriginalFaceX->insert(facesByOriginalFaceX->begin(),face);
                          else facesByOriginalFaceX->push_back(face);
                          found = true;
                        }
                        break;
                    }
                }
                if (!found) {
                    // Create a new list and add the current face
                    BOP_Faces facesByOriginalFaceX;
                    facesByOriginalFaceX.push_back(face);
                    facesByOriginalFace.push_back(facesByOriginalFaceX);
                }
            }
        }
    }
    }
}

#endif  /* BOP_ORIG_MERGE */