public void buildFromSegmentSoup(std_vector<Segment3D> segList, ref std_vector<Path> @out)
 {
     //typedef std::multimap<Vector3, Vector3, Vector3Comparator> Vec3MultiMap;
     //Vec3MultiMap segs;
    std_multimap<Vector3,Vector3>segs=new std_multimap<Vector3,Vector3>(new Vector3Comparator());
    // for (std::vector<Segment3D>::const_iterator it = segList.begin(); it != segList.end(); ++it)
    foreach(var it in segList)
    {
         //segs.insert(std::pair<Vector3, Vector3 > (it->mA, it->mB));
         //segs.insert(std::pair<Vector3, Vector3 > (it->mB, it->mA));
        segs.insert(it.mA,it.mB);
        segs.insert(it.mB,it.mA);
     }
     while (!segs.empty())
     {
        Vector3 headFirst = segs.get(0).first;//segs.begin()->first;
         Vector3 headSecond = segs.get(0).second[0];//segs.begin()->second;
         Path p=new Path();
         p.addPoint(headFirst).addPoint(headSecond);
         //Vec3MultiMap::iterator firstSeg = segs.begin();
         int firstSeg_pos=segs.begin();
         Vector3 firstSeg=segs.get(0).first;
         //std::pair<Vec3MultiMap::iterator, Vec3MultiMap::iterator> correspondants2 = segs.equal_range(headSecond);
        std_pair<std_pair<Vector3,List<Vector3>>,std_pair<Vector3,List<Vector3>>>  correspondants2 = segs.equal_range(headSecond);
         //for (Vec3MultiMap::iterator it = correspondants2.first; it != correspondants2.second;)
         for(int i=correspondants2.first.second.Count-1;i>=0;i--)
         {
            // Vec3MultiMap::iterator removeIt = it++;
             Vector3 removeIt=correspondants2.first.second[i];
             //if ((removeIt->second - firstSeg->first).squaredLength() < 1e-8)
             if((removeIt-firstSeg).SquaredLength<1e-8)
                 segs.erase(removeIt);
         }
         segs.erase(firstSeg);
         bool foundSomething = true;
         while (!segs.empty() && foundSomething)
         {
             foundSomething = false;
             //Vec3MultiMap::iterator next = segs.find(headSecond);
             int next_pos = segs.find(headSecond);
             //if (next != segs.end())
             if(next_pos!=-1)
             {
                 std_pair<Vector3,List<Vector3>>next=segs.get((uint)next_pos);
                 foundSomething = true;
                 headSecond = next.second[0];
                 p.addPoint(headSecond);
                 //std::pair<Vec3MultiMap::iterator, Vec3MultiMap::iterator> correspondants = segs.equal_range(headSecond);
                 std_pair<std_pair<Vector3,List<Vector3>>,std_pair<Vector3,List<Vector3>>>correspondants = segs.equal_range(headSecond);
                 //for (Vec3MultiMap::iterator it = correspondants.first; it != correspondants.second;)
                 for (int i = correspondants.first.second.Count - 1; i >= 0;i-- ) {
                     //Vec3MultiMap::iterator removeIt = it++;
                     Vector3 removeIt = correspondants.first.second[i];
                     //if ((removeIt->second - next->first).squaredLength() < 1e-8)
                     if ((removeIt - next.first).SquaredLength < 1e-8)
                         segs.erase(removeIt);
                 }
                 //segs.erase(next);
                 segs.erase(next.first);
             }
             //Vec3MultiMap::iterator previous = segs.find(headFirst);
             int previous_pos=segs.find(headFirst);
             //if (previous != segs.end())
             if(previous_pos!=-1)
             {
                 std_pair<Vector3, List<Vector3>> previous = segs.get((uint)previous_pos);
                 foundSomething = true;
                 //p.insertPoint(0, previous.second);
                 p.insertPoint(0, previous.second[0]);//???
                 headFirst = previous.second[0];
                 //std::pair<Vec3MultiMap::iterator, Vec3MultiMap::iterator> correspondants = segs.equal_range(headFirst);
                 std_pair<std_pair<Vector3,List<Vector3>>,std_pair<Vector3,List<Vector3>>>correspondants = segs.equal_range(headFirst);
                 //for (Vec3MultiMap::iterator it = correspondants.first; it != correspondants.second;)
                 for(int i=correspondants.first.second.Count-1;i>=0;i--)
                 {
                     //Vec3MultiMap::iterator removeIt = it++;
                     Vector3 removeIt=correspondants.first.second[i];
                     //if ((removeIt->second - previous->first).squaredLength() < 1e-8)
                     if((removeIt-previous.first).SquaredLength<1e-8) 
                     segs.erase(removeIt);
                 }
                 //segs.erase(previous);
                 segs.erase(previous.first);
             }
         }
         if ((p.getPoint(0)-p.getPoint(p.getSegCount() + 1)).SquaredLength < 1e-6)
         {
             p.getPointsReference().pop_back();
             p.close();
         }
         @out.push_back(p);
     }
 }
示例#2
0
        //-----------------------------------------------------------------------

        //
        //ORIGINAL LINE: void addToTriangleBuffer(TriangleBuffer& buffer) const
        public override void addToTriangleBuffer(ref TriangleBuffer buffer)
        {
            std_vector <TriangleBuffer.Vertex> vec1 = mMesh1.getVertices();
            std_vector <int> ind1 = mMesh1.getIndices();
            std_vector <TriangleBuffer.Vertex> vec2 = mMesh2.getVertices();
            std_vector <int> ind2 = mMesh2.getIndices();
            Segment3D        intersectionResult = new Segment3D();

            std_vector <Intersect> intersectionList = new std_vector <Intersect>();

            // Find all intersections between mMesh1 and mMesh2
            int idx1 = 0;

            //for (std::vector<int>::const_iterator it = ind1.begin(); it != ind1.end(); idx1++)
            for (int i = 0; i < ind1.Count; i += 3, idx1++)
            {
                int it = ind1[i];
                //Triangle3D t1(vec1[*it++].mPosition, vec1[*it++].mPosition, vec1[*it++].mPosition);
                Triangle3D t1   = new Triangle3D(vec1[it].mPosition, vec1[it + 1].mPosition, vec1[it + 2].mPosition);
                int        idx2 = 0;
                //for (std::vector<int>::const_iterator it2 = ind2.begin(); it2 != ind2.end(); idx2++)
                for (int j = 0; j < ind2.Count; j += 3, idx2++)
                {
                    int it2 = ind2[j];
                    //Triangle3D t2(vec2[*it2++].mPosition, vec2[*it2++].mPosition, vec2[*it2++].mPosition);
                    Triangle3D t2 = new Triangle3D(vec2[it2].mPosition, vec2[it2 + 1].mPosition, vec2[it2 + 2].mPosition);
                    if (t1.findIntersect(t2, ref intersectionResult))
                    {
                        Intersect intersect = new Intersect(intersectionResult, idx1, idx2);
                        intersectionList.push_back(intersect);
                    }
                }
            }
            // Remove all intersection segments too small to be relevant
            //for (std::vector<Intersect>::iterator it = intersectionList.begin(); it != intersectionList.end();)
            //    if ((it.mSeg.mB - it.mSeg.mA).squaredLength() < 1e-8)
            //        it = intersectionList.erase(it);
            //    else
            //        ++it;
            for (int i = intersectionList.Count - 1; i >= 0; i--)
            {
                Intersect it = intersectionList[i];
                if ((it.mSeg.mB - it.mSeg.mA).SquaredLength < 1e-8)
                {
                    intersectionList.erase((uint)i);
                }
            }


            // Retriangulate
            TriangleBuffer newMesh1 = new TriangleBuffer();
            TriangleBuffer newMesh2 = new TriangleBuffer();

            GlobalMembersProceduralBoolean._retriangulate(ref newMesh1, mMesh1, intersectionList, true);
            GlobalMembersProceduralBoolean._retriangulate(ref newMesh2, mMesh2, intersectionList, false);

            //buffer.append(newMesh1);
            //buffer.append(newMesh2);
            //return;

            // Trace contours
            std_vector <Path>      contours    = new std_vector <Path>();
            std_vector <Segment3D> segmentSoup = new std_vector <Segment3D>();

            //for (std::vector<Intersect>::iterator it = intersectionList.begin(); it != intersectionList.end(); ++it)
            foreach (var it in intersectionList)
            {
                segmentSoup.push_back(it.mSeg);
            }
            new Path().buildFromSegmentSoup(segmentSoup, ref contours);

            // Build a lookup from segment to triangle
            TriLookup triLookup1 = new std_multimap <Segment3D, int>(new Seg3Comparator()), triLookup2 = new std_multimap <Segment3D, int>(new Seg3Comparator());

            GlobalMembersProceduralBoolean._buildTriLookup(ref triLookup1, newMesh1);
            GlobalMembersProceduralBoolean._buildTriLookup(ref triLookup2, newMesh2);

            std_set <Segment3D> limits = new std_set <Segment3D>(new Seg3Comparator());

            //for (std::vector<Segment3D>::iterator it = segmentSoup.begin(); it != segmentSoup.end(); ++it)
            foreach (var it in segmentSoup)
            {
                limits.insert(it.orderedCopy());
            }
            // Build resulting mesh
            //for (std::vector<Path>::iterator it = contours.begin(); it != contours.end(); ++it)
            foreach (var it in contours)
            {
                // Find 2 seed triangles for each contour
                Segment3D firstSeg = new Segment3D(it.getPoint(0), it.getPoint(1));
                //std_pair<TriLookup::iterator, TriLookup::iterator> it2mesh1 = triLookup1.equal_range(firstSeg.orderedCopy());
                //std_pair<TriLookup::iterator, TriLookup::iterator> it2mesh2 = triLookup2.equal_range(firstSeg.orderedCopy());
                std_pair <std_pair <Segment3D, List <int> >, std_pair <Segment3D, List <int> > > it2mesh1 = triLookup1.equal_range(firstSeg.orderedCopy());
                std_pair <std_pair <Segment3D, List <int> >, std_pair <Segment3D, List <int> > > it2mesh2 = triLookup2.equal_range(firstSeg.orderedCopy());
                int mesh1seed1 = 0, mesh1seed2 = 0, mesh2seed1 = 0, mesh2seed2 = 0;

                //if (it2mesh1.first != triLookup1.end() && it2mesh2.first != triLookup2.end())
                if (it2mesh1.first != null && it2mesh2.first != null)
                {
                    // check which of seed1 and seed2 must be included (it can be 0, 1 or both)
                    //mesh1seed1 = it2mesh1.first.second;
                    //mesh1seed2 = (--it2mesh1.second).second;
                    //mesh2seed1 = it2mesh2.first.second;
                    //mesh2seed2 = (--it2mesh2.second).second;
                    mesh1seed1 = it2mesh1.first.second[0];
                    mesh1seed2 = it2mesh1.first.second[it2mesh1.first.second.Count - 1]; //(--it2mesh1.second).second[0];
                    mesh2seed1 = it2mesh2.first.second[0];
                    mesh2seed2 = it2mesh2.first.second[it2mesh2.first.second.Count - 1]; //(--it2mesh2.second).second[0];

                    if (mesh1seed1 == mesh1seed2)
                    {
                        mesh1seed2 = -1;
                    }
                    if (mesh2seed1 == mesh2seed2)
                    {
                        mesh2seed2 = -1;
                    }

                    Vector3 vMesh1 = new Vector3(0f, 0f, 0f), nMesh1 = new Vector3(0f, 0f, 0f), vMesh2 = new Vector3(0f, 0f, 0f), nMesh2 = new Vector3(0f, 0f, 0f);
                    for (int i = 0; i < 3; i++)
                    {
                        Vector3 pos = newMesh1.getVertices()[newMesh1.getIndices()[mesh1seed1 * 3 + i]].mPosition;
                        if ((pos - firstSeg.mA).SquaredLength > 1e-6 && (pos - firstSeg.mB).SquaredLength > 1e-6)
                        {
                            vMesh1 = pos;
                            nMesh1 = newMesh1.getVertices()[newMesh1.getIndices()[mesh1seed1 * 3 + i]].mNormal;
                            break;
                        }
                    }

                    for (int i = 0; i < 3; i++)
                    {
                        Vector3 pos = newMesh2.getVertices()[newMesh2.getIndices()[mesh2seed1 * 3 + i]].mPosition;
                        if ((pos - firstSeg.mA).SquaredLength > 1e-6 && (pos - firstSeg.mB).SquaredLength > 1e-6)
                        {
                            vMesh2 = pos;
                            nMesh2 = newMesh2.getVertices()[newMesh2.getIndices()[mesh2seed1 * 3 + i]].mNormal;
                            break;
                        }
                    }

                    bool M2S1InsideM1 = (nMesh1.DotProduct(vMesh2 - firstSeg.mA) < 0f);
                    bool M1S1InsideM2 = (nMesh2.DotProduct(vMesh1 - firstSeg.mA) < 0f);

                    GlobalMembersProceduralBoolean._removeFromTriLookup(mesh1seed1, ref triLookup1);
                    GlobalMembersProceduralBoolean._removeFromTriLookup(mesh2seed1, ref triLookup2);
                    GlobalMembersProceduralBoolean._removeFromTriLookup(mesh1seed2, ref triLookup1);
                    GlobalMembersProceduralBoolean._removeFromTriLookup(mesh2seed2, ref triLookup2);

                    // Recursively add all neighbours of these triangles
                    // Stop when a contour is touched
                    switch (mBooleanOperation)
                    {
                    case BooleanOperation.BT_UNION:
                        if (M1S1InsideM2)
                        {
                            GlobalMembersProceduralBoolean._recursiveAddNeighbour(ref buffer, newMesh1, mesh1seed2, ref triLookup1, limits, false);
                        }
                        else
                        {
                            GlobalMembersProceduralBoolean._recursiveAddNeighbour(ref buffer, newMesh1, mesh1seed1, ref triLookup1, limits, false);
                        }
                        if (M2S1InsideM1)
                        {
                            GlobalMembersProceduralBoolean._recursiveAddNeighbour(ref buffer, newMesh2, mesh2seed2, ref triLookup2, limits, false);
                        }
                        else
                        {
                            GlobalMembersProceduralBoolean._recursiveAddNeighbour(ref buffer, newMesh2, mesh2seed1, ref triLookup2, limits, false);
                        }
                        break;

                    case BooleanOperation.BT_INTERSECTION:
                        if (M1S1InsideM2)
                        {
                            GlobalMembersProceduralBoolean._recursiveAddNeighbour(ref buffer, newMesh1, mesh1seed1, ref triLookup1, limits, false);
                        }
                        else
                        {
                            GlobalMembersProceduralBoolean._recursiveAddNeighbour(ref buffer, newMesh1, mesh1seed2, ref triLookup1, limits, false);
                        }
                        if (M2S1InsideM1)
                        {
                            GlobalMembersProceduralBoolean._recursiveAddNeighbour(ref buffer, newMesh2, mesh2seed1, ref triLookup2, limits, false);
                        }
                        else
                        {
                            GlobalMembersProceduralBoolean._recursiveAddNeighbour(ref buffer, newMesh2, mesh2seed2, ref triLookup2, limits, false);
                        }
                        break;

                    case BooleanOperation.BT_DIFFERENCE:
                        if (M1S1InsideM2)
                        {
                            GlobalMembersProceduralBoolean._recursiveAddNeighbour(ref buffer, newMesh1, mesh1seed2, ref triLookup1, limits, false);
                        }
                        else
                        {
                            GlobalMembersProceduralBoolean._recursiveAddNeighbour(ref buffer, newMesh1, mesh1seed1, ref triLookup1, limits, false);
                        }
                        if (M2S1InsideM1)
                        {
                            GlobalMembersProceduralBoolean._recursiveAddNeighbour(ref buffer, newMesh2, mesh2seed1, ref triLookup2, limits, true);
                        }
                        else
                        {
                            GlobalMembersProceduralBoolean._recursiveAddNeighbour(ref buffer, newMesh2, mesh2seed2, ref triLookup2, limits, true);
                        }
                        break;
                    }
                }
            }
        }
示例#3
0
        public void buildFromSegmentSoup(std_vector <Segment3D> segList, ref std_vector <Path> @out)
        {
            //typedef std::multimap<Vector3, Vector3, Vector3Comparator> Vec3MultiMap;
            //Vec3MultiMap segs;
            std_multimap <Vector3, Vector3> segs = new std_multimap <Vector3, Vector3>(new Vector3Comparator());

            // for (std::vector<Segment3D>::const_iterator it = segList.begin(); it != segList.end(); ++it)
            foreach (var it in segList)
            {
                //segs.insert(std::pair<Vector3, Vector3 > (it->mA, it->mB));
                //segs.insert(std::pair<Vector3, Vector3 > (it->mB, it->mA));
                segs.insert(it.mA, it.mB);
                segs.insert(it.mB, it.mA);
            }
            while (!segs.empty())
            {
                Vector3 headFirst  = segs.get(0).first;     //segs.begin()->first;
                Vector3 headSecond = segs.get(0).second[0]; //segs.begin()->second;
                Path    p          = new Path();
                p.addPoint(headFirst).addPoint(headSecond);
                //Vec3MultiMap::iterator firstSeg = segs.begin();
                int     firstSeg_pos = segs.begin();
                Vector3 firstSeg     = segs.get(0).first;
                //std::pair<Vec3MultiMap::iterator, Vec3MultiMap::iterator> correspondants2 = segs.equal_range(headSecond);
                std_pair <std_pair <Vector3, List <Vector3> >, std_pair <Vector3, List <Vector3> > > correspondants2 = segs.equal_range(headSecond);
                //for (Vec3MultiMap::iterator it = correspondants2.first; it != correspondants2.second;)
                for (int i = correspondants2.first.second.Count - 1; i >= 0; i--)
                {
                    // Vec3MultiMap::iterator removeIt = it++;
                    Vector3 removeIt = correspondants2.first.second[i];
                    //if ((removeIt->second - firstSeg->first).squaredLength() < 1e-8)
                    if ((removeIt - firstSeg).SquaredLength < 1e-8)
                    {
                        segs.erase(removeIt);
                    }
                }
                segs.erase(firstSeg);
                bool foundSomething = true;
                while (!segs.empty() && foundSomething)
                {
                    foundSomething = false;
                    //Vec3MultiMap::iterator next = segs.find(headSecond);
                    int next_pos = segs.find(headSecond);
                    //if (next != segs.end())
                    if (next_pos != -1)
                    {
                        std_pair <Vector3, List <Vector3> > next = segs.get((uint)next_pos);
                        foundSomething = true;
                        headSecond     = next.second[0];
                        p.addPoint(headSecond);
                        //std::pair<Vec3MultiMap::iterator, Vec3MultiMap::iterator> correspondants = segs.equal_range(headSecond);
                        std_pair <std_pair <Vector3, List <Vector3> >, std_pair <Vector3, List <Vector3> > > correspondants = segs.equal_range(headSecond);
                        //for (Vec3MultiMap::iterator it = correspondants.first; it != correspondants.second;)
                        for (int i = correspondants.first.second.Count - 1; i >= 0; i--)
                        {
                            //Vec3MultiMap::iterator removeIt = it++;
                            Vector3 removeIt = correspondants.first.second[i];
                            //if ((removeIt->second - next->first).squaredLength() < 1e-8)
                            if ((removeIt - next.first).SquaredLength < 1e-8)
                            {
                                segs.erase(removeIt);
                            }
                        }
                        //segs.erase(next);
                        segs.erase(next.first);
                    }
                    //Vec3MultiMap::iterator previous = segs.find(headFirst);
                    int previous_pos = segs.find(headFirst);
                    //if (previous != segs.end())
                    if (previous_pos != -1)
                    {
                        std_pair <Vector3, List <Vector3> > previous = segs.get((uint)previous_pos);
                        foundSomething = true;
                        //p.insertPoint(0, previous.second);
                        p.insertPoint(0, previous.second[0]);//???
                        headFirst = previous.second[0];
                        //std::pair<Vec3MultiMap::iterator, Vec3MultiMap::iterator> correspondants = segs.equal_range(headFirst);
                        std_pair <std_pair <Vector3, List <Vector3> >, std_pair <Vector3, List <Vector3> > > correspondants = segs.equal_range(headFirst);
                        //for (Vec3MultiMap::iterator it = correspondants.first; it != correspondants.second;)
                        for (int i = correspondants.first.second.Count - 1; i >= 0; i--)
                        {
                            //Vec3MultiMap::iterator removeIt = it++;
                            Vector3 removeIt = correspondants.first.second[i];
                            //if ((removeIt->second - previous->first).squaredLength() < 1e-8)
                            if ((removeIt - previous.first).SquaredLength < 1e-8)
                            {
                                segs.erase(removeIt);
                            }
                        }
                        //segs.erase(previous);
                        segs.erase(previous.first);
                    }
                }
                if ((p.getPoint(0) - p.getPoint(p.getSegCount() + 1)).SquaredLength < 1e-6)
                {
                    p.getPointsReference().pop_back();
                    p.close();
                }
                @out.push_back(p);
            }
        }
示例#4
0
        //-----------------------------------------------------------------------
        public void buildFromSegmentSoup(std_vector <Segment2D> segList)
        {
            //std.multimap<Vector2, Vector2, Vector2Comparator> segs = new std.multimap<Vector2, Vector2, Vector2Comparator>();
            std_multimap <Vector2, Vector2> segs = new std_multimap <Vector2, Vector2>();

            // for (List<Segment2D>.Enumerator it = segList.GetEnumerator(); it.MoveNext(); ++it)
            foreach (var it in segList)
            {
                //segs.insert(std.pair<Vector2, Vector2 > (it.mA, it.mB));
                //segs.insert(std.pair<Vector2, Vector2 > (it.mB, it.mA));
                segs.insert(it.mA, it.mB);
                segs.insert(it.mB, it.mA);
            }
            while (!segs.empty())
            {
                Vector2 headFirst  = segs.get(0).first;     //segs.begin().first;
                Vector2 headSecond = segs.get(0).second[0]; //segs.begin().second;
                Shape   s          = new Shape();
                s.addPoint(headFirst).addPoint(headSecond);
                //std_multimap<Vector2, Vector2, Vector2Comparator>.Enumerator firstSeg = segs.begin();
                int firstSeg_pos = segs.begin();
                std_pair <Vector2, List <Vector2> > firstSeg = segs.get(0);
                // std.pair<std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator, std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator> correspondants2 = segs.equal_range(headSecond);
                std_pair <std_pair <Vector2, List <Vector2> >, std_pair <Vector2, List <Vector2> > > correspondants2 = segs.equal_range(headSecond);
                //for (std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator it = correspondants2.first; it != correspondants2.second;)
                //{
                //    std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator removeIt = ++it;
                //    if ((removeIt.second - firstSeg.first).squaredLength() < 1e-8)
                //        segs.erase(removeIt);
                //}
                for (int i = 1; i < correspondants2.first.second.Count; i++)
                {
                    Vector2 removeIt = correspondants2.first.second[i];
                    if ((removeIt - firstSeg.first).SquaredLength < 1e-8)
                    {
                        segs.erase(removeIt);
                    }
                }
                segs.erase(firstSeg.first);
                bool foundSomething = true;
                while (!segs.empty() && foundSomething)
                {
                    foundSomething = false;
                    //std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator next = segs.find(headSecond);
                    int next_pos = segs.find(headSecond);
                    // if (next != segs.end())
                    if (next_pos != -1)
                    {
                        std_pair <Vector2, List <Vector2> > next = segs.get((uint)next_pos);
                        foundSomething = true;
                        //headSecond = next.second;
                        headSecond = next.second[0];
                        s.addPoint(headSecond);
                        //std.pair<std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator, std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator> correspondants = segs.equal_range(headSecond);
                        std_pair <std_pair <Vector2, List <Vector2> >, std_pair <Vector2, List <Vector2> > > correspondants = segs.equal_range(headSecond);
                        //for (std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator it = correspondants.first; it != correspondants.second;)
                        //{
                        //    std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator removeIt = ++it;
                        //    if ((removeIt.second - next.first).squaredLength() < 1e-8)
                        //        segs.erase(removeIt);
                        //}
                        for (int j = 1; j < correspondants.first.second.Count; j++)
                        {
                            Vector2 removeIt = correspondants2.first.second[j];
                            if ((removeIt - next.first).SquaredLength < 1e-8)
                            {
                                segs.erase(removeIt);
                            }
                        }
                        //segs.erase(next);
                        segs.erase(next.first);
                    }
                    //std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator previous = segs.find(headFirst);
                    int previous_pos = segs.find(headFirst);
                    //if (previous != segs.end()) {
                    if (previous_pos != -1)
                    {
                        foundSomething = true;
                        std_pair <Vector2, List <Vector2> > previous = segs.get((uint)previous_pos);
                        // s.insertPoint(0, previous.second);
                        s.insertPoint(0, previous.second[0]);
                        //headFirst = previous.second;
                        headFirst = previous.second[0];
                        //std.pair<std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator, std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator> correspondants = segs.equal_range(headFirst);
                        std_pair <std_pair <Vector2, List <Vector2> >, std_pair <Vector2, List <Vector2> > > correspondants = segs.equal_range(headFirst);
                        //for (std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator it = correspondants.first; it != correspondants.second; ) {
                        for (int j = 1; j < correspondants.first.second.Count; j++)
                        {
                            //std.multimap<Vector2, Vector2, Vector2Comparator>.Enumerator removeIt = ++it;
                            //if ((removeIt.second - previous.first).squaredLength() < 1e-8)
                            //    segs.erase(removeIt);
                            Vector2 removeIt = correspondants.first.second[j];
                            if ((removeIt - previous.first).SquaredLength < 1e-8)
                            {
                                segs.erase(removeIt);
                            }
                        }
                        //segs.erase(previous);
                        segs.erase(previous.first);
                    }
                }
                if ((s.getPoint(0) - s.getPoint(s.getSegCount() + 1)).SquaredLength < 1e-6)
                {
                    s.getPointsReference().pop_back();
                    s.close();
                }
                addShape(s);
            }
        }