bool LoadOBJ()

in GraphSampling/meshLoader.h [125:219]
93 lines of code
17 McCabe index (conditional complexity)

    bool LoadOBJ(const string & fileName,
                 vector< Vec3<float> > & points,
                 vector< Vec3<int> > & triangles)
    {
        const char ObjDelimiters[]=" /";
        const unsigned int BufferSize = 1024;
        FILE * fid = fopen(fileName.c_str(), "r");

        if (fid)
        {
            char buffer[BufferSize];
            Vec3<int> ip;
            Vec3<int> in;
            Vec3<int> it;
            char * pch;
            char * str;
            size_t nn = 0;
            size_t nt = 0;
            Vec3<float> x;
            while (!feof(fid))
            {
                if (!fgets(buffer, BufferSize, fid))
                {
                    break;
                }
                else if (buffer[0] == 'v')
                {
                    if (buffer[1] == ' ')
                    {
                        str = buffer+2;
                        for(int k = 0; k < 3; ++k)
                        {
                            pch = strtok (str, " ");
                            if (pch) x[k] = static_cast<float>(atof(pch));
                            else
                            {
                                return false;
                            }
                            str = NULL;
                        }
                        points.push_back(x);
                    }
                    else if (buffer[1] == 'n')
                    {
                        ++nn;
                    }
                    else if (buffer[1] == 't')
                    {
                        ++nt;
                    }
                }
                else if (buffer[0] == 'f')
                {

                    str = buffer+2;
                    for(int k = 0; k < 3; ++k)
                    {
                        pch = strtok (str, ObjDelimiters);
                        if (pch) ip[k] = atoi(pch) - 1;
                        else
                        {
                            return false;
                        }
                        str = NULL;
                        if (nt > 0)
                        {
                            pch = strtok (NULL, ObjDelimiters);
                            if (pch)  it[k] = atoi(pch) - 1;
                            else
                            {
                                return false;
                            }
                        }
                        if (nn > 0)
                        {
                            pch = strtok (NULL, ObjDelimiters);
                            if (pch)  in[k] = atoi(pch) - 1;
                            else
                            {
                                return false;
                            }
                        }
                    }
                    triangles.push_back(ip);
                }
            }
            fclose(fid);
        }
        else
        {
            cout << "File not found" << endl;
            return false;
        }
        return true;
    }