做图的网站百度知道提问

定义所需要的容器

extern QMap<QString,node> Station; //画图使用
extern QMap<QString,QList<QString> > edge; // 跑最短路
extern QMap<QString,QSet<QString> > Station_Line; // 站点所属线路总
extern QMap<QString,QColor> LineColor;  //  线路颜色
extern QMap<QString,QMap<QString,int> >dp; //两站点之间的距离；
extern QMap<QString,QMap<QString,QSet<QString> > >mp; //两站站点共同的线路

定义最大最小经纬度

extern double minLongi;
extern double minLati;
extern double maxLongi;
extern double maxLati;

统计站点信息 在经纬度网站

读取统计的信息存储到容器

void infoinit(){QFile file(":/src/lineQD.txt");file.open(QIODevice::ReadOnly);if(!file.isOpen()){qDebug()<<"error open";return ;}QTextStream in(&file);QString buffer;QString Name;QString Color;int Num;while(true){in>>buffer>>buffer;if(in.atEnd()) break;in>>buffer>>buffer; // line name;Name = buffer;in>>buffer>>buffer; // line colorColor = buffer;in>>buffer>>buffer; // startin>>buffer;         // endin>>buffer>>buffer; // station numNum = buffer.toInt();/*extern QMap<QString,node> Station; //画图使用extern QMap<QString,QList<QString> > edge; // 跑最短路extern QMap<QString,QSet<QString> > Station_Line; // 站点所属线路总extern QMap<QString,QString> LineColor;  //  线路颜色*/node stal[100];for(int i=0;i<Num;i++){  // 存储站点信息，存储站点所属线路in>>buffer>>stal[i].name>>stal[i].e>>stal[i].n;updateBound(stal[i].e,stal[i].n);qDebug()<<stal[i].name<<stal[i].e<<stal[i].n<<"\n";qDebug()<<maxLati<<" "<<maxLongi<<" "<<minLati<<" "<<minLongi<<"\n";Station[stal[i].name] = stal[i];Station_Line[stal[i].name].insert(Name);}node sta,laststa;for(int i=0;i<Num;i++){  //存储边if(i>=1) { edge[stal[i].name].append(stal[i-1].name); dp[stal[i].name][stal[i-1].name]=getDistance(stal[i].name,stal[i-1].name);mp[stal[i].name][stal[i-1].name].insert(Name);}if(i<Num-1) { edge[stal[i].name].append(stal[i+1].name); dp[stal[i].name][stal[i+1].name]=getDistance(stal[i].name,stal[i+1].name);mp[stal[i].name][stal[i+1].name].insert(Name);}}LineColor[Name] = QColor(Color);   // 存储线路颜色}for(auto i:Station.keys()) {Station[i].coord.setX((Station[i].n-minLongi)/(maxLongi-minLongi)*1000+30);Station[i].coord.setY((Station[i].e-minLati)/(maxLati-minLati)*500+30);qDebug()<<Station[i].coord<<"\n";}return;
}

其他的一些相关函数

debug 显示存储的信息

void ddebug(){qDebug()<<"all station\n";QString s;for(auto &i:Station.keys()) {qDebug()<<Station[i].name<<" "<<Station[i].e<<" "<<Station[i].w<<" ";s=*Station_Line[i].begin();if(Station_Line[i].size()!=1)  qDebug()<<"black  ";}
}

更新最小最大经纬度的函数

void updateBound(const double lati,const double longi){if(minLati>lati)minLati=lati;if(maxLati<lati)maxLati=lati;if(minLongi>longi)minLongi=longi;if(maxLongi<longi)maxLongi=longi;
}

获取两点之间的距离 根据经纬度

int getDistance(const QString sta1,const QString sta2){const double EARTH_RADIUS = 6378.137;double rlati1 = Station[sta1].w * M_PI / 180;double rlati2 = Station[sta2].w * M_PI / 180;double rlongi1 = Station[sta1].e * M_PI / 180;double rlongi2 = Station[sta2].e * M_PI / 180;double vlongi = abs(rlongi1-rlongi2);double vlati = abs(rlati1-rlati2);double h = HaverSin(vlati)+cos(rlati1)*cos(rlati2)*HaverSin(vlongi);double ret = 2*EARTH_RADIUS*asin(sqrt(h));return (int)(ret*1000);
}
double HaverSin(double theta)
{double v = sin(theta / 2);return v * v;
}