Draw_extend使用OpenGL显示数据点

#ifndef_STRING2NUM_HPP_
#define_STRING2NUM_HPP_
#include<sstream>//使用istringstream必须包含的头文件
#include<string>
usingnamespacestd;
//模板函数：将string类型变量转换为常用的数值类型bymaowei
template<classType>
TypestringToNum(conststring&str)
{
istringstreamiss(str);
Typenum;
iss>>num;
returnnum;
}

#endif

#ifndef_MAP_HPP_
#define_MAP_HPP_
#include<vector>
#include<math.h>
usingnamespacestd;
classMapPoint
{
public:
doublelongitude;//经度
doublelatitude;//纬度
MapPoint(){}
MapPoint(doublex,doubley){longitude=x;latitude=y;}
};
classMap
{
public:
intmapsize;
vector<MapPoint>points;//多边形的顶点序列
Map(){}
Map(inti){mapsize=i;}
};

//unsignedintcount,num;
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%translatefromorigin
classPolygon
{
public:
vector<MapPoint>points;//多边形的顶点序列
doublearea(void){
doubleA=0;unsignedintN=points.size();
for(inti=0;i<(N-1);i++){
A+=fabs(points[i].longitude*points[i+1].latitude-points[i].latitude*points[i+1].longitude);
}
A+=fabs(points[N-1].longitude*points[0].latitude-points[N-1].latitude*points[0].longitude);
returnA/2;
}
doublenorth(void){
doubleN=points[0].latitude;
for(inti=0;i<points.size();i++){if(points[i].latitude>=N)N=points[i].latitude;}
returnN;
}
doublesouth(void){
doubleS=points[0].latitude;
for(inti=0;i<points.size();i++){if(points[i].latitude<=S)S=points[i].latitude;}
returnS;
}
doubleeast(void){
doubleE=points[0].longitude;
for(inti=0;i<points.size();i++){if(points[i].longitude>=E)E=points[i].longitude;}
returnE;
}
doublewest(void){
doubleW=points[0].longitude;
for(inti=0;i<points.size();i++){if(points[i].longitude<=W)W=points[i].longitude;}
returnW;
}
};
vector<Polygon*>polys;//多边形集合
vector<Polygon*>ReadMapData(conststringfilename)
{
intPointCount;
vector<Polygon*>polygons;
ifstreamfs(filename.c_str());
while(fs.eof()!=true)
{
Polygon*poly=newPolygon;
fs>>PointCount;
//cout<<PointCount<<endl;
for(inti=0;i<PointCount;i++)
{
MapPointp;
fs>>p.longitude>>p.latitude;
poly->points.push_back(p);
}
polygons.push_back(poly);

}
returnpolygons;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

MapReadData2num(conststringstr)//逐行读取并转化为常用数据类型bymememagic
{
cout<<"startreadmap"<<endl;
ifstreamfin(str.c_str());
if(!fin.is_open())
{cout<<"Erroropeningfile";exit(1);}
strings;MapImap;
intSize=0,i=0;boolflag;
while(getline(fin,s))
{
if(i==Size){ints_i=stringToNum<int>(s);Size=s_i+1;i=0;//count+=s_i;num++;
//cout<<"(vertexnum):"<<s_i<<endl;
}
else
{
istringstreamis(s);//采用istringstream从string对象str中读取字符
strings1;doublex,y;
while(is>>s1){
doubles_d=stringToNum<double>(s1);
if(!flag){x=s_d;flag=!flag;}
else{y=s_d;flag=!flag;}
//cout<<s_d<<'';
}
//cout<<"x="<<x<<''<<"y="<<y<<endl;
MapPointp(x,y);
Imap.points.push_back(p);
}
i++;
}
returnImap;
}

#endif