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#include "stdafx.h"
#include <windows.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glaux.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

#define PI acos(-1.0)
#define Jiao (36.0/180*PI)
void init1(){
      glClearColor(0.0,0.0,0.0,1.0);
}
double x[110],y[110];
void Set(int x,int y,int c1,int c2,int c3){  
    glVertex2f(x,y);  
}  
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void drawB(){
 int x=-50,y=50;
 double r=50;
 int H0=5-4*r;
 int xi=x,yi=y;
 int pian=200;
 glBegin(GL_POINTS);
  Set(xi+pian,yi+pian,1,0,0);
  while(xi<=x+r){
   if(H0<0){
    H0+=8*xi+12;
   } else {
    H0+=8*(xi-yi)+20;
   }
   if(H0>0)yi--;
   xi++;
   Set(xi+pian,yi+pian,1,0,0);
   
  }
 glEnd();
}
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void CALLBACK drawA(){
 glClear(GL_COLOR_BUFFER_BIT);
    glColor3f(1,0,0); 
 drawB();
    double xi=100,yi=100,r=50,a=18.0/180*PI,zen=2*26.0/180*PI;
    double tmp=a;
    int i;
 int n=2*PI/zen+1;
    for(i=0;i<n;i++){
        x[i]=xi+r*cos(tmp);
        y[i]=yi+r*sin(tmp);
        tmp+=zen;
    }
    x[n]=x[0],y[n]=y[0];
    for(i=0;i<n;i++){
        glBegin(GL_LINES);
           glVertex2f(x[i],y[i]);
           glVertex2f(x[i+1],y[i+1]);
        glEnd();
    }
    glFlush();
}
int main(int argc, char* argv[]){
    auxInitDisplayMode(AUX_SINGLE|AUX_RGBA);
    auxInitPosition(100,100,500,500);
    auxInitWindow("CGOpenGL");
    init1();
    auxMainLoop(drawA);
    return 0;
}