#include <stdio.h>
#include <math.h>

#include "mygraph.h"
#include "point.h"
#include "Xroutines.h"

#  define M_PI              3.14159265358979323846

dc_draw_line ( line aline, environment * env) {
    DrawLine(aline.e1.x, aline.e1.y,aline.e2.x, aline.e2.y, env);
}

draw_circle(environment * env,int xc,int yc,int r) {

     int x, y;
     int p;

     y = r;
     p = 3-2*r;
     for(x=0;x<=y;x++) {
          SetPixel(env,xc+x,yc+y);
          SetPixel(env,xc-x,yc+y);
          SetPixel(env,xc+x,yc-y);
          SetPixel(env,xc-x,yc-y);
          SetPixel(env,xc+y,yc+x);
          SetPixel(env,xc-y,yc+x);
          SetPixel(env,xc+y,yc-x);
          SetPixel(env,xc-y,yc-x);

	  if (p < 0) {
	     p += 4*x+6;
	  } else {
	     p += 4*(x-y)+10;
	     y -= 1;
	  }
     }
}