/*fractal de dragon 19/x/96*/
/*Fernando Galindo Soria*/

#include <graphics.h>
#include <math.h>
#include <conio.h>
#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include <dos.h>

void caracol(int,int,float,int);
int ang1,ang2,car,c1,c2,angbx;
void main()
{
  int gd=DETECT,gm;
  initgraph(&gd,&gm,"");

  randomize();
  while(car!=27){
    ang2=random(360);
    ang1=ang2+random(146)+17;
    gotoxy(1,1);printf("fractal de dragon ang1=%d ang2=%d",ang1,ang2);
    c1=random(15)+1;
    c2=random(16);
    setcolor(c1);
    caracol(290,140,60,91);
    if (kbhit())car=getch();
    else delay(2000);
    cleardevice();
  }

  closegraph();
}

void caracol(int x0,int y0,float l,int an)
{
  int x1,y1;
  if (!kbhit())
  if (l >=1 )
  {
    x1=x0+(l*cos(an/57.29578));
    y1=y0+(l*sin(an/57.29578));
    line(x0,y0,x1,y1);
    setcolor(c1); caracol(x1,y1,l-15,an+ang1);     //127, 117, 47
    setcolor(c2); caracol(x1,y1,l-1,an+ang2);     //12, 22
  }
}