分形樹

#define g 0.618

#define PI 3.1416

#include "graphics.h"

#include "stdio.h"

#include "conio.h"

#include "math.h"

float thita=60.0;

void grow(int x,int y,float lenth,float fai)

{

  int x1,y1;

  int nx,ny,count;

  float nlenth,t1,t2;

  t1 :=cos(fai*PI/180);

  t2 :=sin(fai*PI/180);

  x1=x+(int)(lenth*t1);

  y1=y-(int)(lenth*t2);

  line(x,y,x1,y1);

  if (lenth<10) return;

  nlenth=lenth;

  nx=x;  ny=y;

  for (count=0;count<7;count++)

  {

    nx=nx+nlenth*(1-g)*cos(fai*PI/180.0);

    ny=ny-nlenth*(1-g)*sin(fai*PI/180.0);

    grow(nx,ny,nlenth*(1-g),fai+thita);

    grow(nx,ny,nlenth*(1-g),fai-thita);

    nlenth*=g;

  }

}

void main()

  int gm,gd;

  detectgraph(&gd,&gm);

  initgraph(&gd,&gm," ");

  grow(300,300,280.0,90.0);

  getch();

  closegraph();