C Program to Draw Fern Leaf using Fractals - Computer Graphics Experiment

Fern is a plant with leaves that follow a pattern. A whole fern plant can be drawn using simply lines. Drawing fern is a simple example for fractals in computer graphics. The following program draws a fern plant using the idea of fractals. This is a computer graphics lab experiment.

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


int a;

void drawfern(int x,int y,int l,int arg,int n)
{

int x1,y1,i;
int l1,xpt,ypt;

if(n>0&&!kbhit())
 {
 x1=(int)(x-l*sin(arg*3.14/180));
 y1=(int)(y-l*cos(arg*3.14/180));
 line(x,y,x1,y1);
 l1=(int)(l/5);
 for(i=1;i<6;i++)
  {
  xpt=(int)(x-i*l1*sin(arg*3.14/180));
  ypt=(int)(y-i*l1*cos(arg*3.14/180));
  drawfern(xpt,ypt,(int)(l/(i+1)),arg+a,n-1);
  drawfern(xpt,ypt,(int)(l/(i+1)),arg-a,n-1);
  }
 }
}



void main()
{
int gd=DETECT,gm,x,y,l;

initgraph(&gd,&gm,"C:\\TURBOC3\\BGI\\");
x=getmaxx()/2;
y=getmaxy()/2;
l=150;
a=45;
setcolor(YELLOW);
drawfern(x,y,l,0,5);
getch();
}