Question

Write a Program To implement Fractal Genration (koch Curve)

Answer 1

Try below code in any editor (turbo c or onlinegdb etc ) the code is error free !

#include<stdio.h>
#include<graphics.h>
#include<stdlib.h>
#define SIN 0.86602540   // sin(60 degrees)


void koch(int x1, int y1, int x2, int y2, int m)
{
int xx, yy, x[5], y[5], lx, ly, offx = 50, offy = 300;

		lx = (x2-x1)/3;
		ly = (y2-y1)/3;
		x[0] = x1;       		// Store point p0
		y[0] = y1;
		x[4] = x2;                             	 // Store point p4
		y[4] = y2;
		x[1] = x[0] + lx;                   		  // Store point p1
		y[1] = y[0] + ly;
		x[3] = x[0] + 2*lx;                		 // Store point p3
		y[3] = y[0] + 2*ly;
		xx =  x[3] - x[1];                    	// Translate point p2 to origin
		yy =  y[3] - y[1];
		x[2] =  xx*(0.5) + yy*(SIN);    	// Perform rotation for point p3
		y[2] = - xx*(SIN) + yy*(0.5);
		x[2] = x[2] + x[1];                		  // Perform inverse translation
		y[2] = y[2] + y[1];
	if(m>0)
	{
		koch(x[0], y[0], x[1], y[1], m-1);	// Recursive call to Draw part1
		koch(x[1], y[1], x[2], y[2], m-1);	// Recursive call to Draw part2
		koch(x[2], y[2], x[3], y[3], m-1);	// Recursive call to Draw part3
		koch(x[3], y[3], x[4], y[4], m-1);	// Recursive call to Draw part4
	}
	else
	{
		line(offx + x[0], offy + y[0] , offx + x[1], offy + y[1]);
		line(offx + x[1], offy + y[1] , offx + x[2], offy + y[2]);
		line(offx + x[2], offy + y[2] , offx + x[3], offy + y[3]);
		line(offx + x[3], offy + y[3] , offx + x[4], offy + y[4]);

	}
}
void main()
{
int n, gd, gm;
int x1 = 0, x2 = 550, y1= 0, y2 = 0;
/* Initialise graphics mode
---------------------------------- */
printf("\n Enter the level of curve generation : ");
scanf("%d", &n);
detectgraph(&gd,&gm);
initgraph(&gd,&gm,"\\tc\\bgi");
koch(x1, y1, x2, y2, n);             // Draw Koch curve

getch();
closegraph();
}

output::