Circle Triangle Pattern

 

Group A  

Practical 3 a  

Problem Statement : a) Write C++ program to draw the following pattern. Use DDA line and Bresenham‘s circle drawing algorithm. Apply the concept of encapsulation.

Check Out Code Here 👇

	#include <iostream.h>
	#include <stdlib.h>
	#include <graphics.h>
	#include<math.h>
	#include<dos.h>
	#include<conio.h>
	class Line
	{
	public:
	void dda(int x1,int y1,int x2,int y2)
	{
	float x,y,dx,dy,length,xincr,yincr;
	int i;
	dx = abs(x2-x1);
	dy = abs(y2-y1);
	if(dx>dy)
	{length = dx;}
	else
	{length = dy;}
	xincr= (x2-x1)/(float)length;
	yincr= (y2-y1)/(float)length;
	x = x1 + 0.5;
	y = y1 + 0.5;
	for(i=1;i<=length;i++)
	{
	putpixel(x,y,12);
	x = x + xincr;
	y = y + yincr;
	}
	putpixel(x,y,12);
	} //end of DDA function
	}; //end of clas Line
	class Circle
	{
	public:
	void drawcircle(float x1,float y1,int r)
	{
	float x,y,d;
	d = 3 - (2 * r);
	x=0;
	y=r;
	while(x<=y)
	{
	plot(x,y,x1,y1);
	if(d<0)
	{
	x=x+1;
	d = d + (4 * x) + 6;
	}
	else
	{
	x=x+1;
	y=y-1;
	d = d + (4 * (x - y)) + 10;
	}
	}
	}
	void plot(int x,int y,int x1,int y1)
	{
	putpixel(x+x1,y+y1,12);
	putpixel(y+x1,x+y1,12);
	putpixel(-x+x1,y+y1,12);
	putpixel(y+x1,-x+y1,12);
	putpixel(x+x1,-y+y1,12);
	putpixel(-y+x1,x+y1,12);
	putpixel(-x+x1,-y+y1,12);
	putpixel(-y+x1,-x+y1,12);
	}
	};
	int main()
	{
	Circle c;
	int gd=DETECT,gm;
	int x,y,r1,r2,x1,y1,x2,y2,x3,y3;
	initgraph(&gd,&gm,"c:\\turboc3\\bgi");
	cout<<"Enter centre coordinate (x,y) of circle ";
	cin>>x>>y;
	cout<<"Enter radius of outer circle ";
	cin>>r1;
	cout<<"Enter radius of inner circle ";
	cin>>r2;
	c.drawcircle(x,y,r1);
	c.drawcircle(x,y,r2);
	float length;
	length=sqrt((r1*r1)-(r2*r2));
	x1=x;
	y1=y-r1;
	x2=x-length;
	y2=y+r2;
	x3=x+length;
	y3=y+r2;
	Line obj;
	obj.dda(x1,y1,x2,y2);delay(500);
	obj.dda(x1,y1,x3,y3);delay(500);
	obj.dda(x2,y2,x3,y3);
	getch();
	closegraph();
	system("clear");
	return 0;
	}

view raw circle-triangle-pattern hosted with ❤ by GitHub

Output : 

Code can get updated so also come back later to see if there is any changes. Also if there is any problem with code you can comment below. If you like it, do share with your friends.😊