├── bresenham's circle program in c.C
└── README.md


/bresenham's circle program in c.C:
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 1 | // Author : youtube channel-dotnetmob
 2 | // Date : 23-May-2015
 3 | // Description : program for drawing circle using 
 4 | //bresenham's mid point circle algorithm
 5 | 
 6 | #include<stdio.h>
 7 | #include<graphics.h>
 8 | 
 9 | void circleplotpt(int x,int y,int x1,int y1)
10 | {
11 | 	//change 3rd parameter ie.15 to any other valid color number
12 | 	//like 2 for green
13 | 	putpixel(x+x1,y+y1,15);
14 | 	putpixel(x-x1,y+y1,15);
15 | 	putpixel(x+x1,y-y1,15);
16 | 	putpixel(x-x1,y-y1,15);
17 | 	putpixel(x+y1,y+x1,15);
18 | 	putpixel(x-y1,y+x1,15);
19 | 	putpixel(x+y1,y-x1,15);
20 | 	putpixel(x-y1,y-x1,15);
21 | }
22 | 
23 | void circlemidpt(int x,int y,int r)
24 | {
25 | 	int x1=0,y1=r,p=1-r;
26 | 	circleplotpt(x,y,x1,y1);
27 | 	while(x1<y1)
28 | 	{
29 | 		x1++;
30 | 		if(p<0)
31 | 			p+=2*x1+1;
32 | 		else
33 | 		{
34 | 			y1--;
35 | 			p+=2*(x1-y1)+1;
36 | 		}
37 | 		circleplotpt(x,y,x1,y1);
38 | 	}
39 | }
40 | 
41 | 
42 | void main()
43 | {
44 | 	int xc,yc,x,gd=DETECT,gm,r;
45 | 	do
46 | 	{
47 | 	//change below directory according to your bgi directory
48 | 	initgraph(&gd,&gm,"C:\\TurboC3\\BGI");
49 | 
50 | 	printf("\nEnter cirdcle centre cordinates : ");
51 | 	scanf("%d%d",&xc,&yc);
52 | 	printf("\nEnter the circle radius: ");
53 | 	scanf("%d",&r);
54 | 
55 | 	clrscr();
56 | 	cleardevice();
57 | 
58 | 	circlemidpt(xc,yc,r);
59 | 	delay(2000);
60 | 
61 | 	printf("Enter 'y' for try again");
62 | 	}while(getch()=='y');
63 | }


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/README.md:
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 1 | # Bresenham's Circle Program in C
 2 | Program shows how you can draw a circle in c programming.
 3 | 
 4 | ## Get the Code
 5 | 
 6 | ```
 7 | $ git clone https://github.com/CodAffection/Bresenham-s-Circle-Program-in-C.git
 8 | //update BGI Directory
 9 | ```
10 | 
11 |  ## How it works ?
12 |  
13 |  :tv: Video tutorial on this same topic  
14 |  Url : https://youtu.be/ImlhkHCHFMA
15 |  
16 | <a href="http://www.youtube.com/watch?feature=player_embedded&v=ImlhkHCHFMA
17 | " target="_blank"><img src="http://img.youtube.com/vi/ImlhkHCHFMA/0.jpg" 
18 | alt="Demo for Bresenham's Circle Program in C" width="500" height="400" border="10" /></a>
19 | 
20 | 
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