Implement midpoint circle drawing algorithm
Write a C Program to implement midpoint circle drawing algorithm in Graphics. Here’s simple C Program to implement midpoint circle drawing algorithm in Graphics in C Programming Language.
Below is the source code for C Program to implement midpoint circle drawing algorithm in Graphics which is successfully compiled and run on Windows System to produce desired output as shown below :
SOURCE CODE : :
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/* C Program to implement midpoint circle drawing algorithm in Graphics */ #include <graphics.h> #include <conio.h> #include <math.h> #include <stdio.h> #define PI 3.14 float startangle,endangle; int x,y; int Can_draw( float theta ) { if( theta >= startangle && theta<= endangle ) return 1; return 0; } void Circlepoints(int x,int y,int xc,int yc) { float theta; theta = atan( (float)y/x ); theta = theta * (180/M_PI); if( Can_draw(theta)) putpixel(xc+x,yc-y,WHITE); if( Can_draw(360-theta)) putpixel(xc+x,yc+y,WHITE); if( Can_draw(90-theta)) putpixel(xc+y,yc-x,WHITE); if( Can_draw(270+theta)) putpixel(xc+y,yc+x,WHITE); if( Can_draw(180-theta)) putpixel(xc-x,yc-y,WHITE); if( Can_draw(180+theta)) putpixel(xc-x,yc+y,WHITE); if( Can_draw(90+theta)) putpixel(xc-y,yc-x,WHITE); if( Can_draw(270-theta)) putpixel(xc-y,yc+x,WHITE); } void MidPointcircle(int xc,int yc,int rad) { float d = (5/4.0) - rad; x=0,y=rad; while(y>x) { if(d<0) d += 2*x+3; else d+=(2*x)-(2*y)+5,y--; x++; Circlepoints(x,y,xc,yc); delay(90); } } void main() { int gd=DETECT,gm; int radius,xc,yc,choice,temp; float xstart,ystart,xend,yend; initgraph(&gd,&gm,"..\\bgi"); do { clrscr(); cleardevice(); printf("\n Enter your choice\n"); printf("\n 1.Draw a Circle\n 2.Draw a Sector\n 3.Draw an Arc\n 4.Exit\n"); scanf("%d",&choice); switch(choice) { case 1: printf("\n Enter the center:"); scanf("%d %d",&xc,&yc); printf("\n Enter the radius:"); scanf("%d",&radius); cleardevice(); startangle=0,endangle=360; MidPointcircle(xc,yc,radius); getch(); break; case 2: printf("\n Enter the center:"); scanf("%d %d",&xc,&yc); printf("\n Enter the radius:"); scanf("%d",&radius); printf("\n Enter the startangle:"); scanf("%f",&startangle); printf("\n Enter the endangle:"); scanf("%f",&endangle); cleardevice(); if(startangle>endangle) { temp=startangle; startangle=endangle; endangle=temp; } MidPointcircle(xc,yc,radius); xstart=xc+radius*cos(PI/180*startangle); ystart=yc-radius*sin(PI/180*startangle); xend=xc+radius*cos(PI/180*endangle); yend=yc-radius*sin(PI/180*endangle); line(xc,yc,xstart,ystart); line(xc,yc,xend,yend); getch(); break; case 3: printf("\n Enter the center:"); scanf("%d %d",&xc,&yc); printf("\n Enter the radius:"); scanf("%d",&radius); printf("\n Enter the startangle:"); scanf("%f",&startangle); printf("\n Enter the endangle:"); scanf("%f",&endangle); cleardevice(); if(startangle>endangle) { temp=startangle; startangle=endangle; endangle=temp; } MidPointcircle(xc,yc,radius); getch(); break; case 4: closegraph(); } }while(choice!=4); } |
Above is the source code for C Program to implement midpoint circle drawing algorithm in Graphics which is successfully compiled and run on Windows System.The Output of the program is shown above .
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