MIDPOINT ELIIPSE DRAWING ALGORITHM - Games and Graphics Source Code in C

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Home » C Home » Games and Graphics Home » MIDPOINT ELIIPSE DRAWING ALGORITHM

A D V E R T I S E M E N T

Title	MIDPOINT ELIIPSE DRAWING ALGORITHM
Author	RANJEET RAMUNNI
Author Email	ranjeetramunni [at] gmail.com
Description	THIS IS THE CODE FOR THE RASTER MIDPOINT ELLIPSE DRAWING ALGORITHM
Category	C » Games and Graphics
Hits	395389
Code	Select and Copy the Code
#include<stdio.h> #include<graphics.h> #include<conio.h> void putelpix(float xc,float yc,float x,float y) { putpixel((int)(xc+x),(int)(yc+y),15); putpixel((int)(xc-x),(int)(yc-y),15); putpixel((int)(xc+x),(int)(yc-y),15); putpixel((int)(xc-x),(int)(yc+y),15); } void mdpt(float xc,float yc,float rx,float ry) { float x=0,y=ry,p1,p2,t1,t2; int k; p1=ryry-rxrxry+0.25rxrx; putelpix(xc,yc,x,y); for(k=0;(2ryryx)<=(2rxrxy);k++) { t1=2ryryx+2ryry; t2=2rxrxy-2rxrx; if(p1<0) p1=p1+t1+ryry; else { p1=p1+t1-t2+ryry; y--; } x++; putelpix(xc,yc,x,y); } p2=ryry(x+.5)(x+.5)+rxrx(y-1)(y-1)-rxrxryry; putelpix(xc,yc,x,y); for(k=0;y>=0;k++) { t1=2ryryx+2ryry; t2=2rxrxy-2rxrx; if(p2>0) p2=p2-t2+rxrx; else { p2=p2+t1-t2+rxrx; x++; } y--; putelpix(xc,yc,x,y); } } void main() { int gd=DETECT,gm; float xc,yc,rx,ry; initgraph(&gd,&gm,""); printf("Enter center coordinates x,y and rx,ry "); scanf("%f%f%f%f",&xc,&yc,&rx,&ry); mdpt(xc,yc,rx,ry); getch(); closegraph(); }

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