Thursday, August 16, 2012
DDA Line Drawing Algorithm Using C Programming
#include<stdio.h> #include<math.h> #include<conio.h> #include<graphics.h> #define round(val) (int)(val+0.5) void main() { int gd=DETECT,gm; void line_dda(int,int,int,int); int xa,xb,ya,yb; printf("Enter the two values"); scanf("%d%d%d%d",&xa,&ya,&xb,&yb); initgraph(&gd,&gm,""); cleardevice(); line_dda(xa,ya,xb,yb); getch(); closegraph(); } void line_dda(int xa,int ya,int xb,int yb) { int Dx=xb-xa,Dy=yb-ya,steps,k; float xin,yin,X=xa,Y=ya; if(abs(Dx)>abs(Dy)) steps=abs(Dx); else steps=abs(Dy); xin=Dx/(float)steps; yin=Dy/(float)steps; putpixel(round(X),round(Y),6); for(k=0;k<steps;k++) { X=X+xin; Y=Y+yin; putpixel(round(X),round(Y),6); } }
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