DDA program

                           DDA Line Drawing program in c

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<math.h>
void main()
{
//variable declaration
int dx,dy,length,x1,y1,x2,y2,k,p,q;
float x,y,m;
float stepx,stepy;
//to autodetect the graphic drivers and mode
// set gd=DETECT,DETECT is a macro declared in graphics.h
int gd=DETECT,gm;
//call the pre-defined method initgraph with the address of gd nd gm


//input
printf("Enter the x co-ordinate of start pt\t");
scanf("%d",&x1);
printf("Enter the y co-ordinate of start pt\t");
scanf("%d",&y1);
printf("Enter the x co-ordinate of end pt\t");
scanf("%d",&x2);
printf("Enter the y co-ordinate of end pt\t");
scanf("%d",&y2);
//diff. in x co-ordinate
dx=(x2-x1);
//diff. in y-co-ordinate
dy=(y2-y1);
if(dx>=dy)
length=dx;
else
length=dy;
stepx=(float)dx/length;
printf("%f",stepx);
stepy=(float)dy/length;
printf("%f",stepy);
x=x1;
y=y1;
getch();
initgraph(&gd,&gm,"c:\\TC\\BGI");
//setviewport(getmaxx()/2,getmaxy()/2,getmaxx(),getmaxy(),100);
//for loop to print the line
// with every iteration x increases 1 and y by the slope
cleardevice();
p=getmaxx();
q=getmaxy();
line(p/2,0,p/2,q);
line(0,q/2,p,q/2);
for(k=1;k<=length;k++)
{
//use the putpixel method of graphics.h
delay(50);
  putpixel((p/2)+x,(q/2)-y,25);
x=x+stepx;
y=y+stepy;

}
getch();
//close the graph and come back to the text mode
closegraph();
}

Direct source code:-Download

                                     output

NOTE:-Since i did not find a complete dda program anywhere on the web,which works fine with negative values as well as with other quadrants,so this is what i have tried to achieve those requirements.If their is anything wrong in this program please let me know,i will surely try to correct them.

Your feedback is valuable for me

Penulis : vivek nayyar ~ Sebuah blog yang menyediakan berbagai macam informasi

Artikel DDA program ini dipublish oleh vivek nayyar pada hari Thursday 18 October 2012. Semoga artikel ini dapat bermanfaat.Terimakasih atas kunjungan Anda silahkan tinggalkan komentar.sudah ada 0 komentar: di postingan DDA program