NAME : ANKIT BHATT
COURSE : BCA SEM-6TH SEC : C
ROLL NO :2121093(01)
SUBJECT : Computer Graphics
PROBLEM STATEMENT: Write a program to draw a line using Bresenham’s line
generation algorithm.
OBJECTIVE: This lab exercise implements the line drawing algorithm using decision
parameter and pixel values.
SOURCE CODE :
#include<stdio.h>
#include<graphics.h>
int main( )
{
int gd=DETECT, gm, x0, y0, x1, y1, dx, dy, p, x,
y; printf("Co-ordinates of first point: "); printf("\
nEnter the value of x1: "); scanf("%d",&x0);
printf("Enter the value of y1:
"); scanf("%d",&y0);
printf("Co-ordinates of second point: "); printf("\
nEnter the value of x2: "); scanf("%d",&x1);
printf("Enter the value of y2:
"); scanf("%d",&y1);
initgraph(&gd,&gm,"")
; dx=x1-x0;
dy=y1-y0;
x=x0;
y=y0;
p=2*dy-
dx;
while(x<x1)
{
if(p>=0)
{
putpixel(x,y,15);
y=y+1;
p=p+2*dy-2*dx;
}
else
{
putpixel(x,y,4);
p=p+2*dy;
}
x=x+1;
}
getch();
closegraph();
return 0;
}
OUTPUT :
NAME : ANKIT BHATT
COURSE : BCA SEM-6TH SEC : C
ROLL NO :2121093 (01)
SUBJECT : Computer Graphics
PROBLEM STATEMENT: Write a program to draw a Circle using Mid-point Circle
generation Algorithm.
OBJECTIVE: The lab assignment objective is to implement Mid-point Circle generation
algorithm which plots the circle using eight segment approach.
SOURCE CODE :
#include<stdio.h>
#include<graphics.h>
void drawcircle(int x0, int y0, int radius)
{
int x =
radius; int y
= 0;
int err = 0;
while (x >= y)
{
putpixel(x0 + x, y0 + y, 7);
putpixel(x0 + y, y0 + x, 7);
putpixel(x0 - y, y0 + x, 7);
putpixel(x0 - x, y0 + y, 7);
putpixel(x0 - x, y0 - y, 7);
putpixel(x0 - y, y0 - x, 7);
putpixel(x0 + y, y0 - x, 7);
putpixel(x0 + x, y0 - y, 7);
if (err <= 0)
y += 1;
err += 2*y + 1;
if (err > 0)
x -= 1;
err -= 2*x + 1; }
}
int main( ){
int gdriver=DETECT, gmode, error, x, y, r; printf("Enter radius of circle: "); scanf("%d", &r);
printf("Enter co-ordinates of center(x and y): ");
scanf("%d%d", &x, &y);
initgraph(&gdriver, &gmode,
""); drawcircle(x, y, r);
delay(9999999);
return 0;}
OUTPUT :
NAME : ANKIT BHATT
COURSE : BCA SEM-6TH SEC : C
ROLL NO :2121093 (01)
SUBJECT : Computer Graphics
PROBLEM STATEMENT: Write a program to draw a Circle using Bresenham’s Circle
algorithm.
OBJECTIVE: The lab assignment objective is to implement Bresenham’s Circle generation
algorithm which plots the circle using eight segment approach.
SOURCE CODE :
#include<stdio.h>
#include<graphics.h>
int main(){
int gd=DETECT,gm;
int r,x,y,p,xc=320,yc=240;
printf("Enter the radius
"); scanf("%d",&r);
initgraph(&gd,&gm,"");
x=0;
y=r;
putpixel(xc+x,yc-
y,1); p=3-(2*r);
for(x=0;x<=y;x++){
if
(p<0)
y=y;
p=(p+(4*x)+6);
else
y=y-
1;
p=p+((4*(x-y)+10));
putpixel(xc+x,yc-y,1);
putpixel(xc-x,yc-y,2);
putpixel(xc+x,yc+y,3)
; putpixel(xc-
x,yc+y,4);
putpixel(xc+y,yc-x,5);
putpixel(xc-y,yc-x,6);
putpixel(xc+y,yc+x,7)
; putpixel(xc-
y,yc+x,8);
}
getch();
closegraph();
}
OUTPUT :
NAME : ANKIT BHATT
COURSE : BCA SEM-6TH SEC: C
ROLL NO :2121093(01)
SUBJECT : Computer Graphics
PROBLEM STATEMENT : Write a program to draw Smiley.
OBJECTIVE: To give a understanding to students of pixel positions and drawing figures using
basic graphics objects.
SOURCE CODE :
#include <stdio.h>
#include
<graphics.h> int
main( )
{
int gd=DETECT,gm;
initgraph(&gd,&gm," ");
circle(300,200,100);
setfillstyle(SOLID_FILL,YELLOW);
floodfill(299,210,15);
circle(260,158,15);
setfillstyle(SOLID_FILL,BLUE);
floodfill(259,159,15);
circle(340,158,15);
setfillstyle(SOLID_FILL,BLUE);
floodfill(341,159,15);
ellipse(300,220,180,0,50,50);
delay(99999);
closegraph( );
}
OUTPUT :
NAME : ANKIT BHATT
COURSE : BCA SEM-6TH SEC : C
ROLL NO :2121093(01)
SUBJECT : Computer Graphics
PROBLEM STATEMENT : Write a program to Zoom-in and zoom-out a circle.
OBJECTIVE: To give a understanding to students of pixel positions and drawing figures
using basic graphics objects.
SOURCE CODE :
#include<stdio.h>
#include<graphics.h>
int main( )
{
int gd=DETECT,gm,rad=0,n=10;
printf("Enter radius : ");
scanf("%d",&rad);
initgraph(&gd,&gm,"
"); while(n)
{
setcolor(15);
circle(200,200,rad);
delay(1000); if(rad
%2 == 0)
rad = rad-
30; else
rad = rad+49;
cleardevice();
n--;
}
}
OUTPUT :
