Computer Graphics(160703) - · PDF fileComputer Graphics(160703) Name ... 4 Write a program...

VENUS INTERNATIONAL COLLEGE OF TECHNOLOGY Gandhinagar

Department of Computer Enggineering

Computer Graphics(160703)

Name :

Enroll no.

:

Class

: 6th SEM C.E.

Year

: 2014-15

VENUS INTERNATIONAL COLLEGE OF TECHNOLOGY

Gandhinagar

CERTIFICATE

This is certify that

Mr./Ms.________________________________Roll No. ___________________ of B.E Third Year 6th Sem C.E. has satisfactory completed the course in Computer Graphics.

_______________________ ____________________ Signature of Faculty Signature of HOD

DATE OF SUBMISSION : / / 2015

Index

Sr. No. Description Page No.

Date Sign

1 Write a program for Smiley. 1 / /15 2 Write a program for DDA Line drawing algorithm . 2 / /15 3

Write a program for Bresenham's Line Drawing

Algorithm. 4 / /15

4 Write a program for Midpoint Circle Algorithm. 6 / /15 5 Write a program for Midpoint ellipse Algorithm. 8 / /15 6 Write a program for 2D Translation Triangle Program. 10 / /15 7 Write a program for 2D Rotation of Triangle Program. 12 / /15 8 Write a program for 2D Scaling Triangle Program. 14 / /15 9 Write a program for Character generation. 16 / /15

10 Write a program for draw a moving person. 17 / /15 11 Project - I 19 / /15

Computer Graphics VICT CE 2014-15 1

Practical – 1

AIM : Write a program for Smiley.

Program :

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

void main()

{

int gd=DETECT, gm;

initgraph(&gd, &gm, "C:\\TC\\BGI");

clrscr();

printf("Smiley");

circle(320,240,200);

circle(250,180,28);

circle(400,180,28);

arc(320,250,180,0,120);

line(300,280,350,280);

getch();

}

Output :


Practical – 2

AIM : Write a program for DDA Line drawing algorithm .

Program :

#include<stdio.h>

#include<math.h>

#include<conio.h>


#define round(val) (int)(val+0.5)

void main()

{

intgd=DETECT,gm;

voidline_dda(int,int,int,int);

intxa,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();

}

voidline_dda(intxa,intya,intxb,intyb)

{

intDx=xb-xa,Dy=yb-ya,steps,k;

floatxin,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);

}

}


OUTPUT:


Practical – 3

AIM : Write a program for Bresenham's Line Drawing Algorithm.

Program :

#include<stdio.h>

#include<math.h>

#include<conio.h>


void main()

{

int x1,x2,y1,y2;

intgd=DETECT,gm;

voidlinebres(int,int,int,int);

printf("Enter the two end points:");

scanf("%d%d%d%d",&x1,&x2,&y1,&y2);

initgraph(&gd,&gm,"");

cleardevice();

linebres(x1,y1,x2,y2);

getch();

line(x1,y1,x2,y2);

getch();

closegraph();

}

voidlinebres(int x1,int y1,int x2,int y2)

{

int dx=abs(x1-x2),dy=abs(y1-y2);

intp,x,y,i,xend,yend;

if(dx!=0)

{

p=2*dy-dx;

if(x1>x2)

{

x=x2;

y=y2;

xend=x1;

}

else

{

x=x1;

y=y1;

xend=x2;

}

putpixel(x,y,2);

for(i=x;i<xend;i++)

{

x+=1;


if(p<0)

p+=2*dy;

else

p+=2*(dy-dx);

}

putpixel(x,y,2);

}

else

{

p=2*dx-dy;

if(y1>y2)

{

x=x2;

y=y2;

yend=y2;

}

putpixel(x,y,2);

for(i=y;i<yend;i++)

{

y+=1;

if(p<0)

p+=2*dx;

else

{

x+=1;

p+=2*(dx-dy);

}

putpixel(x,y,2);

}

}

}

OUTPUT:


Practical – 4

AIM : Write a program for Midpoint Circle Algorithm.

Program :

#include<stdio.h>

#include<conio.h>


void main()

{

intgd=DETECT,gm;

intx,y,r;

voidDrawcircle(int,int,int);

printf("Enter the Mid points and Radious:");

scanf("%d%d%d",&x,&y,&r);

initgraph(&gd,&gm,"");

Drawcircle(x,y,r);

getch();

closegraph();

}

voidDrawcircle(int x1,int y1,int r)

{

int x=0,y=r,p=1-r;

voidcliplot(int,int,int,int);

cliplot(x1,y1,x,y);

while(x<y)

{

x++;

if(p<0)

p+=2*x+1;

else

{

y--;

p+=2*(x-y)+1;

}

cliplot(x1,y1,x,y);

}

}


voidcliplot(intxctr,intyctr,intx,int y)

{

putpixel(xctr +x,yctr +y,1);

putpixel(xctr -x,yctr +y,1);

putpixel(xctr +x,yctr -y,1);

putpixel(xctr -x,yctr -y,1);

putpixel(xctr +y,yctr +x,1);

putpixel(xctr -y,yctr +x,1);

putpixel(xctr +y,yctr -x,1);

putpixel(xctr -y,yctr -x,1);

}

OUTPUT:


Practical – 5

AIM : Write a program for Midpoint ellipse Algorithm.

Program :

#include<stdio.h>


#include<math.h>

void main()

{

long d1,d2;

int i,gd,gm,x,y,x0,y0;

long rx,ry,rxsq,rysq,tworxsq,tworysq,dx,dy;

clrscr();

printf("Enter the X radius and Y radius of the ellipse:\n");

scanf("%ld%ld",&rx,&ry);

printf("\nEnter the center (x,y) of the ellipse:\n");

scanf("%d%d",&x0,&y0);

detectgraph(&gd,&gm);

initgraph(&gd,&gm,"d:\\tc\\BGI");

cleardevice();

rxsq=rx*rx;

rysq=ry*ry;

tworxsq=2*rxsq;

tworysq=2*rysq;

x=0;

y=ry;

d1=rysq-rxsq*ry+(0.25*rxsq);

dx=tworysq*x;

dy=tworxsq*y;

do

{

putpixel(x0+x,y0+y,15);

putpixel(x0-x,y0-y,15);

putpixel(x0+x,y0-y,15);

putpixel(x0-x,y0+y,15);

if(d1<0)

{

x=x+1;

y=y;

dx=dx+tworysq;

d1=d1+dx+rysq;

}


else

{

x=x+1;

y=y-1;

dx=dx+tworysq;

dy=dy-tworxsq;

d1=d1+dx-dy+rysq;

}

delay(10);

}

while(dx<dy);

d2=rysq*(x+0.5)*(x+0.5)+rxsq*(y-1)*(y-1)-(rxsq*rysq);

do

{

putpixel(x0+x,y0+y,15);

putpixel(x0-x,y0-y,15);

putpixel(x0+x,y0-y,15);

putpixel(x0-x,y0+y,15);

if(d2>0)

{

x=x;

y=y-1;

dy=dy-tworxsq;

d2=d2-dy+rxsq;

}

else

{

x=x+1;

y=y-1;

dx=dx+tworysq;

dy=dy-tworxsq;

d2=d2+dx-dy+rxsq;

}

}

while(y>0);

getch();

closegraph();

}

OUTPUT :


Practical – 6

AIM : Write a program for 2D Translation Triangle Program.

Program :

#include<stdio.h>

#include<conio.h>


#include<process.h>

#include<math.h>

int x1,y1,x2,y2,x3,y3,mx,my;

void draw();

void tri();

void main()

{

intgd=DETECT,gm;

int c;

initgraph(&gd,&gm,"d:\\tc\\bgi ");

printf("Enter the 1st point for the triangle:");


printf("Enter the 2nd point for the triangle:");


printf("Enter the 3rd point for the triangle:");


cleardevice();

draw();

getch();

tri();

getch();

}

void draw()

{

line(x1,y1,x2,y2);

line(x2,y2,x3,y3);

line(x3,y3,x1,y1);

}


void tri()

{

int x,y,a1,a2,a3,b1,b2,b3;

printf("Enter the Transaction coordinates");

scanf("%d%d",&x,&y);

cleardevice();

a1=x1+x;

b1=y1+y;

a2=x2+x;

b2=y2+y;

a3=x3+x;

b3=y3+y;

line(a1,b1,a2,b2);

line(a2,b2,a3,b3);

line(a3,b3,a1,b1);

}

OUTPUT :


Practical – 7

AIM : Write a program for 2D Rotation of Triangle Program.

Program :

#include<stdio.h>

#include<conio.h>


#include<math.h>

#include<stdlib.h>

void draw (int x1,int y1,int x2,int y2,int x3,int y3);

//int x1,y1,x,y,sx,i,j;

void main()

{

int x1,y1,x2,y2,x3,y3,x,y;

intgdriver=DETECT,gmode,errorcode;

initgraph(&gdriver,&gmode,"d:\\tc\\bgi");

printf("\n Enter line1 co ordinates");






line(x1,y1,x2,y2);

line(x2,y2,x3,y3);

line(x3,y3,x1,y1);

draw(x1,y1,x2,y2,x3,y3);

getch();

}

void draw(int x1,int y1,int x2,int y2,int x3,int y3)

{

int x,y,p,q,d,a1,b1 ,a2,b2,a3,b3;

float a;

printf("\n Enter the rotation angle");

scanf("%d",&d);

//rotation point

p=x2;

q=y2;

//convert degree to radian

a=((d*3.14)/180);

a1=p+(x1-p)*cos(a)-(y1-q)*sin(a);

b1=p+(y1-p)*sin(a)+(x1-q)*cos(a);





line(a1,b1,a2,b2);

line(a2,b2,a3,b3);

line(a3,b3,a1,b1);

}


OUTPUT:


Practical – 8

AIM : Write a program for 2D Scaling Triangle Program.

Program :

#include<stdio.h>

#include<conio.h>


#include<process.h>

#include<math.h>

int x1,y1,x2,y2,x3,y3,mx,my;

void draw();

void scale();

void main()

{

intgd=DETECT,gm;

int c;

initgraph(&gd,&gm," ");

printf("Enter the 1st point for the triangle:");


printf("Enter the 2nd point for the triangle:");


printf("Enter the 3rd point for the triangle:");


draw();

scale();

}

void draw()

{

line(x1,y1,x2,y2);

line(x2,y2,x3,y3);

line(x3,y3,x1,y1);

}

void scale()

{

int x,y,a1,a2,a3,b1,b2,b3;

intmx,my;

printf("Enter the scalling coordinates");


mx=(x1+x2+x3)/3;

my=(y1+y2+y3)/3;

cleardevice();

a1=mx+(x1-mx)*x;

b1=my+(y1-my)*y;

a2=mx+(x2-mx)*x;

b2=my+(y2-my)*y;


a3=mx+(x3-mx)*x;

b3=my+(y3-my)*y;

line(a1,b1,a2,b2);

line(a2,b2,a3,b3);

line(a3,b3,a1,b1);

draw();

getch();

}

OUTPUT:


Practical – 9

AIM : Write a program for Character generation.

Program :

#include<stdio.h>

#include<conio.h>


void main()

{

int

a[7][5]={{0,0,1,0,0},{0,1,0,1,0},{1,0,0,0,1},{1,0,0,0,1},{1,1,1,1,1},{1,0,0,0,1},{1,0,0,0,1}};

inti,j;

intgd=DETECT,gm;

initgraph(&gd,&gm,"d:\\tc\\bgi");

for(i=0;i<7;i++)

{

for(j=0;j<5;j++)

{

putpixel(200+j,200+i,5*a[i][j]);

}

}

getch();

closegraph();

}

OUTPUT:


Practical – 10

AIM : Write a program for draw a moving person.

Program :


#include<conio.h>

#include<stdio.h>

#include<DOS.h>

#include<stdlib.h>

#include<math.h>

void main()

{

int gd=DETECT,gm;

initgraph(&gd,&gm,"d:\\tc\\bgi");

int x,y,xm;

printf("enter x,y");


xm=getmaxx();

circle(x,y,50);

ellipse(x-25,y-15,0,360,3,2);

ellipse(x+25,y-15,0,360,3,2);

line(x,y-10,x,y+10);

arc(x,y+15,180,360,15);

line(x,y+50,x,y+130);

line(x,y+130,x-30,y+180);

line(x-30,y+180,x-50,y+170);

line(x,y+130,x+30,y+180);

line(x+30,y+180,x+50,y+170);

line(x,y+75,x+75,y+75);

line(x+75,y+75,x+170,y-10);

ellipse(x+170,y-50,0,360,28,40);

while(!kbhit())

{

if(x<=xm)

{

cleardevice();

x=x+20;

circle(x,y,50);

ellipse(x-25,y-15,0,360,3,2);

ellipse(x+25,y-15,0,360,3,2);


arc(x,y+15,180,360,15);

line(x,y+50,x,y+130);

line(x,y+130,x-30,y+180);

line(x-30,y+180,x-50,y+170);

line(x,y+130,x+30,y+180);

line(x+30,y+180,x+50,y+170);

line(x,y+75,x+75,y+75);


line(x+75,y+75,x+170,y-10);

ellipse(x+170,y-50,0,360,28,40);

delay(100);

}

else

{

do

{

cleardevice();

x=x-20;

circle(x,y,50);

ellipse(x-25,y-15,0,360,3,2);

ellipse(x+25,y-15,0,360,3,2);


arc(x,y+15,180,360,15);

line(x,y+50,x,y+130);

line(x,y+130,x-30,y+180);

line(x-30,y+180,x-50,y+170);

line(x,y+130,x+30,y+180);

line(x+30,y+180,x+50,y+170);

line(x,y+75,x+75,y+75);

line(x+75,y+75,x+170,y-10);

ellipse(x+170,y-50,0,360,28,40);

delay(100);

}while(x!=0);

}

}

getch();

closegraph();

}

OUTPUT :

Computer Graphics(160703) - · PDF fileComputer Graphics(160703) Name ... 4 Write a program...

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