cg lab file

7/29/2019 cg lab file

1/22

AIM: Write a program to get the graphics mode and its name,

and driver name.

Program:

#include#include

#include

void main()

{

clrscr();

int gm,gd=DETECT;

int mode;

char *name, *driver;initgraph(&gd,&gm,"");

mode=getgraphmode();

name=getmodename(mode);

driver=getdrivername();

cout


2/22

Program:

#include

#include

#includevoid main()

{

clrscr();

int gm,gd=DETECT;

int mode;

char *name;

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

mode=getgraphmode();

name=getmodename(mode);cout


3/22

Program:

#include

#include

#include#include

#include

void main()

{

clrscr();

int gm,gd=DETECT;


setbkcolor(12);

outtextxy(150,200,"\n Press any key to see the colorful lines");getch();

delay(100);

setbkcolor(4);

while(!kbhit())

{

setcolor(random(MAXCOLORS));

line(320,240,random(640),random(480));

}

closegraph();}

AIM: Write a program to display colorful circles.

C o m p u t e r G r a p h i c sPage 16


4/22

Program:

#include

#include

#include#include

#include

void main()

{

clrscr();

int gm,gd=DETECT;


setbkcolor(12);

outtextxy(150,200,"\n Press any key to see the colorful circles");getch();

delay(100);

setbkcolor(15);

while(!kbhit())

{

setcolor(random(MAXCOLORS));

circle(320,240,random(200));

}

closegraph();

}

AIM: Write a program to draw different shapes as line, rectangle,



5/22

bar, 3d bar.

Program:

#include

#include#include

void main()

{

clrscr();

int gm,gd=DETECT;


outtextxy(30,40,"Line");

moveto(50,50);

linerel(200,100);outtextxy(400,40,"Rectangle");

rectangle(350,50,550,150);

outtextxy(130,300,"Bar");

bar(100,310,250,350);

outtextxy(430,250,"3D Bar");

bar3d(410,280,480,400,20,1);

getch();

closegraph();

}

AIM: Write a program to draw different shapes as circle and ellipse.



6/22

Program:

#include

#include

#include

void main(){ clrscr();

int gm,gd=DETECT;

int x,y,r,xr,yr;


coutx;

couty;

coutr;

circle(x,y,r);

coutx>>y;

coutxr>>yr;

ellipse(x,y,0,360,xr,yr);

getch();

closegraph();}

AIM: Write a program to design the PACMAN.



7/22

Program:

#include

#include

#include

void main(){

clrscr();

int gm,gd=DETECT;


int polyarray[]={10,190,100,300,250,300,400,250,325,225,325,175,

300,200,270,190,265,165,250,180,200,150,250,130,265,150,270,125,

295,115,325,135,325,100,400,50,200,50,100,100,10,190};

drawpoly(21,polyarray);

outtextxy(120,190,"PACAMAN");setfillstyle(SOLID_FILL,4);

floodfill(125,265,15);

circle(220,80,15);

setfillstyle(SOLID_FILL,0);

floodfill(225,85,15);

getch();

closegraph();

}

AIM: Write a program to draw a line by DDA method.



8/22

Program:

#include

#include

#include

#include#define Round(a) (int(a+0.5))

void main()

{

clrscr();

int gd=DETECT,gm,x1,y1,x2,y2,steps,dx,dy;

float xinc,yinc,x,y;initgraph(&gd,&gm,"");

coutx1>>y1;

coutx2>>y2;

dx=x2-x1;

dy=y2-y1;

x=x1; y=y1;

if (abs(dx)>abs(dy))

steps=abs(dx);

else

steps=abs(dy);

xinc=dx/float(steps);

yinc=dy/float(steps);

putpixel(Round(x),Round(y),WHITE);

for (int k=0;k


9/22

}

getch();

closegraph();

}

AIM: Write a program to draw a line by Bresenham method.



10/22

Program:

#include

#include

#include

void main()

{

clrscr();

int gd=DETECT,gm,x1,y1,x2,y2,dx,dy,pk,steps,x,y;


coutx1>>y1;

coutx2>>y2;

dx=x2-x1;

dy=y2-y1;

x=x1; y=y1;

steps=dx;

pk=(2*dy)-dx;

for(int k=0;k


11/22

}

}

getch();

closegraph();

}

AIM: Write a program to draw a circle by Bresenham method.



12/22

Program:

#include

#include

#include

void main()

{

clrscr();

int gd=DETECT,gm;


int x,y,p,r,xc,yc;

coutxc>>yc;

coutr;

x=0;

y=r;

p=1-r;

while(x


13/22

putpixel(xc+y,yc-x,15);

putpixel(xc-y,yc-x,15);

}

getch();

closegraph();

}

AIM: Write a program to draw a circle by Bresenham method.



14/22

Program:

#include

#include

#include

#include

void disp();

float x,y;

int xc,yc;

void main()

{

clrscr();

int gd=DETECT,gm;int a,b;

float p1,p2;


coutxc>>yc;

couta>>b;

x=0;y=b;

p1=(b*b)-(a*a*b)+(a*a)/4;

while((2.0*b*b*x)


15/22

disp();

}

x=-x;

disp();

x=-x;

}

x=a;

y=0;

disp();

p2=(b*b)-(a*a*b)+(a*a)/4;

while((2.0*b*b*x)>=(2.0*a*a*y))

{

y++;if(p2>0)

{

p2=p2+(a*a)-(2.0*a*a*y);

disp();

}

else

{

x--;

p2=p2+(2.0*b*b*x)-(2.0*a*a*y)+(a*a);disp();

}

y=-y;

disp();

y=-y;

}

getch();

closegraph();

}

void disp()



16/22

{

putpixel(xc+x,yc+y,15);

putpixel(xc-x,yc+y,15);

putpixel(xc+x,yc-y,15);

putpixel(xc+x,yc-y,15);

}

AIM: Write a program for translation of 2D objects.



17/22

Program:

#include

#include

#include

void main()

{

clrscr();

int gm,gd=DETECT;

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

int left,top,right,bottom,tx,ty;

int x=getmaxx()/2, y=getmaxy()/2;coutleft>>top;

cout>right>>bottom;

cleardevice();

line(0,y,2*x,y);

line(x,0,x,2*y);

rectangle(x+left,y-top,x+right,y-bottom);

gotoxy(1,1);

couttx>>ty;

cleardevice();

line(0,y,2*x,y);line(x,0,x,2*y);

gotoxy(1,1);

cout


18/22

closegraph();

}

AIM: Write a program for scaling of 2D objects.



19/22

Program:

#include

#include

#include

void main()

{

clrscr();

int gm,gd=DETECT;


int left,top,right,bottom,s1,s2;

int x=getmaxx()/2,y=getmaxy()/2;

coutleft>>top;

cout>right>>bottom;

cleardevice();

line(0,y,2*x,y);

line(x,0,x,2*y);

rectangle(x+left,y-top,x+right,y-bottom);

gotoxy(1,1);

couts1>>s2;

cleardevice();

line(0,y,2*x,y);

line(x,0,x,2*y);int scl=((right-left)*s1)/4,sct=((top-bottom)*s2)/4;

gotoxy(1,1);

cout


20/22

closegraph();

}

AIM: Write a program for mirror reflection of 2D objects.



21/22

Program:

#include

#include

#include

void main()

{

clrscr();

int gm,gd=DETECT;


int left,top,right,bottom;

char p;

int x=getmaxx()/2,y=getmaxy()/2;coutleft>>top;

cout>right>>bottom;

cleardevice();

line(0,y,2*x,y);

line(x,0,x,2*y);rectangle(x+left,y-top,x+right,y-bottom);

gotoxy(1,1);

coutp;

cleardevice();

line(0,y,2*x,y);

line(x,0,x,2*y);

gotoxy(1,1);

cout


22/22

}

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