Cg Lab File Full Kantesh

7/31/2019 Cg Lab File Full Kantesh

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S. NO. CONTENTS SIGN

1 W.A.P to Print a Pixel

2 W.A.P to draw some basic shapes using graphics.h

3 W.A.P to implement Digital Differential Analyzer

4 W.A.P to implement Generalized Bresenhams Algorithm for scan-

converting a line

5 W.A.P to implement Bresenhams Algorithm for scan-converting a

circle

6 W.A.P to implement mid-point algorithm for scan-converting an

ellipse

7 W.A.P to implement mid-point algorithm for scan-converting a

circle

8 W.A P to implement Cohan Southerlans Algorithm for line clipping

9 W.A.P to input the co-ordinates of an object and scale it using

scaling factors.

10 W.A.P to input the co-ordinates of an object and translate it using

translation factors

11 W.A.P to input the co-ordinates of an object and perform scaling

about any point

12 W.A.P to input the co-ordinates of any object and rotate that

object about origin or about any point depending upon the user.

INDEX


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1. Program to Print a Pixel

#include

#include

main(){

int gd=DETECT, gm;

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

putpixel(25,25,RED);

getch();

closegraph();

return 0;

}

Output


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2. Program to draw some basic shapes using graphics.h.

#include

#include

main()

{

int gd=DETECT, gm;

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

int poly[12]={350,450, 350,410, 430,400, 350,350, 300,430, 350,450 };

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

circle(100,100,50);

outtextxy(75,170, "Circle");

rectangle(200,50,350,150);

outtextxy(240, 170, "Rectangle");

ellipse(500, 100,0,360, 100,50);

outtextxy(480, 170, "Ellipse");

line(100,250,540,250);

outtextxy(300,260,"Line");

sector(150, 400, 30, 300, 100,50);

outtextxy(120, 460, "Sector");

drawpoly(6, poly);

outtextxy(340, 460, "Polygon");

getch();

closegraph();

return 0;

}


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Output


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3. Program to implement Digital Differential Analyzer.

#include

#include

#include #include

int main()

{

int gd=DETECT,gm;

float xs,xe,ys,ye,x_inc,y_inc;

int x,y,length;

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

coutxs;

cout


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4) W.A.P to implement Generalized Bresenhams Algorithm for scan-converting aline.

#include

#include#include

#include

void main()

{

int gdriver=DETECT,gmode=0;

initgraph(&gdriver,&gmode,"C:\\TC\\BGI");

int x1,x2,y1,y2,x,y,dx,dy,sx,sy,steps,t,pk,flag;

coutx1>>y1>>x2>>y2;dx=abs(x2-x1);

dy=abs(y2-y1);

if((x2-x1)>0)

sx=1;

else

sx=-1;

if((y2-y1)>0)

sy=1;

else

sy=-1;

pk=2*dy-dx;

x=x1;

y=y1;

putpixel(x,y,BLUE);

if(dy>dx)

{

steps=dy;

flag=1;

t=dx;

dx=dy;

dy=t;

}

else

{

steps=dx;

flag=0;

}


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pk=2*dy-dx;

for(int i=1;i0)

{if(flag==1)

x=x+sx;

else

y=y+sy;

pk=pk-2*dx;

}

if(flag==1)

y=y+sy;

elsex=x+sy;

pk=pk+2*dy;

putpixel(x,y,BLUE);

}

getch();

closegraph();

}


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OUTPUT:-


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5) W.A.P to implement Bresenhams Algorithm for scan-converting a circle.#include

#include

#include#include

int main()

{



int r;

cout


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OUTPUT:-


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6) W.A.P to implement mid-point algorithm for scan-converting an ellipse.

#include

#include

#include

#include

void main()

{

clrscr();



int a,b,x,y,p1,p2;

coutb;

x=0;

y=b;

putpixel(x+200,y+300, WHITE);

p1=(b*b)-(a*a*b)+((1/4)*(a*a));

while((2*b*b*x)


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{

x+=1;

y-=1;

p2=p2+(2*b*b*x)-(2*a*a*y)+(a*a);

}

putpixel(x+200,y+300, WHITE);

putpixel(-x+200,y+300, WHITE);

putpixel(x+200,-y+300, WHITE);

putpixel(-x+200,-y+300, WHITE);

}

getch();

}


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OUTPUT:-


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7) W.A.P to implement mid-point algorithm for scan-converting a circle.

#include

#include

#include

#include

int main()

{



int r;

cout


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OUTPUT:-


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Q8 W.A P to implement Cohan Southerlans Algorithm for line clipping.

#include

#include

#include

#include

int main()

{



int t,b,r,l;

float x1,y1,x2,y2,xi,yi,xp,yp;

int b1=0,b2=0,b3=0,b4=0,b5=0,b6=0,b7=0,b8=0;

coutb>>r>>t;

rectangle(l,b,r,t);couty1>>x2>>y2;

line(x1,y1,x2,y2);

cout


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b7=1;

else

b7=0;

if(x2


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xp=l;

yp=y2+m*(xp-x2);

}

if(b7==1)

{

xp=r;

yp=y2+m*(xp-x2);

}

if(b6==1)

{

yp=b;

xp=x2+(yp-y2)/m;

}

if(b5==1)

{

yp=t;xp=x2+(yp-y2)/m;

}

line(xi,yi,xp,yp);

}

getch();

closegraph();

return(0);

}

OUTPUT:-


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Q9 W.A.P to input the co-ordinates of an object and scale it using scaling factors.

#include

#include

#include#include

int main()

{



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

float sx,sy;

int i,j;

int q,w,e,r,t,y;

int m=0;

couty1>>x2>>y2>>x3>>y3;

int a[2][3];

float b[2][2];

int c[2][3];

a[0][0]=x1;

a[1][0]=y1;

a[0][1]=x2;

a[0][2]=x3;a[1][1]=y2;

a[1][2]=y3;

line(x1,y1,x2,y2);

line(x2,y2,x3,y3);

line(x3,y3,x1,y1);

for(i=0;i


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for(int l=0;l


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Q10 W.A.P to input the co-ordinates of an object and translate it using translation

factors.

#include#include

#include

#include

int main()

{




float tx,ty;

int i,j;

int q,w,e,r,t,y;

int m=0;

couty1>>x2>>y2>>x3>>y3;

int a[3][3];

float b[3][3];

int c[3][3];

a[0][0]=x1;

a[1][0]=y1;a[0][1]=x2;

a[0][2]=x3;

a[1][1]=y2;

a[1][2]=y3;

a[2][0]=1;

a[2][1]=1;

a[2][2]=1;

line(x1,y1,x2,y2);

line(x2,y2,x3,y3);

line(x3,y3,x1,y1);

for(i=0;i


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b[0][2]=tx;

b[1][0]=0;

b[1][1]=1;

b[1][2]=ty;

b[2][0]=0;b[2][1]=0;

b[2][2]=1;

for(int k=0;k


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OUTPUT:-


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11) W.A.P to input the co-ordinates of an object and perform scaling about any point.

#include

#include

#include

#include

int main()

{




int i,j,m,q,e,w,r,t,z;

float sx,sy,x,y;

couty1>>x2>>y2>>x3>>y3;int a[3][3];

float b[3][3];

int c[3][3];

a[0][0]=x1;

a[0][1]=x2;

a[0][2]=x3;

a[1][0]=y1;

a[1][1]=y2;

a[1][2]=y3;

a[2][0]=1;

a[2][1]=1;

a[2][2]=1;

line(x1,y1,x2,y2);

line(x2,y2,x3,y3);

line(x3,y3,x1,y1);

for(i=0;i


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b[1][2]=y-(y*sy);

b[2][0]=0;

b[2][1]=0;

b[2][2]=1;

for(i=0;i


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12) W.A.P to input the co-ordinates of any object and rotate that object about origin or

about any point depending upon the user.

#include

#include

#include

#include

int main()

{




int i,j,m,q,e,w,r,t,z,ch,s=0;

float sx,x,y;

couty1>>x2>>y2>>x3>>y3;

int a[3][3];

int n[2][3];

float b[3][3];

float d[2][2];

int c[3][3];

int f[2][3];

line(x1,y1,x2,y2);

line(x2,y2,x3,y3);

line(x3,y3,x1,y1);

cout


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cout


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cout


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c[i][j]+=(b[i][m]*a[m][j]);

}

}

}

q=c[0][0];

w=c[1][0];

e=c[0][1];

r=c[0][2];

t=c[1][1];

z=c[1][2];

line(q,w,e,t);

line(e,t,r,z);

line(r,z,q,w);

cout


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Cg Lab File Full Kantesh