2D Transformation Translation Rotation Scaling

The Below Programs are for 2D Transformation. This is a part of Mumbai University MCA Colleges Computer Graphics MCA Sem 2.2D Translation: 

#include<graphics.h>

#include<stdlib.h>

#include<stdio.h>

#include<math.h>

void main()

{

int graphdriver=DETECT,graphmode,errorcode;

int i;

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

printf("Enter the 2 line end points:");

printf("x1,y1,x2,y2");

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

initgraph(&graphdriver,&graphmode,"c:\\tc\\bgi");

line(x1,y1,x2,y2);

printf("Enter translation co-ordinates ");

printf("x,y");

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

x1=x1+x;

y1=y1+y;

x2=x2+x;

y2=y2+y;

printf("Line after translation");

line(x1,y1,x2,y2);

getch();

closegraph();

}

2D Rotation:

#include<graphics.h>

#include<stdlib.h>

#include<stdio.h>

#include<math.h>

void main()

{

int graphdriver=DETECT,graphmode,errorcode;

int i;

int x2,y2,x1,y1,x,y,xn,yn;

double r11,r12,r21,r22,th;

clrscr();

printf("Enter the 2 line end points:");

printf("x1,y1,x2,y2");

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

initgraph(&graphdriver,&graphmode,"c:\\tc\\bgi");

line(x1,y1,x2,y2);

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

scanf("%lf",&th);

r11=cos((th*3.1428)/180);

r12=sin((th*3.1428)/180);

r21=(-sin((th*3.1428)/180));

r22=cos((th*3.1428)/180);

//printf("%lf  %lf  %lf  %lf",r11,r12,r21,r22);

xn=((x2*r11)-(y2*r12));

yn=((x2*r12)+(y2*r11));

line(x1,y1,xn,yn);

getch();

closegraph();

}

2D Scaling:

#include<graphics.h>

#include<stdlib.h>

#include<stdio.h>

#include<math.h>

void main()

{

int graphdriver=DETECT,graphmode,errorcode;

int i;

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

printf("Enter the 2 line end points:");

printf("x1,y1,x2,y2");

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

initgraph(&graphdriver,&graphmode,"c:\\tc\\bgi");

line(x1,y1,x2,y2);

printf("Enter scaling co-ordinates ");

printf("x,y");

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

x1=(x1*x);

y1=(y1*y);

x2=(x2*x);

y2=(y2*y);

printf("Line after scaling");

line(x1,y1,x2,y2);

getch();

closegraph();

}





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