Scaling Transformation

This Code Is One Of The Most Simplified Codes For

Scaling Transformation In C++

Functions Used:

1. getmaxx(); for getting maximum value of x axis of the screen.
2. getmaxy(); for getting maximum value of y axis of the screen.

Code:

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

void main()

{

int gm,gd=DETECT,maxx,maxy,midx,midy,x1,y1,x,y,scx,scy;

initgraph(&gd,&gm,"C:\\turboc3\\bgi");

maxx=getmaxx();

maxy=getmaxy();

midx=maxx/2;

midy=maxy/2;

setcolor(WHITE);

line(0,midy,maxx,midy);

line(midx,0,midx,maxx);

cout<<"enter the \nx co-ordinate of the edges: ";

cin>>x1;

cout<<"y co-ordinate of the edges: ";

cin>>y1;

x=midx+x1;

y=midy-y1;

line(midx,midy,x,midy);

line(x,midy,x,y);

line(x,y,midx,y);

line(midx,y,midx,midy);

cout<<"enter scaling factors ";

cout<<"\nsc x: ";

cin>>scx;

cout<<"sc y: ";

cin>>scy;

x=midx+(scx*x1);

y=midy-(scy*y1);

setcolor(RED);

line(midx,midy,x,midy);

line(x,midy,x,y);

line(x,y,midx,y);

line(midx,y,midx,midy);

getch();

}
Output: