2D-Shearing

#include<iostream.h>

#include<conio.h>

#include<graphics.h>

#include<dos.h>

#include<stdlib.h>

class Trans

{

public:

int tx,ty,n,i,j,z;

int a[50],b[50];

float sh;

void get();

void show();

};

void Trans::get()

{

cout<<"\n  Enter the Side of the Polygan:";

cin>>n;

cout<<"\n Enter the "<<2*n<<"  Co-ordinates Value:";

for(i=0;i<2*n;i++)

cin>>a[i];

fillpoly(n,a);

getch();

cout<<"\n\n Enter the Y Reference  Vector:";

cin>> tx;

cout<<"\n\n Enter the X Reference  Vector:";

cin>>ty;

cout<<"\n\n Enter the Shearing Point:";

cin>>sh;

}

void Trans::show()

{

while(1)

{

cout<<"\n\t\t\t1.X Shear";

cout<<"\n\t\t\t2.Y Shear";

cout<<"\n\t\t\t3. Exit";

cout<<"\n Enter your Choice:";

cin>>z;

switch(z)

{

case 1:

cleardevice();

cout<<"\n Before Shear:";

fillpoly(n,a);

getch();

cleardevice();

cout<<"\n\n\n After After";

for(i=0;i<2*n;i+=2)

{

b[i]=a[i]+(sh*(a[i+1]-tx));

b[i+1]=a[i+1];

}

fillpoly(n,b);

break;

case 2:

cleardevice();

cout<<"\n Before Shear:";

fillpoly(n,a);

getch();

cleardevice();

cout<<"\n\n\n After After";

for(i=0;i<2*n;i+=2)

{

b[i]=a[i];

b[i+1]=a[i+1]+(sh*(a[i]-ty));

}

fillpoly(n,b);

break;

case 3:

exit(0);

break;

}

}

}

void main()

{

int v=DETECT,c=0;

initgraph(&v,&c,"");

cleardevice();

Trans w;

int q;

while(1)

{

cout<<"\n\t\t\t\t SHEARING";

cout<<"\n MENU:";

cout<<"\n\n\t\t\t 1.Shearing:";

cout<<"\n\n\t\t\t 2.Exit";

cout<<"\n Enter Your Option:";

cin>>q;

switch(q)

{

case 1:

w.get();

w.show();

break;

case 2:

exit(0);

default:

cout<<"\n\t\t\t Invalid!!!";

break;

}

getch();

}

}