Program for 3-D Transformation

Source Code

#include<iostream.h>
#include<dos.h>
#include<stdio.h>
#include<math.h>
#include<conio.h>
#include<graphics.h>
#include<process.h>

int gd=DETECT,gm;
double x1,x2,y1,y2;

void show_message()
{
char *mess[]={"-","=","["," ","3","D","-","T","r","a","n","s",
     "f","o","r","m","a","t","i","o","n"," ","]","=","-"};
int xx=28,xxx=52,i,j;
_setcursortype(_NOCURSOR);
for(i=0,j=24;i<15,j>=12;i++,j--)
{
gotoxy(xx,1);
cout<<mess[i];
xx++;
gotoxy(xxx,1);
cout<<mess[j];
xxx--;
delay(50);
}
_setcursortype(_NORMALCURSOR);
}


void draw_cube(double edge[20][3])
      {
        initgraph(&gd,&gm,"..\bgi");
int i;
clearviewport();
for(i=0;i<19;i++)
      {
      x1=edge[i][0]+edge[i][2]*(cos(2.3562));
      y1=edge[i][1]-edge[i][2]*(sin(2.3562));
      x2=edge[i+1][0]+edge[i+1][2]*(cos(2.3562));
      y2=edge[i+1][1]-edge[i+1][2]*(sin(2.3562));
line(x1+320,240-y1,x2+320,240-y2);
    }
line(320,240,320,25);
line(320,240,550,240);
line(320,240,150,410);
getch();
      closegraph();
      }

void scale(double edge[20][3])
      {
double a,b,c;
int i;
cout<<"
" Enter The Scaling Factors ":=";
cin>>a>>b>>c;
        initgraph(&gd,&gm,"..\bgi");
clearviewport();
  for(i=0;i<20;i++)
{
edge[i][0]=edge[i][0]*a;
edge[i][1]=edge[i][1]*b;
edge[i][2]=edge[i][2]*c;
}
draw_cube(edge);
      closegraph();
      }

void translate(double edge[20][3])
  {
      int a,b,c;
      int i;
cout<<"
" Enter The Translation Factors ":=";
cin>>a>>b>>c;
        initgraph(&gd,&gm,"..\bgi");
clearviewport();
        for(i=0;i<20;i++)
      {
edge[i][0]+=a;
edge[i][0]+=b;
edge[i][0]+=c;
      }
    draw_cube(edge);
      closegraph();
  }

void rotate(double edge[20][3])
  {
      int ch;
      int i;
      double temp,theta,temp1;
    clrscr();
  cout<<"
-=[ Rotation About ]=-";
  cout<<"

1:==>" X-Axis "";
cout<<"
2:==>" Y-Axis "";
        cout<<"
3:==>" Z-Axis "";
        cout<<"

" Enter Your Choice ":=";
cin>>ch;
switch(ch)
{
    case 1:
cout<<"
" Enter The Angle ":=";
cin>>theta;
theta=(theta*3.14)/180;
for(i=0;i<20;i++)
  {
    edge[i][0]=edge[i][0];
      temp=edge[i][1];
      temp1=edge[i][2];
    edge[i][1]=temp*cos(theta)-temp1*sin(theta);
    edge[i][2]=temp*sin(theta)+temp1*cos(theta);
  }
draw_cube(edge);
break;

    case 2:
cout<<"
" Enter The Angle ":=";
cin>>theta;
theta=(theta*3.14)/180;
for(i=0;i<20;i++)
  {
    edge[i][1]=edge[i][1];
      temp=edge[i][0];
      temp1=edge[i][2];
    edge[i][0]=temp*cos(theta)+temp1*sin(theta);
    edge[i][2]=-temp*sin(theta)+temp1*cos(theta);
  }
draw_cube(edge);
break;

    case 3:
cout<<"
" Enter The Angle ":=";
cin>>theta;
theta=(theta*3.14)/180;
for(i=0;i<20;i++)
  {
    edge[i][2]=edge[i][2];
      temp=edge[i][0];
      temp1=edge[i][1];
    edge[i][0]=temp*cos(theta)-temp1*sin(theta);
    edge[i][1]=temp*sin(theta)+temp1*cos(theta);
  }
draw_cube(edge);
break;
}
}

void reflect(double edge[20][3])
{
    int ch;
    int i;
    clrscr();
  cout<<"
-=[ Reflection About ]=-";
  cout<<"

1:==>" X-Axis "";
cout<<"
2:==>" Y-Axis "";
        cout<<"
3:==>" Z-Axis "";
        cout<<"

" Enter Your Choice ":=";
        cin>>ch;
  switch(ch)
{
    case 1:
for(i=0;i<20;i++)
  {
    edge[i][0]=edge[i][0];
    edge[i][1]=-edge[i][1];
    edge[i][2]=-edge[i][2];
  }
draw_cube(edge);
break;

    case 2:
    for(i=0;i<20;i++)
  {
    edge[i][1]=edge[i][1];
    edge[i][0]=-edge[i][0];
    edge[i][2]=-edge[i][2];
  }
draw_cube(edge);
break;

    case 3:
    for(i=0;i<20;i++)
  {
    edge[i][2]=edge[i][2];
    edge[i][0]=-edge[i][0];
    edge[i][1]=-edge[i][1];
  }
draw_cube(edge);
break;
}
}

void perspect(double edge[20][3])
{
    int ch;
    int i;
    double p,q,r;
    clrscr();
  cout<<"
-=[ Perspective Projection About ]=-";
  cout<<"

1:==>" X-Axis "";
cout<<"
2:==>" Y-Axis "";
        cout<<"
3:==>" Z-Axis "";
        cout<<"

" Enter Your Choice ":=";
cin>>ch;
switch(ch)
{
    case 1:
  cout<<"
" Enter P ":=";
cin>>p;
for(i=0;i<20;i++)
  {
    edge[i][0]=edge[i][0]/(p*edge[i][0]+1);
    edge[i][1]=edge[i][1]/(p*edge[i][0]+1);
    edge[i][2]=edge[i][2]/(p*edge[i][0]+1);
  }
draw_cube(edge);
      break;

    case 2:
cout<<"
" Enter Q ":=";
cin>>q;
for(i=0;i<20;i++)
  {
    edge[i][1]=edge[i][1]/(edge[i][1]*q+1);
    edge[i][0]=edge[i][0]/(edge[i][1]*q+1);
    edge[i][2]=edge[i][2]/(edge[i][1]*q+1);
  }
draw_cube(edge);
break;

    case 3:
cout<<"
" Enter R ":=";
cin>>r;
for(i=0;i<20;i++)
  {
    edge[i][2]=edge[i][2]/(edge[i][2]*r+1);
    edge[i][0]=edge[i][0]/(edge[i][2]*r+1);
    edge[i][1]=edge[i][1]/(edge[i][2]*r+1);
  }
draw_cube(edge);
break;
}
      closegraph();
}


void main()
{
  int choice;
      double edge[20][3]=
    {
100,0,0,
100,100,0,
0,100,0,
0,100,100,
0,0,100,
0,0,0,
100,0,0,
100,0,100,
100,75,100,
75,100,100,
100,100,75,
100,100,0,
100,100,75,
100,75,100,
75,100,100,
0,100,100,
0,100,0,
0,0,0,
0,0,100,
100,0,100
    };
        while(1)
        {
clrscr();
        show_message();
cout<<"

1:==>" Draw Cube "";
cout<<"
2:==>" Scaling "";
cout<<"
3:==>" Rotation "";
cout<<"
4:==>" Reflection "";
cout<<"
5:==>" Translation "";
cout<<"
6:==>" Perspective Projection "";
cout<<"
7:==>" Exit "";
cout<<"

" Enter Your Choice ":=";
      cin>>choice;
switch(choice)
{
case 1:
draw_cube(edge);
break;

case 2:
scale(edge);
break;

case 3:
rotate(edge);
break;

case 4:
reflect(edge);
break;

case 5:
translate(edge);
break;

case 6:
    perspect(edge);
break;

case 7:
exit(0);

                default:
                cout<<"
a" Press A Valid Key...!!! "";
                       getch();
                       break;
}
       closegraph();
        }
}