#include<graphics.h>

#include<conio.h>

#include<dos.h>

#include<math.h>



# define pi 3.141592736



float cosa,cosb,sina,sinb;

void ini(float cos1,float cos2)

{

 cosa=cos(cos1*pi/180);

 cosb=cos(cos2*pi/180);

 sina=sin(cos1*pi/180);

 sinb=sin(cos2*pi/180);

}

void plot(int x,int y,int z,int &x1,int &y1)

{

 x1=x*cosa-y*sina;

 y1=x*sina*sinb+y*cosa*sinb+z*cosb;

 x1=320+int(x1);

 y1=240-int(y1);

}

void main()

{

 int gd=DETECT,gm;

 initgraph(&gd,&gm,"c:\\tc\\bgi");

 int p=0;

 while(!kbhit())

 {

 ini(p,p);

 int x[5],y[5];

 plot(5,5,1,x[0],y[0]);

 plot(45,5,1,x[1],y[1]);

 plot(5,45,1,x[3],y[3]);

 plot(45,45,1,x[4],y[4]);

 setcolor(RED);

 line(x[3],y[3],x[4],y[4]);

 line(x[1],y[1],x[4],y[4]);

 line(x[0],y[0],x[3],y[3]);

 line(x[0],y[0],x[1],y[1]);



 plot(25,25,140,x[2],y[2]);



 for(int i=0;i<5;i++)

  {

  setcolor(BROWN);

  line(x[2],y[2],x[i],y[i]);

  }

 p+=3;

 delay(20);

 cleardevice();

 }

}