#include "graphics.h"
#include "math.h"
#include "stdio.h"

main()
{

int driver, mode, i, v, x[99], y[99], xx, yy, zz, l, x2[99], u, e;
char ch;
float a, b,d, px[99], py[99], pz[99], px0[99],py0[99],pz0[99],px1[99],py1[99];
float sina, cosa, sinb, cosb;
FILE *fp;

d=100;
a=3.15;
b=-0.3;
e=3;

i=1;
l=0;

printf("Paina ykk”st„ jos sinulla on 3-D lasit ja jos ei ,niin paina nollaa.");
scanf("%d", &u);

driver=VGA;
mode=VGAHI;
initgraph(&driver, &mode, "");

if ((fp=fopen("alus.dat", "r"))==NULL) {
	line(0, 0, 640, 480);
					  }
fp=fopen("alus.dat", "r");

fscanf(fp, "%2i", &v);

while (i<=v) {

  fscanf(fp,"%4i%4i%4i", &xx, &yy, &zz);
  px0[i]=xx;
  py0[i]=yy;
  pz0[i]=zz;

  i++;
	    }

while (l<1)    {

i=1;

while (i<=v) {
  sina=sin(a);
  cosa=cos(a);
  sinb=sin(b);
  cosb=cos(b);

  px1[i]=px0[i]*cosa-py0[i]*sina;

  py1[i]=px0[i]*sina+py0[i]*cosa;


  py[i]=py1[i]*cosb+pz0[i]*sinb;

  pz[i]=-py1[i]*sinb+pz0[i]*cosb;

  px[i]=px1[i];

  x[i]=e*d/(d+pz[i])*px[i]+320;
  x2[i]=pz[i]/(d+pz[i])*15+x[i];
  y[i]=e*d/(d+pz[i])*py[i]+240;

  i++;
	      }
i=1;
while(i<=v) {
  if ((i>1) && (i%2==0)) {

    setcolor(GREEN);
    line(x[i], y[i], x[i-1], y[i-1]);

    if(u==1) {
       setcolor(RED);
       line(x2[i], y[i], x2[i-1], y[i-1]);
	     }
			  }

  i=i++;
	    }
ch=getch();
if (ch=='4') {
   clearviewport();

   a=a+0.1;
	     }
if (ch=='6') {
   clearviewport();

   a=a-0.1;
	     }
if (ch=='2') {
   clearviewport();

   b=b-0.1;
	     }
if (ch=='8') {
   clearviewport();

   b=b+0.1;
	     }

if (ch=='+') {
   clearviewport();

   i=1;
   while(i<=v) {
	pz0[i]=pz0[i]-10;
	 i++;
	       }
	     }
if (ch=='-') {
   clearviewport();

   i=1;
   while(i<=v) {
	pz0[i]=pz0[i]+10;
	  i++;
	       }
	     }

if (ch==' ') l=1;

		}
}