cube.c

计算机图形学

#include "graphics.h"
#include "math.h"
#include "mem.h"
#define pi 3.1415926



typedef struct {
            int x;
            int y;
            int z;
            int color;
               } point1;

typedef struct {int index;
                point1 xin;}surface;



void crossx(point1 * pot1,point1 * pot2,int n,float x)
{ int i;
  for(i=0;i<=n-1;i++)
  {  pot2[i].y= cos(x)*pot1[i].y-sin(x)*pot1[i].z;
     pot2[i].z= sin(x)*pot1[i].y+cos(x)*pot1[i].z;
     pot2[i].x=pot1[i].x;
     pot2[i].color=pot1[i].color;

   }

}
void crossy(point1 * pot1,point1 * pot2,int n,float y)
{ int i;
  for(i=0;i<=n-1;i++)
  {pot2[i].x=cos(y)* pot1[i].x+sin(y)*pot1[i].z;
   pot2[i].z=-sin(y)*pot1[i].x+cos(y)*pot1[i].z;
   pot2[i].y=pot1[i].y;
   pot2[i].color=pot1[i].color;
   }
}
void crossz(point1 * pot1,point1 * pot2,int n,float z)
{ int i;
  for(i=0;i<=n-1;i++)
   { pot2[i].x=cos(z)*pot1[i].x-sin(z)*pot1[i].y;
     pot2[i].y=sin(z)*pot1[i].x+cos(z)*pot1[i].y;
     pot2[i].z=pot1[i].z;
     pot2[i].color=pot1[i].color;
   }
}
generate1(float x,float y,float z,int m,int n,int s)
{
     int i,j,t;

     point1 pot1[2500],pot2[2500];

     surface sf0[6]={{1,{0,0,25}},{2,{0,0,-25}},{3,{-25,0,0}},{4,{25,0,0}},{5,{0,-25,0}},{6,{0,25,0}}};
     surface sf1[6];

     for(i=0;i<6;i++)
     {  crossx(&sf0[i].xin,&sf1[i].xin,1,x);
        crossy(&sf0[i].xin,&sf1[i].xin,1,y);
        crossz(&sf0[i].xin,&sf1[i].xin,1,z); }

      for(i=0;i<6;i++)
      for(j=0;j<5-i;j++)
     {   if(sf1[j].xin.z<sf1[j+1].xin.z)
          t=sf1[j].xin.z;
          sf1[j].xin.z=sf1[j+1].xin.z;
          sf1[j].xin.z=t;
     }


      for(i=0;i<50;i++)
      for(j=0;j<50;j++)
      {    pot1[i*50+j].x=i-25;
           pot1[i*50+j].y=j-25;
           pot1[i*50+j].z=25;
           pot1[i*50+j].color=1;
      }

      crossx(pot1,pot2,2500,x);
      crossy(pot2,pot2,2500,y);
      crossz(pot2,pot2,2500,z);
      

     for(i=0;i<2500;i++)
     { if(s==1)putpixel(pot2[i].x+200+m,pot2[i].y+200+n,pot2[i].color);
       else putpixel(pot2[i].x+200+m,pot2[i].y+200+n,0);
      }


      for(i=0;i<50;i++)
      for(j=0;j<50;j++)

      {
         pot1[i*50+j].x=i-25; pot1[i*50+j].y=j-25;
         pot1[i*50+j].z=-25;  pot1[i*50+j].color=2;
      }
      crossx(pot1,pot2,2500,x);
      crossy(pot2,pot2,2500,y);
      crossz(pot2,pot2,2500,z);
      for(i=0;i<2500;i++)
      { if(s==1) putpixel( pot2[i].x+200+m,pot2[i].y+200+n,pot2[i].color);
      else putpixel( pot2[i].x+200+m,pot2[i].y+200+n,0);
      }



}


void main()
{
int driver=DETECT,mode;
float x=0,y=0,z=0; int m=0,n=0,a=5,b=5,s=0;
registerbgidriver(EGAVGA_driver);
initgraph(&driver,&mode,"\\tc");
initgraph(&driver,&mode,"\\tc");


while(!kbhit())

{ x+=pi/30;y+=pi/30;
  m+=a;n+=b;
  if(x==pi) {x=y=z=0; }
   if((m==435)&&(a==5))a=-5;
  if((m==-200)&&(a==-5))a=5;

  if((n==210)&&(b==5))b=-5;
  if((n==-180)&&(b==-5))b=5;

   generate1(x,y,z,m,n,1);
   delay(1000);
   generate1(x,y,z,m,n,0);}






   getch();

closegraph();
}