cube2.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;
   }
}
void crossx1(point1 * pot1,point1 * pot2,float x)
{
     pot2->y=cos(x)*pot1->y-sin(x)*pot1->z;
     pot2->z= sin(x)*pot1->y+cos(x)*pot1->z;
     pot2->x=pot1->x;


}
void crossy1(point1 * pot1,point1 * pot2,float y)
{

   pot2->x=cos(y)* pot1->x+sin(y)*pot1->z;
   pot2->z=-sin(y)*pot1->x+cos(y)*pot1->z;
   pot2->y=pot1->y;

}
void crossz1(point1 * pot1,point1 * pot2,float z)
{

     pot2->x=cos(z)*pot1->x-sin(z)*pot1->y;
     pot2->y=sin(z)*pot1->x+cos(z)*pot1->y;
     pot2->z=pot1->z;
}

void xuatu(float x,float y,float z,int m,int n,int s,int index)

{   int i,j;
    point1 pot1[2500],pot2[2500];
  switch(index)
 { case 1:
     {   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,pot1,2500,y);
      crossz(pot1,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);
       }
     }break;

  case 2:
     { 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,pot1,2500,y);
      crossz(pot1,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);
      }
     }break;
   case 3:
     { for(i=0;i<50;i++)
       for(j=0;j<50;j++)

      {
         pot1[i*50+j].x=-25; pot1[i*50+j].y=i-25;
         pot1[i*50+j].z=j-25;  pot1[i*50+j].color=3;
      }
      crossx(pot1,pot2,2500,x);
      crossy(pot2,pot1,2500,y);
      crossz(pot1,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);
      }
     }break;
     case 4:
     { for(i=0;i<50;i++)
       for(j=0;j<50;j++)

      {
         pot1[i*50+j].x=25; pot1[i*50+j].y=i-25;
         pot1[i*50+j].z=j-25;  pot1[i*50+j].color=4;
      }
      crossx(pot1,pot2,2500,x);
      crossy(pot2,pot1,2500,y);
      crossz(pot1,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);
      }
     }break;
     case 5:
     { for(i=0;i<50;i++)
       for(j=0;j<50;j++)

      {
         pot1[i*50+j].x=i-25; pot1[i*50+j].y=-25;
         pot1[i*50+j].z=j-25;  pot1[i*50+j].color=5;
      }
      crossx(pot1,pot2,2500,x);
      crossy(pot2,pot1,2500,y);
      crossz(pot1,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);
      }
     }break;

     case 6:
     { for(i=0;i<50;i++)
       for(j=0;j<50;j++)

      {
         pot1[i*50+j].x=i-25; pot1[i*50+j].y=25;
         pot1[i*50+j].z=j-25;  pot1[i*50+j].color=6;
      }
      crossx(pot1,pot2,2500,x);
      crossy(pot2,pot1,2500,y);
      crossz(pot1,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);
      }
     }break;

 }
}




generate1(float x,float y,float z,int m,int n,int s)
{
     int i,j,t;

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++)
     {  crossx1(&sf0[i].xin,&sf1[i].xin,x);
        crossy1(&sf1[i].xin,&sf0[i].xin,y);
        crossz1(&sf0[i].xin,&sf1[i].xin,z);
        sf1[i].index=sf0[i].index;
}

/*printf("%d        %d         %d             %d\n",sf1[i].xin.x,sf1[i].xin.y,sf1[i].xin.z,sf1[i].index);
                             */
      for(i=0;i<6;i++)
      for(j=0;j<5;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+1].xin.z=t;
           t=sf1[j].index;
          sf1[j].index=sf1[j+1].index;
          sf1[j+1].index=t;    }
     }


     for(i=2;i>=0;i--)
     {  xuatu(x,y,z,m,n,s,sf1[i].index);
       /* printf("%d\n",sf1[i].index); */} 

}

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");

/*generate1(0,pi/15,0,m,n,1);*/

while(!kbhit())

{ x+=pi/35;y+=pi/35;z+=pi/35;
  m+=a;n+=b;
  if(x==pi) {x=y=z=0; }
   if((m==435)&&(a==5))a=-5;
  if((m==-185)&&(a==-5))a=5;

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

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

getch();
closegraph();
}