Demo/kdp/scaletest.c

   1 #include <math.h>
   2
   3 #include "kdp.h"
   4 #include "kdpgfx.h"
   5 #include <stdlib.h>
   6
   7 float x[5000],y[5000],z[5000];
   8 float xb[5000],yb[5000],zb[5000];
   9 int sx[5000],sy[5000];
  10 float size[5000];
  11
  12 UBYTE tex[256*256];
  13
  14 int nump,numf;
  15
  16 int load3d(char *filename)
  17 {
  18   UBYTE *file;
  19   int pointo;
  20   int i;
  21   float xofs,yofs,zofs;
  22
  23   if (!(file=KDPloadFile(filename)))
  24     return 0;
  25   if (KDPgetMlong(&file[0])!=0x33445257)
  26     return 0;
  27   pointo=KDPgetMlong(&file[6]);
  28   numf=KDPgetMword(&file[10])+1;
  29   nump=KDPgetMword(&file[pointo])+1;
  30
  31   pointo+=2;
  32   for(i=0;i<nump;i++)
  33     {
  34     x[i]=(float)KDPgetMword(&file[pointo])/1000;
  35     y[i]=(float)KDPgetMword(&file[pointo+2])/1000;
  36     z[i]=(float)KDPgetMword(&file[pointo+4])/1000;
  37     pointo+=6;
  38     }
  39   xofs=0;yofs=0;zofs=0;
  40   for(i=0;i<nump;i++)
  41     {
  42     xofs+=x[i];
  43     yofs+=y[i];
  44     zofs+=z[i];
  45     }
  46   xofs/=nump;
  47   yofs/=nump;
  48   zofs/=nump;
  49   for(i=0;i<nump;i++)
  50     {
  51     x[i]-=xofs;
  52     y[i]-=yofs;
  53     z[i]-=zofs;
  54     }
  55   return 1;
  56 }
  57
  58
  59
  60
  61
  62 void project(float zx)
  63 {
  64   int i;
  65   float zz;
  66   for(i=0;i<nump;i++)
  67     {
  68     zz=-(zb[i]-zx);
  69     if (zz!=0)
  70       {
  71       sx[i]=(int)((xb[i]*256)/zz)+160;
  72       sy[i]=(int)((yb[i]*256)/zz)+100;
  73       size[i]=256/zz;
  74       }
  75     }
  76 }
  77
  78 void rotate(float rx,float ry,float rz)
  79 {
  80   int i;
  81   float xx,xy,xz;
  82   float yx,yy,yz;
  83   float zx,zy,zz;
  84   float sx,sy,sz;
  85   float cx,cy,cz;
  86   sx=sin(rx);cx=cos(rx);
  87   sy=sin(ry);cy=cos(ry);
  88   sz=sin(rz);cz=cos(rz);
  89   xx=cy*cz;          xy=cy*sz;          xz=-sy;
  90   yx=sx*sy*cz-cx*sz; yy=sx*sy*sz+cx*cz; yz=sx*cy;
  91   zx=cx*sy*cz+sx*sz; zy=cx*sy*sz-sx*cz; zz=cx*cy;
  92   for(i=0;i<nump;i++)
  93     {
  94     xb[i]=x[i]*xx + y[i]*xy + z[i]*xz;
  95     yb[i]=x[i]*yx + y[i]*yy + z[i]*yz;
  96     zb[i]=x[i]*zx + y[i]*zy + z[i]*zz;
  97     }
  98 }
  99
 100
 101 int main(int argc,char **argv)
 102         {
 103         KDPscreen screen;
 104         KDPmouse mouse;
 105         UBYTE *vmem;
 106         UBYTE pal[2][256*3];
 107
 108   float a=0,b=0,c=0;
 109   float da=0,db=0,dc=0;
 110   int i;
 111   float zx=20;
 112   float m=1;
 113   float speed=0;
 114   float qx=0,qy=0;
 115
 116    if (argc < 2)
 117    {
 118      printf("usage: scaletest <3dobj>\n");
 119      return 0;
 120    }
 121
 122   if(load3d(argv[1])==0)
 123         {
 124         printf("hmm...\n");return 0;
 125         }
 126
 127   KDPpalRange(  0,  0,  0,
 128                                                 150,180,220,
 129                                                  0,200,pal[0]);
 130   KDPpalRange(150,180,220,
 131                                                 255,255,255,
 132                                                 200,255,pal[0]);
 133   for(i=0;i<256;i++)
 134     pal[1][i]=pal[0][i]/2;
 135   KDPreadBMP("bmp/cir.bmp",0,tex);
 136         if(KDPopen(&screen))
 137         {
 138         vmem=screen.vmem;
 139           KDPgetMouse(&mouse);
 140           KDPgetMouse(&mouse);
 141           KDPsetPal(pal[0]);
 142                 while(mouse.button!=3)
 143                         {
 144                         if(mouse.button==0)
 145                                 {
 146                           da+=(float)mouse.xspeed/500;
 147                           dc+=(float)mouse.yspeed/500;
 148                           }
 149           if(mouse.button==1) {zx+=(float)mouse.yspeed/10;db+=(float)mouse.xspeed/500;}
 150           if(mouse.button==2) {speed+=(float)mouse.yspeed/50;m+=(float)mouse.xspeed/50;da=0;db=0;dc=0;}
 151           if(m<1) m=1;
 152           a+=da;b+=db;c+=dc;
 153           rotate(a,b,c);
 154           project(zx);
 155           qx+=0.03;
 156           qy+=0.03;
 157
 158
 159
 160           for(i=0;i<nump;i++)
 161                   KDPsp256(sx[i],sy[i],(int)(size[i]),tex,vmem);
 162
 163           KDPwaitVr();
 164
 165
 166           //KDPblur2(vmem);
 167           KDPshow(vmem);
 168                         KDPcls(vmem);
 169                         KDPgetMouse(&mouse);
 170                         }
 171                 }
 172           KDPclose(&screen);
 173     return 0;
 174         }