mdlcomp.c

   1 // Copyright (C) 2021 Harry Godden (hgn) - All Rights Reserved
   2
   3 #define VG_TOOLS
   4 #include "vg/vg.h"
   5
   6 // Super basic model compiler
   7 int main( int argc, char *argv[] )
   8 {
   9         if( argc < 3 )
  10         {
  11                 vg_error( "Need input/output files\n" );
  12                 return 0;
  13         }
  14
  15         float *vertex_buffer = NULL;
  16
  17         int c;
  18         FILE *file, *output;
  19         file = fopen( argv[1], "r" );
  20
  21         if( file )
  22         {
  23                 output = fopen( argv[2], "w" );
  24                 if( !output )
  25                 {
  26                         vg_error( "couldn't open output for writing\n" );
  27                         fclose(file);
  28                         return 0;
  29                 }
  30
  31                 fprintf( output, "/*triangle buffer generated from source file: '%s'*/\n", argv[1] );
  32
  33                 char line[512];
  34                 int i = 0, j = 0;
  35
  36                 while(( c = getc(file)) != EOF )
  37                 {
  38                         if( i >= vg_list_size( line ) )
  39                         {
  40                                 vg_error( "Line was way too long.. (line %d)\n", j+1 );
  41                                 arrfree( vertex_buffer );
  42                                 fclose(file);
  43                                 fclose(output);
  44                                 return 0;
  45                         }
  46
  47                         if( c == '\n' )
  48                         {
  49                                 line[i] = 0x00;
  50
  51                                 // Parse vert
  52                                 if( line[0] == 'v' )
  53                                 {
  54                                         v3f vert;
  55                                         sscanf( line+2, "%f %f %f", vert, vert+1, vert+2 );
  56                                         arrpush( vertex_buffer, vert[0] );
  57                                         arrpush( vertex_buffer, -vert[2] );
  58                                 }
  59
  60                                 // Write face
  61                                 else if( line[0] == 'f' )
  62                                 {
  63                                         int tri[3];
  64                                         sscanf( line+2, "%d %d %d", tri, tri+1, tri+2 );
  65
  66                                         for( int k = 0; k < 3; k ++ )
  67                                                 fprintf( output, "%.6ff,%.6ff,", vertex_buffer[(tri[k]-1)*2], vertex_buffer[(tri[k]-1)*2+1] );
  68                                         fprintf( output, "\n" );
  69                                 }
  70
  71                                 i = 0;
  72                                 j ++;
  73                         }
  74                         else
  75                         {
  76                                 line[i ++] = c;
  77                         }
  78                 }
  79
  80                 arrfree( vertex_buffer );
  81                 fclose(file);
  82                 fclose(output);
  83         }
  84         else
  85         {
  86                 vg_error( "Couldn't open source file\n" );
  87                 return 0;
  88         }
  89 }