diff options
Diffstat (limited to 'src/obj2model.c')
| -rw-r--r-- | src/obj2model.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/src/obj2model.c b/src/obj2model.c index a3ac831..1e160ff 100644 --- a/src/obj2model.c +++ b/src/obj2model.c @@ -14,9 +14,154 @@ #endif #include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include "utils.c" + +#define MAX_VERTICES 65536 int main(int argc, char *argv[]) { + FILE *fh; + FILE *out; + float vtmp[3*MAX_VERTICES]; + float vntmp[3*MAX_VERTICES]; + int n_vtmp, n_vntmp; + int nprev; + + fh = fopen(argv[1], "r"); + if ( fh == NULL ) { + fprintf(stderr, "Couldn't open '%s'\n", argv[1]); + return 1; + } + + /* Zip through and find all the vertices */ + n_vtmp = 0; + n_vntmp = 0; + while ( !feof(fh) ) { + + char line[1024]; + float x, y, z; + size_t s; + + fgets(line, 1023, fh); + s = 0; + for ( ; s<strlen(line); s++ ) { + if ( line[s] != ' ' ) break; + } + + if ( line[s] == '#' ) { + continue; + } + + if ( sscanf(line+s, "v %f %f %f\n", &x, &y, &z) == 3 ) { + vtmp[3*n_vtmp+0] = x; + vtmp[3*n_vtmp+1] = y; + vtmp[3*n_vtmp+2] = z; + n_vtmp++; + continue; + } + + if ( sscanf(line+s, "vn %f %f %f\n", &x, &y, &z) == 3 ) { + vntmp[3*n_vntmp+0] = x; + vntmp[3*n_vntmp+1] = y; + vntmp[3*n_vntmp+2] = z; + n_vntmp++; + continue; + } + + } + + /* Go through again and look for faces */ + rewind(fh); + out = fopen(argv[2], "w"); + fprintf(out, "# %s\n", argv[1]); + fprintf(out, "\n"); + nprev = 0; + while ( !feof(fh) ) { + + char line[1024]; + char **bits; + int n, i; + + fgets(line, 1023, fh); + n = assplode(line, " \t\r\n", &bits, ASSPLODE_NONE); + + /* Read in a face */ + if ( strcmp(bits[0], "f") == 0 ) { + + int nthis; + + nthis = n-1; + if ( nthis != nprev ) { + if ( nprev != 0 ) fprintf(out, "\n"); + if ( nthis == 4 ) { + fprintf(out, "QUADS\n"); + } else { + fprintf(out, "POLYGONS\n"); + } + nprev = nthis; + } else { + fprintf(out, "#\n"); + } + + for ( i=1; i<n; i++ ) { + + char **sp; + int np, nnum, j, nslash; + + nslash = 0; + for ( j=0; j<strlen(bits[i]); j++ ) { + if ( bits[i][j] == '/' ) nslash++; + } + if ( nslash == 2 ) { + + int vnum; + + np = assplode(bits[i], "/", &sp, ASSPLODE_DUPS); + if ( np != 3 ) { + continue; + } + vnum = atoi(sp[0])-1; + nnum = atoi(sp[2])-1; + if ( vnum >= n_vtmp ) { + fprintf(stderr, "Vertex index is too high (%i/%i)\n", vnum, n_vtmp); + continue; + } + if ( nnum >= n_vntmp ) { + fprintf(stderr, "Normal index is too high (%i/%i)\n", nnum, n_vntmp); + continue; + } + fprintf(out, "%+8.3f %+8.3f %+8.3f\n", vtmp[3*vnum+0], vtmp[3*vnum+1], + vtmp[3*vnum+2]); + free(sp[0]); + free(sp[1]); + free(sp[2]); + free(sp); + + } else if ( nslash == 0 ) { + + int vnum; + vnum = atoi(bits[i]); + fprintf(out, "%+8.3f %+8.3f %+8.3f\n", vtmp[3*vnum+0], vtmp[3*vnum+1], + vtmp[3*vnum+2]); + + } + + } + + } + + for ( i=0; i<n; i++ ) free(bits[i]); + free(bits); + + } + fprintf(out, "\n"); + + fclose(fh); + fclose(out); + return 0; } |