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greg |
2.1 |
#ifndef lint
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greg |
2.3 |
static const char RCSid[] = "$Id: convertobj.c,v 2.2 2020/04/23 03:19:48 greg Exp $";
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greg |
2.1 |
#endif
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/*
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* convertobj.c
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*
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* Convert .OBJ scene to Radiance
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*
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* Created by Greg Ward on Thu Apr 22 2004.
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*/
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greg |
2.2 |
#include "paths.h"
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greg |
2.1 |
#include "rterror.h"
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#include "objutil.h"
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/* Callback to convert face to Radiance */
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static int
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radface(Scene *sc, Face *f, void *ptr)
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{
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static int fcnt = 0;
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FILE *fp = (FILE *)ptr;
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int i;
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if (f->flags & FACE_DEGENERATE)
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return(0);
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fprintf(fp, "\n%s polygon %s.%d\n0\n0\n%d\n", sc->matname[f->mat],
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sc->grpname[f->grp], ++fcnt, 3*f->nv);
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for (i = 0; i < f->nv; i++) {
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Vertex *vp = sc->vert + f->v[i].vid;
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fprintf(fp, "\t%18.12g %18.12g %18.12g\n",
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vp->p[0], vp->p[1], vp->p[2]);
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}
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return(1);
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}
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/* Convert indicated faces to Radiance, return # written or -1 on error */
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int
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toRadiance(Scene *sc, FILE *fp, int flreq, int flexc)
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{
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int n;
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if (sc == NULL || sc->nfaces <= 0 || fp == NULL)
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return(0);
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/* write comments */
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for (n = 0; n < sc->ndescr; n++)
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fprintf(fp, "# %s\n", sc->descr[n]);
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/* write faces */
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n = foreachFace(sc, radface, flreq, flexc, (void *)fp);
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if (fflush(fp) < 0) {
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greg |
2.3 |
error(SYSTEM, "Error writing Radiance scene data");
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greg |
2.1 |
return(-1);
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}
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return(n);
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}
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/* Convert faces to Radiance file, return # written or -1 on error */
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int
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writeRadiance(Scene *sc, const char *fspec, int flreq, int flexc)
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{
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extern char *progname;
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FILE *fp;
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int n;
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if (sc == NULL || sc->nfaces <= 0 || fspec == NULL || !*fspec)
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return(0);
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#if POPEN_SUPPORT
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if (fspec[0] == '!') {
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if ((fp = popen(fspec+1, "w")) == NULL) {
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sprintf(errmsg, "%s: cannot execute", fspec);
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error(SYSTEM, errmsg);
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greg |
2.3 |
return(-1);
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greg |
2.1 |
}
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} else
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#endif
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if ((fp = fopen(fspec, "w")) == NULL) {
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sprintf(errmsg, "%s: cannot open for writing", fspec);
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error(SYSTEM, errmsg);
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greg |
2.3 |
return(-1);
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greg |
2.1 |
}
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/* start off header */
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fprintf(fp, "# Radiance scene file converted from .OBJ by %s\n#\n",
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progname);
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n = toRadiance(sc, fp, flreq, flexc); /* write file */
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#if POPEN_SUPPORT
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greg |
2.3 |
if (fspec[0] == '!') {
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if (pclose(fp)) {
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sprintf(errmsg, "%s: error writing to command\n", fspec);
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error(SYSTEM, errmsg);
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return(-1);
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}
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} else
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greg |
2.1 |
#endif
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greg |
2.3 |
fclose(fp); /* close it (already flushed) */
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greg |
2.1 |
return(n);
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}
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