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#ifndef lint |
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static const char RCSid[] = "$Id: convertobj.c,v 2.2 2020/04/23 03:19:48 greg Exp $"; |
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#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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|
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#include "paths.h" |
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#include "rterror.h" |
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#include "objutil.h" |
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|
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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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|
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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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|
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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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|
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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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error(SYSTEM, "Error writing Radiance scene data"); |
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return(-1); |
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} |
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return(n); |
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} |
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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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|
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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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return(-1); |
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} |
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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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return(-1); |
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} |
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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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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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#endif |
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fclose(fp); /* close it (already flushed) */ |
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return(n); |
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} |
