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greg |
3.1 |
#ifndef lint
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greg |
3.3 |
static const char RCSid[] = "$Id: loadbsdf.c,v 3.2 2011/02/19 01:48:59 greg Exp $";
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greg |
3.1 |
#endif
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/*
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* Simple interface for loading BSDF, Radiance-specific search
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*/
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#include "rtio.h"
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#include "rterror.h"
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#include "bsdf.h"
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#include "paths.h"
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/* Convert error from BSDF library */
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char *
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transSDError(SDError ec)
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{
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greg |
3.2 |
if (!SDerrorDetail[0])
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return(strcpy(errmsg, SDerrorEnglish[ec]));
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greg |
3.1 |
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greg |
3.2 |
sprintf(errmsg, "%s: %s", SDerrorEnglish[ec], SDerrorDetail);
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return(errmsg);
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greg |
3.1 |
}
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/* Make sure we're not over 100% scattering for this component */
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static void
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checkDF(const char *nm, double amt, const SDSpectralDF *dfp, const char *desc)
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{
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if (dfp != NULL)
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amt += dfp->maxHemi;
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if (amt <= 1.01)
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return;
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sprintf(errmsg, "BSDF \"%s\" has %.1f%% %s", nm, amt*100., desc);
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error(WARNING, errmsg);
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}
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/* Load a BSDF file and perform some basic checks */
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SDData *
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greg |
3.2 |
loadBSDF(char *fname)
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greg |
3.1 |
{
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greg |
3.2 |
SDData *sd;
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greg |
3.1 |
SDError ec;
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char *pname;
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greg |
3.2 |
sd = SDgetCache(fname); /* look up or allocate */
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greg |
3.1 |
if (sd == NULL)
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error(SYSTEM, "out of memory in loadBSDF");
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greg |
3.2 |
if (SDisLoaded(sd)) /* already in memory? */
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greg |
3.1 |
return(sd);
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greg |
3.2 |
/* else find and load it */
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pname = getpath(fname, getrlibpath(), R_OK);
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greg |
3.1 |
if (pname == NULL) {
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greg |
3.2 |
sprintf(errmsg, "cannot find BSDF file \"%s\"", fname);
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greg |
3.1 |
error(USER, errmsg);
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}
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ec = SDloadFile(sd, pname);
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if (ec)
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error(USER, transSDError(ec));
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/* simple checks */
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greg |
3.2 |
checkDF(sd->name, sd->rLambFront.cieY, sd->rf, "front reflection");
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checkDF(sd->name, sd->rLambBack.cieY, sd->rb, "rear reflection");
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checkDF(sd->name, sd->tLamb.cieY, sd->tf, "transmission");
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greg |
3.3 |
#if 0
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greg |
3.2 |
fprintf(stderr, "Loaded BSDF '%s' (file \"%s\")\n", sd->name, pname);
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fprintf(stderr, "Front diffuse reflectance: %.1f%%\n", sd->rLambFront.cieY*100.);
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fprintf(stderr, "Back diffuse reflectance: %.1f%%\n", sd->rLambBack.cieY*100.);
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fprintf(stderr, "Diffuse transmittance: %.1f%%\n", sd->tLamb.cieY*100.);
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if (sd->rf)
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fprintf(stderr, "Maximum direct hemispherical front reflection: %.1f%%\n",
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sd->rf->maxHemi*100.);
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if (sd->rb)
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fprintf(stderr, "Maximum direct hemispherical back reflection: %.1f%%\n",
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sd->rb->maxHemi*100.);
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if (sd->tf)
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fprintf(stderr, "Maximum direct hemispherical transmission: %.1f%%\n",
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sd->tf->maxHemi*100.);
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greg |
3.3 |
#endif
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greg |
3.1 |
SDretainSet = SDretainAll; /* keep data in core */
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return(sd);
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}
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