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#ifndef lint
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static const char RCSid[] = "$Id$";
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#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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static char mymess[128];
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if (!SDerrorDetail[0])
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return(strcpy(mymess, SDerrorEnglish[ec]));
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sprintf(mymess, "%s: %s", SDerrorEnglish[ec], SDerrorDetail);
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return(mymess);
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}
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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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loadBSDF(char *name)
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{
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SDData *sd = SDgetCache(name);
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SDError ec;
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char *pname;
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if (sd == NULL)
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error(SYSTEM, "out of memory in loadBSDF");
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if (SDisLoaded(sd))
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return(sd);
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pname = getpath(name, getrlibpath(), R_OK);
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if (pname == NULL) {
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sprintf(errmsg, "cannot find BSDF file \"%s\"", name);
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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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checkDF(name, sd->rLambFront.cieY, sd->rf, "front reflection");
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checkDF(name, sd->rLambBack.cieY, sd->rb, "rear reflection");
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checkDF(name, sd->tLamb.cieY, sd->tf, "transmission");
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SDretainSet = SDretainAll; /* keep data in core */
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return(sd);
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}
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