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#ifndef lint |
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static const char RCSid[] = "$Id: loadbsdf.c,v 3.4 2011/04/27 23:05:51 greg Exp $"; |
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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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|
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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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|
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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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if (!SDerrorDetail[0]) |
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return(strcpy(errmsg, SDerrorEnglish[ec])); |
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|
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sprintf(errmsg, "%s: %s", SDerrorEnglish[ec], SDerrorDetail); |
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return(errmsg); |
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} |
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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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|
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/* Load a BSDF file and perform some basic checks */ |
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SDData * |
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loadBSDF(char *fname) |
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{ |
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SDData *sd; |
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SDError ec; |
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char *pname; |
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|
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sd = SDgetCache(fname); /* look up or allocate */ |
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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)) /* already in memory? */ |
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return(sd); |
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/* else find and load it */ |
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pname = getpath(fname, getrlibpath(), R_OK); |
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if (pname == NULL) { |
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sprintf(errmsg, "cannot find BSDF file \"%s\"", fname); |
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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(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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#if 0 |
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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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#endif |
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SDretainSet = SDretainAll; /* keep data in core */ |
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return(sd); |
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} |
