| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: loadbsdf.c,v 3.13 2021/03/27 17:50:18 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Simple interface for loading BSDF, Radiance-specific search |
| 6 |
*/ |
| 7 |
|
| 8 |
#include "rtio.h" |
| 9 |
#include "rterror.h" |
| 10 |
#include "bsdf.h" |
| 11 |
#include "paths.h" |
| 12 |
|
| 13 |
/* Convert error from BSDF library */ |
| 14 |
char * |
| 15 |
transSDError(SDError ec) |
| 16 |
{ |
| 17 |
if (!SDerrorDetail[0]) |
| 18 |
return(strcpy(errmsg, SDerrorList[ec])); |
| 19 |
|
| 20 |
sprintf(errmsg, "%s: %s", SDerrorList[ec], SDerrorDetail); |
| 21 |
return(errmsg); |
| 22 |
} |
| 23 |
|
| 24 |
/* Make sure we're not over 100% scattering for this component */ |
| 25 |
static void |
| 26 |
checkDF(const char *nm, double amt, const SDSpectralDF *dfp, const char *desc) |
| 27 |
{ |
| 28 |
if (dfp != NULL) |
| 29 |
amt += dfp->maxHemi; |
| 30 |
if (amt <= 1.01) |
| 31 |
return; |
| 32 |
sprintf(errmsg, "BSDF \"%s\" has %.1f%% %s", nm, amt*100., desc); |
| 33 |
error(WARNING, errmsg); |
| 34 |
} |
| 35 |
|
| 36 |
/* Load a BSDF file and perform some basic checks */ |
| 37 |
SDData * |
| 38 |
loadBSDF(char *fname) |
| 39 |
{ |
| 40 |
SDData *sd; |
| 41 |
SDError ec; |
| 42 |
char *pname; |
| 43 |
|
| 44 |
sd = SDgetCache(fname); /* look up or allocate */ |
| 45 |
if (sd == NULL) |
| 46 |
error(SYSTEM, "out of memory in loadBSDF"); |
| 47 |
if (SDisLoaded(sd)) /* already in memory? */ |
| 48 |
return(sd); |
| 49 |
/* else find and load it */ |
| 50 |
pname = getpath(fname, getrlibpath(), R_OK); |
| 51 |
if (pname == NULL) { |
| 52 |
sprintf(errmsg, "cannot find BSDF file \"%s\"", fname); |
| 53 |
error(SYSTEM, errmsg); |
| 54 |
} |
| 55 |
ec = SDloadFile(sd, pname); |
| 56 |
if (ec) |
| 57 |
error(USER, transSDError(ec)); |
| 58 |
/* simple checks */ |
| 59 |
checkDF(sd->name, sd->rLambFront.cieY, sd->rf, "front reflection"); |
| 60 |
checkDF(sd->name, sd->rLambBack.cieY, sd->rb, "rear reflection"); |
| 61 |
checkDF(sd->name, sd->tLambFront.cieY, sd->tf, "front transmission"); |
| 62 |
checkDF(sd->name, sd->tLambBack.cieY, sd->tb, "back transmission"); |
| 63 |
#ifdef DEBUG |
| 64 |
{ |
| 65 |
float rgb[3]; |
| 66 |
fprintf(stderr, "Loaded BSDF '%s' (file \"%s\")\n", sd->name, pname); |
| 67 |
ccy2rgb(&sd->rLambFront.spec, sd->rLambFront.cieY, rgb); |
| 68 |
fprintf(stderr, "Front diffuse RGB: %.4f %.4f %.4f\n", rgb[0], rgb[1], rgb[2]); |
| 69 |
ccy2rgb(&sd->rLambBack.spec, sd->rLambBack.cieY, rgb); |
| 70 |
fprintf(stderr, "Back diffuse RGB: %.4f %.4f %.4f\n", rgb[0], rgb[1], rgb[2]); |
| 71 |
ccy2rgb(&sd->tLambFront.spec, sd->tLamb.cieY, rgb); |
| 72 |
fprintf(stderr, "Front diffuse RGB transmittance: %.4f %.4f %.4f\n", rgb[0], rgb[1], rgb[2]); |
| 73 |
ccy2rgb(&sd->tLambBack.spec, sd->tLamb.cieY, rgb); |
| 74 |
fprintf(stderr, "Back diffuse RGB transmittance: %.4f %.4f %.4f\n", rgb[0], rgb[1], rgb[2]); |
| 75 |
if (sd->rf) |
| 76 |
fprintf(stderr, "Maximum direct hemispherical front reflection (less diffuse): %.3f%%\n", |
| 77 |
sd->rf->maxHemi*100.); |
| 78 |
if (sd->rb) |
| 79 |
fprintf(stderr, "Maximum direct hemispherical back reflection (less diffuse): %.3f%%\n", |
| 80 |
sd->rb->maxHemi*100.); |
| 81 |
if (sd->tf) |
| 82 |
fprintf(stderr, "Maximum direct hemispherical front transmission (less diffuse): %.3f%%\n", |
| 83 |
sd->tf->maxHemi*100.); |
| 84 |
if (sd->tb) |
| 85 |
fprintf(stderr, "Maximum direct hemispherical back transmission (less diffuse): %.3f%%\n", |
| 86 |
sd->tb->maxHemi*100.); |
| 87 |
} |
| 88 |
#endif |
| 89 |
SDretainSet = SDretainAll; /* keep data in core */ |
| 90 |
#ifdef SMLMEM |
| 91 |
SDmaxCache = 5L*1024*1024; |
| 92 |
#else |
| 93 |
SDmaxCache = 250L*1024*1024; |
| 94 |
#endif |
| 95 |
return(sd); |
| 96 |
} |
