1 |
greg |
2.1 |
#ifndef lint |
2 |
|
|
static const char RCSid[] = "$Id: bsdf2ttree.c,v 2.14 2013/03/23 04:14:50 greg Exp $"; |
3 |
|
|
#endif |
4 |
|
|
/* |
5 |
|
|
* Load measured BSDF interpolant and write out as XML file with Klems matrix. |
6 |
|
|
* |
7 |
|
|
* G. Ward |
8 |
|
|
*/ |
9 |
|
|
|
10 |
|
|
#define _USE_MATH_DEFINES |
11 |
|
|
#include <stdio.h> |
12 |
|
|
#include <stdlib.h> |
13 |
|
|
#include <string.h> |
14 |
|
|
#include <math.h> |
15 |
|
|
#include "random.h" |
16 |
|
|
#include "platform.h" |
17 |
|
|
#include "calcomp.h" |
18 |
|
|
#include "bsdfrep.h" |
19 |
|
|
#include "bsdf_m.h" |
20 |
|
|
/* global argv[0] */ |
21 |
|
|
char *progname; |
22 |
|
|
/* selected basis function name */ |
23 |
|
|
static const char *kbasis = "LBNL/Klems Full"; |
24 |
|
|
/* number of BSDF samples per patch */ |
25 |
|
|
static int npsamps = 256; |
26 |
|
|
|
27 |
|
|
/* Return angle basis corresponding to the given name */ |
28 |
|
|
ANGLE_BASIS * |
29 |
|
|
get_basis(const char *bn) |
30 |
|
|
{ |
31 |
|
|
int n = nabases; |
32 |
|
|
|
33 |
|
|
while (n-- > 0) |
34 |
|
|
if (!strcasecmp(bn, abase_list[n].name)) |
35 |
|
|
return &abase_list[n]; |
36 |
|
|
return NULL; |
37 |
|
|
} |
38 |
|
|
|
39 |
|
|
/* Output XML prologue to stdout */ |
40 |
|
|
static void |
41 |
|
|
xml_prologue(int ac, char *av[]) |
42 |
|
|
{ |
43 |
|
|
ANGLE_BASIS *abp = get_basis(kbasis); |
44 |
|
|
int i; |
45 |
|
|
|
46 |
|
|
if (abp == NULL) { |
47 |
|
|
fprintf(stderr, "%s: unknown angle basis '%s'\n", progname, kbasis); |
48 |
|
|
exit(1); |
49 |
|
|
} |
50 |
|
|
puts("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); |
51 |
|
|
puts("<WindowElement xmlns=\"http://windows.lbl.gov\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://windows.lbl.gov/BSDF-v1.4.xsd\">"); |
52 |
|
|
fputs("<!-- File produced by:", stdout); |
53 |
|
|
while (ac-- > 0) { |
54 |
|
|
fputc(' ', stdout); |
55 |
|
|
fputs(*av++, stdout); |
56 |
|
|
} |
57 |
|
|
puts(" -->"); |
58 |
|
|
puts("<WindowElementType>System</WindowElementType>"); |
59 |
|
|
puts("<FileType>BSDF</FileType>"); |
60 |
|
|
puts("<Optical>"); |
61 |
|
|
puts("<Layer>"); |
62 |
|
|
puts("\t<Material>"); |
63 |
|
|
puts("\t\t<Name>Name</Name>"); |
64 |
|
|
puts("\t\t<Manufacturer>Manufacturer</Manufacturer>"); |
65 |
|
|
puts("\t\t<DeviceType>Other</DeviceType>"); |
66 |
|
|
puts("\t</Material>"); |
67 |
|
|
puts("\t<DataDefinition>"); |
68 |
|
|
puts("\t\t<IncidentDataStructure>Columns</IncidentDataStructure>"); |
69 |
|
|
puts("\t\t<AngleBasis>"); |
70 |
|
|
printf("\t\t\t<AngleBasisName>%s</AngleBasisName>\n", kbasis); |
71 |
|
|
for (i = 0; abp->lat[i].nphis; i++) { |
72 |
|
|
puts("\t\t\t<AngleBasisBlock>"); |
73 |
|
|
printf("\t\t\t<Theta>%g</Theta>\n", i ? |
74 |
|
|
.5*(abp->lat[i].tmin + abp->lat[i+1].tmin) : |
75 |
|
|
.0 ); |
76 |
|
|
printf("\t\t\t<nPhis>%d</nPhis>", abp->lat[i].nphis); |
77 |
|
|
puts("\t\t\t<ThetaBounds>"); |
78 |
|
|
printf("\t\t\t\t<LowerTheta>%g</LowerTheta>\n", abp->lat[i].tmin); |
79 |
|
|
printf("\t\t\t\t<UpperTheta>%g</UpperTheta>\n", abp->lat[i+1].tmin); |
80 |
|
|
puts("\t\t\t</ThetaBounds>"); |
81 |
|
|
puts("\t\t\t</AngleBasisBlock>"); |
82 |
|
|
} |
83 |
|
|
puts("\t\t</AngleBasis>"); |
84 |
|
|
puts("\t</DataDefinition>"); |
85 |
|
|
} |
86 |
|
|
|
87 |
|
|
/* Output XML data prologue to stdout */ |
88 |
|
|
static void |
89 |
|
|
data_prologue() |
90 |
|
|
{ |
91 |
|
|
static const char *bsdf_type[4] = { |
92 |
|
|
"Reflection Front", |
93 |
|
|
"Transmission Front", |
94 |
|
|
"Transmission Back", |
95 |
|
|
"Reflection Back" |
96 |
|
|
}; |
97 |
|
|
|
98 |
|
|
puts("\t<WavelengthData>"); |
99 |
|
|
puts("\t\t<LayerNumber>System</LayerNumber>"); |
100 |
|
|
puts("\t\t<Wavelength unit=\"Integral\">Visible</Wavelength>"); |
101 |
|
|
puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>"); |
102 |
|
|
puts("\t\t<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum>"); |
103 |
|
|
puts("\t\t<WavelengthDataBlock>"); |
104 |
|
|
printf("\t\t\t<WavelengthDataDirection>%s</WavelengthDataDirection>\n", |
105 |
|
|
bsdf_type[(input_orient>0)<<1 | (output_orient>0)]); |
106 |
|
|
printf("\t\t\t<ColumnAngleBasis>%s</ColumnAngleBasis>\n", kbasis); |
107 |
|
|
printf("\t\t\t<RowAngleBasis>%s</RowAngleBasis>\n", kbasis); |
108 |
|
|
puts("\t\t\t<ScatteringDataType>BTDF</ScatteringDataType>"); |
109 |
|
|
puts("\t\t\t<ScatteringData>"); |
110 |
|
|
} |
111 |
|
|
|
112 |
|
|
/* Output XML data epilogue to stdout */ |
113 |
|
|
static void |
114 |
|
|
data_epilogue(void) |
115 |
|
|
{ |
116 |
|
|
puts("\t\t\t</ScatteringData>"); |
117 |
|
|
puts("\t\t</WavelengthDataBlock>"); |
118 |
|
|
puts("\t</WavelengthData>"); |
119 |
|
|
} |
120 |
|
|
|
121 |
|
|
/* Output XML epilogue to stdout */ |
122 |
|
|
static void |
123 |
|
|
xml_epilogue(void) |
124 |
|
|
{ |
125 |
|
|
puts("</Layer>"); |
126 |
|
|
puts("</Optical>"); |
127 |
|
|
puts("</WindowElement>"); |
128 |
|
|
} |
129 |
|
|
|
130 |
|
|
/* Load and resample XML BSDF description */ |
131 |
|
|
static void |
132 |
|
|
eval_bsdf(const char *fname) |
133 |
|
|
{ |
134 |
|
|
ANGLE_BASIS *abp = get_basis(kbasis); |
135 |
|
|
SDData bsd; |
136 |
|
|
SDError ec; |
137 |
|
|
FVECT vin, vout; |
138 |
|
|
SDValue sv; |
139 |
|
|
double sum; |
140 |
|
|
int i, j, n; |
141 |
|
|
|
142 |
|
|
SDclearBSDF(&bsd, fname); /* load BSDF file */ |
143 |
|
|
if ((ec = SDloadFile(&bsd, fname)) != SDEnone) |
144 |
|
|
goto err; |
145 |
|
|
/* front reflection */ |
146 |
|
|
if (bsd.rf != NULL || bsd.rLambFront.cieY > .002) { |
147 |
|
|
input_orient = 1; output_orient = 1; |
148 |
|
|
data_prologue(); |
149 |
|
|
for (j = 0; j < abp->nangles; j++) { |
150 |
|
|
for (i = 0; i < abp->nangles; i++) { |
151 |
|
|
sum = 0; /* average over patches */ |
152 |
|
|
for (n = npsamps; n-- > 0; ) { |
153 |
|
|
fo_getvec(vout, j+(n+frandom())/npsamps, abp); |
154 |
|
|
fi_getvec(vin, i+(n+frandom())/npsamps, abp); |
155 |
|
|
ec = SDevalBSDF(&sv, vout, vin, &bsd); |
156 |
|
|
if (ec != SDEnone) |
157 |
|
|
goto err; |
158 |
|
|
sum += sv.cieY; |
159 |
|
|
} |
160 |
|
|
printf("\t%.3e\n", sum/npsamps); |
161 |
|
|
} |
162 |
|
|
putchar('\n'); /* extra space between rows */ |
163 |
|
|
} |
164 |
|
|
data_epilogue(); |
165 |
|
|
} |
166 |
|
|
/* back reflection */ |
167 |
|
|
if (bsd.rb != NULL || bsd.rLambBack.cieY > .002) { |
168 |
|
|
input_orient = -1; output_orient = -1; |
169 |
|
|
data_prologue(); |
170 |
|
|
for (j = 0; j < abp->nangles; j++) { |
171 |
|
|
for (i = 0; i < abp->nangles; i++) { |
172 |
|
|
sum = 0; /* average over patches */ |
173 |
|
|
for (n = npsamps; n-- > 0; ) { |
174 |
|
|
bo_getvec(vout, j+(n+frandom())/npsamps, abp); |
175 |
|
|
bi_getvec(vin, i+(n+frandom())/npsamps, abp); |
176 |
|
|
ec = SDevalBSDF(&sv, vout, vin, &bsd); |
177 |
|
|
if (ec != SDEnone) |
178 |
|
|
goto err; |
179 |
|
|
sum += sv.cieY; |
180 |
|
|
} |
181 |
|
|
printf("\t%.3e\n", sum/npsamps); |
182 |
|
|
} |
183 |
|
|
putchar('\n'); /* extra space between rows */ |
184 |
|
|
} |
185 |
|
|
data_epilogue(); |
186 |
|
|
} |
187 |
|
|
/* front transmission */ |
188 |
|
|
if (bsd.tf != NULL || bsd.tLamb.cieY > .002) { |
189 |
|
|
input_orient = 1; output_orient = -1; |
190 |
|
|
data_prologue(); |
191 |
|
|
for (j = 0; j < abp->nangles; j++) { |
192 |
|
|
for (i = 0; i < abp->nangles; i++) { |
193 |
|
|
sum = 0; /* average over patches */ |
194 |
|
|
for (n = npsamps; n-- > 0; ) { |
195 |
|
|
bo_getvec(vout, j+(n+frandom())/npsamps, abp); |
196 |
|
|
fi_getvec(vin, i+(n+frandom())/npsamps, abp); |
197 |
|
|
ec = SDevalBSDF(&sv, vout, vin, &bsd); |
198 |
|
|
if (ec != SDEnone) |
199 |
|
|
goto err; |
200 |
|
|
sum += sv.cieY; |
201 |
|
|
} |
202 |
|
|
printf("\t%.3e\n", sum/npsamps); |
203 |
|
|
} |
204 |
|
|
putchar('\n'); /* extra space between rows */ |
205 |
|
|
} |
206 |
|
|
data_epilogue(); |
207 |
|
|
} |
208 |
|
|
/* back transmission */ |
209 |
|
|
if (bsd.tb != NULL) { |
210 |
|
|
input_orient = -1; output_orient = 1; |
211 |
|
|
data_prologue(); |
212 |
|
|
for (j = 0; j < abp->nangles; j++) { |
213 |
|
|
for (i = 0; i < abp->nangles; i++) { |
214 |
|
|
sum = 0; /* average over patches */ |
215 |
|
|
for (n = npsamps; n-- > 0; ) { |
216 |
|
|
fo_getvec(vout, j+(n+frandom())/npsamps, abp); |
217 |
|
|
bi_getvec(vin, i+(n+frandom())/npsamps, abp); |
218 |
|
|
ec = SDevalBSDF(&sv, vout, vin, &bsd); |
219 |
|
|
if (ec != SDEnone) |
220 |
|
|
goto err; |
221 |
|
|
sum += sv.cieY; |
222 |
|
|
} |
223 |
|
|
printf("\t%.3e\n", sum/npsamps); |
224 |
|
|
} |
225 |
|
|
putchar('\n'); /* extra space between rows */ |
226 |
|
|
} |
227 |
|
|
data_epilogue(); |
228 |
|
|
} |
229 |
|
|
SDfreeBSDF(&bsd); /* all done */ |
230 |
|
|
return; |
231 |
|
|
err: |
232 |
|
|
SDreportError(ec, stderr); |
233 |
|
|
exit(1); |
234 |
|
|
} |
235 |
|
|
|
236 |
|
|
/* Interpolate and output a BSDF function */ |
237 |
|
|
static void |
238 |
|
|
eval_function(char *funame) |
239 |
|
|
{ |
240 |
|
|
ANGLE_BASIS *abp = get_basis(kbasis); |
241 |
|
|
double iovec[6]; |
242 |
|
|
double sum; |
243 |
|
|
int i, j, n; |
244 |
|
|
|
245 |
|
|
data_prologue(); /* begin output */ |
246 |
|
|
for (j = 0; j < abp->nangles; j++) { /* run through directions */ |
247 |
|
|
for (i = 0; i < abp->nangles; i++) { |
248 |
|
|
sum = 0; |
249 |
|
|
for (n = npsamps; n--; ) { /* average over patches */ |
250 |
|
|
if (output_orient > 0) |
251 |
|
|
fo_getvec(iovec+3, j+(n+frandom())/npsamps, abp); |
252 |
|
|
else |
253 |
|
|
bo_getvec(iovec+3, j+(n+frandom())/npsamps, abp); |
254 |
|
|
|
255 |
|
|
if (input_orient > 0) |
256 |
|
|
fi_getvec(iovec, j+(n+frandom())/npsamps, abp); |
257 |
|
|
else |
258 |
|
|
bi_getvec(iovec, j+(n+frandom())/npsamps, abp); |
259 |
|
|
|
260 |
|
|
sum += funvalue(funame, 6, iovec); |
261 |
|
|
} |
262 |
|
|
printf("\t%.3e\n", sum/npsamps); |
263 |
|
|
} |
264 |
|
|
putchar('\n'); |
265 |
|
|
} |
266 |
|
|
data_epilogue(); /* finish output */ |
267 |
|
|
} |
268 |
|
|
|
269 |
|
|
/* Interpolate and output a radial basis function BSDF representation */ |
270 |
|
|
static void |
271 |
|
|
eval_rbf(void) |
272 |
|
|
{ |
273 |
|
|
ANGLE_BASIS *abp = get_basis(kbasis); |
274 |
|
|
double iovec[6]; |
275 |
|
|
double sum; |
276 |
|
|
int i, j, n; |
277 |
|
|
|
278 |
|
|
fprintf(stder, "%s: RBF evaluation currently unimplemented\n", progname); |
279 |
|
|
exit(1); |
280 |
|
|
} |
281 |
|
|
|
282 |
|
|
/* Read in BSDF and interpolate as Klems matrix representation */ |
283 |
|
|
int |
284 |
|
|
main(int argc, char *argv[]) |
285 |
|
|
{ |
286 |
|
|
int dofwd = 0, dobwd = 1; |
287 |
|
|
char *cp; |
288 |
|
|
int i, na; |
289 |
|
|
|
290 |
|
|
progname = argv[0]; |
291 |
|
|
esupport |= E_VARIABLE|E_FUNCTION|E_RCONST; |
292 |
|
|
esupport &= ~(E_INCHAN|E_OUTCHAN); |
293 |
|
|
scompile("PI:3.14159265358979323846", NULL, 0); |
294 |
|
|
biggerlib(); |
295 |
|
|
for (i = 1; i < argc-1 && (argv[i][0] == '-') | (argv[i][0] == '+'); i++) |
296 |
|
|
switch (argv[i][1]) { /* get options */ |
297 |
|
|
case 'n': |
298 |
|
|
npsamps = atoi(argv[++i]); |
299 |
|
|
if (npsamps <= 0) |
300 |
|
|
goto userr; |
301 |
|
|
break; |
302 |
|
|
case 'e': |
303 |
|
|
scompile(argv[++i], NULL, 0); |
304 |
|
|
single_plane_incident = 0; |
305 |
|
|
break; |
306 |
|
|
case 'f': |
307 |
|
|
if (!argv[i][2]) { |
308 |
|
|
fcompile(argv[++i]); |
309 |
|
|
single_plane_incident = 0; |
310 |
|
|
} else |
311 |
|
|
dofwd = (argv[i][0] == '+'); |
312 |
|
|
break; |
313 |
|
|
case 'b': |
314 |
|
|
dobwd = (argv[i][0] == '+'); |
315 |
|
|
break; |
316 |
|
|
case 'h': |
317 |
|
|
kbasis = "LBNL/Klems Half"; |
318 |
|
|
break; |
319 |
|
|
case 'q': |
320 |
|
|
kbasis = "LBNL/Klems Quarter"; |
321 |
|
|
break; |
322 |
|
|
default: |
323 |
|
|
goto userr; |
324 |
|
|
} |
325 |
|
|
if (single_plane_incident >= 0) { /* function-based BSDF? */ |
326 |
|
|
if (i != argc-1 || fundefined(argv[i]) != 6) { |
327 |
|
|
fprintf(stderr, |
328 |
|
|
"%s: need single function with 6 arguments: bsdf(ix,iy,iz,ox,oy,oz)\n", |
329 |
|
|
progname); |
330 |
|
|
goto userr; |
331 |
|
|
} |
332 |
|
|
xml_prologue(argc, argv); /* start XML output */ |
333 |
|
|
if (dofwd) { |
334 |
|
|
input_orient = -1; |
335 |
|
|
output_orient = -1; |
336 |
|
|
eval_function(argv[i]); /* outside reflectance */ |
337 |
|
|
output_orient = 1; |
338 |
|
|
eval_function(argv[i]); /* outside -> inside */ |
339 |
|
|
} |
340 |
|
|
if (dobwd) { |
341 |
|
|
input_orient = 1; |
342 |
|
|
output_orient = 1; |
343 |
|
|
eval_function(argv[i]); /* inside reflectance */ |
344 |
|
|
output_orient = -1; |
345 |
|
|
eval_function(argv[i]); /* inside -> outside */ |
346 |
|
|
} |
347 |
|
|
xml_epilogue(); /* finish XML output & exit */ |
348 |
|
|
return(0); |
349 |
|
|
} |
350 |
|
|
if (i == argc-1 && (cp = strstr(argv[i], ".xml")) != NULL && |
351 |
|
|
strlen(cp) == 4) { /* XML input? */ |
352 |
|
|
xml_prologue(argc, argv); /* start XML output */ |
353 |
|
|
eval_bsdf(argv[i]); /* load & resample BSDF */ |
354 |
|
|
xml_epilogue(); /* finish XML output & exit */ |
355 |
|
|
return(0); |
356 |
|
|
} |
357 |
|
|
if (i < argc) { /* open input files if given */ |
358 |
|
|
int nbsdf = 0; |
359 |
|
|
for ( ; i < argc; i++) { /* interpolate each component */ |
360 |
|
|
FILE *fpin = fopen(argv[i], "rb"); |
361 |
|
|
if (fpin == NULL) { |
362 |
|
|
fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n", |
363 |
|
|
progname, argv[i]); |
364 |
|
|
return(1); |
365 |
|
|
} |
366 |
|
|
if (!load_bsdf_rep(fpin)) |
367 |
|
|
return(1); |
368 |
|
|
fclose(fpin); |
369 |
|
|
if (!nbsdf++) /* start XML on first dist. */ |
370 |
|
|
xml_prologue(argc, argv); |
371 |
|
|
eval_rbf(); |
372 |
|
|
} |
373 |
|
|
xml_epilogue(); /* finish XML output & exit */ |
374 |
|
|
return(0); |
375 |
|
|
} |
376 |
|
|
SET_FILE_BINARY(stdin); /* load from stdin */ |
377 |
|
|
if (!load_bsdf_rep(stdin)) |
378 |
|
|
return(1); |
379 |
|
|
xml_prologue(argc, argv); /* start XML output */ |
380 |
|
|
eval_rbf(); /* resample dist. */ |
381 |
|
|
xml_epilogue(); /* finish XML output & exit */ |
382 |
|
|
return(0); |
383 |
|
|
userr: |
384 |
|
|
fprintf(stderr, |
385 |
|
|
"Usage: %s [-n spp][-h|-q][bsdf.sir ..] > bsdf.xml\n", |
386 |
|
|
progname); |
387 |
|
|
fprintf(stderr, |
388 |
|
|
" or: %s [-n spp][-h|-q] bsdf_in.xml > bsdf_out.xml\n", |
389 |
|
|
progname); |
390 |
|
|
fprintf(stderr, |
391 |
|
|
" or: %s [-n spp][-h|-q][{+|-}for[ward]][{+|-}b[ackward]][-e expr][-f file] bsdf_func > bsdf.xml\n", |
392 |
|
|
progname); |
393 |
|
|
return(1); |
394 |
|
|
} |