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root/radiance/ray/src/cv/bsdf2ttree.c
Revision: 2.60
Committed: Tue Sep 12 16:40:57 2023 UTC (7 months, 3 weeks ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad5R4
Changes since 2.59: +2 -2 lines
Log Message: 
perf(bsdf2ttree): BREAKING CHANGE - changed reciprocity averaging default from "on" (+a) to "off" (-a)

File Contents

# User Rev Content
1 greg 2.1 #ifndef lint
2 greg 2.60 static const char RCSid[] = "$Id: bsdf2ttree.c,v 2.59 2023/07/26 15:50:03 greg Exp $";
3 greg 2.1 #endif
4     /*
5     * Load measured BSDF interpolant and write out as XML file with tensor tree.
6     *
7     * G. Ward
8     */
9    
10     #define _USE_MATH_DEFINES
11     #include <stdlib.h>
12     #include <math.h>
13 greg 2.53 #include <ctype.h>
14 greg 2.23 #include "random.h"
15 greg 2.1 #include "platform.h"
16 greg 2.34 #include "paths.h"
17     #include "rtio.h"
18 greg 2.11 #include "calcomp.h"
19 greg 2.1 #include "bsdfrep.h"
20     /* global argv[0] */
21     char *progname;
22 greg 2.41 /* reciprocity averaging option */
23 greg 2.60 static const char *recip = "";
24 greg 2.1 /* percentage to cull (<0 to turn off) */
25 greg 2.31 static double pctcull = 90.;
26 greg 2.1 /* sampling order */
27 greg 2.31 static int samp_order = 6;
28 greg 2.15 /* super-sampling threshold */
29 greg 2.48 static double ssamp_thresh = 0.35;
30 greg 2.15 /* number of super-samples */
31 greg 2.52 static int nssamp = 256;
32 greg 2.18 /* limit on number of RBF lobes */
33     static int lobe_lim = 15000;
34 greg 2.26 /* progress bar length */
35     static int do_prog = 79;
36    
37 greg 2.34 #define MAXCARG 512 /* wrapBSDF command */
38     static char *wrapBSDF[MAXCARG] = {"wrapBSDF", "-U"};
39     static int wbsdfac = 2;
40    
41 greg 2.39 /* Add argument to wrapBSDF, allocating space if !isstatic */
42 greg 2.34 static void
43     add_wbsdf(const char *arg, int isstatic)
44     {
45     if (arg == NULL)
46     return;
47     if (wbsdfac >= MAXCARG-1) {
48     fputs(progname, stderr);
49     fputs(": too many command arguments to wrapBSDF\n", stderr);
50     exit(1);
51     }
52     if (!*arg)
53     arg = "";
54     else if (!isstatic)
55     arg = savqstr((char *)arg);
56    
57     wrapBSDF[wbsdfac++] = (char *)arg;
58     }
59    
60     /* Create Yuv component file and add appropriate arguments */
61     static char *
62     create_component_file(int c)
63     {
64     static const char sname[3][6] = {"CIE-Y", "CIE-u", "CIE-v"};
65     static const char cname[4][4] = {"-rf", "-tf", "-tb", "-rb"};
66     char *tfname = mktemp(savqstr(TEMPLATE));
67    
68     add_wbsdf("-s", 1); add_wbsdf(sname[c], 1);
69     add_wbsdf(cname[(input_orient>0)<<1 | (output_orient>0)], 1);
70     add_wbsdf(tfname, 1);
71     return(tfname);
72     }
73 greg 2.26
74     /* Start new progress bar */
75     #define prog_start(s) if (do_prog) fprintf(stderr, "%s: %s...\n", progname, s); else
76    
77     /* Draw progress bar of the appropriate length */
78     static void
79     prog_show(double frac)
80     {
81 greg 2.30 static unsigned call_cnt = 0;
82     static char lastc[] = "-\\|/";
83     char pbar[256];
84     int nchars;
85 greg 2.26
86 greg 2.30 if (do_prog <= 1) return;
87 greg 2.26 if (do_prog > sizeof(pbar)-2)
88     do_prog = sizeof(pbar)-2;
89     if (frac < 0) frac = 0;
90 greg 2.30 else if (frac >= 1) frac = .9999;
91     nchars = do_prog*frac;
92 greg 2.26 pbar[0] = '\r';
93     memset(pbar+1, '*', nchars);
94 greg 2.30 pbar[nchars+1] = lastc[call_cnt++ & 3];
95     memset(pbar+2+nchars, '-', do_prog-nchars-1);
96 greg 2.26 pbar[do_prog+1] = '\0';
97     fputs(pbar, stderr);
98     }
99    
100     /* Finish progress bar */
101 greg 2.27 static void
102     prog_done(void)
103     {
104     int n = do_prog;
105    
106     if (n <= 1) return;
107     fputc('\r', stderr);
108     while (n--)
109     fputc(' ', stderr);
110     fputc('\r', stderr);
111     }
112 greg 2.1
113 greg 2.15 /* Compute absolute relative difference */
114     static double
115     abs_diff(double v1, double v0)
116     {
117     if ((v0 < 0) | (v1 < 0))
118     return(.0);
119     v1 = (v1-v0)*2./(v0+v1+.0001);
120     if (v1 < 0)
121     return(-v1);
122     return(v1);
123     }
124    
125 greg 2.1 /* Interpolate and output isotropic BSDF data */
126     static void
127 greg 2.11 eval_isotropic(char *funame)
128 greg 2.1 {
129     const int sqres = 1<<samp_order;
130 greg 2.42 const double sqfact = 1./(double)sqres;
131 greg 2.50 float *val_last = NULL;
132     float *val_next = NULL;
133     SDValue *sdv_next = NULL;
134 greg 2.34 FILE *ofp, *uvfp[2];
135 greg 2.17 int assignD = 0;
136 greg 2.1 char cmd[128];
137     int ix, ox, oy;
138 greg 2.58 RREAL iovec[6];
139 greg 2.34 float bsdf, uv[2];
140 greg 2.15
141 greg 2.11 if (pctcull >= 0) {
142 greg 2.41 sprintf(cmd, "rttree_reduce%s -h -ff -r 3 -t %f -g %d > %s",
143     recip, pctcull, samp_order, create_component_file(0));
144 greg 2.1 ofp = popen(cmd, "w");
145     if (ofp == NULL) {
146     fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n",
147     progname);
148     exit(1);
149     }
150     SET_FILE_BINARY(ofp);
151 greg 2.25 #ifdef getc_unlocked /* avoid lock/unlock overhead */
152     flockfile(ofp);
153     #endif
154 greg 2.34 if (rbf_colorimetry == RBCtristimulus) {
155     double uvcull = 100. - (100.-pctcull)*.25;
156 greg 2.41 sprintf(cmd, "rttree_reduce%s -h -ff -r 3 -t %f -g %d > %s",
157     recip, uvcull, samp_order, create_component_file(1));
158 greg 2.34 uvfp[0] = popen(cmd, "w");
159 greg 2.41 sprintf(cmd, "rttree_reduce%s -h -ff -r 3 -t %f -g %d > %s",
160     recip, uvcull, samp_order, create_component_file(2));
161 greg 2.34 uvfp[1] = popen(cmd, "w");
162     if ((uvfp[0] == NULL) | (uvfp[1] == NULL)) {
163     fprintf(stderr, "%s: cannot open pipes to uv output\n",
164     progname);
165     exit(1);
166     }
167     SET_FILE_BINARY(uvfp[0]); SET_FILE_BINARY(uvfp[1]);
168     #ifdef getc_unlocked
169     flockfile(uvfp[0]); flockfile(uvfp[1]);
170     #endif
171     }
172     } else {
173     ofp = fopen(create_component_file(0), "w");
174     if (ofp == NULL) {
175     fprintf(stderr, "%s: cannot create Y output file\n",
176     progname);
177     exit(1);
178     }
179     fputs("{\n", ofp);
180     if (rbf_colorimetry == RBCtristimulus) {
181     uvfp[0] = fopen(create_component_file(1), "w");
182     uvfp[1] = fopen(create_component_file(2), "w");
183     if ((uvfp[0] == NULL) | (uvfp[1] == NULL)) {
184     fprintf(stderr, "%s: cannot create uv output file(s)\n",
185     progname);
186     exit(1);
187     }
188     fputs("{\n", uvfp[0]);
189     fputs("{\n", uvfp[1]);
190     }
191     }
192 greg 2.35 if (funame != NULL) /* need to assign Dx, Dy, Dz? */
193 greg 2.17 assignD = (fundefined(funame) < 6);
194 greg 2.50 val_last = (float *)calloc(sqres, sizeof(float));
195     if (funame == NULL)
196     sdv_next = (SDValue *)malloc(sizeof(SDValue)*sqres);
197     else
198     val_next = (float *)malloc(sizeof(float)*sqres);
199 greg 2.1 /* run through directions */
200     for (ix = 0; ix < sqres/2; ix++) {
201 greg 2.45 const int zipsgn = (ix & 1)*2 - 1;
202     RBFNODE *rbf = NULL;
203 greg 2.42 iovec[0] = 2.*sqfact*(ix+.5) - 1.;
204 greg 2.45 iovec[1] = zipsgn*sqfact*.5;
205     iovec[2] = input_orient * sqrt(1. - iovec[0]*iovec[0]
206     - iovec[1]*iovec[1]);
207 greg 2.11 if (funame == NULL)
208 greg 2.18 rbf = advect_rbf(iovec, lobe_lim);
209 greg 2.50 /* presample first row */
210     for (oy = 0; oy < sqres; oy++) {
211 greg 2.58 square2disk(iovec+3, .5*sqfact, (oy+.5)*sqfact);
212 greg 2.47 iovec[5] = output_orient *
213     sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
214     if (funame == NULL) {
215 greg 2.50 eval_rbfcol(&sdv_next[oy], rbf, iovec+3);
216 greg 2.47 } else {
217     if (assignD) {
218     varset("Dx", '=', -iovec[3]);
219     varset("Dy", '=', -iovec[4]);
220     varset("Dz", '=', -iovec[5]);
221     ++eclock;
222     }
223 greg 2.50 val_next[oy] = funvalue(funame, 6, iovec);
224 greg 2.47 }
225 greg 2.50 }
226     for (ox = 0; ox < sqres; ox++) {
227 greg 2.49 /*
228     * Super-sample when we detect a difference from before
229 greg 2.50 * or after in this row, above or below.
230 greg 2.49 */
231 greg 2.1 for (oy = 0; oy < sqres; oy++) {
232 greg 2.50 if (ox < sqres-1) { /* keeping one row ahead... */
233 greg 2.58 square2disk(iovec+3, (ox+1.5)*sqfact, (oy+.5)*sqfact);
234 greg 2.47 iovec[5] = output_orient *
235 greg 2.11 sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
236 greg 2.47 }
237 greg 2.34 if (funame == NULL) {
238 greg 2.50 SDValue sdv = sdv_next[oy];
239     bsdf = sdv.cieY;
240     if (ox < sqres-1)
241     eval_rbfcol(&sdv_next[oy], rbf, iovec+3);
242     if (abs_diff(bsdf, sdv_next[oy].cieY) > ssamp_thresh ||
243     (ox && abs_diff(bsdf, val_last[oy]) > ssamp_thresh) ||
244     (oy && abs_diff(bsdf, val_last[oy-1]) > ssamp_thresh) ||
245     (oy < sqres-1 &&
246     abs_diff(bsdf, sdv_next[oy+1].cieY) > ssamp_thresh)) {
247 greg 2.42 int ssi;
248     double ssa[2], sum = 0, usum = 0, vsum = 0;
249     /* super-sample voxel */
250 greg 2.52 for (ssi = nssamp; ssi--; ) {
251     SDmultiSamp(ssa, 2, (ssi+frandom()) /
252     (double)nssamp);
253 greg 2.58 square2disk(iovec+3, (ox+ssa[0])*sqfact,
254 greg 2.42 (oy+ssa[1])*sqfact);
255     iovec[5] = output_orient *
256     sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
257     eval_rbfcol(&sdv, rbf, iovec+3);
258     sum += sdv.cieY;
259     if (rbf_colorimetry == RBCtristimulus) {
260     sdv.cieY /=
261     -2.*sdv.spec.cx + 12.*sdv.spec.cy + 3.;
262     usum += 4.*sdv.spec.cx * sdv.cieY;
263     vsum += 9.*sdv.spec.cy * sdv.cieY;
264     }
265     }
266 greg 2.52 bsdf = sum / (double)nssamp;
267 greg 2.42 if (rbf_colorimetry == RBCtristimulus) {
268     uv[0] = usum / (sum+FTINY);
269     uv[1] = vsum / (sum+FTINY);
270     }
271 greg 2.57 } else if (rbf_colorimetry == RBCtristimulus) {
272 greg 2.34 uv[0] = uv[1] = 1. /
273     (-2.*sdv.spec.cx + 12.*sdv.spec.cy + 3.);
274     uv[0] *= 4.*sdv.spec.cx;
275     uv[1] *= 9.*sdv.spec.cy;
276     }
277     } else {
278 greg 2.50 bsdf = val_next[oy];
279     if (ox < sqres-1) {
280 greg 2.47 if (assignD) {
281     varset("Dx", '=', -iovec[3]);
282     varset("Dy", '=', -iovec[4]);
283     varset("Dz", '=', -iovec[5]);
284     ++eclock;
285     }
286 greg 2.50 val_next[oy] = funvalue(funame, 6, iovec);
287 greg 2.17 }
288 greg 2.50 if (abs_diff(bsdf, val_next[oy]) > ssamp_thresh ||
289     (ox && abs_diff(bsdf, val_last[oy]) > ssamp_thresh) ||
290     (oy && abs_diff(bsdf, val_last[oy-1]) > ssamp_thresh) ||
291     (oy < sqres-1 &&
292     abs_diff(bsdf, val_next[oy+1]) > ssamp_thresh)) {
293 greg 2.28 int ssi;
294 greg 2.45 double ssa[4], ssvec[6], sum = 0;
295 greg 2.28 /* super-sample voxel */
296 greg 2.52 for (ssi = nssamp; ssi--; ) {
297     SDmultiSamp(ssa, 4, (ssi+frandom()) /
298     (double)nssamp);
299 greg 2.42 ssvec[0] = 2.*sqfact*(ix+ssa[0]) - 1.;
300 greg 2.45 ssvec[1] = zipsgn*sqfact*ssa[1];
301     ssvec[2] = 1. - ssvec[0]*ssvec[0]
302     - ssvec[1]*ssvec[1];
303     if (ssvec[2] < .0) {
304     ssvec[1] = 0;
305     ssvec[2] = 1. - ssvec[0]*ssvec[0];
306     }
307     ssvec[2] = input_orient * sqrt(ssvec[2]);
308 greg 2.58 square2disk(ssvec+3, (ox+ssa[2])*sqfact,
309 greg 2.45 (oy+ssa[3])*sqfact);
310 greg 2.15 ssvec[5] = output_orient *
311     sqrt(1. - ssvec[3]*ssvec[3] -
312     ssvec[4]*ssvec[4]);
313 greg 2.17 if (assignD) {
314 greg 2.28 varset("Dx", '=', -ssvec[3]);
315     varset("Dy", '=', -ssvec[4]);
316     varset("Dz", '=', -ssvec[5]);
317 greg 2.17 ++eclock;
318     }
319 greg 2.16 sum += funvalue(funame, 6, ssvec);
320 greg 2.15 }
321 greg 2.52 bsdf = sum / (double)nssamp;
322 greg 2.15 }
323     }
324 greg 2.1 if (pctcull >= 0)
325 greg 2.37 putbinary(&bsdf, sizeof(bsdf), 1, ofp);
326 greg 2.1 else
327 greg 2.34 fprintf(ofp, "\t%.3e\n", bsdf);
328    
329     if (rbf_colorimetry == RBCtristimulus) {
330     if (pctcull >= 0) {
331 greg 2.37 putbinary(&uv[0], sizeof(*uv), 1, uvfp[0]);
332     putbinary(&uv[1], sizeof(*uv), 1, uvfp[1]);
333 greg 2.34 } else {
334     fprintf(uvfp[0], "\t%.3e\n", uv[0]);
335     fprintf(uvfp[1], "\t%.3e\n", uv[1]);
336     }
337     }
338 greg 2.50 if (val_last != NULL)
339     val_last[oy] = bsdf;
340 greg 2.1 }
341 greg 2.15 }
342 greg 2.3 if (rbf != NULL)
343     free(rbf);
344 greg 2.42 prog_show((ix+1.)*(2.*sqfact));
345 greg 2.1 }
346 greg 2.35 prog_done();
347 greg 2.50 if (val_last != NULL) {
348     free(val_last);
349     if (val_next != NULL) free(val_next);
350     if (sdv_next != NULL) free(sdv_next);
351 greg 2.47 }
352 greg 2.1 if (pctcull >= 0) { /* finish output */
353     if (pclose(ofp)) {
354 greg 2.34 fprintf(stderr, "%s: error running rttree_reduce on Y\n",
355     progname);
356     exit(1);
357     }
358     if (rbf_colorimetry == RBCtristimulus &&
359     (pclose(uvfp[0]) || pclose(uvfp[1]))) {
360     fprintf(stderr, "%s: error running rttree_reduce on uv\n",
361     progname);
362 greg 2.1 exit(1);
363     }
364     } else {
365     for (ix = sqres*sqres*sqres/2; ix--; )
366 greg 2.34 fputs("\t0\n", ofp);
367     fputs("}\n", ofp);
368     if (fclose(ofp)) {
369     fprintf(stderr, "%s: error writing Y file\n",
370     progname);
371     exit(1);
372     }
373     if (rbf_colorimetry == RBCtristimulus) {
374     for (ix = sqres*sqres*sqres/2; ix--; ) {
375     fputs("\t0\n", uvfp[0]);
376     fputs("\t0\n", uvfp[1]);
377     }
378     fputs("}\n", uvfp[0]);
379     fputs("}\n", uvfp[1]);
380     if (fclose(uvfp[0]) || fclose(uvfp[1])) {
381     fprintf(stderr, "%s: error writing uv file(s)\n",
382     progname);
383     exit(1);
384     }
385     }
386 greg 2.1 }
387     }
388    
389     /* Interpolate and output anisotropic BSDF data */
390     static void
391 greg 2.11 eval_anisotropic(char *funame)
392 greg 2.1 {
393     const int sqres = 1<<samp_order;
394 greg 2.42 const double sqfact = 1./(double)sqres;
395 greg 2.50 float *val_last = NULL;
396     float *val_next = NULL;
397     SDValue *sdv_next = NULL;
398 greg 2.34 FILE *ofp, *uvfp[2];
399 greg 2.17 int assignD = 0;
400 greg 2.1 char cmd[128];
401     int ix, iy, ox, oy;
402 greg 2.58 RREAL iovec[6];
403 greg 2.34 float bsdf, uv[2];
404 greg 2.15
405 greg 2.11 if (pctcull >= 0) {
406 greg 2.35 const char *avgopt = (input_orient>0 ^ output_orient>0)
407 greg 2.41 ? "" : recip;
408 greg 2.34 sprintf(cmd, "rttree_reduce%s -h -ff -r 4 -t %f -g %d > %s",
409 greg 2.35 avgopt, pctcull, samp_order,
410     create_component_file(0));
411 greg 2.1 ofp = popen(cmd, "w");
412     if (ofp == NULL) {
413     fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n",
414     progname);
415     exit(1);
416     }
417 greg 2.25 SET_FILE_BINARY(ofp);
418     #ifdef getc_unlocked /* avoid lock/unlock overhead */
419     flockfile(ofp);
420     #endif
421 greg 2.34 if (rbf_colorimetry == RBCtristimulus) {
422     double uvcull = 100. - (100.-pctcull)*.25;
423     sprintf(cmd, "rttree_reduce%s -h -ff -r 4 -t %f -g %d > %s",
424 greg 2.35 avgopt, uvcull, samp_order,
425     create_component_file(1));
426 greg 2.34 uvfp[0] = popen(cmd, "w");
427     sprintf(cmd, "rttree_reduce%s -h -ff -r 4 -t %f -g %d > %s",
428 greg 2.35 avgopt, uvcull, samp_order,
429     create_component_file(2));
430 greg 2.34 uvfp[1] = popen(cmd, "w");
431     if ((uvfp[0] == NULL) | (uvfp[1] == NULL)) {
432     fprintf(stderr, "%s: cannot open pipes to uv output\n",
433     progname);
434     exit(1);
435     }
436     SET_FILE_BINARY(uvfp[0]); SET_FILE_BINARY(uvfp[1]);
437     #ifdef getc_unlocked
438     flockfile(uvfp[0]); flockfile(uvfp[1]);
439     #endif
440     }
441     } else {
442     ofp = fopen(create_component_file(0), "w");
443     if (ofp == NULL) {
444     fprintf(stderr, "%s: cannot create Y output file\n",
445     progname);
446     exit(1);
447     }
448     fputs("{\n", ofp);
449     if (rbf_colorimetry == RBCtristimulus) {
450     uvfp[0] = fopen(create_component_file(1), "w");
451     uvfp[1] = fopen(create_component_file(2), "w");
452     if ((uvfp[0] == NULL) | (uvfp[1] == NULL)) {
453     fprintf(stderr, "%s: cannot create uv output file(s)\n",
454     progname);
455     exit(1);
456     }
457     fputs("{\n", uvfp[0]);
458     fputs("{\n", uvfp[1]);
459     }
460     }
461 greg 2.35 if (funame != NULL) /* need to assign Dx, Dy, Dz? */
462 greg 2.17 assignD = (fundefined(funame) < 6);
463 greg 2.50 val_last = (float *)calloc(sqres, sizeof(float));
464     if (funame == NULL)
465     sdv_next = (SDValue *)malloc(sizeof(SDValue)*sqres);
466     else
467     val_next = (float *)malloc(sizeof(float)*sqres);
468 greg 2.1 /* run through directions */
469     for (ix = 0; ix < sqres; ix++)
470     for (iy = 0; iy < sqres; iy++) {
471 greg 2.11 RBFNODE *rbf = NULL; /* Klems reversal */
472 greg 2.58 square2disk(iovec, 1.-(ix+.5)*sqfact, 1.-(iy+.5)*sqfact);
473 greg 2.11 iovec[2] = input_orient *
474     sqrt(1. - iovec[0]*iovec[0] - iovec[1]*iovec[1]);
475     if (funame == NULL)
476 greg 2.18 rbf = advect_rbf(iovec, lobe_lim);
477 greg 2.50 /* presample first row */
478     for (oy = 0; oy < sqres; oy++) {
479 greg 2.58 square2disk(iovec+3, .5*sqfact, (oy+.5)*sqfact);
480 greg 2.47 iovec[5] = output_orient *
481     sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
482     if (funame == NULL) {
483 greg 2.50 eval_rbfcol(&sdv_next[oy], rbf, iovec+3);
484 greg 2.47 } else {
485     if (assignD) {
486     varset("Dx", '=', -iovec[3]);
487     varset("Dy", '=', -iovec[4]);
488     varset("Dz", '=', -iovec[5]);
489     ++eclock;
490     }
491 greg 2.50 val_next[oy] = funvalue(funame, 6, iovec);
492 greg 2.47 }
493 greg 2.50 }
494     for (ox = 0; ox < sqres; ox++) {
495 greg 2.49 /*
496     * Super-sample when we detect a difference from before
497 greg 2.50 * or after in this row, above or below.
498 greg 2.49 */
499 greg 2.1 for (oy = 0; oy < sqres; oy++) {
500 greg 2.50 if (ox < sqres-1) { /* keeping one row ahead... */
501 greg 2.58 square2disk(iovec+3, (ox+1.5)*sqfact, (oy+.5)*sqfact);
502 greg 2.47 iovec[5] = output_orient *
503 greg 2.11 sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
504 greg 2.47 }
505 greg 2.34 if (funame == NULL) {
506 greg 2.50 SDValue sdv = sdv_next[oy];
507     bsdf = sdv.cieY;
508     if (ox < sqres-1)
509     eval_rbfcol(&sdv_next[oy], rbf, iovec+3);
510     if (abs_diff(bsdf, sdv_next[oy].cieY) > ssamp_thresh ||
511     (ox && abs_diff(bsdf, val_last[oy]) > ssamp_thresh) ||
512     (oy && abs_diff(bsdf, val_last[oy-1]) > ssamp_thresh) ||
513     (oy < sqres-1 &&
514     abs_diff(bsdf, sdv_next[oy+1].cieY) > ssamp_thresh)) {
515 greg 2.42 int ssi;
516     double ssa[2], sum = 0, usum = 0, vsum = 0;
517     /* super-sample voxel */
518 greg 2.52 for (ssi = nssamp; ssi--; ) {
519     SDmultiSamp(ssa, 2, (ssi+frandom()) /
520     (double)nssamp);
521 greg 2.58 square2disk(iovec+3, (ox+ssa[0])*sqfact,
522 greg 2.42 (oy+ssa[1])*sqfact);
523     iovec[5] = output_orient *
524     sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
525     eval_rbfcol(&sdv, rbf, iovec+3);
526     sum += sdv.cieY;
527     if (rbf_colorimetry == RBCtristimulus) {
528     sdv.cieY /=
529     -2.*sdv.spec.cx + 12.*sdv.spec.cy + 3.;
530     usum += 4.*sdv.spec.cx * sdv.cieY;
531     vsum += 9.*sdv.spec.cy * sdv.cieY;
532     }
533     }
534 greg 2.52 bsdf = sum / (double)nssamp;
535 greg 2.42 if (rbf_colorimetry == RBCtristimulus) {
536     uv[0] = usum / (sum+FTINY);
537     uv[1] = vsum / (sum+FTINY);
538     }
539 greg 2.57 } else if (rbf_colorimetry == RBCtristimulus) {
540 greg 2.34 uv[0] = uv[1] = 1. /
541     (-2.*sdv.spec.cx + 12.*sdv.spec.cy + 3.);
542     uv[0] *= 4.*sdv.spec.cx;
543     uv[1] *= 9.*sdv.spec.cy;
544     }
545     } else {
546 greg 2.50 bsdf = val_next[oy];
547     if (ox < sqres-1) {
548 greg 2.47 if (assignD) {
549     varset("Dx", '=', -iovec[3]);
550     varset("Dy", '=', -iovec[4]);
551     varset("Dz", '=', -iovec[5]);
552     ++eclock;
553     }
554 greg 2.50 val_next[oy] = funvalue(funame, 6, iovec);
555 greg 2.17 }
556 greg 2.50 if (abs_diff(bsdf, val_next[oy]) > ssamp_thresh ||
557     (ox && abs_diff(bsdf, val_last[oy]) > ssamp_thresh) ||
558     (oy && abs_diff(bsdf, val_last[oy-1]) > ssamp_thresh) ||
559     (oy < sqres-1 &&
560     abs_diff(bsdf, val_next[oy+1]) > ssamp_thresh)) {
561 greg 2.28 int ssi;
562     double ssa[4], ssvec[6], sum = 0;
563     /* super-sample voxel */
564 greg 2.52 for (ssi = nssamp; ssi--; ) {
565     SDmultiSamp(ssa, 4, (ssi+frandom()) /
566     (double)nssamp);
567 greg 2.58 square2disk(ssvec, 1.-(ix+ssa[0])*sqfact,
568 greg 2.42 1.-(iy+ssa[1])*sqfact);
569 greg 2.28 ssvec[2] = input_orient *
570 greg 2.15 sqrt(1. - ssvec[0]*ssvec[0] -
571     ssvec[1]*ssvec[1]);
572 greg 2.58 square2disk(ssvec+3, (ox+ssa[2])*sqfact,
573 greg 2.42 (oy+ssa[3])*sqfact);
574 greg 2.15 ssvec[5] = output_orient *
575     sqrt(1. - ssvec[3]*ssvec[3] -
576     ssvec[4]*ssvec[4]);
577 greg 2.17 if (assignD) {
578 greg 2.28 varset("Dx", '=', -ssvec[3]);
579     varset("Dy", '=', -ssvec[4]);
580     varset("Dz", '=', -ssvec[5]);
581 greg 2.17 ++eclock;
582     }
583 greg 2.16 sum += funvalue(funame, 6, ssvec);
584 greg 2.15 }
585 greg 2.52 bsdf = sum / (double)nssamp;
586 greg 2.15 }
587     }
588 greg 2.1 if (pctcull >= 0)
589 greg 2.37 putbinary(&bsdf, sizeof(bsdf), 1, ofp);
590 greg 2.1 else
591 greg 2.34 fprintf(ofp, "\t%.3e\n", bsdf);
592    
593     if (rbf_colorimetry == RBCtristimulus) {
594     if (pctcull >= 0) {
595 greg 2.37 putbinary(&uv[0], sizeof(*uv), 1, uvfp[0]);
596     putbinary(&uv[1], sizeof(*uv), 1, uvfp[1]);
597 greg 2.34 } else {
598     fprintf(uvfp[0], "\t%.3e\n", uv[0]);
599     fprintf(uvfp[1], "\t%.3e\n", uv[1]);
600     }
601     }
602 greg 2.50 if (val_last != NULL)
603     val_last[oy] = bsdf;
604 greg 2.1 }
605 greg 2.51 }
606 greg 2.3 if (rbf != NULL)
607     free(rbf);
608 greg 2.26 prog_show((ix*sqres+iy+1.)/(sqres*sqres));
609 greg 2.1 }
610 greg 2.35 prog_done();
611 greg 2.50 if (val_last != NULL) {
612     free(val_last);
613     if (val_next != NULL) free(val_next);
614     if (sdv_next != NULL) free(sdv_next);
615 greg 2.47 }
616 greg 2.1 if (pctcull >= 0) { /* finish output */
617     if (pclose(ofp)) {
618 greg 2.34 fprintf(stderr, "%s: error running rttree_reduce on Y\n",
619     progname);
620     exit(1);
621     }
622     if (rbf_colorimetry == RBCtristimulus &&
623     (pclose(uvfp[0]) || pclose(uvfp[1]))) {
624     fprintf(stderr, "%s: error running rttree_reduce on uv\n",
625     progname);
626 greg 2.1 exit(1);
627     }
628 greg 2.34 } else {
629     fputs("}\n", ofp);
630     if (fclose(ofp)) {
631     fprintf(stderr, "%s: error writing Y file\n",
632     progname);
633     exit(1);
634     }
635     if (rbf_colorimetry == RBCtristimulus) {
636     fputs("}\n", uvfp[0]);
637     fputs("}\n", uvfp[1]);
638     if (fclose(uvfp[0]) || fclose(uvfp[1])) {
639     fprintf(stderr, "%s: error writing uv file(s)\n",
640     progname);
641     exit(1);
642     }
643     }
644     }
645 greg 2.5 }
646    
647 schorsch 2.36 #if defined(_WIN32) || defined(_WIN64)
648 greg 2.34 /* Execute wrapBSDF command (may never return) */
649     static int
650     wrap_up(void)
651     {
652 greg 2.55 char cmd[32700];
653 greg 2.34
654     if (bsdf_manuf[0]) {
655     add_wbsdf("-f", 1);
656     strcpy(cmd, "m=");
657     strcpy(cmd+2, bsdf_manuf);
658     add_wbsdf(cmd, 0);
659     }
660     if (bsdf_name[0]) {
661     add_wbsdf("-f", 1);
662     strcpy(cmd, "n=");
663     strcpy(cmd+2, bsdf_name);
664     add_wbsdf(cmd, 0);
665     }
666     if (!convert_commandline(cmd, sizeof(cmd), wrapBSDF)) {
667     fputs(progname, stderr);
668     fputs(": command line too long in wrap_up()\n", stderr);
669     return(1);
670     }
671     return(system(cmd));
672     }
673     #else
674     /* Execute wrapBSDF command (may never return) */
675     static int
676     wrap_up(void)
677     {
678     char buf[256];
679     char *compath = getpath((char *)wrapBSDF[0], getenv("PATH"), X_OK);
680    
681     if (compath == NULL) {
682     fprintf(stderr, "%s: cannot locate %s\n", progname, wrapBSDF[0]);
683     return(1);
684     }
685     if (bsdf_manuf[0]) {
686     add_wbsdf("-f", 1);
687     strcpy(buf, "m=");
688     strcpy(buf+2, bsdf_manuf);
689     add_wbsdf(buf, 0);
690     }
691     if (bsdf_name[0]) {
692     add_wbsdf("-f", 1);
693     strcpy(buf, "n=");
694     strcpy(buf+2, bsdf_name);
695     add_wbsdf(buf, 0);
696     }
697     execv(compath, wrapBSDF); /* successful call never returns */
698     perror(compath);
699     return(1);
700     }
701     #endif
702    
703 greg 2.56 #define HEAD_BUFLEN 10240
704 greg 2.53 static char head_buf[HEAD_BUFLEN];
705     static int cur_headlen = 0;
706    
707     /* Record header line as comment associated with this SIR input */
708     static int
709     record2header(char *s)
710     {
711     int len = strlen(s);
712    
713     if (cur_headlen+len >= HEAD_BUFLEN-6)
714     return(0);
715     /* includes EOL */
716     strcpy(head_buf+cur_headlen, s);
717     cur_headlen += len;
718    
719 greg 2.54 #if defined(_WIN32) || defined(_WIN64)
720     if (head_buf[cur_headlen-1] == '\n')
721     head_buf[cur_headlen-1] = '\t';
722     #endif
723 greg 2.53 return(1);
724     }
725    
726     /* Finish off header for this file */
727     static void
728     done_header(void)
729     {
730     while (cur_headlen > 0 && isspace(head_buf[cur_headlen-1]))
731     --cur_headlen;
732     head_buf[cur_headlen] = '\0';
733     if (!cur_headlen)
734     return;
735     add_wbsdf("-C", 1);
736     add_wbsdf(head_buf, 0);
737     head_buf[cur_headlen=0] = '\0';
738     }
739    
740 greg 2.1 /* Read in BSDF and interpolate as tensor tree representation */
741     int
742     main(int argc, char *argv[])
743     {
744 greg 2.56 static const char tfmt[2][4] = {"t4", "t3"};
745     int dofwd = 0, dobwd = 1;
746     int nsirs = 0;
747     char buf[1024];
748     int i;
749 greg 2.1
750 greg 2.5 progname = argv[0];
751 greg 2.11 esupport |= E_VARIABLE|E_FUNCTION|E_RCONST;
752     esupport &= ~(E_INCHAN|E_OUTCHAN);
753     scompile("PI:3.14159265358979323846", NULL, 0);
754     biggerlib();
755 greg 2.56 strcpy(buf, "File produced by: ");
756     if (convert_commandline(buf+18, sizeof(buf)-18, argv) != NULL) {
757     add_wbsdf("-C", 1); add_wbsdf(buf, 0);
758     }
759     for (i = 1; i < argc; i++)
760     if ((argv[i][0] == '-') | (argv[i][0] == '+')) {
761     switch (argv[i][1]) { /* get option */
762 greg 2.11 case 'e':
763     scompile(argv[++i], NULL, 0);
764 greg 2.46 if (single_plane_incident < 0)
765     single_plane_incident = 0;
766 greg 2.11 break;
767     case 'f':
768 greg 2.59 if ((argv[i][0] == '-') & !argv[i][2]) {
769 greg 2.34 if (strchr(argv[++i], '=') != NULL) {
770     add_wbsdf("-f", 1);
771     add_wbsdf(argv[i], 1);
772 greg 2.43 } else {
773     char *fpath = getpath(argv[i],
774     getrlibpath(), 0);
775     if (fpath == NULL) {
776     fprintf(stderr,
777     "%s: cannot find file '%s'\n",
778     argv[0], argv[i]);
779     return(1);
780     }
781     fcompile(fpath);
782 greg 2.45 if (single_plane_incident < 0)
783     single_plane_incident = 0;
784 greg 2.43 }
785 greg 2.34 } else
786 greg 2.11 dofwd = (argv[i][0] == '+');
787     break;
788 greg 2.41 case 'a':
789     recip = (argv[i][0] == '+') ? " -a" : "";
790     break;
791 greg 2.11 case 'b':
792     dobwd = (argv[i][0] == '+');
793     break;
794 greg 2.52 case 'n':
795     nssamp = atoi(argv[++i]);
796     if (nssamp <= 0)
797     goto userr;
798     break;
799     case 's':
800     ssamp_thresh = atof(argv[++i]);
801     if (ssamp_thresh <= FTINY)
802     goto userr;
803     break;
804 greg 2.1 case 't':
805 greg 2.11 switch (argv[i][2]) {
806     case '3':
807 greg 2.13 single_plane_incident = 1;
808 greg 2.11 break;
809     case '4':
810 greg 2.13 single_plane_incident = 0;
811 greg 2.11 break;
812     case '\0':
813     pctcull = atof(argv[++i]);
814     break;
815     default:
816     goto userr;
817     }
818 greg 2.1 break;
819     case 'g':
820 greg 2.5 samp_order = atoi(argv[++i]);
821 greg 2.1 break;
822 greg 2.18 case 'l':
823     lobe_lim = atoi(argv[++i]);
824     break;
825 greg 2.26 case 'p':
826     do_prog = atoi(argv[i]+2);
827     break;
828 greg 2.34 case 'W':
829     add_wbsdf(argv[i], 1);
830     break;
831     case 'u':
832     case 'C':
833     add_wbsdf(argv[i], 1);
834     add_wbsdf(argv[++i], 1);
835     break;
836 greg 2.1 default:
837     goto userr;
838     }
839 greg 2.56 } else { /* input SIR or function */
840     FILE *fpin;
841     if (!nsirs & (single_plane_incident >= 0))
842     break; /* must be a function */
843     if (nsirs >= 4) {
844     fprintf(stderr, "At most 4 SIR inputs supported\n");
845     goto userr;
846     }
847     fpin = fopen(argv[i], "rb"); /* open SIR file */
848     if (fpin == NULL) {
849     fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n",
850     progname, argv[i]);
851     return(1);
852     }
853     sprintf(buf, "%s:\n", argv[i]);
854     record2header(buf);
855     sir_headshare = &record2header;
856     if (!load_bsdf_rep(fpin))
857     return(1);
858     fclose(fpin);
859     done_header();
860     sprintf(buf, "Interpolating component '%s'", argv[i]);
861     prog_start(buf);
862     if (!nsirs++) {
863     add_wbsdf("-a", 1);
864     add_wbsdf(tfmt[single_plane_incident], 1);
865     }
866     if (single_plane_incident)
867     eval_isotropic(NULL);
868     else
869     eval_anisotropic(NULL);
870     }
871     if (i < argc) { /* function-based BSDF? */
872 greg 2.11 void (*evf)(char *s) = single_plane_incident ?
873 greg 2.34 eval_isotropic : eval_anisotropic;
874 greg 2.17 if (i != argc-1 || fundefined(argv[i]) < 3) {
875 greg 2.12 fprintf(stderr,
876     "%s: need single function with 6 arguments: bsdf(ix,iy,iz,ox,oy,oz)\n",
877     progname);
878 greg 2.24 fprintf(stderr, "\tor 3 arguments using Dx,Dy,Dz: bsdf(ix,iy,iz)\n");
879 greg 2.11 goto userr;
880 greg 2.12 }
881 greg 2.17 ++eclock;
882 greg 2.34 add_wbsdf("-a", 1);
883     add_wbsdf(tfmt[single_plane_incident], 1);
884 greg 2.11 if (dofwd) {
885     input_orient = -1;
886     output_orient = -1;
887 greg 2.26 prog_start("Evaluating outside reflectance");
888     (*evf)(argv[i]);
889 greg 2.11 output_orient = 1;
890 greg 2.26 prog_start("Evaluating outside->inside transmission");
891     (*evf)(argv[i]);
892 greg 2.11 }
893     if (dobwd) {
894     input_orient = 1;
895     output_orient = 1;
896 greg 2.26 prog_start("Evaluating inside reflectance");
897     (*evf)(argv[i]);
898 greg 2.11 output_orient = -1;
899 greg 2.26 prog_start("Evaluating inside->outside transmission");
900     (*evf)(argv[i]);
901 greg 2.11 }
902 greg 2.56 } else if (!nsirs) { /* else load SIR from stdin? */
903     record2header("<stdin>:\n");
904     sir_headshare = &record2header;
905     if (!load_bsdf_rep(stdin))
906     return(1);
907     done_header();
908     prog_start("Interpolating from standard input");
909     add_wbsdf("-a", 1);
910     add_wbsdf(tfmt[single_plane_incident], 1);
911     if (single_plane_incident) /* resample dist. */
912     eval_isotropic(NULL);
913     else
914     eval_anisotropic(NULL);
915 greg 2.11 }
916 greg 2.56 return(wrap_up()); /* call wrapBSDF */
917 greg 2.1 userr:
918     fprintf(stderr,
919 greg 2.56 "Usage: %s [{+|-}a][-g Nlog2][-t pctcull][-n nss][-s thresh][-l maxlobes][bsdf.sir ..] > bsdf.xml\n",
920 greg 2.11 progname);
921     fprintf(stderr,
922 greg 2.52 " or: %s -t{3|4} [{+|-}a][-g Nlog2][-t pctcull][-n nss][-s thresh][{+|-}for[ward]][{+|-}b[ackward]][-e expr][-f file] bsdf_func > bsdf.xml\n",
923 greg 2.1 progname);
924     return(1);
925     }