20 |
|
double pctcull = 90.; |
21 |
|
/* sampling order */ |
22 |
|
int samp_order = 6; |
23 |
+ |
/* super-sampling threshold */ |
24 |
+ |
const double ssamp_thresh = 0.35; |
25 |
+ |
/* number of super-samples */ |
26 |
+ |
const int nssamp = 100; |
27 |
+ |
/* limit on number of RBF lobes */ |
28 |
+ |
static int lobe_lim = 15000; |
29 |
|
|
30 |
|
/* Output XML prologue to stdout */ |
31 |
|
static void |
96 |
|
puts("</WindowElement>"); |
97 |
|
} |
98 |
|
|
99 |
+ |
/* Compute absolute relative difference */ |
100 |
+ |
static double |
101 |
+ |
abs_diff(double v1, double v0) |
102 |
+ |
{ |
103 |
+ |
if ((v0 < 0) | (v1 < 0)) |
104 |
+ |
return(.0); |
105 |
+ |
v1 = (v1-v0)*2./(v0+v1+.0001); |
106 |
+ |
if (v1 < 0) |
107 |
+ |
return(-v1); |
108 |
+ |
return(v1); |
109 |
+ |
} |
110 |
+ |
|
111 |
|
/* Interpolate and output isotropic BSDF data */ |
112 |
|
static void |
113 |
|
eval_isotropic(char *funame) |
114 |
|
{ |
115 |
|
const int sqres = 1<<samp_order; |
116 |
|
FILE *ofp = NULL; |
117 |
+ |
int assignD = 0; |
118 |
|
char cmd[128]; |
119 |
|
int ix, ox, oy; |
120 |
|
double iovec[6]; |
121 |
|
float bsdf; |
122 |
< |
#if DEBUG |
104 |
< |
fprintf(stderr, "Writing isotropic order %d ", samp_order); |
105 |
< |
if (pctcull >= 0) fprintf(stderr, "data with %.1f%% culling\n", pctcull); |
106 |
< |
else fputs("raw data\n", stderr); |
107 |
< |
#endif |
122 |
> |
|
123 |
|
data_prologue(); /* begin output */ |
124 |
|
if (pctcull >= 0) { |
125 |
|
sprintf(cmd, "rttree_reduce -h -a -ff -r 3 -t %f -g %d", |
134 |
|
SET_FILE_BINARY(ofp); |
135 |
|
} else |
136 |
|
fputs("{\n", stdout); |
137 |
+ |
/* need to assign Dx, Dy, Dz? */ |
138 |
+ |
if (funame != NULL) |
139 |
+ |
assignD = (fundefined(funame) < 6); |
140 |
|
/* run through directions */ |
141 |
|
for (ix = 0; ix < sqres/2; ix++) { |
142 |
|
RBFNODE *rbf = NULL; |
143 |
< |
iovec[0] = (ix+.5)/sqres - 1.; |
143 |
> |
iovec[0] = 2.*(ix+.5)/sqres - 1.; |
144 |
|
iovec[1] = .0; |
145 |
|
iovec[2] = input_orient * sqrt(1. - iovec[0]*iovec[0]); |
146 |
|
if (funame == NULL) |
147 |
< |
rbf = advect_rbf(iovec); |
148 |
< |
for (ox = 0; ox < sqres; ox++) |
147 |
> |
rbf = advect_rbf(iovec, lobe_lim); |
148 |
> |
for (ox = 0; ox < sqres; ox++) { |
149 |
> |
float last_bsdf = -1; |
150 |
|
for (oy = 0; oy < sqres; oy++) { |
151 |
|
SDsquare2disk(iovec+3, (ox+.5)/sqres, (oy+.5)/sqres); |
152 |
|
iovec[5] = output_orient * |
153 |
|
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]); |
154 |
|
if (funame == NULL) |
155 |
< |
bsdf = eval_rbfrep(rbf, iovec+3) * |
155 |
> |
bsdf = eval_rbfrep(rbf, iovec+3) * |
156 |
|
output_orient/iovec[5]; |
157 |
< |
else |
158 |
< |
bsdf = funvalue(funame, 6, iovec); |
157 |
> |
else { |
158 |
> |
double ssa[3], ssvec[6], sum; |
159 |
> |
int ssi; |
160 |
> |
if (assignD) { |
161 |
> |
varset("Dx", '=', -iovec[3]); |
162 |
> |
varset("Dy", '=', -iovec[4]); |
163 |
> |
varset("Dz", '=', -iovec[5]); |
164 |
> |
++eclock; |
165 |
> |
} |
166 |
> |
bsdf = funvalue(funame, 6, iovec); |
167 |
> |
if (abs_diff(bsdf, last_bsdf) > ssamp_thresh) { |
168 |
> |
sum = 0; /* super-sample voxel */ |
169 |
> |
for (ssi = nssamp; ssi--; ) { |
170 |
> |
SDmultiSamp(ssa, 3, (ssi+drand48())/nssamp); |
171 |
> |
ssvec[0] = 2.*(ix+ssa[0])/sqres - 1.; |
172 |
> |
ssvec[1] = .0; |
173 |
> |
ssvec[2] = input_orient * |
174 |
> |
sqrt(1. - ssvec[0]*ssvec[0]); |
175 |
> |
SDsquare2disk(ssvec+3, (ox+ssa[1])/sqres, |
176 |
> |
(oy+ssa[2])/sqres); |
177 |
> |
ssvec[5] = output_orient * |
178 |
> |
sqrt(1. - ssvec[3]*ssvec[3] - |
179 |
> |
ssvec[4]*ssvec[4]); |
180 |
> |
if (assignD) { |
181 |
> |
varset("Dx", '=', -iovec[3]); |
182 |
> |
varset("Dy", '=', -iovec[4]); |
183 |
> |
varset("Dz", '=', -iovec[5]); |
184 |
> |
++eclock; |
185 |
> |
} |
186 |
> |
sum += funvalue(funame, 6, ssvec); |
187 |
> |
} |
188 |
> |
bsdf = sum/nssamp; |
189 |
> |
} |
190 |
> |
} |
191 |
|
if (pctcull >= 0) |
192 |
|
fwrite(&bsdf, sizeof(bsdf), 1, ofp); |
193 |
|
else |
194 |
|
printf("\t%.3e\n", bsdf); |
195 |
+ |
last_bsdf = bsdf; |
196 |
|
} |
197 |
+ |
} |
198 |
|
if (rbf != NULL) |
199 |
|
free(rbf); |
200 |
|
} |
218 |
|
{ |
219 |
|
const int sqres = 1<<samp_order; |
220 |
|
FILE *ofp = NULL; |
221 |
+ |
int assignD = 0; |
222 |
|
char cmd[128]; |
223 |
|
int ix, iy, ox, oy; |
224 |
|
double iovec[6]; |
225 |
|
float bsdf; |
226 |
< |
#if DEBUG |
173 |
< |
fprintf(stderr, "Writing anisotropic order %d ", samp_order); |
174 |
< |
if (pctcull >= 0) fprintf(stderr, "data with %.1f%% culling\n", pctcull); |
175 |
< |
else fputs("raw data\n", stderr); |
176 |
< |
#endif |
226 |
> |
|
227 |
|
data_prologue(); /* begin output */ |
228 |
|
if (pctcull >= 0) { |
229 |
|
sprintf(cmd, "rttree_reduce -h -a -ff -r 4 -t %f -g %d", |
237 |
|
} |
238 |
|
} else |
239 |
|
fputs("{\n", stdout); |
240 |
+ |
/* need to assign Dx, Dy, Dz? */ |
241 |
+ |
if (funame != NULL) |
242 |
+ |
assignD = (fundefined(funame) < 6); |
243 |
|
/* run through directions */ |
244 |
|
for (ix = 0; ix < sqres; ix++) |
245 |
|
for (iy = 0; iy < sqres; iy++) { |
246 |
|
RBFNODE *rbf = NULL; /* Klems reversal */ |
247 |
< |
SDsquare2disk(iovec, (ix+.5)/sqres, (iy+.5)/sqres); |
195 |
< |
iovec[0] = -iovec[0]; iovec[1] = -iovec[1]; |
247 |
> |
SDsquare2disk(iovec, 1.-(ix+.5)/sqres, 1.-(iy+.5)/sqres); |
248 |
|
iovec[2] = input_orient * |
249 |
|
sqrt(1. - iovec[0]*iovec[0] - iovec[1]*iovec[1]); |
250 |
|
if (funame == NULL) |
251 |
< |
rbf = advect_rbf(iovec); |
252 |
< |
for (ox = 0; ox < sqres; ox++) |
251 |
> |
rbf = advect_rbf(iovec, lobe_lim); |
252 |
> |
for (ox = 0; ox < sqres; ox++) { |
253 |
> |
float last_bsdf = -1; |
254 |
|
for (oy = 0; oy < sqres; oy++) { |
255 |
|
SDsquare2disk(iovec+3, (ox+.5)/sqres, (oy+.5)/sqres); |
256 |
|
iovec[5] = output_orient * |
257 |
|
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]); |
258 |
|
if (funame == NULL) |
259 |
< |
bsdf = eval_rbfrep(rbf, iovec+3) * |
259 |
> |
bsdf = eval_rbfrep(rbf, iovec+3) * |
260 |
|
output_orient/iovec[5]; |
261 |
< |
else |
262 |
< |
bsdf = funvalue(funame, 6, iovec); |
261 |
> |
else { |
262 |
> |
double ssa[4], ssvec[6], sum; |
263 |
> |
int ssi; |
264 |
> |
if (assignD) { |
265 |
> |
varset("Dx", '=', -iovec[3]); |
266 |
> |
varset("Dy", '=', -iovec[4]); |
267 |
> |
varset("Dz", '=', -iovec[5]); |
268 |
> |
++eclock; |
269 |
> |
} |
270 |
> |
bsdf = funvalue(funame, 6, iovec); |
271 |
> |
if (abs_diff(bsdf, last_bsdf) > ssamp_thresh) { |
272 |
> |
sum = 0; /* super-sample voxel */ |
273 |
> |
for (ssi = nssamp; ssi--; ) { |
274 |
> |
SDmultiSamp(ssa, 4, (ssi+drand48())/nssamp); |
275 |
> |
SDsquare2disk(ssvec, 1.-(ix+ssa[0])/sqres, |
276 |
> |
1.-(iy+ssa[1])/sqres); |
277 |
> |
ssvec[2] = output_orient * |
278 |
> |
sqrt(1. - ssvec[0]*ssvec[0] - |
279 |
> |
ssvec[1]*ssvec[1]); |
280 |
> |
SDsquare2disk(ssvec+3, (ox+ssa[2])/sqres, |
281 |
> |
(oy+ssa[3])/sqres); |
282 |
> |
ssvec[5] = output_orient * |
283 |
> |
sqrt(1. - ssvec[3]*ssvec[3] - |
284 |
> |
ssvec[4]*ssvec[4]); |
285 |
> |
if (assignD) { |
286 |
> |
varset("Dx", '=', -iovec[3]); |
287 |
> |
varset("Dy", '=', -iovec[4]); |
288 |
> |
varset("Dz", '=', -iovec[5]); |
289 |
> |
++eclock; |
290 |
> |
} |
291 |
> |
sum += funvalue(funame, 6, ssvec); |
292 |
> |
} |
293 |
> |
bsdf = sum/nssamp; |
294 |
> |
} |
295 |
> |
} |
296 |
|
if (pctcull >= 0) |
297 |
|
fwrite(&bsdf, sizeof(bsdf), 1, ofp); |
298 |
|
else |
299 |
|
printf("\t%.3e\n", bsdf); |
300 |
+ |
last_bsdf = bsdf; |
301 |
|
} |
302 |
+ |
} |
303 |
|
if (rbf != NULL) |
304 |
|
free(rbf); |
305 |
|
} |
343 |
|
case 't': |
344 |
|
switch (argv[i][2]) { |
345 |
|
case '3': |
346 |
< |
single_plane_incident = 0; |
346 |
> |
single_plane_incident = 1; |
347 |
|
break; |
348 |
|
case '4': |
349 |
< |
single_plane_incident = 1; |
349 |
> |
single_plane_incident = 0; |
350 |
|
break; |
351 |
|
case '\0': |
352 |
|
pctcull = atof(argv[++i]); |
358 |
|
case 'g': |
359 |
|
samp_order = atoi(argv[++i]); |
360 |
|
break; |
361 |
+ |
case 'l': |
362 |
+ |
lobe_lim = atoi(argv[++i]); |
363 |
+ |
break; |
364 |
|
default: |
365 |
|
goto userr; |
366 |
|
} |
367 |
|
if (single_plane_incident >= 0) { /* function-based BSDF? */ |
368 |
|
void (*evf)(char *s) = single_plane_incident ? |
369 |
|
&eval_isotropic : &eval_anisotropic; |
370 |
< |
if (i != argc-1 || fundefined(argv[i]) != 6) |
370 |
> |
if (i != argc-1 || fundefined(argv[i]) < 3) { |
371 |
> |
fprintf(stderr, |
372 |
> |
"%s: need single function with 6 arguments: bsdf(ix,iy,iz,ox,oy,oz)\n", |
373 |
> |
progname); |
374 |
> |
fprintf(stderr, "\tor 3 arguments using Dx,Dy,Dz: bsdf(ix,iy,iz)\n", |
375 |
> |
progname); |
376 |
|
goto userr; |
377 |
+ |
} |
378 |
+ |
++eclock; |
379 |
|
xml_prologue(argc, argv); /* start XML output */ |
380 |
|
if (dofwd) { |
381 |
|
input_orient = -1; |
395 |
|
return(0); |
396 |
|
} |
397 |
|
if (i < argc) { /* open input files if given */ |
398 |
< |
xml_prologue(argc, argv); /* start XML output */ |
398 |
> |
int nbsdf = 0; |
399 |
|
for ( ; i < argc; i++) { /* interpolate each component */ |
400 |
|
FILE *fpin = fopen(argv[i], "rb"); |
401 |
|
if (fpin == NULL) { |
406 |
|
if (!load_bsdf_rep(fpin)) |
407 |
|
return(1); |
408 |
|
fclose(fpin); |
409 |
+ |
if (!nbsdf++) /* start XML on first dist. */ |
410 |
+ |
xml_prologue(argc, argv); |
411 |
|
if (single_plane_incident) |
412 |
|
eval_isotropic(NULL); |
413 |
|
else |
428 |
|
return(0); |
429 |
|
userr: |
430 |
|
fprintf(stderr, |
431 |
< |
"Usage: %s [-g Nlog2][-t pctcull] [bsdf.sir ..] > bsdf.xml\n", |
431 |
> |
"Usage: %s [-g Nlog2][-t pctcull][-l maxlobes] [bsdf.sir ..] > bsdf.xml\n", |
432 |
|
progname); |
433 |
|
fprintf(stderr, |
434 |
|
" or: %s -t{3|4} [-g Nlog2][-t pctcull][{+|-}for[ward]][{+|-}b[ackward]][-e expr][-f file] bsdf_func > bsdf.xml\n", |