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 |
|
|
28 |
|
/* Output XML prologue to stdout */ |
29 |
|
static void |
94 |
|
puts("</WindowElement>"); |
95 |
|
} |
96 |
|
|
97 |
+ |
/* Compute absolute relative difference */ |
98 |
+ |
static double |
99 |
+ |
abs_diff(double v1, double v0) |
100 |
+ |
{ |
101 |
+ |
if ((v0 < 0) | (v1 < 0)) |
102 |
+ |
return(.0); |
103 |
+ |
v1 = (v1-v0)*2./(v0+v1+.0001); |
104 |
+ |
if (v1 < 0) |
105 |
+ |
return(-v1); |
106 |
+ |
return(v1); |
107 |
+ |
} |
108 |
+ |
|
109 |
|
/* Interpolate and output isotropic BSDF data */ |
110 |
|
static void |
111 |
|
eval_isotropic(char *funame) |
112 |
|
{ |
113 |
|
const int sqres = 1<<samp_order; |
114 |
|
FILE *ofp = NULL; |
115 |
+ |
int assignD = 0; |
116 |
|
char cmd[128]; |
117 |
|
int ix, ox, oy; |
118 |
|
double iovec[6]; |
119 |
|
float bsdf; |
120 |
< |
#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 |
120 |
> |
|
121 |
|
data_prologue(); /* begin output */ |
122 |
|
if (pctcull >= 0) { |
123 |
|
sprintf(cmd, "rttree_reduce -h -a -ff -r 3 -t %f -g %d", |
132 |
|
SET_FILE_BINARY(ofp); |
133 |
|
} else |
134 |
|
fputs("{\n", stdout); |
135 |
+ |
/* need to assign Dx, Dy, Dz? */ |
136 |
+ |
if (funame != NULL) |
137 |
+ |
assignD = (fundefined(funame) < 6); |
138 |
|
/* run through directions */ |
139 |
|
for (ix = 0; ix < sqres/2; ix++) { |
140 |
|
RBFNODE *rbf = NULL; |
141 |
< |
iovec[0] = (ix+.5)/sqres - 1.; |
141 |
> |
iovec[0] = 2.*(ix+.5)/sqres - 1.; |
142 |
|
iovec[1] = .0; |
143 |
|
iovec[2] = input_orient * sqrt(1. - iovec[0]*iovec[0]); |
144 |
|
if (funame == NULL) |
145 |
|
rbf = advect_rbf(iovec); |
146 |
< |
for (ox = 0; ox < sqres; ox++) |
146 |
> |
for (ox = 0; ox < sqres; ox++) { |
147 |
> |
float last_bsdf = -1; |
148 |
|
for (oy = 0; oy < sqres; oy++) { |
149 |
|
SDsquare2disk(iovec+3, (ox+.5)/sqres, (oy+.5)/sqres); |
150 |
|
iovec[5] = output_orient * |
151 |
|
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]); |
152 |
|
if (funame == NULL) |
153 |
< |
bsdf = eval_rbfrep(rbf, iovec+3) * |
153 |
> |
bsdf = eval_rbfrep(rbf, iovec+3) * |
154 |
|
output_orient/iovec[5]; |
155 |
< |
else |
156 |
< |
bsdf = funvalue(funame, 6, iovec); |
155 |
> |
else { |
156 |
> |
double ssa[3], ssvec[6], sum; |
157 |
> |
int ssi; |
158 |
> |
if (assignD) { |
159 |
> |
varset("Dx", '=', -iovec[3]); |
160 |
> |
varset("Dy", '=', -iovec[4]); |
161 |
> |
varset("Dz", '=', -iovec[5]); |
162 |
> |
++eclock; |
163 |
> |
} |
164 |
> |
bsdf = funvalue(funame, 6, iovec); |
165 |
> |
if (abs_diff(bsdf, last_bsdf) > ssamp_thresh) { |
166 |
> |
sum = 0; /* super-sample voxel */ |
167 |
> |
for (ssi = nssamp; ssi--; ) { |
168 |
> |
SDmultiSamp(ssa, 3, (ssi+drand48())/nssamp); |
169 |
> |
ssvec[0] = 2.*(ix+ssa[0])/sqres - 1.; |
170 |
> |
ssvec[1] = .0; |
171 |
> |
ssvec[2] = input_orient * |
172 |
> |
sqrt(1. - ssvec[0]*ssvec[0]); |
173 |
> |
SDsquare2disk(ssvec+3, (ox+ssa[1])/sqres, |
174 |
> |
(oy+ssa[2])/sqres); |
175 |
> |
ssvec[5] = output_orient * |
176 |
> |
sqrt(1. - ssvec[3]*ssvec[3] - |
177 |
> |
ssvec[4]*ssvec[4]); |
178 |
> |
if (assignD) { |
179 |
> |
varset("Dx", '=', -iovec[3]); |
180 |
> |
varset("Dy", '=', -iovec[4]); |
181 |
> |
varset("Dz", '=', -iovec[5]); |
182 |
> |
++eclock; |
183 |
> |
} |
184 |
> |
sum += funvalue(funame, 6, ssvec); |
185 |
> |
} |
186 |
> |
bsdf = sum/nssamp; |
187 |
> |
} |
188 |
> |
} |
189 |
|
if (pctcull >= 0) |
190 |
|
fwrite(&bsdf, sizeof(bsdf), 1, ofp); |
191 |
|
else |
192 |
|
printf("\t%.3e\n", bsdf); |
193 |
+ |
last_bsdf = bsdf; |
194 |
|
} |
195 |
+ |
} |
196 |
|
if (rbf != NULL) |
197 |
|
free(rbf); |
198 |
|
} |
216 |
|
{ |
217 |
|
const int sqres = 1<<samp_order; |
218 |
|
FILE *ofp = NULL; |
219 |
+ |
int assignD = 0; |
220 |
|
char cmd[128]; |
221 |
|
int ix, iy, ox, oy; |
222 |
|
double iovec[6]; |
223 |
|
float bsdf; |
224 |
< |
#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 |
224 |
> |
|
225 |
|
data_prologue(); /* begin output */ |
226 |
|
if (pctcull >= 0) { |
227 |
|
sprintf(cmd, "rttree_reduce -h -a -ff -r 4 -t %f -g %d", |
235 |
|
} |
236 |
|
} else |
237 |
|
fputs("{\n", stdout); |
238 |
+ |
/* need to assign Dx, Dy, Dz? */ |
239 |
+ |
if (funame != NULL) |
240 |
+ |
assignD = (fundefined(funame) < 6); |
241 |
|
/* run through directions */ |
242 |
|
for (ix = 0; ix < sqres; ix++) |
243 |
|
for (iy = 0; iy < sqres; iy++) { |
244 |
|
RBFNODE *rbf = NULL; /* Klems reversal */ |
245 |
< |
SDsquare2disk(iovec, (ix+.5)/sqres, (iy+.5)/sqres); |
195 |
< |
iovec[0] = -iovec[0]; iovec[1] = -iovec[1]; |
245 |
> |
SDsquare2disk(iovec, 1.-(ix+.5)/sqres, 1.-(iy+.5)/sqres); |
246 |
|
iovec[2] = input_orient * |
247 |
|
sqrt(1. - iovec[0]*iovec[0] - iovec[1]*iovec[1]); |
248 |
|
if (funame == NULL) |
249 |
|
rbf = advect_rbf(iovec); |
250 |
< |
for (ox = 0; ox < sqres; ox++) |
250 |
> |
for (ox = 0; ox < sqres; ox++) { |
251 |
> |
float last_bsdf = -1; |
252 |
|
for (oy = 0; oy < sqres; oy++) { |
253 |
|
SDsquare2disk(iovec+3, (ox+.5)/sqres, (oy+.5)/sqres); |
254 |
|
iovec[5] = output_orient * |
255 |
|
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]); |
256 |
|
if (funame == NULL) |
257 |
< |
bsdf = eval_rbfrep(rbf, iovec+3) * |
257 |
> |
bsdf = eval_rbfrep(rbf, iovec+3) * |
258 |
|
output_orient/iovec[5]; |
259 |
< |
else |
260 |
< |
bsdf = funvalue(funame, 6, iovec); |
259 |
> |
else { |
260 |
> |
double ssa[4], ssvec[6], sum; |
261 |
> |
int ssi; |
262 |
> |
if (assignD) { |
263 |
> |
varset("Dx", '=', -iovec[3]); |
264 |
> |
varset("Dy", '=', -iovec[4]); |
265 |
> |
varset("Dz", '=', -iovec[5]); |
266 |
> |
++eclock; |
267 |
> |
} |
268 |
> |
bsdf = funvalue(funame, 6, iovec); |
269 |
> |
if (abs_diff(bsdf, last_bsdf) > ssamp_thresh) { |
270 |
> |
sum = 0; /* super-sample voxel */ |
271 |
> |
for (ssi = nssamp; ssi--; ) { |
272 |
> |
SDmultiSamp(ssa, 4, (ssi+drand48())/nssamp); |
273 |
> |
SDsquare2disk(ssvec, 1.-(ix+ssa[0])/sqres, |
274 |
> |
1.-(iy+ssa[1])/sqres); |
275 |
> |
ssvec[2] = output_orient * |
276 |
> |
sqrt(1. - ssvec[0]*ssvec[0] - |
277 |
> |
ssvec[1]*ssvec[1]); |
278 |
> |
SDsquare2disk(ssvec+3, (ox+ssa[2])/sqres, |
279 |
> |
(oy+ssa[3])/sqres); |
280 |
> |
ssvec[5] = output_orient * |
281 |
> |
sqrt(1. - ssvec[3]*ssvec[3] - |
282 |
> |
ssvec[4]*ssvec[4]); |
283 |
> |
if (assignD) { |
284 |
> |
varset("Dx", '=', -iovec[3]); |
285 |
> |
varset("Dy", '=', -iovec[4]); |
286 |
> |
varset("Dz", '=', -iovec[5]); |
287 |
> |
++eclock; |
288 |
> |
} |
289 |
> |
sum += funvalue(funame, 6, ssvec); |
290 |
> |
} |
291 |
> |
bsdf = sum/nssamp; |
292 |
> |
} |
293 |
> |
} |
294 |
|
if (pctcull >= 0) |
295 |
|
fwrite(&bsdf, sizeof(bsdf), 1, ofp); |
296 |
|
else |
297 |
|
printf("\t%.3e\n", bsdf); |
298 |
+ |
last_bsdf = bsdf; |
299 |
|
} |
300 |
+ |
} |
301 |
|
if (rbf != NULL) |
302 |
|
free(rbf); |
303 |
|
} |
341 |
|
case 't': |
342 |
|
switch (argv[i][2]) { |
343 |
|
case '3': |
344 |
< |
single_plane_incident = 0; |
344 |
> |
single_plane_incident = 1; |
345 |
|
break; |
346 |
|
case '4': |
347 |
< |
single_plane_incident = 1; |
347 |
> |
single_plane_incident = 0; |
348 |
|
break; |
349 |
|
case '\0': |
350 |
|
pctcull = atof(argv[++i]); |
362 |
|
if (single_plane_incident >= 0) { /* function-based BSDF? */ |
363 |
|
void (*evf)(char *s) = single_plane_incident ? |
364 |
|
&eval_isotropic : &eval_anisotropic; |
365 |
< |
if (i != argc-1 || fundefined(argv[i]) != 6) { |
365 |
> |
if (i != argc-1 || fundefined(argv[i]) < 3) { |
366 |
|
fprintf(stderr, |
367 |
|
"%s: need single function with 6 arguments: bsdf(ix,iy,iz,ox,oy,oz)\n", |
368 |
|
progname); |
369 |
+ |
fprintf(stderr, "\tor 3 arguments using Dx,Dy,Dz: bsdf(ix,iy,iz)\n", |
370 |
+ |
progname); |
371 |
|
goto userr; |
372 |
|
} |
373 |
+ |
++eclock; |
374 |
|
xml_prologue(argc, argv); /* start XML output */ |
375 |
|
if (dofwd) { |
376 |
|
input_orient = -1; |