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#include "rterror.h" |
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#include "platform.h" |
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#include <stdlib.h> |
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#include <math.h> |
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|
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float *datarr; /* our loaded BSDF data array */ |
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int ttrank = 4; /* tensor tree rank */ |
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int log2g = 4; /* log2 of grid resolution */ |
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int infmt = 'a'; /* input format ('a','f','d') */ |
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double pctcull = 99.; /* target culling percentile */ |
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double pctcull = 95.; /* target culling percentile */ |
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|
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#define HISTLEN 300 /* histogram resolution */ |
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#define HISTMAX 10. /* maximum recorded value in histogram */ |
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|
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int histo[HISTLEN]; /* histogram freq. of max-min BSDF */ |
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|
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double tthresh; /* acceptance threshold (TBD) */ |
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|
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#define dval3(ix,ox,oy) datarr[((((ix)<<log2g)+(ox))<<log2g)+(oy)] |
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#define dval4(ix,iy,ox,oy) datarr[((((((ix)<<log2g)+(iy))<<log2g)+(ox))<<log2g)+(oy)] |
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|
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#define above_threshold(tp) ((tp)->vmax - (tp)->vmin > tthresh) |
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|
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/* Tensor tree node */ |
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typedef struct ttree_s { |
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float vmin, vmax; /* value extrema */ |
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struct ttree_s *kid; /* 2^ttrank children */ |
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} TNODE; |
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|
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#define HISTLEN 300 /* histogram resolution */ |
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#define HISTMAX 10. /* maximum recorded measure in histogram */ |
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|
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int histo[HISTLEN]; /* histogram freq. of variance measure */ |
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|
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double tthresh; /* acceptance threshold (TBD) */ |
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|
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#define var_measure(tp) ( ((tp)->vmax - (tp)->vmin) / \ |
40 |
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(sqrt((tp)->vavg) + .03) ) |
41 |
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#define above_threshold(tp) (var_measure(tp) > tthresh) |
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|
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/* Allocate a new set of children for the given node (no checks) */ |
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static void |
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|
new_kids(TNODE *pn) |
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} |
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tp->vavg /= (float)(1<<ttrank); |
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/* record stats */ |
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< |
i = (HISTLEN/HISTMAX) * (tp->vmax - tp->vmin); |
91 |
> |
i = (HISTLEN/HISTMAX) * var_measure(tp); |
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if (i >= HISTLEN) i = HISTLEN-1; |
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++histo[i]; |
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return; |
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for (i = 0; i < 1<<ttrank; i++) { |
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float val; |
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for (j = ttrank; j--; ) |
155 |
< |
bkmin[j] = bmin[j] + (i>>j & 1); |
155 |
> |
bkmin[j] = bmin[j] + (i>>(ttrank-1-j) & 1); |
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val = (ttrank == 3) ? dval3(bkmin[0],bkmin[1],bkmin[2]) |
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: dval4(bkmin[0],bkmin[1],bkmin[2],bkmin[3]); |
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printf(" %.4e", val); |
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error(SYSTEM, "out of memory in load_data"); |
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if (ttrank == 3) { |
262 |
|
int ix, ox; |
263 |
< |
for (ix = 0; ix < 1<<log2g; ix++) |
263 |
> |
for (ix = 0; ix < 1<<(log2g-1); ix++) |
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|
for (ox = 0; ox < 1<<log2g; ox++) |
265 |
< |
(*readf)(datarr+((((ix)<<log2g)+(ox))<<log2g), |
266 |
< |
1<<(log2g-1)); |
265 |
> |
(*readf)(datarr+(((ix<<log2g)+ox)<<log2g), |
266 |
> |
1<<log2g); |
267 |
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} else /* ttrank == 4 */ { |
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|
int ix, iy, ox; |
269 |
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for (ix = 0; ix < 1<<log2g; ix++) |
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|
for (iy = 0; iy < 1<<log2g; iy++) |
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for (ox = 0; ox < 1<<log2g; ox++) |
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(*readf)(datarr + |
273 |
< |
((((((ix)<<log2g)+(iy))<<log2g)+(ox))<<log2g), |
273 |
> |
(((((ix<<log2g)+iy)<<log2g)+ox)<<log2g), |
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|
1<<log2g); |
275 |
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} |
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(*readf)(NULL, 0); /* releases any buffers */ |
291 |
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error(WARNING, "binary data past end of expected input"); |
292 |
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} |
293 |
|
|
294 |
+ |
/* Enforce reciprocity by averaging data values */ |
295 |
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static void |
296 |
+ |
do_reciprocity() |
297 |
+ |
{ |
298 |
+ |
const int siz = 1<<log2g; |
299 |
+ |
float *v1p, *v2p; |
300 |
+ |
|
301 |
+ |
if (ttrank == 3) { |
302 |
+ |
int ix, ox, oy; |
303 |
+ |
for (ix = 0; ix < siz>>1; ix++) |
304 |
+ |
for (ox = 0; ox < siz; ox++) |
305 |
+ |
for (oy = 0; oy < siz>>1; oy++) { |
306 |
+ |
v1p = &dval3(ix,ox,oy); |
307 |
+ |
v2p = &dval3(ix,ox,siz-1-oy); |
308 |
+ |
*v1p = *v2p = .5f*( *v1p + *v2p ); |
309 |
+ |
} |
310 |
+ |
} else /* ttrank == 4 */ { |
311 |
+ |
int ix, iy, ox, oy; |
312 |
+ |
for (ix = 1; ix < siz; ix++) |
313 |
+ |
for (iy = 1; iy < siz; iy++) |
314 |
+ |
for (ox = 0; ox < ix; ox++) |
315 |
+ |
for (oy = 0; oy < iy; oy++) { |
316 |
+ |
v1p = &dval4(siz-1-ix,siz-1-iy,ox,oy); |
317 |
+ |
v2p = &dval4(siz-1-ox,siz-1-oy,ix,iy); |
318 |
+ |
*v1p = *v2p = .5f*( *v1p + *v2p ); |
319 |
+ |
} |
320 |
+ |
} |
321 |
+ |
} |
322 |
+ |
|
323 |
|
/* Load BSDF array, coalesce uniform regions and format as tensor tree */ |
324 |
|
int |
325 |
|
main(int argc, char *argv[]) |
326 |
|
{ |
327 |
|
int doheader = 1; |
328 |
+ |
int recipavg = 0; |
329 |
|
int bmin[4]; |
330 |
|
TNODE gtree; |
331 |
|
int i; |
332 |
|
/* get options and parameters */ |
333 |
|
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
334 |
|
switch (argv[i][1]) { |
335 |
+ |
case 'a': |
336 |
+ |
recipavg = !recipavg; |
337 |
+ |
break; |
338 |
|
case 'h': |
339 |
|
doheader = !doheader; |
340 |
|
break; |
364 |
|
if (i < argc-1) |
365 |
|
goto userr; |
366 |
|
/* load input data */ |
367 |
< |
if (i == argc-1 && freopen(argv[i], "rb", stdin) == NULL) { |
367 |
> |
if (i == argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
368 |
|
sprintf(errmsg, "cannot open input file '%s'", argv[i]); |
369 |
|
error(SYSTEM, errmsg); |
370 |
|
} |
371 |
|
if (infmt != 'a') |
372 |
|
SET_FILE_BINARY(stdin); |
373 |
+ |
#ifdef getc_unlocked /* avoid lock/unlock overhead */ |
374 |
+ |
flockfile(stdin); |
375 |
+ |
#endif |
376 |
|
load_data(); |
377 |
+ |
if (recipavg) |
378 |
+ |
do_reciprocity(); |
379 |
|
if (doheader) { |
380 |
|
for (i = 0; i < argc; i++) { |
381 |
|
fputs(argv[i], stdout); |
397 |
|
*/ |
398 |
|
return(0); |
399 |
|
userr: |
400 |
< |
fprintf(stderr, "Usage: %s [-h][-f{a|f|d}][-r {3|4}][-g log2grid][-t trim%%] [input]\n", |
400 |
> |
fprintf(stderr, "Usage: %s [-h][-a][-f{a|f|d}][-r {3|4}][-g log2grid][-t trim%%] [input]\n", |
401 |
|
argv[0]); |
402 |
|
return(1); |
403 |
|
} |