11 |
|
#include "rterror.h" |
12 |
|
#include "platform.h" |
13 |
|
#include <stdlib.h> |
14 |
+ |
#include <math.h> |
15 |
|
|
16 |
|
float *datarr; /* our loaded BSDF data array */ |
17 |
|
int ttrank = 4; /* tensor tree rank */ |
18 |
|
int log2g = 4; /* log2 of grid resolution */ |
19 |
|
int infmt = 'a'; /* input format ('a','f','d') */ |
20 |
< |
double pctcull = 99.; /* target culling percentile */ |
20 |
> |
double pctcull = 95.; /* target culling percentile */ |
21 |
|
|
21 |
– |
#define HISTLEN 300 /* histogram resolution */ |
22 |
– |
#define HISTMAX 10. /* maximum recorded value in histogram */ |
23 |
– |
|
24 |
– |
int histo[HISTLEN]; /* histogram freq. of max-min BSDF */ |
25 |
– |
|
26 |
– |
double tthresh; /* acceptance threshold (TBD) */ |
27 |
– |
|
22 |
|
#define dval3(ix,ox,oy) datarr[((((ix)<<log2g)+(ox))<<log2g)+(oy)] |
23 |
|
#define dval4(ix,iy,ox,oy) datarr[((((((ix)<<log2g)+(iy))<<log2g)+(ox))<<log2g)+(oy)] |
24 |
|
|
31 |
– |
#define above_threshold(tp) ((tp)->vmax - (tp)->vmin > tthresh) |
32 |
– |
|
25 |
|
/* Tensor tree node */ |
26 |
|
typedef struct ttree_s { |
27 |
|
float vmin, vmax; /* value extrema */ |
29 |
|
struct ttree_s *kid; /* 2^ttrank children */ |
30 |
|
} TNODE; |
31 |
|
|
32 |
+ |
#define HISTLEN 300 /* histogram resolution */ |
33 |
+ |
#define HISTMAX 10. /* maximum recorded measure in histogram */ |
34 |
+ |
|
35 |
+ |
int histo[HISTLEN]; /* histogram freq. of variance measure */ |
36 |
+ |
|
37 |
+ |
double tthresh; /* acceptance threshold (TBD) */ |
38 |
+ |
|
39 |
+ |
#define var_measure(tp) ( ((tp)->vmax - (tp)->vmin) / \ |
40 |
+ |
(sqrt((tp)->vavg) + .03) ) |
41 |
+ |
#define above_threshold(tp) (var_measure(tp) > tthresh) |
42 |
+ |
|
43 |
|
/* Allocate a new set of children for the given node (no checks) */ |
44 |
|
static void |
45 |
|
new_kids(TNODE *pn) |
88 |
|
} |
89 |
|
tp->vavg /= (float)(1<<ttrank); |
90 |
|
/* record stats */ |
91 |
< |
i = (HISTLEN/HISTMAX) * (tp->vmax - tp->vmin); |
91 |
> |
i = (HISTLEN/HISTMAX) * var_measure(tp); |
92 |
|
if (i >= HISTLEN) i = HISTLEN-1; |
93 |
|
++histo[i]; |
94 |
|
return; |
260 |
|
error(SYSTEM, "out of memory in load_data"); |
261 |
|
if (ttrank == 3) { |
262 |
|
int ix, ox; |
263 |
< |
for (ix = 0; ix < 1<<log2g; ix++) |
263 |
> |
for (ix = 0; ix < 1<<(log2g-1); ix++) |
264 |
|
for (ox = 0; ox < 1<<log2g; ox++) |
265 |
|
(*readf)(datarr+((((ix)<<log2g)+(ox))<<log2g), |
266 |
< |
1<<(log2g-1)); |
266 |
> |
1<<log2g); |
267 |
|
} else /* ttrank == 4 */ { |
268 |
|
int ix, iy, ox; |
269 |
|
for (ix = 0; ix < 1<<log2g; ix++) |