1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: bsdf2ttree.c,v 2.9 2012/11/22 06:07:17 greg Exp $"; |
3 |
#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 <stdio.h> |
12 |
#include <stdlib.h> |
13 |
#include <math.h> |
14 |
#include "platform.h" |
15 |
#include "bsdfrep.h" |
16 |
/* global argv[0] */ |
17 |
char *progname; |
18 |
/* percentage to cull (<0 to turn off) */ |
19 |
double pctcull = 90.; |
20 |
/* sampling order */ |
21 |
int samp_order = 6; |
22 |
|
23 |
/* Interpolate and output isotropic BSDF data */ |
24 |
static void |
25 |
interp_isotropic() |
26 |
{ |
27 |
const int sqres = 1<<samp_order; |
28 |
FILE *ofp = NULL; |
29 |
char cmd[128]; |
30 |
int ix, ox, oy; |
31 |
FVECT ivec, ovec; |
32 |
float bsdf; |
33 |
#if DEBUG |
34 |
fprintf(stderr, "Writing isotropic order %d ", samp_order); |
35 |
if (pctcull >= 0) fprintf(stderr, "data with %.1f%% culling\n", pctcull); |
36 |
else fputs("raw data\n", stderr); |
37 |
#endif |
38 |
if (pctcull >= 0) { /* begin output */ |
39 |
sprintf(cmd, "rttree_reduce -h -a -ff -r 3 -t %f -g %d", |
40 |
pctcull, samp_order); |
41 |
fflush(stdout); |
42 |
ofp = popen(cmd, "w"); |
43 |
if (ofp == NULL) { |
44 |
fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n", |
45 |
progname); |
46 |
exit(1); |
47 |
} |
48 |
SET_FILE_BINARY(ofp); |
49 |
} else |
50 |
fputs("{\n", stdout); |
51 |
/* run through directions */ |
52 |
for (ix = 0; ix < sqres/2; ix++) { |
53 |
RBFNODE *rbf; |
54 |
SDsquare2disk(ivec, (ix+.5)/sqres, .5); |
55 |
ivec[2] = input_orient * |
56 |
sqrt(1. - ivec[0]*ivec[0] - ivec[1]*ivec[1]); |
57 |
rbf = advect_rbf(ivec); |
58 |
for (ox = 0; ox < sqres; ox++) |
59 |
for (oy = 0; oy < sqres; oy++) { |
60 |
SDsquare2disk(ovec, (ox+.5)/sqres, (oy+.5)/sqres); |
61 |
ovec[2] = output_orient * |
62 |
sqrt(1. - ovec[0]*ovec[0] - ovec[1]*ovec[1]); |
63 |
bsdf = eval_rbfrep(rbf, ovec) * output_orient/ovec[2]; |
64 |
if (pctcull >= 0) |
65 |
fwrite(&bsdf, sizeof(bsdf), 1, ofp); |
66 |
else |
67 |
printf("\t%.3e\n", bsdf); |
68 |
} |
69 |
if (rbf != NULL) |
70 |
free(rbf); |
71 |
} |
72 |
if (pctcull >= 0) { /* finish output */ |
73 |
if (pclose(ofp)) { |
74 |
fprintf(stderr, "%s: error running '%s'\n", |
75 |
progname, cmd); |
76 |
exit(1); |
77 |
} |
78 |
} else { |
79 |
for (ix = sqres*sqres*sqres/2; ix--; ) |
80 |
fputs("\t0\n", stdout); |
81 |
fputs("}\n", stdout); |
82 |
} |
83 |
} |
84 |
|
85 |
/* Interpolate and output anisotropic BSDF data */ |
86 |
static void |
87 |
interp_anisotropic() |
88 |
{ |
89 |
const int sqres = 1<<samp_order; |
90 |
FILE *ofp = NULL; |
91 |
char cmd[128]; |
92 |
int ix, iy, ox, oy; |
93 |
FVECT ivec, ovec; |
94 |
float bsdf; |
95 |
#if DEBUG |
96 |
fprintf(stderr, "Writing anisotropic order %d ", samp_order); |
97 |
if (pctcull >= 0) fprintf(stderr, "data with %.1f%% culling\n", pctcull); |
98 |
else fputs("raw data\n", stderr); |
99 |
#endif |
100 |
if (pctcull >= 0) { /* begin output */ |
101 |
sprintf(cmd, "rttree_reduce -h -a -ff -r 4 -t %f -g %d", |
102 |
pctcull, samp_order); |
103 |
fflush(stdout); |
104 |
ofp = popen(cmd, "w"); |
105 |
if (ofp == NULL) { |
106 |
fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n", |
107 |
progname); |
108 |
exit(1); |
109 |
} |
110 |
} else |
111 |
fputs("{\n", stdout); |
112 |
/* run through directions */ |
113 |
for (ix = 0; ix < sqres; ix++) |
114 |
for (iy = 0; iy < sqres; iy++) { |
115 |
RBFNODE *rbf; /* Klems reversal */ |
116 |
SDsquare2disk(ivec, (ix+.5)/sqres, (iy+.5)/sqres); |
117 |
ivec[0] = -ivec[0]; ivec[1] = -ivec[1]; |
118 |
ivec[2] = input_orient * |
119 |
sqrt(1. - ivec[0]*ivec[0] - ivec[1]*ivec[1]); |
120 |
rbf = advect_rbf(ivec); |
121 |
for (ox = 0; ox < sqres; ox++) |
122 |
for (oy = 0; oy < sqres; oy++) { |
123 |
SDsquare2disk(ovec, (ox+.5)/sqres, (oy+.5)/sqres); |
124 |
ovec[2] = output_orient * |
125 |
sqrt(1. - ovec[0]*ovec[0] - ovec[1]*ovec[1]); |
126 |
bsdf = eval_rbfrep(rbf, ovec) * output_orient/ovec[2]; |
127 |
if (pctcull >= 0) |
128 |
fwrite(&bsdf, sizeof(bsdf), 1, ofp); |
129 |
else |
130 |
printf("\t%.3e\n", bsdf); |
131 |
} |
132 |
if (rbf != NULL) |
133 |
free(rbf); |
134 |
} |
135 |
if (pctcull >= 0) { /* finish output */ |
136 |
if (pclose(ofp)) { |
137 |
fprintf(stderr, "%s: error running '%s'\n", |
138 |
progname, cmd); |
139 |
exit(1); |
140 |
} |
141 |
} else |
142 |
fputs("}\n", stdout); |
143 |
} |
144 |
|
145 |
/* Output XML prologue to stdout */ |
146 |
static void |
147 |
xml_prologue(int ac, char *av[]) |
148 |
{ |
149 |
static const char *bsdf_type[4] = { |
150 |
"Reflection Front", |
151 |
"Transmission Front", |
152 |
"Transmission Back", |
153 |
"Reflection Back" |
154 |
}; |
155 |
|
156 |
puts("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); |
157 |
puts("<WindowElement xmlns=\"http://windows.lbl.gov\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://windows.lbl.gov/BSDF-v1.4.xsd\">"); |
158 |
fputs("<!-- File produced by:", stdout); |
159 |
while (ac-- > 0) { |
160 |
fputc(' ', stdout); |
161 |
fputs(*av++, stdout); |
162 |
} |
163 |
puts(" -->"); |
164 |
puts("<WindowElementType>System</WindowElementType>"); |
165 |
puts("<FileType>BSDF</FileType>"); |
166 |
puts("<Optical>"); |
167 |
puts("<Layer>"); |
168 |
puts("\t<Material>"); |
169 |
puts("\t\t<Name>Name</Name>"); |
170 |
puts("\t\t<Manufacturer>Manufacturer</Manufacturer>"); |
171 |
puts("\t\t<DeviceType>Other</DeviceType>"); |
172 |
puts("\t</Material>"); |
173 |
puts("\t<DataDefinition>"); |
174 |
printf("\t\t<IncidentDataStructure>TensorTree%c</IncidentDataStructure>\n", |
175 |
single_plane_incident ? '3' : '4'); |
176 |
puts("\t</DataDefinition>"); |
177 |
puts("\t<WavelengthData>"); |
178 |
puts("\t\t<LayerNumber>System</LayerNumber>"); |
179 |
puts("\t\t<Wavelength unit=\"Integral\">Visible</Wavelength>"); |
180 |
puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>"); |
181 |
puts("\t\t<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum>"); |
182 |
puts("\t\t<WavelengthDataBlock>"); |
183 |
printf("\t\t\t<WavelengthDataDirection>%s</WavelengthDataDirection>\n", |
184 |
bsdf_type[(input_orient>0)<<1 | (output_orient>0)]); |
185 |
puts("\t\t\t<AngleBasis>LBNL/Shirley-Chiu</AngleBasis>"); |
186 |
puts("\t\t\t<ScatteringDataType>BTDF</ScatteringDataType>"); |
187 |
puts("\t\t\t<ScatteringData>"); |
188 |
} |
189 |
|
190 |
/* Output XML epilogue to stdout */ |
191 |
static void |
192 |
xml_epilogue(void) |
193 |
{ |
194 |
puts("\t\t\t</ScatteringData>"); |
195 |
puts("\t\t</WavelengthDataBlock>"); |
196 |
puts("\t</WavelengthData>"); |
197 |
puts("</Layer>"); |
198 |
puts("</Optical>"); |
199 |
puts("</WindowElement>"); |
200 |
} |
201 |
|
202 |
/* Read in BSDF and interpolate as tensor tree representation */ |
203 |
int |
204 |
main(int argc, char *argv[]) |
205 |
{ |
206 |
FILE *fpin = stdin; |
207 |
int i; |
208 |
|
209 |
progname = argv[0]; |
210 |
for (i = 1; i < argc-1 && argv[i][0] == '-'; i++) |
211 |
switch (argv[i][1]) { /* get option */ |
212 |
case 't': |
213 |
pctcull = atof(argv[++i]); |
214 |
break; |
215 |
case 'g': |
216 |
samp_order = atoi(argv[++i]); |
217 |
break; |
218 |
default: |
219 |
goto userr; |
220 |
} |
221 |
|
222 |
if (i == argc-1) { /* open input if given */ |
223 |
fpin = fopen(argv[i], "r"); |
224 |
if (fpin == NULL) { |
225 |
fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n", |
226 |
progname, argv[1]); |
227 |
return(1); |
228 |
} |
229 |
} else if (i < argc-1) |
230 |
goto userr; |
231 |
SET_FILE_BINARY(fpin); /* load BSDF interpolant */ |
232 |
if (!load_bsdf_rep(fpin)) |
233 |
return(1); |
234 |
fclose(fpin); |
235 |
xml_prologue(argc, argv); /* start XML output */ |
236 |
if (single_plane_incident) /* resample dist. */ |
237 |
interp_isotropic(); |
238 |
else |
239 |
interp_anisotropic(); |
240 |
xml_epilogue(); /* finish XML output */ |
241 |
return(0); |
242 |
userr: |
243 |
fprintf(stderr, |
244 |
"Usage: %s [-t pctcull][-g log2grid] [bsdf.sir] > bsdf.xml\n", |
245 |
progname); |
246 |
return(1); |
247 |
} |