1 |
greg |
2.1 |
#ifndef lint |
2 |
greg |
2.3 |
static const char RCSid[] = "$Id: bsdf2klems.c,v 2.2 2013/04/23 04:40:23 greg Exp $"; |
3 |
greg |
2.1 |
#endif |
4 |
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/* |
5 |
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* Load measured BSDF interpolant and write out as XML file with Klems matrix. |
6 |
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* |
7 |
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* G. Ward |
8 |
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*/ |
9 |
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10 |
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#define _USE_MATH_DEFINES |
11 |
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#include <stdio.h> |
12 |
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#include <stdlib.h> |
13 |
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#include <string.h> |
14 |
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#include <math.h> |
15 |
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#include "random.h" |
16 |
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#include "platform.h" |
17 |
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#include "calcomp.h" |
18 |
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#include "bsdfrep.h" |
19 |
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#include "bsdf_m.h" |
20 |
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/* global argv[0] */ |
21 |
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char *progname; |
22 |
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/* selected basis function name */ |
23 |
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static const char *kbasis = "LBNL/Klems Full"; |
24 |
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/* number of BSDF samples per patch */ |
25 |
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static int npsamps = 256; |
26 |
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27 |
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/* Return angle basis corresponding to the given name */ |
28 |
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ANGLE_BASIS * |
29 |
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get_basis(const char *bn) |
30 |
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{ |
31 |
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int n = nabases; |
32 |
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33 |
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while (n-- > 0) |
34 |
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if (!strcasecmp(bn, abase_list[n].name)) |
35 |
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return &abase_list[n]; |
36 |
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return NULL; |
37 |
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} |
38 |
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39 |
greg |
2.3 |
/* Output XML header to stdout */ |
40 |
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static void |
41 |
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xml_header(int ac, char *av[]) |
42 |
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{ |
43 |
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puts("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); |
44 |
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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\">"); |
45 |
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fputs("<!-- File produced by:", stdout); |
46 |
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while (ac-- > 0) { |
47 |
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fputc(' ', stdout); |
48 |
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fputs(*av++, stdout); |
49 |
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} |
50 |
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puts(" -->"); |
51 |
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} |
52 |
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53 |
greg |
2.1 |
/* Output XML prologue to stdout */ |
54 |
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static void |
55 |
greg |
2.3 |
xml_prologue(const SDData *sd) |
56 |
greg |
2.1 |
{ |
57 |
greg |
2.3 |
const char *matn = (sd && sd->matn[0]) ? sd->matn : "Name"; |
58 |
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const char *makr = (sd && sd->makr[0]) ? sd->makr : "Manufacturer"; |
59 |
greg |
2.1 |
ANGLE_BASIS *abp = get_basis(kbasis); |
60 |
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int i; |
61 |
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62 |
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if (abp == NULL) { |
63 |
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fprintf(stderr, "%s: unknown angle basis '%s'\n", progname, kbasis); |
64 |
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exit(1); |
65 |
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} |
66 |
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puts("<WindowElementType>System</WindowElementType>"); |
67 |
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puts("<FileType>BSDF</FileType>"); |
68 |
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puts("<Optical>"); |
69 |
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puts("<Layer>"); |
70 |
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puts("\t<Material>"); |
71 |
greg |
2.3 |
printf("\t\t<Name>%s</Name>\n", matn); |
72 |
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printf("\t\t<Manufacturer>%s</Manufacturer>\n", makr); |
73 |
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if (sd && sd->dim[2] > .001) { |
74 |
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printf("\t\t<Thickness unit=\"meter\">%.3f</Thickness>\n", sd->dim[2]); |
75 |
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printf("\t\t<Width unit=\"meter\">%.3f</Width>\n", sd->dim[0]); |
76 |
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printf("\t\t<Height unit=\"meter\">%.3f</Height>\n", sd->dim[1]); |
77 |
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} |
78 |
greg |
2.1 |
puts("\t\t<DeviceType>Other</DeviceType>"); |
79 |
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puts("\t</Material>"); |
80 |
greg |
2.3 |
if (sd && sd->mgf != NULL) { |
81 |
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puts("\t<Geometry format=\"MGF\">"); |
82 |
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puts("\t\t<MGFblock unit=\"meter\">"); |
83 |
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fputs(sd->mgf, stdout); |
84 |
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puts("</MGFblock>"); |
85 |
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puts("\t</Geometry>"); |
86 |
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} |
87 |
greg |
2.1 |
puts("\t<DataDefinition>"); |
88 |
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puts("\t\t<IncidentDataStructure>Columns</IncidentDataStructure>"); |
89 |
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puts("\t\t<AngleBasis>"); |
90 |
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printf("\t\t\t<AngleBasisName>%s</AngleBasisName>\n", kbasis); |
91 |
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for (i = 0; abp->lat[i].nphis; i++) { |
92 |
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puts("\t\t\t<AngleBasisBlock>"); |
93 |
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printf("\t\t\t<Theta>%g</Theta>\n", i ? |
94 |
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.5*(abp->lat[i].tmin + abp->lat[i+1].tmin) : |
95 |
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.0 ); |
96 |
greg |
2.3 |
printf("\t\t\t<nPhis>%d</nPhis>\n", abp->lat[i].nphis); |
97 |
greg |
2.1 |
puts("\t\t\t<ThetaBounds>"); |
98 |
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printf("\t\t\t\t<LowerTheta>%g</LowerTheta>\n", abp->lat[i].tmin); |
99 |
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printf("\t\t\t\t<UpperTheta>%g</UpperTheta>\n", abp->lat[i+1].tmin); |
100 |
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puts("\t\t\t</ThetaBounds>"); |
101 |
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puts("\t\t\t</AngleBasisBlock>"); |
102 |
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} |
103 |
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puts("\t\t</AngleBasis>"); |
104 |
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puts("\t</DataDefinition>"); |
105 |
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} |
106 |
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|
107 |
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/* Output XML data prologue to stdout */ |
108 |
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static void |
109 |
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data_prologue() |
110 |
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{ |
111 |
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static const char *bsdf_type[4] = { |
112 |
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"Reflection Front", |
113 |
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"Transmission Front", |
114 |
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"Transmission Back", |
115 |
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"Reflection Back" |
116 |
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}; |
117 |
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118 |
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puts("\t<WavelengthData>"); |
119 |
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puts("\t\t<LayerNumber>System</LayerNumber>"); |
120 |
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puts("\t\t<Wavelength unit=\"Integral\">Visible</Wavelength>"); |
121 |
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puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>"); |
122 |
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puts("\t\t<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum>"); |
123 |
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puts("\t\t<WavelengthDataBlock>"); |
124 |
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printf("\t\t\t<WavelengthDataDirection>%s</WavelengthDataDirection>\n", |
125 |
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bsdf_type[(input_orient>0)<<1 | (output_orient>0)]); |
126 |
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printf("\t\t\t<ColumnAngleBasis>%s</ColumnAngleBasis>\n", kbasis); |
127 |
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printf("\t\t\t<RowAngleBasis>%s</RowAngleBasis>\n", kbasis); |
128 |
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puts("\t\t\t<ScatteringDataType>BTDF</ScatteringDataType>"); |
129 |
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puts("\t\t\t<ScatteringData>"); |
130 |
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} |
131 |
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132 |
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/* Output XML data epilogue to stdout */ |
133 |
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static void |
134 |
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data_epilogue(void) |
135 |
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{ |
136 |
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puts("\t\t\t</ScatteringData>"); |
137 |
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puts("\t\t</WavelengthDataBlock>"); |
138 |
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puts("\t</WavelengthData>"); |
139 |
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} |
140 |
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|
141 |
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/* Output XML epilogue to stdout */ |
142 |
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static void |
143 |
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xml_epilogue(void) |
144 |
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{ |
145 |
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puts("</Layer>"); |
146 |
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puts("</Optical>"); |
147 |
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puts("</WindowElement>"); |
148 |
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} |
149 |
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|
150 |
greg |
2.2 |
/* Load and resample XML BSDF description using Klems basis */ |
151 |
greg |
2.1 |
static void |
152 |
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eval_bsdf(const char *fname) |
153 |
|
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{ |
154 |
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ANGLE_BASIS *abp = get_basis(kbasis); |
155 |
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SDData bsd; |
156 |
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SDError ec; |
157 |
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FVECT vin, vout; |
158 |
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SDValue sv; |
159 |
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double sum; |
160 |
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int i, j, n; |
161 |
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162 |
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SDclearBSDF(&bsd, fname); /* load BSDF file */ |
163 |
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if ((ec = SDloadFile(&bsd, fname)) != SDEnone) |
164 |
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goto err; |
165 |
greg |
2.3 |
xml_prologue(&bsd); /* pass geometry */ |
166 |
greg |
2.1 |
/* front reflection */ |
167 |
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if (bsd.rf != NULL || bsd.rLambFront.cieY > .002) { |
168 |
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input_orient = 1; output_orient = 1; |
169 |
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data_prologue(); |
170 |
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for (j = 0; j < abp->nangles; j++) { |
171 |
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for (i = 0; i < abp->nangles; i++) { |
172 |
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sum = 0; /* average over patches */ |
173 |
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for (n = npsamps; n-- > 0; ) { |
174 |
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fo_getvec(vout, j+(n+frandom())/npsamps, abp); |
175 |
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fi_getvec(vin, i+(n+frandom())/npsamps, abp); |
176 |
|
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ec = SDevalBSDF(&sv, vout, vin, &bsd); |
177 |
|
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if (ec != SDEnone) |
178 |
|
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goto err; |
179 |
|
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sum += sv.cieY; |
180 |
|
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} |
181 |
|
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printf("\t%.3e\n", sum/npsamps); |
182 |
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} |
183 |
|
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putchar('\n'); /* extra space between rows */ |
184 |
|
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} |
185 |
|
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data_epilogue(); |
186 |
|
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} |
187 |
|
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/* back reflection */ |
188 |
|
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if (bsd.rb != NULL || bsd.rLambBack.cieY > .002) { |
189 |
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input_orient = -1; output_orient = -1; |
190 |
|
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data_prologue(); |
191 |
|
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for (j = 0; j < abp->nangles; j++) { |
192 |
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for (i = 0; i < abp->nangles; i++) { |
193 |
|
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sum = 0; /* average over patches */ |
194 |
|
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for (n = npsamps; n-- > 0; ) { |
195 |
|
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bo_getvec(vout, j+(n+frandom())/npsamps, abp); |
196 |
|
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bi_getvec(vin, i+(n+frandom())/npsamps, abp); |
197 |
|
|
ec = SDevalBSDF(&sv, vout, vin, &bsd); |
198 |
|
|
if (ec != SDEnone) |
199 |
|
|
goto err; |
200 |
|
|
sum += sv.cieY; |
201 |
|
|
} |
202 |
|
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printf("\t%.3e\n", sum/npsamps); |
203 |
|
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} |
204 |
|
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putchar('\n'); /* extra space between rows */ |
205 |
|
|
} |
206 |
|
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data_epilogue(); |
207 |
|
|
} |
208 |
|
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/* front transmission */ |
209 |
|
|
if (bsd.tf != NULL || bsd.tLamb.cieY > .002) { |
210 |
|
|
input_orient = 1; output_orient = -1; |
211 |
|
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data_prologue(); |
212 |
|
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for (j = 0; j < abp->nangles; j++) { |
213 |
|
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for (i = 0; i < abp->nangles; i++) { |
214 |
|
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sum = 0; /* average over patches */ |
215 |
|
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for (n = npsamps; n-- > 0; ) { |
216 |
|
|
bo_getvec(vout, j+(n+frandom())/npsamps, abp); |
217 |
|
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fi_getvec(vin, i+(n+frandom())/npsamps, abp); |
218 |
|
|
ec = SDevalBSDF(&sv, vout, vin, &bsd); |
219 |
|
|
if (ec != SDEnone) |
220 |
|
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goto err; |
221 |
|
|
sum += sv.cieY; |
222 |
|
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} |
223 |
|
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printf("\t%.3e\n", sum/npsamps); |
224 |
|
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} |
225 |
|
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putchar('\n'); /* extra space between rows */ |
226 |
|
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} |
227 |
|
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data_epilogue(); |
228 |
|
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} |
229 |
|
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/* back transmission */ |
230 |
|
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if (bsd.tb != NULL) { |
231 |
|
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input_orient = -1; output_orient = 1; |
232 |
|
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data_prologue(); |
233 |
|
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for (j = 0; j < abp->nangles; j++) { |
234 |
|
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for (i = 0; i < abp->nangles; i++) { |
235 |
|
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sum = 0; /* average over patches */ |
236 |
|
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for (n = npsamps; n-- > 0; ) { |
237 |
|
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fo_getvec(vout, j+(n+frandom())/npsamps, abp); |
238 |
|
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bi_getvec(vin, i+(n+frandom())/npsamps, abp); |
239 |
|
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ec = SDevalBSDF(&sv, vout, vin, &bsd); |
240 |
|
|
if (ec != SDEnone) |
241 |
|
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goto err; |
242 |
|
|
sum += sv.cieY; |
243 |
|
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} |
244 |
|
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printf("\t%.3e\n", sum/npsamps); |
245 |
|
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} |
246 |
|
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putchar('\n'); /* extra space between rows */ |
247 |
|
|
} |
248 |
|
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data_epilogue(); |
249 |
|
|
} |
250 |
|
|
SDfreeBSDF(&bsd); /* all done */ |
251 |
|
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return; |
252 |
|
|
err: |
253 |
|
|
SDreportError(ec, stderr); |
254 |
|
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exit(1); |
255 |
|
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} |
256 |
|
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|
257 |
greg |
2.2 |
/* Interpolate and output a BSDF function using Klems basis */ |
258 |
greg |
2.1 |
static void |
259 |
|
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eval_function(char *funame) |
260 |
|
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{ |
261 |
|
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ANGLE_BASIS *abp = get_basis(kbasis); |
262 |
|
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double iovec[6]; |
263 |
|
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double sum; |
264 |
|
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int i, j, n; |
265 |
|
|
|
266 |
|
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data_prologue(); /* begin output */ |
267 |
|
|
for (j = 0; j < abp->nangles; j++) { /* run through directions */ |
268 |
|
|
for (i = 0; i < abp->nangles; i++) { |
269 |
|
|
sum = 0; |
270 |
|
|
for (n = npsamps; n--; ) { /* average over patches */ |
271 |
|
|
if (output_orient > 0) |
272 |
|
|
fo_getvec(iovec+3, j+(n+frandom())/npsamps, abp); |
273 |
|
|
else |
274 |
|
|
bo_getvec(iovec+3, j+(n+frandom())/npsamps, abp); |
275 |
|
|
|
276 |
|
|
if (input_orient > 0) |
277 |
greg |
2.2 |
fi_getvec(iovec, i+(n+frandom())/npsamps, abp); |
278 |
greg |
2.1 |
else |
279 |
greg |
2.2 |
bi_getvec(iovec, i+(n+frandom())/npsamps, abp); |
280 |
greg |
2.1 |
|
281 |
|
|
sum += funvalue(funame, 6, iovec); |
282 |
|
|
} |
283 |
|
|
printf("\t%.3e\n", sum/npsamps); |
284 |
|
|
} |
285 |
|
|
putchar('\n'); |
286 |
|
|
} |
287 |
|
|
data_epilogue(); /* finish output */ |
288 |
|
|
} |
289 |
|
|
|
290 |
|
|
/* Interpolate and output a radial basis function BSDF representation */ |
291 |
|
|
static void |
292 |
|
|
eval_rbf(void) |
293 |
|
|
{ |
294 |
greg |
2.2 |
#define MAXPATCHES 145 |
295 |
greg |
2.1 |
ANGLE_BASIS *abp = get_basis(kbasis); |
296 |
greg |
2.2 |
float bsdfarr[MAXPATCHES*MAXPATCHES]; |
297 |
|
|
FVECT vin, vout; |
298 |
|
|
RBFNODE *rbf; |
299 |
greg |
2.1 |
double sum; |
300 |
|
|
int i, j, n; |
301 |
greg |
2.2 |
/* sanity check */ |
302 |
|
|
if (abp->nangles > MAXPATCHES) { |
303 |
|
|
fprintf(stderr, "%s: too many patches!\n", progname); |
304 |
|
|
exit(1); |
305 |
|
|
} |
306 |
|
|
data_prologue(); /* begin output */ |
307 |
|
|
for (i = 0; i < abp->nangles; i++) { |
308 |
|
|
if (input_orient > 0) /* use incident patch center */ |
309 |
|
|
fi_getvec(vin, i+.5*(i>0), abp); |
310 |
|
|
else |
311 |
|
|
bi_getvec(vin, i+.5*(i>0), abp); |
312 |
|
|
|
313 |
|
|
rbf = advect_rbf(vin); /* compute radial basis func */ |
314 |
|
|
|
315 |
|
|
for (j = 0; j < abp->nangles; j++) { |
316 |
|
|
sum = 0; /* sample over exiting patch */ |
317 |
|
|
for (n = npsamps; n--; ) { |
318 |
|
|
if (output_orient > 0) |
319 |
|
|
fo_getvec(vout, j+(n+frandom())/npsamps, abp); |
320 |
|
|
else |
321 |
|
|
bo_getvec(vout, j+(n+frandom())/npsamps, abp); |
322 |
greg |
2.1 |
|
323 |
greg |
2.2 |
sum += eval_rbfrep(rbf, vout) / vout[2]; |
324 |
|
|
} |
325 |
|
|
bsdfarr[j*abp->nangles + i] = sum*output_orient/npsamps; |
326 |
|
|
} |
327 |
|
|
} |
328 |
|
|
n = 0; /* write out our matrix */ |
329 |
|
|
for (j = 0; j < abp->nangles; j++) { |
330 |
|
|
for (i = 0; i < abp->nangles; i++) |
331 |
|
|
printf("\t%.3e\n", bsdfarr[n++]); |
332 |
|
|
putchar('\n'); |
333 |
|
|
} |
334 |
|
|
data_epilogue(); /* finish output */ |
335 |
|
|
#undef MAXPATCHES |
336 |
greg |
2.1 |
} |
337 |
|
|
|
338 |
|
|
/* Read in BSDF and interpolate as Klems matrix representation */ |
339 |
|
|
int |
340 |
|
|
main(int argc, char *argv[]) |
341 |
|
|
{ |
342 |
|
|
int dofwd = 0, dobwd = 1; |
343 |
|
|
char *cp; |
344 |
|
|
int i, na; |
345 |
|
|
|
346 |
|
|
progname = argv[0]; |
347 |
|
|
esupport |= E_VARIABLE|E_FUNCTION|E_RCONST; |
348 |
|
|
esupport &= ~(E_INCHAN|E_OUTCHAN); |
349 |
|
|
scompile("PI:3.14159265358979323846", NULL, 0); |
350 |
|
|
biggerlib(); |
351 |
greg |
2.2 |
for (i = 1; i < argc && (argv[i][0] == '-') | (argv[i][0] == '+'); i++) |
352 |
greg |
2.1 |
switch (argv[i][1]) { /* get options */ |
353 |
|
|
case 'n': |
354 |
|
|
npsamps = atoi(argv[++i]); |
355 |
|
|
if (npsamps <= 0) |
356 |
|
|
goto userr; |
357 |
|
|
break; |
358 |
|
|
case 'e': |
359 |
|
|
scompile(argv[++i], NULL, 0); |
360 |
|
|
single_plane_incident = 0; |
361 |
|
|
break; |
362 |
|
|
case 'f': |
363 |
|
|
if (!argv[i][2]) { |
364 |
|
|
fcompile(argv[++i]); |
365 |
|
|
single_plane_incident = 0; |
366 |
|
|
} else |
367 |
|
|
dofwd = (argv[i][0] == '+'); |
368 |
|
|
break; |
369 |
|
|
case 'b': |
370 |
|
|
dobwd = (argv[i][0] == '+'); |
371 |
|
|
break; |
372 |
|
|
case 'h': |
373 |
|
|
kbasis = "LBNL/Klems Half"; |
374 |
|
|
break; |
375 |
|
|
case 'q': |
376 |
|
|
kbasis = "LBNL/Klems Quarter"; |
377 |
|
|
break; |
378 |
|
|
default: |
379 |
|
|
goto userr; |
380 |
|
|
} |
381 |
|
|
if (single_plane_incident >= 0) { /* function-based BSDF? */ |
382 |
|
|
if (i != argc-1 || fundefined(argv[i]) != 6) { |
383 |
|
|
fprintf(stderr, |
384 |
|
|
"%s: need single function with 6 arguments: bsdf(ix,iy,iz,ox,oy,oz)\n", |
385 |
|
|
progname); |
386 |
|
|
goto userr; |
387 |
|
|
} |
388 |
greg |
2.3 |
xml_header(argc, argv); /* start XML output */ |
389 |
|
|
xml_prologue(NULL); |
390 |
greg |
2.1 |
if (dofwd) { |
391 |
|
|
input_orient = -1; |
392 |
|
|
output_orient = -1; |
393 |
|
|
eval_function(argv[i]); /* outside reflectance */ |
394 |
|
|
output_orient = 1; |
395 |
|
|
eval_function(argv[i]); /* outside -> inside */ |
396 |
|
|
} |
397 |
|
|
if (dobwd) { |
398 |
|
|
input_orient = 1; |
399 |
|
|
output_orient = 1; |
400 |
|
|
eval_function(argv[i]); /* inside reflectance */ |
401 |
|
|
output_orient = -1; |
402 |
|
|
eval_function(argv[i]); /* inside -> outside */ |
403 |
|
|
} |
404 |
|
|
xml_epilogue(); /* finish XML output & exit */ |
405 |
|
|
return(0); |
406 |
|
|
} |
407 |
greg |
2.2 |
/* XML input? */ |
408 |
|
|
if (i == argc-1 && (cp = argv[i]+strlen(argv[i])-4) > argv[i] && |
409 |
|
|
!strcasecmp(cp, ".xml")) { |
410 |
greg |
2.3 |
xml_header(argc, argv); /* start XML output */ |
411 |
greg |
2.1 |
eval_bsdf(argv[i]); /* load & resample BSDF */ |
412 |
|
|
xml_epilogue(); /* finish XML output & exit */ |
413 |
|
|
return(0); |
414 |
|
|
} |
415 |
|
|
if (i < argc) { /* open input files if given */ |
416 |
|
|
int nbsdf = 0; |
417 |
|
|
for ( ; i < argc; i++) { /* interpolate each component */ |
418 |
|
|
FILE *fpin = fopen(argv[i], "rb"); |
419 |
|
|
if (fpin == NULL) { |
420 |
|
|
fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n", |
421 |
|
|
progname, argv[i]); |
422 |
|
|
return(1); |
423 |
|
|
} |
424 |
|
|
if (!load_bsdf_rep(fpin)) |
425 |
|
|
return(1); |
426 |
|
|
fclose(fpin); |
427 |
greg |
2.3 |
if (!nbsdf++) { /* start XML on first dist. */ |
428 |
|
|
xml_header(argc, argv); |
429 |
|
|
xml_prologue(NULL); |
430 |
|
|
} |
431 |
greg |
2.1 |
eval_rbf(); |
432 |
|
|
} |
433 |
|
|
xml_epilogue(); /* finish XML output & exit */ |
434 |
|
|
return(0); |
435 |
|
|
} |
436 |
|
|
SET_FILE_BINARY(stdin); /* load from stdin */ |
437 |
|
|
if (!load_bsdf_rep(stdin)) |
438 |
|
|
return(1); |
439 |
greg |
2.3 |
xml_header(argc, argv); /* start XML output */ |
440 |
|
|
xml_prologue(NULL); |
441 |
greg |
2.1 |
eval_rbf(); /* resample dist. */ |
442 |
|
|
xml_epilogue(); /* finish XML output & exit */ |
443 |
|
|
return(0); |
444 |
|
|
userr: |
445 |
|
|
fprintf(stderr, |
446 |
greg |
2.3 |
"Usage: %s [-n spp][-h|-q][bsdf.sir ..] > bsdf.xml\n", progname); |
447 |
greg |
2.1 |
fprintf(stderr, |
448 |
greg |
2.3 |
" or: %s [-n spp][-h|-q] bsdf_in.xml > bsdf_out.xml\n", progname); |
449 |
greg |
2.1 |
fprintf(stderr, |
450 |
|
|
" or: %s [-n spp][-h|-q][{+|-}for[ward]][{+|-}b[ackward]][-e expr][-f file] bsdf_func > bsdf.xml\n", |
451 |
|
|
progname); |
452 |
|
|
return(1); |
453 |
|
|
} |