1 |
greg |
2.1 |
#ifndef lint |
2 |
greg |
2.30 |
static const char RCSid[] = "$Id: bsdf2rad.c,v 2.29 2017/04/12 05:01:45 greg Exp $"; |
3 |
greg |
2.1 |
#endif |
4 |
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/* |
5 |
greg |
2.4 |
* Plot 3-D BSDF output based on scattering interpolant or XML representation |
6 |
greg |
2.1 |
*/ |
7 |
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8 |
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#include <stdio.h> |
9 |
greg |
2.4 |
#include <string.h> |
10 |
greg |
2.1 |
#include <stdlib.h> |
11 |
greg |
2.16 |
#include "paths.h" |
12 |
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#include "rtmath.h" |
13 |
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#include "resolu.h" |
14 |
greg |
2.1 |
#include "bsdfrep.h" |
15 |
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16 |
greg |
2.18 |
#define NINCIDENT 37 /* number of samples/hemisphere */ |
17 |
greg |
2.1 |
|
18 |
greg |
2.16 |
#define GRIDSTEP 2 /* our grid step size */ |
19 |
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#define SAMPRES (GRIDRES/GRIDSTEP) |
20 |
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21 |
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int front_comp = 0; /* front component flags (SDsamp*) */ |
22 |
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int back_comp = 0; /* back component flags */ |
23 |
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double overall_min = 1./PI; /* overall minimum BSDF value */ |
24 |
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double min_log10; /* smallest log10 value for plotting */ |
25 |
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double overall_max = .0; /* overall maximum BSDF value */ |
26 |
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27 |
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char ourTempDir[TEMPLEN] = ""; /* our temporary directory */ |
28 |
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29 |
greg |
2.26 |
const char frpref[] = "rf"; |
30 |
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const char ftpref[] = "tf"; |
31 |
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const char brpref[] = "rb"; |
32 |
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const char btpref[] = "tb"; |
33 |
greg |
2.16 |
const char dsuffix[] = ".txt"; |
34 |
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35 |
greg |
2.24 |
const char sph_fmat[] = "fBSDFmat"; |
36 |
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const char sph_bmat[] = "bBSDFmat"; |
37 |
greg |
2.16 |
const double sph_rad = 10.; |
38 |
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const double sph_xoffset = 15.; |
39 |
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40 |
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#define bsdf_rad (sph_rad*.25) |
41 |
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#define arrow_rad (bsdf_rad*.015) |
42 |
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43 |
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#define FEQ(a,b) ((a)-(b) <= 1e-7 && (b)-(a) <= 1e-7) |
44 |
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45 |
greg |
2.30 |
#define set_minlog() overall_min = (overall_min < 1e-5) ? 1e-5 : overall_min; \ |
46 |
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min_log10 = log10(overall_min) - .1 |
47 |
greg |
2.16 |
|
48 |
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char *progname; |
49 |
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50 |
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/* Get Fibonacci sphere vector (0 to NINCIDENT-1) */ |
51 |
greg |
2.19 |
static RREAL * |
52 |
greg |
2.16 |
get_ivector(FVECT iv, int i) |
53 |
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{ |
54 |
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const double phistep = PI*(3. - 2.236067978); |
55 |
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double r; |
56 |
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57 |
greg |
2.18 |
iv[2] = 1. - (i+.5)*(1./NINCIDENT); |
58 |
greg |
2.16 |
r = sqrt(1. - iv[2]*iv[2]); |
59 |
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iv[0] = r * cos((i+1.)*phistep); |
60 |
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iv[1] = r * sin((i+1.)*phistep); |
61 |
greg |
2.19 |
|
62 |
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return(iv); |
63 |
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} |
64 |
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65 |
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/* Convert incident vector into sphere position */ |
66 |
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static RREAL * |
67 |
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cvt_sposition(FVECT sp, const FVECT iv, int inc_side) |
68 |
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{ |
69 |
greg |
2.20 |
sp[0] = -iv[0]*sph_rad + inc_side*sph_xoffset; |
70 |
greg |
2.19 |
sp[1] = -iv[1]*sph_rad; |
71 |
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sp[2] = iv[2]*sph_rad; |
72 |
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73 |
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return(sp); |
74 |
greg |
2.16 |
} |
75 |
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76 |
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/* Get temporary file name */ |
77 |
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static char * |
78 |
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tfile_name(const char *prefix, const char *suffix, int i) |
79 |
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{ |
80 |
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static char buf[128]; |
81 |
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82 |
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if (!ourTempDir[0]) { /* create temporary directory */ |
83 |
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mktemp(strcpy(ourTempDir,TEMPLATE)); |
84 |
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if (mkdir(ourTempDir, 0777) < 0) { |
85 |
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perror("mkdir"); |
86 |
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exit(1); |
87 |
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} |
88 |
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} |
89 |
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if (!prefix) prefix = "T"; |
90 |
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if (!suffix) suffix = ""; |
91 |
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sprintf(buf, "%s/%s%03d%s", ourTempDir, prefix, i, suffix); |
92 |
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return(buf); |
93 |
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} |
94 |
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95 |
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/* Remove temporary directory & contents */ |
96 |
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static void |
97 |
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cleanup_tmp(void) |
98 |
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{ |
99 |
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char buf[128]; |
100 |
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101 |
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if (!ourTempDir[0]) |
102 |
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return; |
103 |
schorsch |
2.15 |
#if defined(_WIN32) || defined(_WIN64) |
104 |
greg |
2.16 |
sprintf(buf, "RMDIR %s /S /Q", ourTempDir); |
105 |
greg |
2.11 |
#else |
106 |
greg |
2.16 |
sprintf(buf, "rm -rf %s", ourTempDir); |
107 |
greg |
2.11 |
#endif |
108 |
greg |
2.16 |
system(buf); |
109 |
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} |
110 |
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111 |
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/* Run the specified command, returning 1 if OK */ |
112 |
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static int |
113 |
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run_cmd(const char *cmd) |
114 |
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{ |
115 |
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fflush(stdout); |
116 |
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if (system(cmd)) { |
117 |
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fprintf(stderr, "%s: error running: %s\n", progname, cmd); |
118 |
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return(0); |
119 |
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} |
120 |
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return(1); |
121 |
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} |
122 |
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123 |
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/* Plot surface points for the given BSDF incident angle */ |
124 |
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static int |
125 |
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plotBSDF(const char *fname, const FVECT ivec, int dfl, const SDData *sd) |
126 |
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{ |
127 |
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FILE *fp = fopen(fname, "w"); |
128 |
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int i, j; |
129 |
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130 |
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if (fp == NULL) { |
131 |
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fprintf(stderr, "%s: cannot open '%s' for writing\n", |
132 |
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progname, fname); |
133 |
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return(0); |
134 |
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} |
135 |
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if (ivec[2] > 0) { |
136 |
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input_orient = 1; |
137 |
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output_orient = dfl&SDsampR ? 1 : -1; |
138 |
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} else { |
139 |
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input_orient = -1; |
140 |
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output_orient = dfl&SDsampR ? -1 : 1; |
141 |
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} |
142 |
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for (i = SAMPRES; i--; ) |
143 |
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for (j = 0; j < SAMPRES; j++) { |
144 |
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FVECT ovec; |
145 |
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SDValue sval; |
146 |
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double bsdf; |
147 |
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ovec_from_pos(ovec, i*GRIDSTEP, j*GRIDSTEP); |
148 |
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if (SDreportError(SDevalBSDF(&sval, ovec, |
149 |
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ivec, sd), stderr)) |
150 |
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return(0); |
151 |
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if (sval.cieY > overall_max) |
152 |
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overall_max = sval.cieY; |
153 |
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bsdf = (sval.cieY < overall_min) ? overall_min : sval.cieY; |
154 |
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bsdf = log10(bsdf) - min_log10; |
155 |
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fprintf(fp, "%.5f %.5f %.5f\n", |
156 |
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ovec[0]*bsdf, ovec[1]*bsdf, ovec[2]*bsdf); |
157 |
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} |
158 |
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if (fclose(fp) == EOF) { |
159 |
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fprintf(stderr, "%s: error writing data to '%s'\n", |
160 |
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progname, fname); |
161 |
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return(0); |
162 |
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} |
163 |
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return(1); |
164 |
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} |
165 |
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166 |
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/* Build BSDF values from loaded XML file */ |
167 |
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static int |
168 |
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build_wBSDF(const SDData *sd) |
169 |
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{ |
170 |
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FVECT ivec; |
171 |
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int i; |
172 |
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173 |
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if (front_comp & SDsampR) |
174 |
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for (i = 0; i < NINCIDENT; i++) { |
175 |
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get_ivector(ivec, i); |
176 |
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if (!plotBSDF(tfile_name(frpref, dsuffix, i), |
177 |
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ivec, SDsampR, sd)) |
178 |
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return(0); |
179 |
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} |
180 |
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if (front_comp & SDsampT) |
181 |
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for (i = 0; i < NINCIDENT; i++) { |
182 |
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get_ivector(ivec, i); |
183 |
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if (!plotBSDF(tfile_name(ftpref, dsuffix, i), |
184 |
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ivec, SDsampT, sd)) |
185 |
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return(0); |
186 |
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} |
187 |
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if (back_comp & SDsampR) |
188 |
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for (i = 0; i < NINCIDENT; i++) { |
189 |
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get_ivector(ivec, i); |
190 |
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ivec[0] = -ivec[0]; ivec[2] = -ivec[2]; |
191 |
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if (!plotBSDF(tfile_name(brpref, dsuffix, i), |
192 |
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ivec, SDsampR, sd)) |
193 |
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return(0); |
194 |
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} |
195 |
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if (back_comp & SDsampT) |
196 |
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for (i = 0; i < NINCIDENT; i++) { |
197 |
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get_ivector(ivec, i); |
198 |
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ivec[0] = -ivec[0]; ivec[2] = -ivec[2]; |
199 |
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if (!plotBSDF(tfile_name(btpref, dsuffix, i), |
200 |
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ivec, SDsampT, sd)) |
201 |
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return(0); |
202 |
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} |
203 |
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return(1); |
204 |
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} |
205 |
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206 |
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/* Plot surface points using radial basis function */ |
207 |
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static int |
208 |
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plotRBF(const char *fname, const RBFNODE *rbf) |
209 |
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{ |
210 |
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FILE *fp = fopen(fname, "w"); |
211 |
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int i, j; |
212 |
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213 |
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if (fp == NULL) { |
214 |
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fprintf(stderr, "%s: cannot open '%s' for writing\n", |
215 |
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progname, fname); |
216 |
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return(0); |
217 |
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} |
218 |
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for (i = SAMPRES; i--; ) |
219 |
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for (j = 0; j < SAMPRES; j++) { |
220 |
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FVECT ovec; |
221 |
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double bsdf; |
222 |
|
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ovec_from_pos(ovec, i*GRIDSTEP, j*GRIDSTEP); |
223 |
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bsdf = eval_rbfrep(rbf, ovec); |
224 |
|
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if (bsdf > overall_max) |
225 |
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overall_max = bsdf; |
226 |
|
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else if (bsdf < overall_min) |
227 |
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bsdf = overall_min; |
228 |
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bsdf = log10(bsdf) - min_log10; |
229 |
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fprintf(fp, "%.5f %.5f %.5f\n", |
230 |
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ovec[0]*bsdf, ovec[1]*bsdf, ovec[2]*bsdf); |
231 |
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} |
232 |
|
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if (fclose(fp) == EOF) { |
233 |
|
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fprintf(stderr, "%s: error writing data to '%s'\n", |
234 |
|
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progname, fname); |
235 |
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return(0); |
236 |
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} |
237 |
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return(1); |
238 |
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} |
239 |
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|
240 |
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/* Build BSDF values from scattering interpolant representation */ |
241 |
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static int |
242 |
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build_wRBF(void) |
243 |
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{ |
244 |
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const char *pref; |
245 |
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int i; |
246 |
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247 |
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if (input_orient > 0) { |
248 |
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if (output_orient > 0) |
249 |
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pref = frpref; |
250 |
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else |
251 |
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pref = ftpref; |
252 |
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} else if (output_orient < 0) |
253 |
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pref = brpref; |
254 |
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else |
255 |
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pref = btpref; |
256 |
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257 |
|
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for (i = 0; i < NINCIDENT; i++) { |
258 |
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FVECT ivec; |
259 |
|
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RBFNODE *rbf; |
260 |
|
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get_ivector(ivec, i); |
261 |
|
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if (input_orient < 0) { |
262 |
greg |
2.19 |
ivec[0] = -ivec[0]; ivec[2] = -ivec[2]; |
263 |
greg |
2.16 |
} |
264 |
|
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rbf = advect_rbf(ivec, 15000); |
265 |
|
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if (!plotRBF(tfile_name(pref, dsuffix, i), rbf)) |
266 |
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return(0); |
267 |
|
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if (rbf) free(rbf); |
268 |
|
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} |
269 |
|
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return(1); /* next call frees */ |
270 |
|
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} |
271 |
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272 |
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/* Put out mirror arrow for the given incident vector */ |
273 |
|
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static void |
274 |
greg |
2.25 |
put_mirror_arrow(const FVECT origin, const FVECT nrm) |
275 |
greg |
2.16 |
{ |
276 |
|
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const double arrow_len = 1.2*bsdf_rad; |
277 |
|
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const double tip_len = 0.2*bsdf_rad; |
278 |
greg |
2.25 |
FVECT refl; |
279 |
greg |
2.16 |
int i; |
280 |
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|
281 |
greg |
2.25 |
refl[0] = 2.*nrm[2]*nrm[0]; |
282 |
|
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refl[1] = 2.*nrm[2]*nrm[1]; |
283 |
|
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refl[2] = 2.*nrm[2]*nrm[2] - 1.; |
284 |
greg |
2.16 |
|
285 |
|
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printf("\n# Mirror arrow\n"); |
286 |
greg |
2.29 |
printf("\nshaft_mat cylinder inc_dir\n0\n0\n7"); |
287 |
greg |
2.16 |
printf("\n\t%f %f %f\n\t%f %f %f\n\t%f\n", |
288 |
|
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origin[0], origin[1], origin[2]+arrow_len, |
289 |
|
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origin[0], origin[1], origin[2], |
290 |
|
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arrow_rad); |
291 |
greg |
2.29 |
printf("\nshaft_mat cylinder mir_dir\n0\n0\n7"); |
292 |
greg |
2.16 |
printf("\n\t%f %f %f\n\t%f %f %f\n\t%f\n", |
293 |
|
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origin[0], origin[1], origin[2], |
294 |
|
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origin[0] + arrow_len*refl[0], |
295 |
|
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origin[1] + arrow_len*refl[1], |
296 |
|
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origin[2] + arrow_len*refl[2], |
297 |
|
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arrow_rad); |
298 |
greg |
2.29 |
printf("\ntip_mat cone mir_tip\n0\n0\n8"); |
299 |
greg |
2.16 |
printf("\n\t%f %f %f\n\t%f %f %f\n\t%f 0\n", |
300 |
|
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origin[0] + (arrow_len-.5*tip_len)*refl[0], |
301 |
|
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origin[1] + (arrow_len-.5*tip_len)*refl[1], |
302 |
|
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origin[2] + (arrow_len-.5*tip_len)*refl[2], |
303 |
|
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origin[0] + (arrow_len+.5*tip_len)*refl[0], |
304 |
|
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origin[1] + (arrow_len+.5*tip_len)*refl[1], |
305 |
|
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origin[2] + (arrow_len+.5*tip_len)*refl[2], |
306 |
|
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2.*arrow_rad); |
307 |
|
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} |
308 |
|
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|
309 |
|
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/* Put out transmitted direction arrow for the given incident vector */ |
310 |
|
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static void |
311 |
greg |
2.25 |
put_trans_arrow(const FVECT origin) |
312 |
greg |
2.16 |
{ |
313 |
|
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const double arrow_len = 1.2*bsdf_rad; |
314 |
|
|
const double tip_len = 0.2*bsdf_rad; |
315 |
|
|
int i; |
316 |
|
|
|
317 |
|
|
printf("\n# Transmission arrow\n"); |
318 |
greg |
2.29 |
printf("\nshaft_mat cylinder trans_dir\n0\n0\n7"); |
319 |
greg |
2.16 |
printf("\n\t%f %f %f\n\t%f %f %f\n\t%f\n", |
320 |
|
|
origin[0], origin[1], origin[2], |
321 |
|
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origin[0], origin[1], origin[2]-arrow_len, |
322 |
|
|
arrow_rad); |
323 |
greg |
2.29 |
printf("\ntip_mat cone trans_tip\n0\n0\n8"); |
324 |
greg |
2.16 |
printf("\n\t%f %f %f\n\t%f %f %f\n\t%f 0\n", |
325 |
|
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origin[0], origin[1], origin[2]-arrow_len+.5*tip_len, |
326 |
|
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origin[0], origin[1], origin[2]-arrow_len-.5*tip_len, |
327 |
|
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2.*arrow_rad); |
328 |
|
|
} |
329 |
|
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|
330 |
|
|
/* Compute rotation (x,y,z) => (xp,yp,zp) */ |
331 |
|
|
static int |
332 |
|
|
addrot(char *xf, const FVECT xp, const FVECT yp, const FVECT zp) |
333 |
|
|
{ |
334 |
|
|
int n = 0; |
335 |
|
|
double theta; |
336 |
greg |
2.10 |
|
337 |
greg |
2.16 |
if (yp[2]*yp[2] + zp[2]*zp[2] < 2.*FTINY*FTINY) { |
338 |
|
|
/* Special case for X' along Z-axis */ |
339 |
|
|
theta = -atan2(yp[0], yp[1]); |
340 |
|
|
sprintf(xf, " -ry %f -rz %f", |
341 |
|
|
xp[2] < 0.0 ? 90.0 : -90.0, |
342 |
|
|
theta*(180./PI)); |
343 |
|
|
return(4); |
344 |
|
|
} |
345 |
|
|
theta = atan2(yp[2], zp[2]); |
346 |
|
|
if (!FEQ(theta,0.0)) { |
347 |
|
|
sprintf(xf, " -rx %f", theta*(180./PI)); |
348 |
|
|
while (*xf) ++xf; |
349 |
|
|
n += 2; |
350 |
|
|
} |
351 |
|
|
theta = Asin(-xp[2]); |
352 |
|
|
if (!FEQ(theta,0.0)) { |
353 |
|
|
sprintf(xf, " -ry %f", theta*(180./PI)); |
354 |
|
|
while (*xf) ++xf; |
355 |
|
|
n += 2; |
356 |
|
|
} |
357 |
|
|
theta = atan2(xp[1], xp[0]); |
358 |
|
|
if (!FEQ(theta,0.0)) { |
359 |
|
|
sprintf(xf, " -rz %f", theta*(180./PI)); |
360 |
|
|
/* while (*xf) ++xf; */ |
361 |
|
|
n += 2; |
362 |
|
|
} |
363 |
|
|
return(n); |
364 |
|
|
} |
365 |
|
|
|
366 |
|
|
/* Put out BSDF surfaces */ |
367 |
|
|
static int |
368 |
|
|
put_BSDFs(void) |
369 |
|
|
{ |
370 |
|
|
const double scalef = bsdf_rad/(log10(overall_max) - min_log10); |
371 |
greg |
2.25 |
FVECT ivec, sorg, nrm, upv; |
372 |
greg |
2.16 |
RREAL vMtx[3][3]; |
373 |
|
|
char *fname; |
374 |
|
|
char cmdbuf[256]; |
375 |
greg |
2.25 |
char rotargs[64]; |
376 |
|
|
int nrota; |
377 |
greg |
2.16 |
int i; |
378 |
|
|
|
379 |
|
|
printf("\n# Gensurf output corresponding to %d incident directions\n", |
380 |
|
|
NINCIDENT); |
381 |
|
|
|
382 |
greg |
2.29 |
printf("\nvoid glow tip_mat\n0\n0\n4 1 0 1 0\n"); |
383 |
|
|
printf("\nvoid mixfunc shaft_mat\n4 tip_mat void 0.25 .\n0\n0\n"); |
384 |
greg |
2.16 |
|
385 |
greg |
2.25 |
for (i = 0; i < NINCIDENT; i++) { |
386 |
|
|
get_ivector(ivec, i); |
387 |
|
|
nrm[0] = -ivec[0]; nrm[1] = -ivec[1]; nrm[2] = ivec[2]; |
388 |
|
|
upv[0] = nrm[0]*nrm[1]*(nrm[2] - 1.); |
389 |
|
|
upv[1] = nrm[0]*nrm[0] + nrm[1]*nrm[1]*nrm[2]; |
390 |
|
|
upv[2] = -nrm[1]*(nrm[0]*nrm[0] + nrm[1]*nrm[1]); |
391 |
|
|
if (SDcompXform(vMtx, nrm, upv) != SDEnone) |
392 |
|
|
continue; |
393 |
|
|
nrota = addrot(rotargs, vMtx[0], vMtx[1], vMtx[2]); |
394 |
|
|
if (front_comp) { |
395 |
greg |
2.19 |
cvt_sposition(sorg, ivec, 1); |
396 |
greg |
2.16 |
printf("\nvoid colorfunc scale_pat\n"); |
397 |
greg |
2.25 |
printf("10 bsdf_red bsdf_grn bsdf_blu bsdf2rad.cal\n"); |
398 |
|
|
printf("\t-s %f -t %f %f %f\n0\n0\n", |
399 |
|
|
bsdf_rad, sorg[0], sorg[1], sorg[2]); |
400 |
greg |
2.16 |
printf("\nscale_pat glow scale_mat\n0\n0\n4 1 1 1 0\n"); |
401 |
greg |
2.25 |
} |
402 |
|
|
if (front_comp & SDsampR) { |
403 |
|
|
put_mirror_arrow(sorg, nrm); |
404 |
greg |
2.16 |
fname = tfile_name(frpref, dsuffix, i); |
405 |
greg |
2.25 |
sprintf(cmdbuf, |
406 |
|
|
"gensurf scale_mat %s%d %s %s %s %d %d | xform %s -s %f -t %f %f %f", |
407 |
greg |
2.20 |
frpref, i, fname, fname, fname, SAMPRES-1, SAMPRES-1, |
408 |
greg |
2.25 |
rotargs, scalef, sorg[0], sorg[1], sorg[2]); |
409 |
greg |
2.16 |
if (!run_cmd(cmdbuf)) |
410 |
|
|
return(0); |
411 |
|
|
} |
412 |
greg |
2.25 |
if (front_comp & SDsampT) { |
413 |
|
|
put_trans_arrow(sorg); |
414 |
greg |
2.16 |
fname = tfile_name(ftpref, dsuffix, i); |
415 |
greg |
2.25 |
sprintf(cmdbuf, |
416 |
|
|
"gensurf scale_mat %s%d %s %s %s %d %d | xform -I %s -s %f -t %f %f %f", |
417 |
greg |
2.20 |
ftpref, i, fname, fname, fname, SAMPRES-1, SAMPRES-1, |
418 |
greg |
2.25 |
rotargs, scalef, sorg[0], sorg[1], sorg[2]); |
419 |
greg |
2.16 |
if (!run_cmd(cmdbuf)) |
420 |
|
|
return(0); |
421 |
|
|
} |
422 |
greg |
2.25 |
if (back_comp) { |
423 |
greg |
2.19 |
cvt_sposition(sorg, ivec, -1); |
424 |
greg |
2.16 |
printf("\nvoid colorfunc scale_pat\n"); |
425 |
greg |
2.25 |
printf("10 bsdf_red bsdf_grn bsdf_blu bsdf2rad.cal\n"); |
426 |
|
|
printf("\t-s %f -t %f %f %f\n0\n0\n", |
427 |
|
|
bsdf_rad, sorg[0], sorg[1], sorg[2]); |
428 |
greg |
2.16 |
printf("\nscale_pat glow scale_mat\n0\n0\n4 1 1 1 0\n"); |
429 |
greg |
2.25 |
} |
430 |
|
|
if (back_comp & SDsampR) { |
431 |
|
|
put_mirror_arrow(sorg, nrm); |
432 |
greg |
2.16 |
fname = tfile_name(brpref, dsuffix, i); |
433 |
greg |
2.25 |
sprintf(cmdbuf, |
434 |
|
|
"gensurf scale_mat %s%d %s %s %s %d %d | xform -I -ry 180 %s -s %f -t %f %f %f", |
435 |
greg |
2.20 |
brpref, i, fname, fname, fname, SAMPRES-1, SAMPRES-1, |
436 |
greg |
2.25 |
rotargs, scalef, sorg[0], sorg[1], sorg[2]); |
437 |
greg |
2.16 |
if (!run_cmd(cmdbuf)) |
438 |
|
|
return(0); |
439 |
|
|
} |
440 |
greg |
2.25 |
if (back_comp & SDsampT) { |
441 |
|
|
put_trans_arrow(sorg); |
442 |
greg |
2.16 |
fname = tfile_name(btpref, dsuffix, i); |
443 |
greg |
2.25 |
sprintf(cmdbuf, |
444 |
|
|
"gensurf scale_mat %s%d %s %s %s %d %d | xform -ry 180 %s -s %f -t %f %f %f", |
445 |
greg |
2.20 |
btpref, i, fname, fname, fname, SAMPRES-1, SAMPRES-1, |
446 |
greg |
2.25 |
rotargs, scalef, sorg[0], sorg[1], sorg[2]); |
447 |
greg |
2.16 |
if (!run_cmd(cmdbuf)) |
448 |
|
|
return(0); |
449 |
|
|
} |
450 |
greg |
2.25 |
} |
451 |
greg |
2.16 |
return(1); |
452 |
|
|
} |
453 |
|
|
|
454 |
|
|
/* Put our hemisphere material */ |
455 |
|
|
static void |
456 |
|
|
put_matBSDF(const char *XMLfile) |
457 |
|
|
{ |
458 |
|
|
const char *curdir = "./"; |
459 |
|
|
|
460 |
|
|
if (!XMLfile) { /* simple material */ |
461 |
|
|
printf("\n# Simplified material because we have no XML input\n"); |
462 |
|
|
printf("\nvoid brightfunc latlong\n2 latlong bsdf2rad.cal\n0\n0\n"); |
463 |
|
|
if ((front_comp|back_comp) & SDsampT) |
464 |
greg |
2.20 |
printf("\nlatlong trans %s\n0\n0\n7 .75 .75 .75 0 .04 .5 .8\n", |
465 |
greg |
2.24 |
sph_fmat); |
466 |
greg |
2.16 |
else |
467 |
|
|
printf("\nlatlong plastic %s\n0\n0\n5 .5 .5 .5 0 0\n", |
468 |
greg |
2.24 |
sph_fmat); |
469 |
|
|
printf("\ninherit alias %s %s\n", sph_bmat, sph_fmat); |
470 |
greg |
2.16 |
return; |
471 |
|
|
} |
472 |
|
|
switch (XMLfile[0]) { /* avoid RAYPATH search */ |
473 |
|
|
case '.': |
474 |
greg |
2.28 |
case '~': |
475 |
greg |
2.16 |
CASEDIRSEP: |
476 |
|
|
curdir = ""; |
477 |
|
|
break; |
478 |
|
|
case '\0': |
479 |
|
|
fprintf(stderr, "%s: empty file name in put_matBSDF\n", progname); |
480 |
|
|
exit(1); |
481 |
|
|
break; |
482 |
|
|
} |
483 |
greg |
2.24 |
printf("\n# Actual BSDF materials for rendering the hemispheres\n"); |
484 |
|
|
printf("\nvoid BSDF BSDF_f\n6 0 \"%s%s\" upx upy upz bsdf2rad.cal\n0\n0\n", |
485 |
greg |
2.16 |
curdir, XMLfile); |
486 |
|
|
printf("\nvoid plastic black\n0\n0\n5 0 0 0 0 0\n"); |
487 |
greg |
2.24 |
printf("\nvoid mixfunc %s\n4 BSDF_f black latlong bsdf2rad.cal\n0\n0\n", |
488 |
|
|
sph_fmat); |
489 |
|
|
printf("\nvoid BSDF BSDF_b\n8 0 \"%s%s\" upx upy upz bsdf2rad.cal -ry 180\n0\n0\n", |
490 |
|
|
curdir, XMLfile); |
491 |
|
|
printf("\nvoid mixfunc %s\n4 BSDF_b black latlong bsdf2rad.cal\n0\n0\n", |
492 |
|
|
sph_bmat); |
493 |
greg |
2.16 |
} |
494 |
|
|
|
495 |
|
|
/* Put out overhead parallel light source */ |
496 |
|
|
static void |
497 |
|
|
put_source(void) |
498 |
|
|
{ |
499 |
|
|
printf("\n# Overhead parallel light source\n"); |
500 |
greg |
2.20 |
printf("\nvoid light bright\n0\n0\n3 2500 2500 2500\n"); |
501 |
greg |
2.16 |
printf("\nbright source light\n0\n0\n4 0 0 1 2\n"); |
502 |
|
|
printf("\n# Material used for labels\n"); |
503 |
|
|
printf("\nvoid trans vellum\n0\n0\n7 1 1 1 0 0 .5 0\n"); |
504 |
|
|
} |
505 |
|
|
|
506 |
|
|
/* Put out hemisphere(s) */ |
507 |
|
|
static void |
508 |
|
|
put_hemispheres(void) |
509 |
|
|
{ |
510 |
greg |
2.21 |
const int nsegs = 131; |
511 |
|
|
|
512 |
greg |
2.16 |
printf("\n# Hemisphere(s) for showing BSDF appearance (if XML file)\n"); |
513 |
|
|
if (front_comp) { |
514 |
greg |
2.21 |
printf( |
515 |
|
|
"\n!genrev %s Front \"R*sin(A*t)\" \"R*cos(A*t)\" %d -e \"R:%g;A:%f\" -s | xform -t %g 0 0\n", |
516 |
greg |
2.24 |
sph_fmat, nsegs, sph_rad, 0.495*PI, sph_xoffset); |
517 |
greg |
2.16 |
printf("\nvoid brighttext front_text\n3 helvet.fnt . FRONT\n0\n"); |
518 |
|
|
printf("12\n\t%f %f 0\n\t%f 0 0\n\t0 %f 0\n\t.01 1 -.1\n", |
519 |
greg |
2.20 |
-.22*sph_rad + sph_xoffset, -1.4*sph_rad, |
520 |
greg |
2.16 |
.35/5.*sph_rad, -1.6*.35/5.*sph_rad); |
521 |
|
|
printf("\nfront_text alias front_label_mat vellum\n"); |
522 |
|
|
printf("\nfront_label_mat polygon front_label\n0\n0\n12"); |
523 |
|
|
printf("\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n", |
524 |
greg |
2.20 |
-.25*sph_rad + sph_xoffset, -1.3*sph_rad, |
525 |
|
|
-.25*sph_rad + sph_xoffset, (-1.4-1.6*.35/5.-.1)*sph_rad, |
526 |
|
|
.25*sph_rad + sph_xoffset, (-1.4-1.6*.35/5.-.1)*sph_rad, |
527 |
|
|
.25*sph_rad + sph_xoffset, -1.3*sph_rad ); |
528 |
greg |
2.16 |
} |
529 |
|
|
if (back_comp) { |
530 |
greg |
2.21 |
printf( |
531 |
|
|
"\n!genrev %s Back \"R*cos(A*t)\" \"R*sin(A*t)\" %d -e \"R:%g;A:%f\" -s | xform -t %g 0 0\n", |
532 |
greg |
2.24 |
sph_bmat, nsegs, sph_rad, 0.495*PI, -sph_xoffset); |
533 |
greg |
2.16 |
printf("\nvoid brighttext back_text\n3 helvet.fnt . BACK\n0\n"); |
534 |
|
|
printf("12\n\t%f %f 0\n\t%f 0 0\n\t0 %f 0\n\t.01 1 -.1\n", |
535 |
greg |
2.20 |
-.22*sph_rad - sph_xoffset, -1.4*sph_rad, |
536 |
greg |
2.16 |
.35/4.*sph_rad, -1.6*.35/4.*sph_rad); |
537 |
|
|
printf("\nback_text alias back_label_mat vellum\n"); |
538 |
|
|
printf("\nback_label_mat polygon back_label\n0\n0\n12"); |
539 |
|
|
printf("\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n", |
540 |
greg |
2.20 |
-.25*sph_rad - sph_xoffset, -1.3*sph_rad, |
541 |
|
|
-.25*sph_rad - sph_xoffset, (-1.4-1.6*.35/4.-.1)*sph_rad, |
542 |
|
|
.25*sph_rad - sph_xoffset, (-1.4-1.6*.35/4.-.1)*sph_rad, |
543 |
|
|
.25*sph_rad - sph_xoffset, -1.3*sph_rad ); |
544 |
greg |
2.16 |
} |
545 |
|
|
} |
546 |
|
|
|
547 |
|
|
/* Put out falsecolor scale and name label */ |
548 |
|
|
static void |
549 |
|
|
put_scale(void) |
550 |
|
|
{ |
551 |
|
|
const double max_log10 = log10(overall_max); |
552 |
greg |
2.20 |
const double leg_width = 2.*.75*(fabs(sph_xoffset) - sph_rad); |
553 |
greg |
2.16 |
const double leg_height = 2.*sph_rad; |
554 |
|
|
const int text_lines = 6; |
555 |
greg |
2.17 |
const int text_digits = 8; |
556 |
greg |
2.16 |
char fmt[16]; |
557 |
|
|
int i; |
558 |
|
|
|
559 |
|
|
printf("\n# BSDF legend with falsecolor scale\n"); |
560 |
|
|
printf("\nvoid colorfunc lscale\n10 sca_red(Py) sca_grn(Py) sca_blu(Py)"); |
561 |
|
|
printf("\n\tbsdf2rad.cal -s %f -t 0 %f 0\n0\n0\n", leg_height, -.5*leg_height); |
562 |
greg |
2.17 |
sprintf(fmt, "%%.%df", text_digits-3); |
563 |
greg |
2.16 |
for (i = 0; i < text_lines; i++) { |
564 |
|
|
char vbuf[16]; |
565 |
|
|
sprintf(vbuf, fmt, pow(10., (i+.5)/text_lines*(max_log10-min_log10)+min_log10)); |
566 |
|
|
printf("\nlscale brighttext lscale\n"); |
567 |
|
|
printf("3 helvet.fnt . %s\n0\n12\n", vbuf); |
568 |
|
|
printf("\t%f %f 0\n", -.45*leg_width, ((i+.9)/text_lines-.5)*leg_height); |
569 |
greg |
2.17 |
printf("\t%f 0 0\n", .8*leg_width/strlen(vbuf)); |
570 |
greg |
2.16 |
printf("\t0 %f 0\n", -.9/text_lines*leg_height); |
571 |
|
|
printf("\t.01 1 -.1\n"); |
572 |
|
|
} |
573 |
|
|
printf("\nlscale alias legend_mat vellum\n"); |
574 |
|
|
printf("\nlegend_mat polygon legend\n0\n0\n12"); |
575 |
|
|
printf("\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n", |
576 |
|
|
-.5*leg_width, .5*leg_height, |
577 |
|
|
-.5*leg_width, -.5*leg_height, |
578 |
|
|
.5*leg_width, -.5*leg_height, |
579 |
|
|
.5*leg_width, .5*leg_height); |
580 |
|
|
printf("\nvoid brighttext BSDFtitle\n3 helvet.fnt . BSDF\n0\n12\n"); |
581 |
|
|
printf("\t%f %f 0\n", -.25*leg_width, .7*leg_height); |
582 |
|
|
printf("\t%f 0 0\n", .4/4.*leg_width); |
583 |
|
|
printf("\t0 %f 0\n", -.1*leg_height); |
584 |
|
|
printf("\t.01 1 -.1\n"); |
585 |
|
|
printf("\nBSDFtitle alias title_mat vellum\n"); |
586 |
|
|
printf("\ntitle_mat polygon title\n0\n0\n12"); |
587 |
|
|
printf("\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n", |
588 |
|
|
-.3*leg_width, .75*leg_height, |
589 |
|
|
-.3*leg_width, .55*leg_height, |
590 |
|
|
.3*leg_width, .55*leg_height, |
591 |
|
|
.3*leg_width, .75*leg_height); |
592 |
|
|
if (!bsdf_name[0]) |
593 |
|
|
return; |
594 |
|
|
printf("\nvoid brighttext BSDFname\n3 helvet.fnt . \"%s\"\n0\n12\n", bsdf_name); |
595 |
|
|
printf("\t%f %f 0\n", -.95*leg_width, -.6*leg_height); |
596 |
greg |
2.18 |
printf("\t%f 0 0\n", 1.8/strlen(bsdf_name)*leg_width); |
597 |
greg |
2.16 |
printf("\t0 %f 0\n", -.1*leg_height); |
598 |
|
|
printf("\t.01 1 -.1\n"); |
599 |
|
|
printf("\nBSDFname alias name_mat vellum\n"); |
600 |
|
|
printf("\nname_mat polygon name\n0\n0\n12"); |
601 |
|
|
printf("\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n\t%f %f 0\n", |
602 |
|
|
-leg_width, -.55*leg_height, |
603 |
|
|
-leg_width, -.75*leg_height, |
604 |
|
|
leg_width, -.75*leg_height, |
605 |
|
|
leg_width, -.55*leg_height); |
606 |
|
|
} |
607 |
|
|
|
608 |
|
|
/* Convert MGF to Radiance in output */ |
609 |
|
|
static void |
610 |
|
|
convert_mgf(const char *mgfdata) |
611 |
|
|
{ |
612 |
|
|
int len = strlen(mgfdata); |
613 |
|
|
char mgfn[128]; |
614 |
|
|
char radfn[128]; |
615 |
|
|
char cmdbuf[256]; |
616 |
|
|
float xmin, xmax, ymin, ymax, zmin, zmax; |
617 |
|
|
double max_dim; |
618 |
|
|
int fd; |
619 |
|
|
FILE *fp; |
620 |
|
|
|
621 |
|
|
if (!len) return; |
622 |
|
|
strcpy(mgfn, tfile_name("geom", ".mgf", 0)); |
623 |
|
|
fd = open(mgfn, O_WRONLY|O_CREAT, 0666); |
624 |
|
|
if (fd < 0 || write(fd, mgfdata, len) != len) { |
625 |
|
|
fprintf(stderr, "%s: cannot write file '%s'\n", |
626 |
|
|
progname, mgfn); |
627 |
|
|
return; |
628 |
|
|
} |
629 |
|
|
close(fd); |
630 |
|
|
strcpy(radfn, tfile_name("geom", ".rad", 0)); |
631 |
|
|
sprintf(cmdbuf, "mgf2rad %s > %s", mgfn, radfn); |
632 |
|
|
if (!run_cmd(cmdbuf)) |
633 |
|
|
return; |
634 |
|
|
sprintf(cmdbuf, "getbbox -w -h %s", radfn); |
635 |
|
|
if ((fp = popen(cmdbuf, "r")) == NULL || |
636 |
|
|
fscanf(fp, "%f %f %f %f %f %f", |
637 |
|
|
&xmin, &xmax, &ymin, &ymax, &zmin, &zmax) != 6 |
638 |
|
|
|| pclose(fp) < 0) { |
639 |
|
|
fprintf(stderr, "%s: error reading from command: %s\n", |
640 |
|
|
progname, cmdbuf); |
641 |
|
|
return; |
642 |
|
|
} |
643 |
|
|
max_dim = ymax - ymin; |
644 |
|
|
if (xmax - xmin > max_dim) |
645 |
|
|
max_dim = xmax - xmin; |
646 |
|
|
if (front_comp) { |
647 |
|
|
printf("\n# BSDF system geometry (front view)\n"); |
648 |
|
|
sprintf(cmdbuf, "xform -t %f %f %f -s %f -t %f %f 0 %s", |
649 |
|
|
-.5*(xmin+xmax), -.5*(ymin+ymax), -zmax, |
650 |
|
|
1.5*sph_rad/max_dim, |
651 |
greg |
2.20 |
sph_xoffset, -2.5*sph_rad, |
652 |
greg |
2.16 |
radfn); |
653 |
|
|
if (!run_cmd(cmdbuf)) |
654 |
|
|
return; |
655 |
|
|
} |
656 |
|
|
if (back_comp) { |
657 |
|
|
printf("\n# BSDF system geometry (back view)\n"); |
658 |
|
|
sprintf(cmdbuf, "xform -t %f %f %f -s %f -ry 180 -t %f %f 0 %s", |
659 |
|
|
-.5*(xmin+xmax), -.5*(ymin+ymax), -zmin, |
660 |
|
|
1.5*sph_rad/max_dim, |
661 |
greg |
2.20 |
-sph_xoffset, -2.5*sph_rad, |
662 |
greg |
2.16 |
radfn); |
663 |
|
|
if (!run_cmd(cmdbuf)) |
664 |
|
|
return; |
665 |
|
|
} |
666 |
|
|
} |
667 |
|
|
|
668 |
|
|
/* Check RBF input header line & get minimum BSDF value */ |
669 |
|
|
static int |
670 |
|
|
rbf_headline(char *s, void *p) |
671 |
|
|
{ |
672 |
|
|
char fmt[64]; |
673 |
|
|
|
674 |
|
|
if (formatval(fmt, s)) { |
675 |
|
|
if (strcmp(fmt, BSDFREP_FMT)) |
676 |
|
|
return(-1); |
677 |
|
|
return(0); |
678 |
|
|
} |
679 |
|
|
if (!strncmp(s, "IO_SIDES=", 9)) { |
680 |
|
|
sscanf(s+9, "%d %d", &input_orient, &output_orient); |
681 |
|
|
if (input_orient == output_orient) { |
682 |
|
|
if (input_orient > 0) |
683 |
|
|
front_comp |= SDsampR; |
684 |
|
|
else |
685 |
|
|
back_comp |= SDsampR; |
686 |
|
|
} else if (input_orient > 0) |
687 |
|
|
front_comp |= SDsampT; |
688 |
|
|
else |
689 |
|
|
back_comp |= SDsampT; |
690 |
|
|
return(0); |
691 |
|
|
} |
692 |
|
|
if (!strncmp(s, "BSDFMIN=", 8)) { |
693 |
|
|
sscanf(s+8, "%lf", &bsdf_min); |
694 |
|
|
if (bsdf_min < overall_min) |
695 |
|
|
overall_min = bsdf_min; |
696 |
|
|
return(0); |
697 |
|
|
} |
698 |
|
|
return(0); |
699 |
|
|
} |
700 |
greg |
2.1 |
|
701 |
greg |
2.16 |
/* Produce a Radiance model plotting the given BSDF representation */ |
702 |
greg |
2.1 |
int |
703 |
|
|
main(int argc, char *argv[]) |
704 |
|
|
{ |
705 |
greg |
2.4 |
int inpXML = -1; |
706 |
|
|
SDData myBSDF; |
707 |
greg |
2.16 |
int n; |
708 |
greg |
2.4 |
/* check arguments */ |
709 |
greg |
2.1 |
progname = argv[0]; |
710 |
greg |
2.16 |
if (argc > 1 && (n = strlen(argv[1])-4) > 0) { |
711 |
greg |
2.4 |
if (!strcasecmp(argv[1]+n, ".xml")) |
712 |
|
|
inpXML = 1; |
713 |
|
|
else if (!strcasecmp(argv[1]+n, ".sir")) |
714 |
|
|
inpXML = 0; |
715 |
|
|
} |
716 |
greg |
2.16 |
if (inpXML < 0 || inpXML & (argc > 2)) { |
717 |
|
|
fprintf(stderr, "Usage: %s bsdf.xml > output.rad\n", progname); |
718 |
|
|
fprintf(stderr, " Or: %s hemi1.sir hemi2.sir .. > output.rad\n", progname); |
719 |
greg |
2.1 |
return(1); |
720 |
|
|
} |
721 |
greg |
2.16 |
fputs("# ", stdout); /* copy our command */ |
722 |
|
|
printargs(argc, argv, stdout); |
723 |
|
|
/* evaluate BSDF */ |
724 |
greg |
2.4 |
if (inpXML) { |
725 |
|
|
SDclearBSDF(&myBSDF, argv[1]); |
726 |
|
|
if (SDreportError(SDloadFile(&myBSDF, argv[1]), stderr)) |
727 |
|
|
return(1); |
728 |
greg |
2.16 |
if (myBSDF.rf != NULL) front_comp |= SDsampR; |
729 |
|
|
if (myBSDF.tf != NULL) front_comp |= SDsampT; |
730 |
|
|
if (myBSDF.rb != NULL) back_comp |= SDsampR; |
731 |
|
|
if (myBSDF.tb != NULL) back_comp |= SDsampT; |
732 |
|
|
if (!front_comp & !back_comp) { |
733 |
|
|
fprintf(stderr, "%s: nothing to plot in '%s'\n", |
734 |
greg |
2.4 |
progname, argv[1]); |
735 |
|
|
return(1); |
736 |
|
|
} |
737 |
greg |
2.16 |
if (front_comp & SDsampR && myBSDF.rLambFront.cieY < overall_min*PI) |
738 |
|
|
overall_min = myBSDF.rLambFront.cieY/PI; |
739 |
|
|
if (back_comp & SDsampR && myBSDF.rLambBack.cieY < overall_min*PI) |
740 |
|
|
overall_min = myBSDF.rLambBack.cieY/PI; |
741 |
|
|
if ((front_comp|back_comp) & SDsampT && |
742 |
|
|
myBSDF.tLamb.cieY < overall_min*PI) |
743 |
|
|
overall_min = myBSDF.tLamb.cieY/PI; |
744 |
|
|
set_minlog(); |
745 |
|
|
if (!build_wBSDF(&myBSDF)) |
746 |
greg |
2.9 |
return(1); |
747 |
greg |
2.16 |
if (myBSDF.matn[0]) |
748 |
|
|
strcpy(bsdf_name, myBSDF.matn); |
749 |
greg |
2.1 |
else |
750 |
greg |
2.16 |
strcpy(bsdf_name, myBSDF.name); |
751 |
|
|
strcpy(bsdf_manuf, myBSDF.makr); |
752 |
|
|
put_matBSDF(argv[1]); |
753 |
|
|
} else { |
754 |
greg |
2.27 |
FILE *fp[4]; |
755 |
|
|
if (argc > 5) { |
756 |
greg |
2.28 |
fprintf(stderr, "%s: more than 4 hemispheres!\n", progname); |
757 |
greg |
2.27 |
return(1); |
758 |
|
|
} |
759 |
greg |
2.16 |
for (n = 1; n < argc; n++) { |
760 |
greg |
2.27 |
fp[n-1] = fopen(argv[n], "rb"); |
761 |
|
|
if (fp[n-1] == NULL) { |
762 |
greg |
2.16 |
fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n", |
763 |
|
|
progname, argv[n]); |
764 |
|
|
return(1); |
765 |
|
|
} |
766 |
greg |
2.27 |
if (getheader(fp[n-1], rbf_headline, NULL) < 0) { |
767 |
greg |
2.16 |
fprintf(stderr, "%s: bad BSDF interpolant '%s'\n", |
768 |
|
|
progname, argv[n]); |
769 |
|
|
return(1); |
770 |
greg |
2.2 |
} |
771 |
|
|
} |
772 |
greg |
2.16 |
set_minlog(); |
773 |
|
|
for (n = 1; n < argc; n++) { |
774 |
greg |
2.27 |
if (fseek(fp[n-1], 0L, SEEK_SET) < 0) { |
775 |
|
|
fprintf(stderr, "%s: cannot seek on '%s'\n", |
776 |
|
|
progname, argv[n]); |
777 |
|
|
return(1); |
778 |
|
|
} |
779 |
|
|
if (!load_bsdf_rep(fp[n-1])) |
780 |
greg |
2.16 |
return(1); |
781 |
greg |
2.27 |
fclose(fp[n-1]); |
782 |
greg |
2.16 |
if (!build_wRBF()) |
783 |
|
|
return(1); |
784 |
greg |
2.2 |
} |
785 |
greg |
2.16 |
put_matBSDF(NULL); |
786 |
greg |
2.1 |
} |
787 |
greg |
2.16 |
put_source(); /* before hemispheres & labels */ |
788 |
|
|
put_hemispheres(); |
789 |
|
|
put_scale(); |
790 |
|
|
if (inpXML && myBSDF.mgf) |
791 |
|
|
convert_mgf(myBSDF.mgf); |
792 |
greg |
2.28 |
if (!put_BSDFs()) /* most of the output happens here */ |
793 |
greg |
2.16 |
return(1); |
794 |
|
|
cleanup_tmp(); |
795 |
greg |
2.1 |
return(0); |
796 |
|
|
} |