1 |
greg |
2.1 |
#ifndef lint |
2 |
greg |
2.8 |
static const char RCSid[] = "$Id: bsdfquery.c,v 2.7 2016/08/18 00:52:48 greg Exp $"; |
3 |
greg |
2.1 |
#endif |
4 |
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/* |
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* Query values from the given BSDF (scattering interpolant or XML repres.) |
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* Input query is incident and exiting vectors directed away from surface. |
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* We normalize. Output is a BSDF value for the vector pair. |
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* It is wise to sort the input directions to keep identical ones together |
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* when using a scattering interpolant representation. |
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*/ |
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#define _USE_MATH_DEFINES |
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#include <stdio.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include "rtmath.h" |
17 |
greg |
2.7 |
#include "rtio.h" |
18 |
greg |
2.1 |
#include "bsdfrep.h" |
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char *progname; |
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22 |
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/* Read in a vector pair */ |
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static int |
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readIOdir(FVECT idir, FVECT odir, FILE *fp, int fmt) |
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{ |
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double dvec[6]; |
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float fvec[6]; |
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29 |
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switch (fmt) { |
30 |
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case 'a': |
31 |
greg |
2.5 |
if (fscanf(fp, FVFORMAT, &idir[0], &idir[1], &idir[2]) != 3 || |
32 |
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fscanf(fp, FVFORMAT, &odir[0], &odir[1], &odir[2]) != 3) |
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greg |
2.1 |
return(0); |
34 |
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break; |
35 |
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case 'd': |
36 |
greg |
2.7 |
if (getbinary(dvec, sizeof(double), 6, fp) != 6) |
37 |
greg |
2.1 |
return(0); |
38 |
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VCOPY(idir, dvec); |
39 |
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VCOPY(odir, dvec+3); |
40 |
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break; |
41 |
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case 'f': |
42 |
greg |
2.7 |
if (getbinary(fvec, sizeof(float), 6, fp) != 6) |
43 |
greg |
2.1 |
return(0); |
44 |
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VCOPY(idir, fvec); |
45 |
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VCOPY(odir, fvec+3); |
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break; |
47 |
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} |
48 |
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if ((normalize(idir) == 0) | (normalize(odir) == 0)) { |
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fprintf(stderr, "%s: zero input vector!\n", progname); |
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return(0); |
51 |
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} |
52 |
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return(1); |
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} |
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/* Get BSDF values for the input and output directions given on stdin */ |
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int |
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main(int argc, char *argv[]) |
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{ |
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greg |
2.6 |
int repXYZ = 0; |
60 |
greg |
2.1 |
int inpXML = -1; |
61 |
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int inpfmt = 'a'; |
62 |
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int outfmt = 'a'; |
63 |
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RBFNODE *rbf = NULL; |
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int32 prevInpDir = 0; |
65 |
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SDData myBSDF; |
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FVECT idir, odir; |
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int n; |
68 |
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/* check arguments */ |
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progname = argv[0]; |
70 |
greg |
2.6 |
while (argc > 2 && argv[1][0] == '-') { |
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switch (argv[1][1]) { |
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case 'c': /* color output */ |
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repXYZ = 1; |
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break; |
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case 'f': /* i/o format */ |
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if (!argv[1][2] || strchr("afd", argv[1][2]) == NULL) |
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goto userr; |
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inpfmt = outfmt = argv[1][2]; |
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if (argv[1][3] && strchr("afd", argv[1][3]) != NULL) |
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outfmt = argv[1][3]; |
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break; |
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default: |
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goto userr; |
84 |
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} |
85 |
greg |
2.1 |
++argv; --argc; |
86 |
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} |
87 |
greg |
2.2 |
if (argc > 1 && (n = strlen(argv[1])-4) > 0) { |
88 |
greg |
2.1 |
if (!strcasecmp(argv[1]+n, ".xml")) |
89 |
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inpXML = 1; |
90 |
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else if (!strcasecmp(argv[1]+n, ".sir")) |
91 |
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inpXML = 0; |
92 |
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} |
93 |
greg |
2.6 |
if ((argc != 2) | (inpXML < 0)) |
94 |
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goto userr; |
95 |
greg |
2.1 |
/* load BSDF representation */ |
96 |
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if (inpXML) { |
97 |
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SDclearBSDF(&myBSDF, argv[1]); |
98 |
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if (SDreportError(SDloadFile(&myBSDF, argv[1]), stderr)) |
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return(1); |
100 |
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} else { |
101 |
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FILE *fp = fopen(argv[1], "rb"); |
102 |
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if (fp == NULL) { |
103 |
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fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n", |
104 |
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progname, argv[1]); |
105 |
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return(1); |
106 |
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} |
107 |
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if (!load_bsdf_rep(fp)) |
108 |
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return(1); |
109 |
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fclose(fp); |
110 |
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} |
111 |
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/* query BSDF values */ |
112 |
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while (readIOdir(idir, odir, stdin, inpfmt)) { |
113 |
greg |
2.6 |
SDValue sval; |
114 |
greg |
2.1 |
if (inpXML) { |
115 |
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if (SDreportError(SDevalBSDF(&sval, odir, |
116 |
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idir, &myBSDF), stderr)) |
117 |
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return(1); |
118 |
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} else { |
119 |
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int32 inpDir = encodedir(idir); |
120 |
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if (inpDir != prevInpDir) { |
121 |
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if (idir[2] > 0 ^ input_orient > 0) { |
122 |
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fprintf(stderr, "%s: input hemisphere error\n", |
123 |
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progname); |
124 |
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return(1); |
125 |
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} |
126 |
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if (rbf != NULL) free(rbf); |
127 |
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rbf = advect_rbf(idir, 15000); |
128 |
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prevInpDir = inpDir; |
129 |
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} |
130 |
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if (odir[2] > 0 ^ output_orient > 0) { |
131 |
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fprintf(stderr, "%s: output hemisphere error\n", |
132 |
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progname); |
133 |
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return(1); |
134 |
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} |
135 |
greg |
2.6 |
if (SDreportError(eval_rbfcol(&sval, rbf, odir), stderr)) |
136 |
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return(1); |
137 |
greg |
2.1 |
} |
138 |
greg |
2.6 |
|
139 |
greg |
2.1 |
switch (outfmt) { /* write to stdout */ |
140 |
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case 'a': |
141 |
greg |
2.6 |
if (repXYZ) { |
142 |
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double cieX = sval.spec.cx/sval.spec.cy*sval.cieY; |
143 |
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double cieZ = (1. - sval.spec.cx - sval.spec.cy) / |
144 |
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sval.spec.cy * sval.cieY; |
145 |
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printf("%.6e %.6e %.6e\n", cieX, sval.cieY, cieZ); |
146 |
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} else |
147 |
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printf("%.6e\n", sval.cieY); |
148 |
greg |
2.1 |
break; |
149 |
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case 'd': |
150 |
greg |
2.6 |
if (repXYZ) { |
151 |
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double cieXYZ[3]; |
152 |
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cieXYZ[0] = sval.spec.cx/sval.spec.cy*sval.cieY; |
153 |
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cieXYZ[1] = sval.cieY; |
154 |
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cieXYZ[2] = (1. - sval.spec.cx - sval.spec.cy) / |
155 |
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sval.spec.cy * sval.cieY; |
156 |
greg |
2.7 |
putbinary(cieXYZ, sizeof(double), 3, stdout); |
157 |
greg |
2.6 |
} else |
158 |
greg |
2.7 |
putbinary(&sval.cieY, sizeof(double), 1, stdout); |
159 |
greg |
2.1 |
break; |
160 |
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case 'f': |
161 |
greg |
2.6 |
if (repXYZ) { |
162 |
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float cieXYZ[3]; |
163 |
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cieXYZ[0] = sval.spec.cx/sval.spec.cy*sval.cieY; |
164 |
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cieXYZ[1] = sval.cieY; |
165 |
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cieXYZ[2] = (1. - sval.spec.cx - sval.spec.cy) / |
166 |
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sval.spec.cy * sval.cieY; |
167 |
greg |
2.7 |
putbinary(cieXYZ, sizeof(float), 3, stdout); |
168 |
greg |
2.6 |
} else { |
169 |
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float cieY = sval.cieY; |
170 |
greg |
2.7 |
putbinary(&cieY, sizeof(float), 1, stdout); |
171 |
greg |
2.6 |
} |
172 |
greg |
2.1 |
break; |
173 |
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} |
174 |
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} |
175 |
greg |
2.6 |
/* if (rbf != NULL) free(rbf); */ |
176 |
greg |
2.1 |
return(0); |
177 |
greg |
2.6 |
userr: |
178 |
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fprintf(stderr, "Usage: %s [-c][-fio] bsdf.{sir|xml}\n", progname); |
179 |
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return(1); |
180 |
greg |
2.1 |
} |