| 1 |
greg |
2.1 |
#ifndef lint |
| 2 |
greg |
2.6 |
static const char RCSid[] = "$Id: bsdfquery.c,v 2.5 2016/01/20 19:43:34 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. |
| 7 |
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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" |
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#include "bsdfrep.h" |
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char *progname; |
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| 21 |
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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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switch (fmt) { |
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case 'a': |
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greg |
2.5 |
if (fscanf(fp, FVFORMAT, &idir[0], &idir[1], &idir[2]) != 3 || |
| 31 |
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fscanf(fp, FVFORMAT, &odir[0], &odir[1], &odir[2]) != 3) |
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greg |
2.1 |
return(0); |
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break; |
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case 'd': |
| 35 |
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if (fread(dvec, sizeof(double), 6, fp) != 6) |
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return(0); |
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VCOPY(idir, dvec); |
| 38 |
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VCOPY(odir, dvec+3); |
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break; |
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case 'f': |
| 41 |
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if (fread(fvec, sizeof(float), 6, fp) != 6) |
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return(0); |
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VCOPY(idir, fvec); |
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VCOPY(odir, fvec+3); |
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break; |
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} |
| 47 |
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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); |
| 50 |
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} |
| 51 |
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return(1); |
| 52 |
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} |
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| 54 |
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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; |
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greg |
2.1 |
int inpXML = -1; |
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int inpfmt = 'a'; |
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int outfmt = 'a'; |
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RBFNODE *rbf = NULL; |
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int32 prevInpDir = 0; |
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SDData myBSDF; |
| 65 |
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FVECT idir, odir; |
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int n; |
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/* check arguments */ |
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progname = argv[0]; |
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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; |
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} |
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greg |
2.1 |
++argv; --argc; |
| 85 |
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} |
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greg |
2.2 |
if (argc > 1 && (n = strlen(argv[1])-4) > 0) { |
| 87 |
greg |
2.1 |
if (!strcasecmp(argv[1]+n, ".xml")) |
| 88 |
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inpXML = 1; |
| 89 |
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else if (!strcasecmp(argv[1]+n, ".sir")) |
| 90 |
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inpXML = 0; |
| 91 |
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} |
| 92 |
greg |
2.6 |
if ((argc != 2) | (inpXML < 0)) |
| 93 |
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goto userr; |
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greg |
2.1 |
/* load BSDF representation */ |
| 95 |
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if (inpXML) { |
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SDclearBSDF(&myBSDF, argv[1]); |
| 97 |
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if (SDreportError(SDloadFile(&myBSDF, argv[1]), stderr)) |
| 98 |
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return(1); |
| 99 |
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} else { |
| 100 |
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FILE *fp = fopen(argv[1], "rb"); |
| 101 |
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if (fp == NULL) { |
| 102 |
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fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n", |
| 103 |
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progname, argv[1]); |
| 104 |
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return(1); |
| 105 |
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} |
| 106 |
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if (!load_bsdf_rep(fp)) |
| 107 |
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return(1); |
| 108 |
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fclose(fp); |
| 109 |
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} |
| 110 |
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/* query BSDF values */ |
| 111 |
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while (readIOdir(idir, odir, stdin, inpfmt)) { |
| 112 |
greg |
2.6 |
SDValue sval; |
| 113 |
greg |
2.1 |
if (inpXML) { |
| 114 |
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if (SDreportError(SDevalBSDF(&sval, odir, |
| 115 |
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idir, &myBSDF), stderr)) |
| 116 |
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return(1); |
| 117 |
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} else { |
| 118 |
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int32 inpDir = encodedir(idir); |
| 119 |
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if (inpDir != prevInpDir) { |
| 120 |
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if (idir[2] > 0 ^ input_orient > 0) { |
| 121 |
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fprintf(stderr, "%s: input hemisphere error\n", |
| 122 |
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progname); |
| 123 |
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return(1); |
| 124 |
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} |
| 125 |
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if (rbf != NULL) free(rbf); |
| 126 |
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rbf = advect_rbf(idir, 15000); |
| 127 |
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prevInpDir = inpDir; |
| 128 |
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} |
| 129 |
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if (odir[2] > 0 ^ output_orient > 0) { |
| 130 |
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fprintf(stderr, "%s: output hemisphere error\n", |
| 131 |
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progname); |
| 132 |
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return(1); |
| 133 |
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} |
| 134 |
greg |
2.6 |
if (SDreportError(eval_rbfcol(&sval, rbf, odir), stderr)) |
| 135 |
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return(1); |
| 136 |
greg |
2.1 |
} |
| 137 |
greg |
2.6 |
if (repXYZ) /* ensure we have CIE (x,y) */ |
| 138 |
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c_ccvt(&sval.spec, C_CSXY); |
| 139 |
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| 140 |
greg |
2.1 |
switch (outfmt) { /* write to stdout */ |
| 141 |
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case 'a': |
| 142 |
greg |
2.6 |
if (repXYZ) { |
| 143 |
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double cieX = sval.spec.cx/sval.spec.cy*sval.cieY; |
| 144 |
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double cieZ = (1. - sval.spec.cx - sval.spec.cy) / |
| 145 |
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sval.spec.cy * sval.cieY; |
| 146 |
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printf("%.6e %.6e %.6e\n", cieX, sval.cieY, cieZ); |
| 147 |
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} else |
| 148 |
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printf("%.6e\n", sval.cieY); |
| 149 |
greg |
2.1 |
break; |
| 150 |
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case 'd': |
| 151 |
greg |
2.6 |
if (repXYZ) { |
| 152 |
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double cieXYZ[3]; |
| 153 |
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cieXYZ[0] = sval.spec.cx/sval.spec.cy*sval.cieY; |
| 154 |
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cieXYZ[1] = sval.cieY; |
| 155 |
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cieXYZ[2] = (1. - sval.spec.cx - sval.spec.cy) / |
| 156 |
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sval.spec.cy * sval.cieY; |
| 157 |
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fwrite(cieXYZ, sizeof(double), 3, stdout); |
| 158 |
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} else |
| 159 |
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fwrite(&sval.cieY, sizeof(double), 1, stdout); |
| 160 |
greg |
2.1 |
break; |
| 161 |
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case 'f': |
| 162 |
greg |
2.6 |
if (repXYZ) { |
| 163 |
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float cieXYZ[3]; |
| 164 |
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cieXYZ[0] = sval.spec.cx/sval.spec.cy*sval.cieY; |
| 165 |
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cieXYZ[1] = sval.cieY; |
| 166 |
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cieXYZ[2] = (1. - sval.spec.cx - sval.spec.cy) / |
| 167 |
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sval.spec.cy * sval.cieY; |
| 168 |
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fwrite(cieXYZ, sizeof(float), 3, stdout); |
| 169 |
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} else { |
| 170 |
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float cieY = sval.cieY; |
| 171 |
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fwrite(&cieY, sizeof(float), 1, stdout); |
| 172 |
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} |
| 173 |
greg |
2.1 |
break; |
| 174 |
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} |
| 175 |
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} |
| 176 |
greg |
2.6 |
/* if (rbf != NULL) free(rbf); */ |
| 177 |
greg |
2.1 |
return(0); |
| 178 |
greg |
2.6 |
userr: |
| 179 |
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fprintf(stderr, "Usage: %s [-c][-fio] bsdf.{sir|xml}\n", progname); |
| 180 |
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return(1); |
| 181 |
greg |
2.1 |
} |
