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#ifndef lint |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Load measured BSDF data in PAB-Opto format. |
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* |
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* G. Ward |
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*/ |
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|
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#include <stdio.h> |
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#include <string.h> |
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#include <ctype.h> |
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#include "platform.h" |
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#include "bsdfrep.h" |
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/* global argv[0] */ |
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char *progname; |
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|
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/* Load a set of measurements corresponding to a particular incident angle */ |
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static int |
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load_pabopto_meas(const char *fname) |
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{ |
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FILE *fp = fopen(fname, "r"); |
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int inp_is_DSF = -1; |
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double new_theta, new_phi, theta_out, phi_out, val; |
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char buf[2048]; |
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int n, c; |
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|
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if (fp == NULL) { |
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fputs(fname, stderr); |
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fputs(": cannot open\n", stderr); |
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return(0); |
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} |
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#ifdef DEBUG |
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fprintf(stderr, "Loading measurement file '%s'...\n", fname); |
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#endif |
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/* read header information */ |
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while ((c = getc(fp)) == '#' || c == EOF) { |
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if (fgets(buf, sizeof(buf), fp) == NULL) { |
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fputs(fname, stderr); |
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fputs(": unexpected EOF\n", stderr); |
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fclose(fp); |
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return(0); |
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} |
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if (!strcmp(buf, "format: theta phi DSF\n")) { |
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inp_is_DSF = 1; |
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continue; |
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} |
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if (!strcmp(buf, "format: theta phi BSDF\n")) { |
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inp_is_DSF = 0; |
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continue; |
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} |
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if (sscanf(buf, "intheta %lf", &new_theta) == 1) |
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continue; |
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if (sscanf(buf, "inphi %lf", &new_phi) == 1) |
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continue; |
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if (sscanf(buf, "incident_angle %lf %lf", |
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&new_theta, &new_phi) == 2) |
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continue; |
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} |
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ungetc(c, fp); |
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if (inp_is_DSF < 0) { |
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fputs(fname, stderr); |
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fputs(": unknown format\n", stderr); |
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fclose(fp); |
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return(0); |
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} |
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/* prepare input grid */ |
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new_bsdf_data(new_theta, new_phi); |
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/* read actual data */ |
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while (fscanf(fp, "%lf %lf %lf\n", &theta_out, &phi_out, &val) == 3) |
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add_bsdf_data(theta_out, phi_out, val, inp_is_DSF); |
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n = 0; |
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while ((c = getc(fp)) != EOF) |
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n += !isspace(c); |
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if (n) |
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fprintf(stderr, |
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"%s: warning: %d unexpected characters past EOD\n", |
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fname, n); |
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fclose(fp); |
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return(1); |
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} |
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|
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/* Read in PAB-Opto BSDF files and output RBF interpolant */ |
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int |
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main(int argc, char *argv[]) |
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{ |
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extern int nprocs; |
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int i; |
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/* start header */ |
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SET_FILE_BINARY(stdout); |
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newheader("RADIANCE", stdout); |
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printargs(argc, argv, stdout); |
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fputnow(stdout); |
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progname = argv[0]; /* get options */ |
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while (argc > 2 && argv[1][0] == '-') { |
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switch (argv[1][1]) { |
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case 'n': |
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nprocs = atoi(argv[2]); |
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break; |
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default: |
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goto userr; |
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} |
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argv += 2; argc -= 2; |
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} |
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if (argc < 3) |
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goto userr; |
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for (i = 1; i < argc; i++) { /* compile measurements */ |
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if (!load_pabopto_meas(argv[i])) |
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return(1); |
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make_rbfrep(); |
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} |
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build_mesh(); /* create interpolation */ |
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save_bsdf_rep(stdout); /* write it out */ |
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return(0); |
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userr: |
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fprintf(stderr, "Usage: %s [-n nproc] meas1.dat meas2.dat .. > bsdf.sir\n", |
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progname); |
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return(1); |
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} |
