| 1 |
greg |
2.1 |
#ifndef lint |
| 2 |
|
|
static const char RCSid[] = "$Id$"; |
| 3 |
|
|
#endif |
| 4 |
|
|
/* |
| 5 |
|
|
* Load measured BSDF data in PAB-Opto format. |
| 6 |
|
|
* |
| 7 |
|
|
* G. Ward |
| 8 |
|
|
*/ |
| 9 |
|
|
|
| 10 |
|
|
#include <stdio.h> |
| 11 |
|
|
#include <string.h> |
| 12 |
|
|
#include <ctype.h> |
| 13 |
|
|
#include "platform.h" |
| 14 |
|
|
#include "bsdfrep.h" |
| 15 |
|
|
/* global argv[0] */ |
| 16 |
|
|
char *progname; |
| 17 |
|
|
|
| 18 |
|
|
/* Load a set of measurements corresponding to a particular incident angle */ |
| 19 |
|
|
static int |
| 20 |
|
|
load_pabopto_meas(const char *fname) |
| 21 |
|
|
{ |
| 22 |
|
|
FILE *fp = fopen(fname, "r"); |
| 23 |
|
|
int inp_is_DSF = -1; |
| 24 |
|
|
double new_theta, new_phi, theta_out, phi_out, val; |
| 25 |
|
|
char buf[2048]; |
| 26 |
|
|
int n, c; |
| 27 |
|
|
|
| 28 |
|
|
if (fp == NULL) { |
| 29 |
|
|
fputs(fname, stderr); |
| 30 |
|
|
fputs(": cannot open\n", stderr); |
| 31 |
|
|
return(0); |
| 32 |
|
|
} |
| 33 |
|
|
#ifdef DEBUG |
| 34 |
|
|
fprintf(stderr, "Loading measurement file '%s'...\n", fname); |
| 35 |
|
|
#endif |
| 36 |
|
|
/* read header information */ |
| 37 |
|
|
while ((c = getc(fp)) == '#' || c == EOF) { |
| 38 |
|
|
if (fgets(buf, sizeof(buf), fp) == NULL) { |
| 39 |
|
|
fputs(fname, stderr); |
| 40 |
|
|
fputs(": unexpected EOF\n", stderr); |
| 41 |
|
|
fclose(fp); |
| 42 |
|
|
return(0); |
| 43 |
|
|
} |
| 44 |
|
|
if (!strcmp(buf, "format: theta phi DSF\n")) { |
| 45 |
|
|
inp_is_DSF = 1; |
| 46 |
|
|
continue; |
| 47 |
|
|
} |
| 48 |
|
|
if (!strcmp(buf, "format: theta phi BSDF\n")) { |
| 49 |
|
|
inp_is_DSF = 0; |
| 50 |
|
|
continue; |
| 51 |
|
|
} |
| 52 |
|
|
if (sscanf(buf, "intheta %lf", &new_theta) == 1) |
| 53 |
|
|
continue; |
| 54 |
|
|
if (sscanf(buf, "inphi %lf", &new_phi) == 1) |
| 55 |
|
|
continue; |
| 56 |
|
|
if (sscanf(buf, "incident_angle %lf %lf", |
| 57 |
|
|
&new_theta, &new_phi) == 2) |
| 58 |
|
|
continue; |
| 59 |
|
|
} |
| 60 |
|
|
ungetc(c, fp); |
| 61 |
|
|
if (inp_is_DSF < 0) { |
| 62 |
|
|
fputs(fname, stderr); |
| 63 |
|
|
fputs(": unknown format\n", stderr); |
| 64 |
|
|
fclose(fp); |
| 65 |
|
|
return(0); |
| 66 |
|
|
} |
| 67 |
|
|
/* prepare input grid */ |
| 68 |
|
|
new_bsdf_data(new_theta, new_phi); |
| 69 |
|
|
/* read actual data */ |
| 70 |
|
|
while (fscanf(fp, "%lf %lf %lf\n", &theta_out, &phi_out, &val) == 3) |
| 71 |
|
|
add_bsdf_data(theta_out, phi_out, val, inp_is_DSF); |
| 72 |
|
|
n = 0; |
| 73 |
|
|
while ((c = getc(fp)) != EOF) |
| 74 |
|
|
n += !isspace(c); |
| 75 |
|
|
if (n) |
| 76 |
|
|
fprintf(stderr, |
| 77 |
|
|
"%s: warning: %d unexpected characters past EOD\n", |
| 78 |
|
|
fname, n); |
| 79 |
|
|
fclose(fp); |
| 80 |
|
|
return(1); |
| 81 |
|
|
} |
| 82 |
|
|
|
| 83 |
|
|
/* Read in PAB-Opto BSDF files and output RBF interpolant */ |
| 84 |
|
|
int |
| 85 |
|
|
main(int argc, char *argv[]) |
| 86 |
|
|
{ |
| 87 |
|
|
extern int nprocs; |
| 88 |
|
|
int i; |
| 89 |
|
|
/* start header */ |
| 90 |
|
|
SET_FILE_BINARY(stdout); |
| 91 |
|
|
newheader("RADIANCE", stdout); |
| 92 |
|
|
printargs(argc, argv, stdout); |
| 93 |
|
|
fputnow(stdout); |
| 94 |
|
|
progname = argv[0]; /* get options */ |
| 95 |
|
|
while (argc > 2 && argv[1][0] == '-') { |
| 96 |
|
|
switch (argv[1][1]) { |
| 97 |
|
|
case 'n': |
| 98 |
|
|
nprocs = atoi(argv[2]); |
| 99 |
|
|
break; |
| 100 |
|
|
default: |
| 101 |
|
|
goto userr; |
| 102 |
|
|
} |
| 103 |
|
|
argv += 2; argc -= 2; |
| 104 |
|
|
} |
| 105 |
|
|
if (argc < 3) |
| 106 |
|
|
goto userr; |
| 107 |
|
|
for (i = 1; i < argc; i++) { /* compile measurements */ |
| 108 |
|
|
if (!load_pabopto_meas(argv[i])) |
| 109 |
|
|
return(1); |
| 110 |
|
|
make_rbfrep(); |
| 111 |
|
|
} |
| 112 |
|
|
build_mesh(); /* create interpolation */ |
| 113 |
|
|
save_bsdf_rep(stdout); /* write it out */ |
| 114 |
|
|
return(0); |
| 115 |
|
|
userr: |
| 116 |
|
|
fprintf(stderr, "Usage: %s [-n nproc] meas1.dat meas2.dat .. > bsdf.sir\n", |
| 117 |
|
|
progname); |
| 118 |
|
|
return(1); |
| 119 |
|
|
} |
