src/cv/pabopto2bsdf.c

#ifndef lint
static const char RCSid[] = "$Id: pabopto2bsdf.c,v 2.1 2012/10/19 04:14:29 greg Exp $";
#endif
/*
 * Load measured BSDF data in PAB-Opto format.
 *
 *      G. Ward
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "platform.h"
#include "bsdfrep.h"
                                /* global argv[0] */
char                    *progname;

typedef struct {
        const char      *fname;         /* input file path */
        double          theta, phi;     /* incident angles (in degrees) */
        int             isDSF;          /* data is DSF (rather than BSDF)? */
        long            dstart;         /* data start offset in file */
} PGINPUT;

PGINPUT         *inpfile;       /* input files sorted by incidence */
int             ninpfiles;      /* number of input files */

/* Compare incident angles */
static int
cmp_inang(const void *p1, const void *p2)
{
        const PGINPUT   *inp1 = (const PGINPUT *)p1;
        const PGINPUT   *inp2 = (const PGINPUT *)p2;
        
        if (inp1->theta > inp2->theta+FTINY)
                return(1);
        if (inp1->theta < inp2->theta-FTINY)
                return(-1);
        if (inp1->phi > inp2->phi+FTINY)
                return(1);
        if (inp1->phi < inp2->phi-FTINY)
                return(-1);
        return(0);
}

/* Prepare a PAB-Opto input file by reading its header */
static int
init_pabopto_inp(const int i, const char *fname)
{
        FILE    *fp = fopen(fname, "r");
        char    buf[2048];
        int     c;
        
        if (fp == NULL) {
                fputs(fname, stderr);
                fputs(": cannot open\n", stderr);
                return(0);
        }
        inpfile[i].fname = fname;
        inpfile[i].isDSF = -1;
        inpfile[i].theta = inpfile[i].phi = -10001.;
                                /* read header information */
        while ((c = getc(fp)) == '#' || c == EOF) {
                if (fgets(buf, sizeof(buf), fp) == NULL) {
                        fputs(fname, stderr);
                        fputs(": unexpected EOF\n", stderr);
                        fclose(fp);
                        return(0);
                }
                if (!strcmp(buf, "format: theta phi DSF\n")) {
                        inpfile[i].isDSF = 1;
                        continue;
                }
                if (!strcmp(buf, "format: theta phi BSDF\n")) {
                        inpfile[i].isDSF = 0;
                        continue;
                }
                if (sscanf(buf, "intheta %lf", &inpfile[i].theta) == 1)
                        continue;
                if (sscanf(buf, "inphi %lf", &inpfile[i].phi) == 1)
                        continue;
                if (sscanf(buf, "incident_angle %lf %lf",
                                &inpfile[i].theta, &inpfile[i].phi) == 2)
                        continue;
        }
        inpfile[i].dstart = ftell(fp) - 1;
        fclose(fp);
        if (inpfile[i].isDSF < 0) {
                fputs(fname, stderr);
                fputs(": unknown format\n", stderr);
                return(0);
        }
        if ((inpfile[i].theta < -10000.) | (inpfile[i].phi < -10000.)) {
                fputs(fname, stderr);
                fputs(": unknown incident angle\n", stderr);
                return(0);
        }
        return(1);
}

/* Load a set of measurements corresponding to a particular incident angle */
static int
add_pabopto_inp(const int i)
{
        FILE    *fp = fopen(inpfile[i].fname, "r");
        double  theta_out, phi_out, val;
        int     n, c;
        
        if (fp == NULL || fseek(fp, inpfile[i].dstart, 0) == EOF) {
                fputs(inpfile[i].fname, stderr);
                fputs(": cannot open\n", stderr);
                return(0);
        }
#ifdef DEBUG
        fprintf(stderr, "Loading measurements from '%s'...\n", inpfile[i].fname);
#endif
                                        /* prepare input grid */
        if (!i || cmp_inang(&inpfile[i-1], &inpfile[i])) {
                if (i)                  /* need to process previous incidence */
                        make_rbfrep();
#ifdef DEBUG
                fprintf(stderr, "New incident (theta,phi)=(%f,%f)\n",
                                        inpfile[i].theta, inpfile[i].phi);
#endif
                new_bsdf_data(inpfile[i].theta, inpfile[i].phi);
        }
                                        /* read scattering data */
        while (fscanf(fp, "%lf %lf %lf\n", &theta_out, &phi_out, &val) == 3)
                add_bsdf_data(theta_out, phi_out, val, inpfile[i].isDSF);
        n = 0;
        while ((c = getc(fp)) != EOF)
                n += !isspace(c);
        if (n) 
                fprintf(stderr,
                        "%s: warning: %d unexpected characters past EOD\n",
                                inpfile[i].fname, n);
        fclose(fp);
        return(1);
}

/* Read in PAB-Opto BSDF files and output RBF interpolant */
int
main(int argc, char *argv[])
{
        extern int      nprocs;
        int             i;
                                                /* start header */
        SET_FILE_BINARY(stdout);
        newheader("RADIANCE", stdout);
        printargs(argc, argv, stdout);
        fputnow(stdout);
        progname = argv[0];                     /* get options */
        while (argc > 2 && argv[1][0] == '-') {
                switch (argv[1][1]) {
                case 'n':
                        nprocs = atoi(argv[2]);
                        break;
                default:
                        goto userr;
                }
                argv += 2; argc -= 2;
        }
                                                /* initialize & sort inputs */
        ninpfiles = argc - 1;
        if (ninpfiles < 2)
                goto userr;
        inpfile = (PGINPUT *)malloc(sizeof(PGINPUT)*ninpfiles);
        if (inpfile == NULL)
                return(1);
        for (i = 0; i < ninpfiles; i++)
                if (!init_pabopto_inp(i, argv[i+1]))
                        return(1);
        qsort(inpfile, ninpfiles, sizeof(PGINPUT), &cmp_inang);
                                                /* compile measurements */
        for (i = 0; i < ninpfiles; i++)
                if (!add_pabopto_inp(i))
                        return(1);
        make_rbfrep();                          /* process last data set */
        build_mesh();                           /* create interpolation */
        save_bsdf_rep(stdout);                  /* write it out */
        return(0);
userr:
        fprintf(stderr, "Usage: %s [-n nproc] meas1.dat meas2.dat .. > bsdf.sir\n",
                                        progname);
        return(1);
}
Revision:	2.2
Committed:	Sat Jun 29 22:35:15 2013 UTC (12 years, 3 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.1:	+94 -26 lines
Log Message:	Added handling of multiple input files with identical incident angles
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.2	static const char RCSid[] = "$Id: pabopto2bsdf.c,v 2.1 2012/10/19 04:14:29 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Load measured BSDF data in PAB-Opto format.
6			*
7			* G. Ward
8			*/
9
10			#include <stdio.h>
11	greg	2.2	#include <stdlib.h>
12	greg	2.1	#include <string.h>
13			#include <ctype.h>
14			#include "platform.h"
15			#include "bsdfrep.h"
16			/* global argv[0] */
17			char *progname;
18
19	greg	2.2	typedef struct {
20			const char fname; / input file path */
21			double theta, phi; /* incident angles (in degrees) */
22			int isDSF; /* data is DSF (rather than BSDF)? */
23			long dstart; /* data start offset in file */
24			} PGINPUT;
25
26			PGINPUT inpfile; / input files sorted by incidence */
27			int ninpfiles; /* number of input files */
28
29			/* Compare incident angles */
30			static int
31			cmp_inang(const void p1, const void p2)
32			{
33			const PGINPUT inp1 = (const PGINPUT )p1;
34			const PGINPUT inp2 = (const PGINPUT )p2;
35
36			if (inp1->theta > inp2->theta+FTINY)
37			return(1);
38			if (inp1->theta < inp2->theta-FTINY)
39			return(-1);
40			if (inp1->phi > inp2->phi+FTINY)
41			return(1);
42			if (inp1->phi < inp2->phi-FTINY)
43			return(-1);
44			return(0);
45			}
46
47			/* Prepare a PAB-Opto input file by reading its header */
48	greg	2.1	static int
49	greg	2.2	init_pabopto_inp(const int i, const char *fname)
50	greg	2.1	{
51			FILE *fp = fopen(fname, "r");
52			char buf[2048];
53	greg	2.2	int c;
54	greg	2.1
55			if (fp == NULL) {
56			fputs(fname, stderr);
57			fputs(": cannot open\n", stderr);
58			return(0);
59			}
60	greg	2.2	inpfile[i].fname = fname;
61			inpfile[i].isDSF = -1;
62			inpfile[i].theta = inpfile[i].phi = -10001.;
63	greg	2.1	/* read header information */
64			while ((c = getc(fp)) == '#' \|\| c == EOF) {
65			if (fgets(buf, sizeof(buf), fp) == NULL) {
66			fputs(fname, stderr);
67			fputs(": unexpected EOF\n", stderr);
68			fclose(fp);
69			return(0);
70			}
71			if (!strcmp(buf, "format: theta phi DSF\n")) {
72	greg	2.2	inpfile[i].isDSF = 1;
73	greg	2.1	continue;
74			}
75			if (!strcmp(buf, "format: theta phi BSDF\n")) {
76	greg	2.2	inpfile[i].isDSF = 0;
77	greg	2.1	continue;
78			}
79	greg	2.2	if (sscanf(buf, "intheta %lf", &inpfile[i].theta) == 1)
80	greg	2.1	continue;
81	greg	2.2	if (sscanf(buf, "inphi %lf", &inpfile[i].phi) == 1)
82	greg	2.1	continue;
83			if (sscanf(buf, "incident_angle %lf %lf",
84	greg	2.2	&inpfile[i].theta, &inpfile[i].phi) == 2)
85	greg	2.1	continue;
86			}
87	greg	2.2	inpfile[i].dstart = ftell(fp) - 1;
88			fclose(fp);
89			if (inpfile[i].isDSF < 0) {
90	greg	2.1	fputs(fname, stderr);
91			fputs(": unknown format\n", stderr);
92			return(0);
93			}
94	greg	2.2	if ((inpfile[i].theta < -10000.) \| (inpfile[i].phi < -10000.)) {
95			fputs(fname, stderr);
96			fputs(": unknown incident angle\n", stderr);
97			return(0);
98			}
99			return(1);
100			}
101
102			/* Load a set of measurements corresponding to a particular incident angle */
103			static int
104			add_pabopto_inp(const int i)
105			{
106			FILE *fp = fopen(inpfile[i].fname, "r");
107			double theta_out, phi_out, val;
108			int n, c;
109
110			if (fp == NULL \|\| fseek(fp, inpfile[i].dstart, 0) == EOF) {
111			fputs(inpfile[i].fname, stderr);
112			fputs(": cannot open\n", stderr);
113			return(0);
114			}
115			#ifdef DEBUG
116			fprintf(stderr, "Loading measurements from '%s'...\n", inpfile[i].fname);
117			#endif
118	greg	2.1	/* prepare input grid */
119	greg	2.2	if (!i \|\| cmp_inang(&inpfile[i-1], &inpfile[i])) {
120			if (i) /* need to process previous incidence */
121			make_rbfrep();
122			#ifdef DEBUG
123			fprintf(stderr, "New incident (theta,phi)=(%f,%f)\n",
124			inpfile[i].theta, inpfile[i].phi);
125			#endif
126			new_bsdf_data(inpfile[i].theta, inpfile[i].phi);
127			}
128			/* read scattering data */
129	greg	2.1	while (fscanf(fp, "%lf %lf %lf\n", &theta_out, &phi_out, &val) == 3)
130	greg	2.2	add_bsdf_data(theta_out, phi_out, val, inpfile[i].isDSF);
131	greg	2.1	n = 0;
132			while ((c = getc(fp)) != EOF)
133			n += !isspace(c);
134			if (n)
135			fprintf(stderr,
136			"%s: warning: %d unexpected characters past EOD\n",
137	greg	2.2	inpfile[i].fname, n);
138	greg	2.1	fclose(fp);
139			return(1);
140			}
141
142			/* Read in PAB-Opto BSDF files and output RBF interpolant */
143			int
144			main(int argc, char *argv[])
145			{
146			extern int nprocs;
147			int i;
148			/* start header */
149			SET_FILE_BINARY(stdout);
150			newheader("RADIANCE", stdout);
151			printargs(argc, argv, stdout);
152			fputnow(stdout);
153			progname = argv[0]; /* get options */
154			while (argc > 2 && argv[1][0] == '-') {
155			switch (argv[1][1]) {
156			case 'n':
157			nprocs = atoi(argv[2]);
158			break;
159			default:
160			goto userr;
161			}
162			argv += 2; argc -= 2;
163			}
164	greg	2.2	/* initialize & sort inputs */
165			ninpfiles = argc - 1;
166			if (ninpfiles < 2)
167	greg	2.1	goto userr;
168	greg	2.2	inpfile = (PGINPUT )malloc(sizeof(PGINPUT)ninpfiles);
169			if (inpfile == NULL)
170			return(1);
171			for (i = 0; i < ninpfiles; i++)
172			if (!init_pabopto_inp(i, argv[i+1]))
173	greg	2.1	return(1);
174	greg	2.2	qsort(inpfile, ninpfiles, sizeof(PGINPUT), &cmp_inang);
175			/* compile measurements */
176			for (i = 0; i < ninpfiles; i++)
177			if (!add_pabopto_inp(i))
178			return(1);
179			make_rbfrep(); /* process last data set */
180	greg	2.1	build_mesh(); /* create interpolation */
181			save_bsdf_rep(stdout); /* write it out */
182			return(0);
183			userr:
184			fprintf(stderr, "Usage: %s [-n nproc] meas1.dat meas2.dat .. > bsdf.sir\n",
185			progname);
186			return(1);
187			}