src/cv/pabopto2bsdf.c

#ifndef lint
static const char RCSid[] = "$Id: pabopto2bsdf.c,v 2.34 2019/04/23 17:18:18 greg Exp $";
#endif
/*
 * Load measured BSDF data in PAB-Opto format.
 * Assumes that surface-normal (Z-axis) faces into room unless -t option given.
 *
 *      G. Ward
 */

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

typedef struct {
        const char      *fname;         /* input file path */
        double          theta, phi;     /* input angles (degrees) */
        double          up_phi;         /* azimuth for "up" direction */
        int             igp[2];         /* input grid position */
        int             isDSF;          /* data is DSF (rather than BSDF)? */
        int             nspec;          /* number of spectral samples */
        long            dstart;         /* data start offset in file */
} PGINPUT;

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

int             rev_orient = 0; /* shall we reverse surface orientation? */

/* Compare incident angles */
static int
cmp_indir(const void *p1, const void *p2)
{
        const PGINPUT   *inp1 = (const PGINPUT *)p1;
        const PGINPUT   *inp2 = (const PGINPUT *)p2;
        int             ydif = inp1->igp[1] - inp2->igp[1];
        
        if (ydif)
                return(ydif);

        return(inp1->igp[0] - inp2->igp[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");
        FVECT   dv;
        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].nspec = 0;
        inpfile[i].up_phi = 0;
        inpfile[i].theta = inpfile[i].phi = -10001.;
                                /* read header information */
        while ((c = getc(fp)) == '#' || c == EOF) {
                char    typ[64];
                if (fgets(buf, sizeof(buf), fp) == NULL) {
                        fputs(fname, stderr);
                        fputs(": unexpected EOF\n", stderr);
                        fclose(fp);
                        return(0);
                }
                if (sscanf(buf, "sample_name \"%[^\"]\"", bsdf_name) == 1)
                        continue;
                if (sscanf(buf, "colorimetry: %s", typ) == 1) {
                        if (!strcasecmp(typ, "CIE-XYZ"))
                                inpfile[i].nspec = 3;
                        else if (!strcasecmp(typ, "CIE-Y"))
                                inpfile[i].nspec = 1;
                        continue;
                }
                if (sscanf(buf, "format: theta phi %s", typ) == 1) {
                        if (!strcasecmp(typ, "DSF"))
                                inpfile[i].isDSF = 1;
                        else if (!strcasecmp(typ, "BSDF") ||
                                        !strcasecmp(typ, "BRDF") ||
                                        !strcasecmp(typ, "BTDF"))
                                inpfile[i].isDSF = 0;
                        continue;
                }
                if (sscanf(buf, "upphi %lf", &inpfile[i].up_phi) == 1)
                        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);
        }
        if (rev_orient) {       /* reverse Z-axis to face outside */
                inpfile[i].theta = 180. - inpfile[i].theta;
                inpfile[i].phi = 360. - inpfile[i].phi;
        }
                                /* convert to Y-up orientation */
        inpfile[i].phi += 90.-inpfile[i].up_phi;
                                /* convert angle to grid position */
        dv[2] = sin(M_PI/180.*inpfile[i].theta);
        dv[0] = cos(M_PI/180.*inpfile[i].phi)*dv[2];
        dv[1] = sin(M_PI/180.*inpfile[i].phi)*dv[2];
        dv[2] = sqrt(1. - dv[2]*dv[2]);
        if (inpfile[i].theta <= FTINY)
                inpfile[i].igp[0] = inpfile[i].igp[1] = grid_res/2 - 1;
        else
                pos_from_vec(inpfile[i].igp, dv);
        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[3];
        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);
        }
                                        /* prepare input grid */
        if (!i || cmp_indir(&inpfile[i-1], &inpfile[i])) {
                if (i)                  /* process previous incidence */
                        make_rbfrep();
#ifdef DEBUG
                fprintf(stderr, "New incident (theta,phi)=(%.1f,%.1f)\n",
                                        inpfile[i].theta, inpfile[i].phi);
#endif
                if (inpfile[i].nspec)
                        set_spectral_samples(inpfile[i].nspec);
                new_bsdf_data(inpfile[i].theta, inpfile[i].phi);
        }
#ifdef DEBUG
        fprintf(stderr, "Loading measurements from '%s'...\n", inpfile[i].fname);
#endif
                                        /* read scattering data */
        while (fscanf(fp, "%lf %lf %lf", &theta_out, &phi_out, val) == 3) {
                for (n = 1; n < inpfile[i].nspec; n++)
                        if (fscanf(fp, "%lf", val+n) != 1) {
                                fprintf(stderr, "%s: warning: unexpected EOF\n",
                                                inpfile[i].fname);
                                fclose(fp);
                                return(1);
                        }
                if (rev_orient) {       /* reverse Z-axis to face outside */
                        theta_out = 180. - theta_out;
                        phi_out = 360. - phi_out;
                }
                add_bsdf_data(theta_out, phi_out+90.-inpfile[i].up_phi,
                                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);
}

#ifndef TEST_MAIN

#define SYM_ILL         '?'             /* illegal symmetry value */
#define SYM_ISO         'I'             /* isotropic */
#define SYM_QUAD        'Q'             /* quadrilateral symmetry */
#define SYM_BILAT       'B'             /* bilateral symmetry */
#define SYM_ANISO       'A'             /* anisotropic */

static const char       quadrant_rep[16][16] = {
                                "in-plane","0-90","90-180","0-180",
                                "180-270","0-90+180-270","90-270",
                                "0-270","270-360","270-90",
                                "90-180+270-360","270-180","180-360",
                                "180-90","90-360","0-360"
                        };
static const char       quadrant_sym[16] = {
                                SYM_ISO, SYM_QUAD, SYM_QUAD, SYM_BILAT,
                                SYM_QUAD, SYM_ILL, SYM_BILAT, SYM_ILL,
                                SYM_QUAD, SYM_BILAT, SYM_ILL, SYM_ILL,
                                SYM_BILAT, SYM_ILL, SYM_ILL, SYM_ANISO
                        };

/* Read in PAB-Opto BSDF files and output RBF interpolant */
int
main(int argc, char *argv[])
{
        extern int      nprocs;
        const char      *symmetry = "U";
        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 't':
                        rev_orient = !rev_orient;
                        break;
                case 'n':
                        nprocs = atoi(argv[2]);
                        argv++; argc--;
                        break;
                case 's':
                        symmetry = argv[2];
                        argv++; argc--;
                        break;
                default:
                        goto userr;
                }
                argv++; argc--;
        }
                                                /* 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_indir);
                                                /* compile measurements */
        for (i = 0; i < ninpfiles; i++)
                if (!add_pabopto_inp(i))
                        return(1);
        make_rbfrep();                          /* process last data set */
                                                /* check input symmetry */
        switch (toupper(symmetry[0])) {
        case 'U':                               /* unspecified symmetry */
                if (quadrant_sym[inp_coverage] != SYM_ILL)
                        break;                  /* anything legal goes */
                fprintf(stderr, "%s: unsupported phi coverage (%s)\n",
                                progname, quadrant_rep[inp_coverage]);
                return(1);
        case SYM_ISO:                           /* legal symmetry types */
        case SYM_QUAD:
        case SYM_BILAT:
        case SYM_ANISO:
                if (quadrant_sym[inp_coverage] == toupper(symmetry[0]))
                        break;                  /* matches spec */
                fprintf(stderr,
                "%s: phi coverage (%s) does not match requested '%s' symmetry\n",
                                progname, quadrant_rep[inp_coverage], symmetry);
                return(1);
        default:
                fprintf(stderr,
  "%s: -s option must be Isotropic, Quadrilateral, Bilateral, or Anisotropic\n",
                                progname);
                return(1);
        }
#ifdef DEBUG
        fprintf(stderr, "Input phi coverage (%s) has '%c' symmetry\n",
                                quadrant_rep[inp_coverage],
                                quadrant_sym[inp_coverage]);
#endif
        build_mesh();                           /* create interpolation */
        save_bsdf_rep(stdout);                  /* write it out */
        return(0);
userr:
        fprintf(stderr, "Usage: %s [-t][-n nproc][-s symmetry] meas1.dat meas2.dat .. > bsdf.sir\n",
                                        progname);
        return(1);
}

#else           /* TEST_MAIN */

/* Test main produces a Radiance model from the given input file */
int
main(int argc, char *argv[])
{
        PGINPUT pginp;
        char    buf[128];
        FILE    *pfp;
        double  bsdf, min_log;
        FVECT   dir;
        int     i, j, n;

        progname = argv[0];
        if (argc != 2) {
                fprintf(stderr, "Usage: %s input.dat > output.rad\n", progname);
                return(1);
        }
        ninpfiles = 1;
        inpfile = &pginp;
        if (!init_pabopto_inp(0, argv[1]) || !add_pabopto_inp(0))
                return(1);
                                                /* reduce data set */
        if (make_rbfrep() == NULL) {
                fprintf(stderr, "%s: nothing to plot!\n", progname);
                exit(1);
        }
#ifdef DEBUG
        fprintf(stderr, "Minimum BSDF = %.4f\n", bsdf_min);
#endif
        min_log = log(bsdf_min*.5 + 1e-5);
#if 1                                           /* produce spheres at meas. */
        puts("void plastic yellow\n0\n0\n5 .6 .4 .01 .04 .08\n");
        n = 0;
        for (i = 0; i < grid_res; i++)
            for (j = 0; j < grid_res; j++)
                if (dsf_grid[i][j].sum.n > 0) {
                        ovec_from_pos(dir, i, j);
                        bsdf = dsf_grid[i][j].sum.v /
                           ((double)dsf_grid[i][j].sum.n*output_orient*dir[2]);
                        if (bsdf <= bsdf_min*.6)
                                continue;
                        bsdf = log(bsdf + 1e-5) - min_log;
                        ovec_from_pos(dir, i, j);
                        printf("yellow sphere s%04d\n0\n0\n", ++n);
                        printf("4 %.6g %.6g %.6g %.6g\n\n",
                                        dir[0]*bsdf, dir[1]*bsdf, dir[2]*bsdf,
                                        .007*bsdf);
                }
#endif
#if 1                                           /* spheres at RBF peaks */
        puts("void plastic red\n0\n0\n5 .8 .01 .01 .04 .08\n");
        for (n = 0; n < dsf_list->nrbf; n++) {
                RBFVAL  *rbf = &dsf_list->rbfa[n];
                ovec_from_pos(dir, rbf->gx, rbf->gy);
                bsdf = eval_rbfrep(dsf_list, dir);
                bsdf = log(bsdf + 1e-5) - min_log;
                printf("red sphere p%04d\n0\n0\n", ++n);
                printf("4 %.6g %.6g %.6g %.6g\n\n",
                                dir[0]*bsdf, dir[1]*bsdf, dir[2]*bsdf,
                                .011*bsdf);
        }
#endif
#if 1                                           /* output continuous surface */
        puts("void trans tgreen\n0\n0\n7 .7 1 .7 .04 .04 .9 1\n");
        fflush(stdout);
        sprintf(buf, "gensurf tgreen bsdf - - - %d %d", grid_res-1, grid_res-1);
        pfp = popen(buf, "w");
        if (pfp == NULL) {
                fprintf(stderr, "%s: cannot open '| %s'\n", progname, buf);
                return(1);
        }
        for (i = 0; i < grid_res; i++)
            for (j = 0; j < grid_res; j++) {
                ovec_from_pos(dir, i, j);
                bsdf = eval_rbfrep(dsf_list, dir);
                bsdf = log(bsdf + 1e-5) - min_log;
                fprintf(pfp, "%.8e %.8e %.8e\n",
                                dir[0]*bsdf, dir[1]*bsdf, dir[2]*bsdf);
            }
        if (pclose(pfp) != 0)
                return(1);
#endif
        return(0);
}

#endif          /* TEST_MAIN */
Revision:	2.35
Committed:	Tue Apr 23 23:48:33 2019 UTC (6 years, 6 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.34:	+49 -51 lines
Log Message:	Simplified and improved last change
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.35	static const char RCSid[] = "$Id: pabopto2bsdf.c,v 2.34 2019/04/23 17:18:18 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Load measured BSDF data in PAB-Opto format.
6	greg	2.29	* Assumes that surface-normal (Z-axis) faces into room unless -t option given.
7	greg	2.1	*
8			* G. Ward
9			*/
10
11	greg	2.20	#define _USE_MATH_DEFINES
12	greg	2.1	#include <stdio.h>
13	greg	2.2	#include <stdlib.h>
14	greg	2.1	#include <string.h>
15			#include <ctype.h>
16	greg	2.6	#include <math.h>
17	greg	2.1	#include "platform.h"
18			#include "bsdfrep.h"
19	greg	2.15	#include "resolu.h"
20	greg	2.1	/* global argv[0] */
21			char *progname;
22
23	greg	2.2	typedef struct {
24			const char fname; / input file path */
25	greg	2.27	double theta, phi; /* input angles (degrees) */
26			double up_phi; /* azimuth for "up" direction */
27	greg	2.20	int igp[2]; /* input grid position */
28	greg	2.2	int isDSF; /* data is DSF (rather than BSDF)? */
29	greg	2.28	int nspec; /* number of spectral samples */
30	greg	2.2	long dstart; /* data start offset in file */
31			} PGINPUT;
32
33			PGINPUT inpfile; / input files sorted by incidence */
34			int ninpfiles; /* number of input files */
35
36	greg	2.29	int rev_orient = 0; /* shall we reverse surface orientation? */
37
38	greg	2.2	/* Compare incident angles */
39			static int
40	greg	2.20	cmp_indir(const void p1, const void p2)
41	greg	2.2	{
42			const PGINPUT inp1 = (const PGINPUT )p1;
43			const PGINPUT inp2 = (const PGINPUT )p2;
44	greg	2.20	int ydif = inp1->igp[1] - inp2->igp[1];
45	greg	2.2
46	greg	2.20	if (ydif)
47			return(ydif);
48
49			return(inp1->igp[0] - inp2->igp[0]);
50	greg	2.2	}
51
52			/* Prepare a PAB-Opto input file by reading its header */
53	greg	2.1	static int
54	greg	2.2	init_pabopto_inp(const int i, const char *fname)
55	greg	2.1	{
56			FILE *fp = fopen(fname, "r");
57	greg	2.20	FVECT dv;
58	greg	2.1	char buf[2048];
59	greg	2.2	int c;
60	greg	2.1
61			if (fp == NULL) {
62			fputs(fname, stderr);
63			fputs(": cannot open\n", stderr);
64			return(0);
65			}
66	greg	2.2	inpfile[i].fname = fname;
67			inpfile[i].isDSF = -1;
68	greg	2.28	inpfile[i].nspec = 0;
69	greg	2.27	inpfile[i].up_phi = 0;
70	greg	2.2	inpfile[i].theta = inpfile[i].phi = -10001.;
71	greg	2.1	/* read header information */
72			while ((c = getc(fp)) == '#' \|\| c == EOF) {
73	greg	2.28	char typ[64];
74	greg	2.1	if (fgets(buf, sizeof(buf), fp) == NULL) {
75			fputs(fname, stderr);
76			fputs(": unexpected EOF\n", stderr);
77			fclose(fp);
78			return(0);
79			}
80	greg	2.10	if (sscanf(buf, "sample_name \"%[^\"]\"", bsdf_name) == 1)
81			continue;
82	greg	2.28	if (sscanf(buf, "colorimetry: %s", typ) == 1) {
83			if (!strcasecmp(typ, "CIE-XYZ"))
84			inpfile[i].nspec = 3;
85			else if (!strcasecmp(typ, "CIE-Y"))
86			inpfile[i].nspec = 1;
87			continue;
88			}
89	greg	2.5	if (sscanf(buf, "format: theta phi %s", typ) == 1) {
90	greg	2.28	if (!strcasecmp(typ, "DSF"))
91	greg	2.5	inpfile[i].isDSF = 1;
92	greg	2.28	else if (!strcasecmp(typ, "BSDF") \|\|
93	greg	2.23	!strcasecmp(typ, "BRDF") \|\|
94	greg	2.28	!strcasecmp(typ, "BTDF"))
95	greg	2.5	inpfile[i].isDSF = 0;
96	greg	2.28	continue;
97	greg	2.1	}
98	greg	2.27	if (sscanf(buf, "upphi %lf", &inpfile[i].up_phi) == 1)
99			continue;
100	greg	2.2	if (sscanf(buf, "intheta %lf", &inpfile[i].theta) == 1)
101	greg	2.1	continue;
102	greg	2.2	if (sscanf(buf, "inphi %lf", &inpfile[i].phi) == 1)
103	greg	2.1	continue;
104			if (sscanf(buf, "incident_angle %lf %lf",
105	greg	2.2	&inpfile[i].theta, &inpfile[i].phi) == 2)
106	greg	2.1	continue;
107			}
108	greg	2.2	inpfile[i].dstart = ftell(fp) - 1;
109			fclose(fp);
110			if (inpfile[i].isDSF < 0) {
111	greg	2.1	fputs(fname, stderr);
112			fputs(": unknown format\n", stderr);
113			return(0);
114			}
115	greg	2.2	if ((inpfile[i].theta < -10000.) \| (inpfile[i].phi < -10000.)) {
116			fputs(fname, stderr);
117			fputs(": unknown incident angle\n", stderr);
118			return(0);
119			}
120	greg	2.29	if (rev_orient) { /* reverse Z-axis to face outside */
121			inpfile[i].theta = 180. - inpfile[i].theta;
122			inpfile[i].phi = 360. - inpfile[i].phi;
123			}
124	greg	2.27	/* convert to Y-up orientation */
125			inpfile[i].phi += 90.-inpfile[i].up_phi;
126	greg	2.20	/* convert angle to grid position */
127			dv[2] = sin(M_PI/180.*inpfile[i].theta);
128			dv[0] = cos(M_PI/180.inpfile[i].phi)dv[2];
129			dv[1] = sin(M_PI/180.inpfile[i].phi)dv[2];
130			dv[2] = sqrt(1. - dv[2]*dv[2]);
131	greg	2.30	if (inpfile[i].theta <= FTINY)
132			inpfile[i].igp[0] = inpfile[i].igp[1] = grid_res/2 - 1;
133			else
134			pos_from_vec(inpfile[i].igp, dv);
135	greg	2.2	return(1);
136			}
137
138			/* Load a set of measurements corresponding to a particular incident angle */
139			static int
140			add_pabopto_inp(const int i)
141			{
142	greg	2.19	FILE *fp = fopen(inpfile[i].fname, "r");
143	greg	2.28	double theta_out, phi_out, val[3];
144	greg	2.19	int n, c;
145	greg	2.2
146			if (fp == NULL \|\| fseek(fp, inpfile[i].dstart, 0) == EOF) {
147			fputs(inpfile[i].fname, stderr);
148			fputs(": cannot open\n", stderr);
149			return(0);
150			}
151	greg	2.1	/* prepare input grid */
152	greg	2.20	if (!i \|\| cmp_indir(&inpfile[i-1], &inpfile[i])) {
153			if (i) /* process previous incidence */
154	greg	2.2	make_rbfrep();
155			#ifdef DEBUG
156	greg	2.22	fprintf(stderr, "New incident (theta,phi)=(%.1f,%.1f)\n",
157	greg	2.2	inpfile[i].theta, inpfile[i].phi);
158			#endif
159	greg	2.28	if (inpfile[i].nspec)
160			set_spectral_samples(inpfile[i].nspec);
161	greg	2.2	new_bsdf_data(inpfile[i].theta, inpfile[i].phi);
162			}
163	greg	2.3	#ifdef DEBUG
164			fprintf(stderr, "Loading measurements from '%s'...\n", inpfile[i].fname);
165			#endif
166	greg	2.2	/* read scattering data */
167	greg	2.28	while (fscanf(fp, "%lf %lf %lf", &theta_out, &phi_out, val) == 3) {
168			for (n = 1; n < inpfile[i].nspec; n++)
169			if (fscanf(fp, "%lf", val+n) != 1) {
170			fprintf(stderr, "%s: warning: unexpected EOF\n",
171			inpfile[i].fname);
172			fclose(fp);
173			return(1);
174			}
175	greg	2.29	if (rev_orient) { /* reverse Z-axis to face outside */
176			theta_out = 180. - theta_out;
177			phi_out = 360. - phi_out;
178			}
179	greg	2.27	add_bsdf_data(theta_out, phi_out+90.-inpfile[i].up_phi,
180			val, inpfile[i].isDSF);
181	greg	2.28	}
182	greg	2.1	n = 0;
183			while ((c = getc(fp)) != EOF)
184			n += !isspace(c);
185			if (n)
186			fprintf(stderr,
187			"%s: warning: %d unexpected characters past EOD\n",
188	greg	2.2	inpfile[i].fname, n);
189	greg	2.1	fclose(fp);
190			return(1);
191			}
192
193	greg	2.8	#ifndef TEST_MAIN
194	greg	2.35
195			#define SYM_ILL '?' /* illegal symmetry value */
196			#define SYM_ISO 'I' /* isotropic */
197			#define SYM_QUAD 'Q' /* quadrilateral symmetry */
198			#define SYM_BILAT 'B' /* bilateral symmetry */
199			#define SYM_ANISO 'A' /* anisotropic */
200
201			static const char quadrant_rep[16][16] = {
202			"in-plane","0-90","90-180","0-180",
203			"180-270","0-90+180-270","90-270",
204			"0-270","270-360","270-90",
205			"90-180+270-360","270-180","180-360",
206			"180-90","90-360","0-360"
207			};
208			static const char quadrant_sym[16] = {
209			SYM_ISO, SYM_QUAD, SYM_QUAD, SYM_BILAT,
210			SYM_QUAD, SYM_ILL, SYM_BILAT, SYM_ILL,
211			SYM_QUAD, SYM_BILAT, SYM_ILL, SYM_ILL,
212			SYM_BILAT, SYM_ILL, SYM_ILL, SYM_ANISO
213			};
214
215	greg	2.1	/* Read in PAB-Opto BSDF files and output RBF interpolant */
216			int
217			main(int argc, char *argv[])
218			{
219	greg	2.35	extern int nprocs;
220			const char *symmetry = "U";
221			int i;
222	greg	2.1	/* start header */
223			SET_FILE_BINARY(stdout);
224			newheader("RADIANCE", stdout);
225			printargs(argc, argv, stdout);
226			fputnow(stdout);
227			progname = argv[0]; /* get options */
228			while (argc > 2 && argv[1][0] == '-') {
229			switch (argv[1][1]) {
230	greg	2.29	case 't':
231			rev_orient = !rev_orient;
232			break;
233	greg	2.1	case 'n':
234			nprocs = atoi(argv[2]);
235	greg	2.29	argv++; argc--;
236	greg	2.1	break;
237	greg	2.33	case 's':
238			symmetry = argv[2];
239			argv++; argc--;
240			break;
241	greg	2.1	default:
242			goto userr;
243			}
244	greg	2.29	argv++; argc--;
245	greg	2.1	}
246	greg	2.2	/* initialize & sort inputs */
247			ninpfiles = argc - 1;
248			if (ninpfiles < 2)
249	greg	2.1	goto userr;
250	greg	2.2	inpfile = (PGINPUT )malloc(sizeof(PGINPUT)ninpfiles);
251			if (inpfile == NULL)
252			return(1);
253			for (i = 0; i < ninpfiles; i++)
254			if (!init_pabopto_inp(i, argv[i+1]))
255	greg	2.1	return(1);
256	greg	2.25	qsort(inpfile, ninpfiles, sizeof(PGINPUT), cmp_indir);
257	greg	2.2	/* compile measurements */
258			for (i = 0; i < ninpfiles; i++)
259			if (!add_pabopto_inp(i))
260			return(1);
261			make_rbfrep(); /* process last data set */
262	greg	2.33	/* check input symmetry */
263			switch (toupper(symmetry[0])) {
264	greg	2.35	case 'U': /* unspecified symmetry */
265			if (quadrant_sym[inp_coverage] != SYM_ILL)
266			break; /* anything legal goes */
267			fprintf(stderr, "%s: unsupported phi coverage (%s)\n",
268			progname, quadrant_rep[inp_coverage]);
269			return(1);
270			case SYM_ISO: /* legal symmetry types */
271			case SYM_QUAD:
272			case SYM_BILAT:
273			case SYM_ANISO:
274			if (quadrant_sym[inp_coverage] == toupper(symmetry[0]))
275			break; /* matches spec */
276			fprintf(stderr,
277			"%s: phi coverage (%s) does not match requested '%s' symmetry\n",
278			progname, quadrant_rep[inp_coverage], symmetry);
279			return(1);
280	greg	2.33	default:
281			fprintf(stderr,
282			"%s: -s option must be Isotropic, Quadrilateral, Bilateral, or Anisotropic\n",
283			progname);
284			return(1);
285			}
286			#ifdef DEBUG
287	greg	2.35	fprintf(stderr, "Input phi coverage (%s) has '%c' symmetry\n",
288			quadrant_rep[inp_coverage],
289			quadrant_sym[inp_coverage]);
290	greg	2.33	#endif
291	greg	2.1	build_mesh(); /* create interpolation */
292			save_bsdf_rep(stdout); /* write it out */
293			return(0);
294			userr:
295	greg	2.33	fprintf(stderr, "Usage: %s [-t][-n nproc][-s symmetry] meas1.dat meas2.dat .. > bsdf.sir\n",
296	greg	2.1	progname);
297			return(1);
298			}
299	greg	2.35
300			#else /* TEST_MAIN */
301
302	greg	2.6	/* Test main produces a Radiance model from the given input file */
303			int
304			main(int argc, char *argv[])
305			{
306			PGINPUT pginp;
307			char buf[128];
308			FILE *pfp;
309			double bsdf, min_log;
310			FVECT dir;
311			int i, j, n;
312
313	greg	2.21	progname = argv[0];
314	greg	2.6	if (argc != 2) {
315	greg	2.21	fprintf(stderr, "Usage: %s input.dat > output.rad\n", progname);
316	greg	2.6	return(1);
317			}
318			ninpfiles = 1;
319			inpfile = &pginp;
320			if (!init_pabopto_inp(0, argv[1]) \|\| !add_pabopto_inp(0))
321			return(1);
322			/* reduce data set */
323	greg	2.21	if (make_rbfrep() == NULL) {
324			fprintf(stderr, "%s: nothing to plot!\n", progname);
325			exit(1);
326			}
327	greg	2.9	#ifdef DEBUG
328			fprintf(stderr, "Minimum BSDF = %.4f\n", bsdf_min);
329			#endif
330	greg	2.13	min_log = log(bsdf_min*.5 + 1e-5);
331	greg	2.11	#if 1 /* produce spheres at meas. */
332	greg	2.6	puts("void plastic yellow\n0\n0\n5 .6 .4 .01 .04 .08\n");
333			n = 0;
334	greg	2.28	for (i = 0; i < grid_res; i++)
335			for (j = 0; j < grid_res; j++)
336	greg	2.16	if (dsf_grid[i][j].sum.n > 0) {
337	greg	2.6	ovec_from_pos(dir, i, j);
338	greg	2.16	bsdf = dsf_grid[i][j].sum.v /
339	greg	2.24	((double)dsf_grid[i][j].sum.noutput_orientdir[2]);
340	greg	2.6	if (bsdf <= bsdf_min*.6)
341			continue;
342	greg	2.14	bsdf = log(bsdf + 1e-5) - min_log;
343	greg	2.7	ovec_from_pos(dir, i, j);
344			printf("yellow sphere s%04d\n0\n0\n", ++n);
345			printf("4 %.6g %.6g %.6g %.6g\n\n",
346	greg	2.6	dir[0]bsdf, dir[1]bsdf, dir[2]*bsdf,
347	greg	2.7	.007*bsdf);
348	greg	2.6	}
349	greg	2.11	#endif
350			#if 1 /* spheres at RBF peaks */
351			puts("void plastic red\n0\n0\n5 .8 .01 .01 .04 .08\n");
352			for (n = 0; n < dsf_list->nrbf; n++) {
353			RBFVAL *rbf = &dsf_list->rbfa[n];
354			ovec_from_pos(dir, rbf->gx, rbf->gy);
355	greg	2.26	bsdf = eval_rbfrep(dsf_list, dir);
356	greg	2.14	bsdf = log(bsdf + 1e-5) - min_log;
357	greg	2.11	printf("red sphere p%04d\n0\n0\n", ++n);
358			printf("4 %.6g %.6g %.6g %.6g\n\n",
359			dir[0]bsdf, dir[1]bsdf, dir[2]*bsdf,
360			.011*bsdf);
361			}
362			#endif
363			#if 1 /* output continuous surface */
364	greg	2.6	puts("void trans tgreen\n0\n0\n7 .7 1 .7 .04 .04 .9 1\n");
365			fflush(stdout);
366	greg	2.28	sprintf(buf, "gensurf tgreen bsdf - - - %d %d", grid_res-1, grid_res-1);
367	greg	2.6	pfp = popen(buf, "w");
368			if (pfp == NULL) {
369	greg	2.21	fprintf(stderr, "%s: cannot open '\| %s'\n", progname, buf);
370	greg	2.6	return(1);
371			}
372	greg	2.28	for (i = 0; i < grid_res; i++)
373			for (j = 0; j < grid_res; j++) {
374	greg	2.6	ovec_from_pos(dir, i, j);
375	greg	2.26	bsdf = eval_rbfrep(dsf_list, dir);
376	greg	2.14	bsdf = log(bsdf + 1e-5) - min_log;
377	greg	2.6	fprintf(pfp, "%.8e %.8e %.8e\n",
378			dir[0]bsdf, dir[1]bsdf, dir[2]*bsdf);
379			}
380	greg	2.11	if (pclose(pfp) != 0)
381			return(1);
382			#endif
383			return(0);
384	greg	2.6	}
385	greg	2.35
386			#endif /* TEST_MAIN */