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root/Development/ray/src/cv/pabopto2bsdf.c

Comparing ray/src/cv/pabopto2bsdf.c (file contents):
Revision 2.2 by greg, Sat Jun 29 22:35:15 2013 UTC vs.
Revision 2.22 by greg, Fri Mar 21 23:11:44 2014 UTC

#	Line 7 | Line 7 | static const char RCSid[] = "$Id$";
7		*      G. Ward
8		*/
9
10	+	#define _USE_MATH_DEFINES
11		#include <stdio.h>
12		#include <stdlib.h>
13		#include <string.h>
14		#include <ctype.h>
15	+	#include <math.h>
16		#include "platform.h"
17		#include "bsdfrep.h"
18	+	#include "resolu.h"
19		/* global argv[0] */
20		char                    *progname;
21
22		typedef struct {
23		const char      *fname;         /* input file path */
24	<	double          theta, phi;     /* incident angles (in degrees) */
24	>	double          theta, phi;     /* input angles */
25	>	int             igp[2];         /* input grid position */
26		int             isDSF;          /* data is DSF (rather than BSDF)? */
27		long            dstart;         /* data start offset in file */
28		} PGINPUT;
#	Line 28 | Line 32 | int            ninpfiles;      /* number of input files */
32
33		/* Compare incident angles */
34		static int
35	<	cmp_inang(const void *p1, const void *p2)
35	>	cmp_indir(const void *p1, const void *p2)
36		{
37		const PGINPUT   *inp1 = (const PGINPUT *)p1;
38		const PGINPUT   *inp2 = (const PGINPUT *)p2;
39	+	int             ydif = inp1->igp[1] - inp2->igp[1];
40
41	<	if (inp1->theta > inp2->theta+FTINY)
42	<	return(1);
43	<	if (inp1->theta < inp2->theta-FTINY)
44	<	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);
41	>	if (ydif)
42	>	return(ydif);
43	>
44	>	return(inp1->igp[0] - inp2->igp[0]);
45		}
46
47		/* Prepare a PAB-Opto input file by reading its header */
#	Line 49 | Line 49 | static int
49		init_pabopto_inp(const int i, const char *fname)
50		{
51		FILE    *fp = fopen(fname, "r");
52	+	FVECT   dv;
53		char    buf[2048];
54		int     c;
55
#	Line 62 | Line 63 | init_pabopto_inp(const int i, const char *fname)
63		inpfile[i].theta = inpfile[i].phi = -10001.;
64		/* read header information */
65		while ((c = getc(fp)) == '#' || c == EOF) {
66	+	char    typ[32];
67		if (fgets(buf, sizeof(buf), fp) == NULL) {
68		fputs(fname, stderr);
69		fputs(": unexpected EOF\n", stderr);
70		fclose(fp);
71		return(0);
72		}
73	<	if (!strcmp(buf, "format: theta phi DSF\n")) {
72	<	inpfile[i].isDSF = 1;
73	>	if (sscanf(buf, "sample_name \"%[^\"]\"", bsdf_name) == 1)
74		continue;
75	+	if (sscanf(buf, "format: theta phi %s", typ) == 1) {
76	+	if (!strcasecmp(typ, "DSF")) {
77	+	inpfile[i].isDSF = 1;
78	+	continue;
79	+	}
80	+	if (!strcasecmp(typ, "BSDF")) {
81	+	inpfile[i].isDSF = 0;
82	+	continue;
83	+	}
84		}
75	–	if (!strcmp(buf, "format: theta phi BSDF\n")) {
76	–	inpfile[i].isDSF = 0;
77	–	continue;
78	–	}
85		if (sscanf(buf, "intheta %lf", &inpfile[i].theta) == 1)
86		continue;
87		if (sscanf(buf, "inphi %lf", &inpfile[i].phi) == 1)
#	Line 96 | Line 102 | init_pabopto_inp(const int i, const char *fname)
102		fputs(": unknown incident angle\n", stderr);
103		return(0);
104		}
105	+	/* convert angle to grid position */
106	+	dv[2] = sin(M_PI/180.*inpfile[i].theta);
107	+	dv[0] = cos(M_PI/180.*inpfile[i].phi)*dv[2];
108	+	dv[1] = sin(M_PI/180.*inpfile[i].phi)*dv[2];
109	+	dv[2] = sqrt(1. - dv[2]*dv[2]);
110	+	pos_from_vec(inpfile[i].igp, dv);
111		return(1);
112		}
113
#	Line 103 | Line 115 | init_pabopto_inp(const int i, const char *fname)
115		static int
116		add_pabopto_inp(const int i)
117		{
118	<	FILE    *fp = fopen(inpfile[i].fname, "r");
119	<	double  theta_out, phi_out, val;
120	<	int     n, c;
118	>	FILE            *fp = fopen(inpfile[i].fname, "r");
119	>	double          theta_out, phi_out, val;
120	>	int             n, c;
121
122		if (fp == NULL || fseek(fp, inpfile[i].dstart, 0) == EOF) {
123		fputs(inpfile[i].fname, stderr);
124		fputs(": cannot open\n", stderr);
125		return(0);
126		}
115	–	#ifdef DEBUG
116	–	fprintf(stderr, "Loading measurements from '%s'...\n", inpfile[i].fname);
117	–	#endif
127		/* prepare input grid */
128	<	if (!i || cmp_inang(&inpfile[i-1], &inpfile[i])) {
129	<	if (i)                  /* need to process previous incidence */
128	>	if (!i || cmp_indir(&inpfile[i-1], &inpfile[i])) {
129	>	if (i)                  /* process previous incidence */
130		make_rbfrep();
131		#ifdef DEBUG
132	<	fprintf(stderr, "New incident (theta,phi)=(%f,%f)\n",
132	>	fprintf(stderr, "New incident (theta,phi)=(%.1f,%.1f)\n",
133		inpfile[i].theta, inpfile[i].phi);
134		#endif
135		new_bsdf_data(inpfile[i].theta, inpfile[i].phi);
136		}
137	+	#ifdef DEBUG
138	+	fprintf(stderr, "Loading measurements from '%s'...\n", inpfile[i].fname);
139	+	#endif
140		/* read scattering data */
141		while (fscanf(fp, "%lf %lf %lf\n", &theta_out, &phi_out, &val) == 3)
142		add_bsdf_data(theta_out, phi_out, val, inpfile[i].isDSF);
#	Line 139 | Line 151 | add_pabopto_inp(const int i)
151		return(1);
152		}
153
154	+	#ifndef TEST_MAIN
155		/* Read in PAB-Opto BSDF files and output RBF interpolant */
156		int
157		main(int argc, char *argv[])
#	Line 171 | Line 184 | main(int argc, char *argv[])
184		for (i = 0; i < ninpfiles; i++)
185		if (!init_pabopto_inp(i, argv[i+1]))
186		return(1);
187	<	qsort(inpfile, ninpfiles, sizeof(PGINPUT), &cmp_inang);
187	>	qsort(inpfile, ninpfiles, sizeof(PGINPUT), &cmp_indir);
188		/* compile measurements */
189		for (i = 0; i < ninpfiles; i++)
190		if (!add_pabopto_inp(i))
#	Line 185 | Line 198 | userr:
198		progname);
199		return(1);
200		}
201	+	#else
202	+	/* Test main produces a Radiance model from the given input file */
203	+	int
204	+	main(int argc, char *argv[])
205	+	{
206	+	PGINPUT pginp;
207	+	char    buf[128];
208	+	FILE    *pfp;
209	+	double  bsdf, min_log;
210	+	FVECT   dir;
211	+	int     i, j, n;
212	+
213	+	progname = argv[0];
214	+	if (argc != 2) {
215	+	fprintf(stderr, "Usage: %s input.dat > output.rad\n", progname);
216	+	return(1);
217	+	}
218	+	ninpfiles = 1;
219	+	inpfile = &pginp;
220	+	if (!init_pabopto_inp(0, argv[1]) || !add_pabopto_inp(0))
221	+	return(1);
222	+	/* reduce data set */
223	+	if (make_rbfrep() == NULL) {
224	+	fprintf(stderr, "%s: nothing to plot!\n", progname);
225	+	exit(1);
226	+	}
227	+	#ifdef DEBUG
228	+	fprintf(stderr, "Minimum BSDF = %.4f\n", bsdf_min);
229	+	#endif
230	+	min_log = log(bsdf_min*.5 + 1e-5);
231	+	#if 1                                           /* produce spheres at meas. */
232	+	puts("void plastic yellow\n0\n0\n5 .6 .4 .01 .04 .08\n");
233	+	n = 0;
234	+	for (i = 0; i < GRIDRES; i++)
235	+	for (j = 0; j < GRIDRES; j++)
236	+	if (dsf_grid[i][j].sum.n > 0) {
237	+	ovec_from_pos(dir, i, j);
238	+	bsdf = dsf_grid[i][j].sum.v /
239	+	(dsf_grid[i][j].sum.n*output_orient*dir[2]);
240	+	if (bsdf <= bsdf_min*.6)
241	+	continue;
242	+	bsdf = log(bsdf + 1e-5) - min_log;
243	+	ovec_from_pos(dir, i, j);
244	+	printf("yellow sphere s%04d\n0\n0\n", ++n);
245	+	printf("4 %.6g %.6g %.6g %.6g\n\n",
246	+	dir[0]*bsdf, dir[1]*bsdf, dir[2]*bsdf,
247	+	.007*bsdf);
248	+	}
249	+	#endif
250	+	#if 1                                           /* spheres at RBF peaks */
251	+	puts("void plastic red\n0\n0\n5 .8 .01 .01 .04 .08\n");
252	+	for (n = 0; n < dsf_list->nrbf; n++) {
253	+	RBFVAL  *rbf = &dsf_list->rbfa[n];
254	+	ovec_from_pos(dir, rbf->gx, rbf->gy);
255	+	bsdf = eval_rbfrep(dsf_list, dir) / (output_orient*dir[2]);
256	+	bsdf = log(bsdf + 1e-5) - min_log;
257	+	printf("red sphere p%04d\n0\n0\n", ++n);
258	+	printf("4 %.6g %.6g %.6g %.6g\n\n",
259	+	dir[0]*bsdf, dir[1]*bsdf, dir[2]*bsdf,
260	+	.011*bsdf);
261	+	}
262	+	#endif
263	+	#if 1                                           /* output continuous surface */
264	+	puts("void trans tgreen\n0\n0\n7 .7 1 .7 .04 .04 .9 1\n");
265	+	fflush(stdout);
266	+	sprintf(buf, "gensurf tgreen bsdf - - - %d %d", GRIDRES-1, GRIDRES-1);
267	+	pfp = popen(buf, "w");
268	+	if (pfp == NULL) {
269	+	fprintf(stderr, "%s: cannot open '| %s'\n", progname, buf);
270	+	return(1);
271	+	}
272	+	for (i = 0; i < GRIDRES; i++)
273	+	for (j = 0; j < GRIDRES; j++) {
274	+	ovec_from_pos(dir, i, j);
275	+	bsdf = eval_rbfrep(dsf_list, dir) / (output_orient*dir[2]);
276	+	bsdf = log(bsdf + 1e-5) - min_log;
277	+	fprintf(pfp, "%.8e %.8e %.8e\n",
278	+	dir[0]*bsdf, dir[1]*bsdf, dir[2]*bsdf);
279	+	}
280	+	if (pclose(pfp) != 0)
281	+	return(1);
282	+	#endif
283	+	return(0);
284	+	}
285	+	#endif

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