src/cv/bsdf2ttree.c

#ifndef lint
static const char RCSid[] = "$Id: bsdf2ttree.c,v 2.7 2012/11/10 19:47:42 greg Exp $";
#endif
/*
 * Load measured BSDF interpolant and write out as XML file with tensor tree.
 *
 *      G. Ward
 */

#define _USE_MATH_DEFINES
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "platform.h"
#include "bsdfrep.h"
                                /* global argv[0] */
char                    *progname;
                                /* percentage to cull (<0 to turn off) */
double                  pctcull = 90.;
                                /* sampling order */
int                     samp_order = 6;

/* Interpolate and output isotropic BSDF data */
static void
interp_isotropic()
{
        const int       sqres = 1<<samp_order;
        FILE            *ofp = NULL;
        char            cmd[128];
        int             ix, ox, oy;
        FVECT           ivec, ovec;
        float           bsdf;
#if DEBUG
        fprintf(stderr, "Writing isotropic order %d ", samp_order);
        if (pctcull >= 0) fprintf(stderr, "data with %.1f%% culling\n", pctcull);
        else fputs("raw data\n", stderr);
#endif
        if (pctcull >= 0) {                     /* begin output */
                sprintf(cmd, "rttree_reduce -h -a -ff -r 3 -t %f -g %d",
                                pctcull, samp_order);
                fflush(stdout);
                ofp = popen(cmd, "w");
                if (ofp == NULL) {
                        fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n",
                                        progname);
                        exit(1);
                }
                SET_FILE_BINARY(ofp);
        } else
                fputs("{\n", stdout);
                                                /* run through directions */
        for (ix = 0; ix < sqres/2; ix++) {
                RBFNODE *rbf;
                SDsquare2disk(ivec, (ix+.5)/sqres, .5);
                ivec[2] = input_orient *
                                sqrt(1. - ivec[0]*ivec[0] - ivec[1]*ivec[1]);
                rbf = advect_rbf(ivec);
                for (ox = 0; ox < sqres; ox++)
                    for (oy = 0; oy < sqres; oy++) {
                        SDsquare2disk(ovec, (ox+.5)/sqres, (oy+.5)/sqres);
                        ovec[2] = output_orient *
                                sqrt(1. - ovec[0]*ovec[0] - ovec[1]*ovec[1]);
                        bsdf = eval_rbfrep(rbf, ovec) * output_orient/ovec[2];
                        if (pctcull >= 0)
                                fwrite(&bsdf, sizeof(bsdf), 1, ofp);
                        else
                                printf("\t%.3e\n", bsdf);
                    }
                if (rbf != NULL)
                        free(rbf);
        }
        if (pctcull >= 0) {                     /* finish output */
                if (pclose(ofp)) {
                        fprintf(stderr, "%s: error running '%s'\n",
                                        progname, cmd);
                        exit(1);
                }
        } else {
                for (ix = sqres*sqres*sqres/2; ix--; )
                        fputs("\t0\n", stdout);
                fputs("}\n", stdout);
        }
}

/* Interpolate and output anisotropic BSDF data */
static void
interp_anisotropic()
{
        const int       sqres = 1<<samp_order;
        FILE            *ofp = NULL;
        char            cmd[128];
        int             ix, iy, ox, oy;
        FVECT           ivec, ovec;
        float           bsdf;
#if DEBUG
        fprintf(stderr, "Writing anisotropic order %d ", samp_order);
        if (pctcull >= 0) fprintf(stderr, "data with %.1f%% culling\n", pctcull);
        else fputs("raw data\n", stderr);
#endif
        if (pctcull >= 0) {                     /* begin output */
                sprintf(cmd, "rttree_reduce -h -a -ff -r 4 -t %f -g %d",
                                pctcull, samp_order);
                fflush(stdout);
                ofp = popen(cmd, "w");
                if (ofp == NULL) {
                        fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n",
                                        progname);
                        exit(1);
                }
        } else
                fputs("{\n", stdout);
                                                /* run through directions */
        for (ix = 0; ix < sqres; ix++)
            for (iy = 0; iy < sqres; iy++) {
                RBFNODE *rbf;
                SDsquare2disk(ivec, (ix+.5)/sqres, (iy+.5)/sqres);
                ivec[2] = input_orient *
                                sqrt(1. - ivec[0]*ivec[0] - ivec[1]*ivec[1]);
                rbf = advect_rbf(ivec);
                for (ox = 0; ox < sqres; ox++)
                    for (oy = 0; oy < sqres; oy++) {
                        SDsquare2disk(ovec, (ox+.5)/sqres, (oy+.5)/sqres);
                        ovec[2] = output_orient *
                                sqrt(1. - ovec[0]*ovec[0] - ovec[1]*ovec[1]);
                        bsdf = eval_rbfrep(rbf, ovec) * output_orient/ovec[2];
                        if (pctcull >= 0)
                                fwrite(&bsdf, sizeof(bsdf), 1, ofp);
                        else
                                printf("\t%.3e\n", bsdf);
                    }
                if (rbf != NULL)
                        free(rbf);
            }
        if (pctcull >= 0) {                     /* finish output */
                if (pclose(ofp)) {
                        fprintf(stderr, "%s: error running '%s'\n",
                                        progname, cmd);
                        exit(1);
                }
        } else
                fputs("}\n", stdout);
}

/* Output XML prologue to stdout */
static void
xml_prologue(int ac, char *av[])
{
        static const char       *bsdf_type[4] = {
                                        "Reflection Front",
                                        "Transmission Front",
                                        "Transmission Back",
                                        "Reflection Back"
                                };

        puts("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
        puts("<WindowElement xmlns=\"http://windows.lbl.gov\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://windows.lbl.gov/BSDF-v1.4.xsd\">");
        fputs("<!-- File produced by:", stdout);
        while (ac-- > 0) {
                fputc(' ', stdout);
                fputs(*av++, stdout);
        }
        puts(" -->");
        puts("<WindowElementType>System</WindowElementType>");
        puts("<FileType>BSDF</FileType>");
        puts("<Optical>");
        puts("<Layer>");
        puts("\t<Material>");
        puts("\t\t<Name>Name</Name>");
        puts("\t\t<Manufacturer>Manufacturer</Manufacturer>");
        puts("\t\t<DeviceType>Other</DeviceType>");
        puts("\t</Material>");
        puts("\t<DataDefinition>");
        printf("\t\t<IncidentDataStructure>TensorTree%c</IncidentDataStructure>\n",
                        single_plane_incident ? '3' : '4');
        puts("\t</DataDefinition>");
        puts("\t<WavelengthData>");
        puts("\t\t<LayerNumber>System</LayerNumber>");
        puts("\t\t<Wavelength unit=\"Integral\">Visible</Wavelength>");
        puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
        puts("\t\t<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum>");
        puts("\t\t<WavelengthDataBlock>");
        printf("\t\t\t<WavelengthDataDirection>%s</WavelengthDataDirection>\n",
                bsdf_type[(input_orient>0)<<1 | (output_orient>0)]);
        puts("\t\t\t<AngleBasis>LBNL/Shirley-Chiu</AngleBasis>");
        puts("\t\t\t<ScatteringDataType>BTDF</ScatteringDataType>");
        puts("\t\t\t<ScatteringData>");
}

/* Output XML epilogue to stdout */
static void
xml_epilogue(void)
{
        puts("\t\t\t</ScatteringData>");
        puts("\t\t</WavelengthDataBlock>");
        puts("\t</WavelengthData>");
        puts("</Layer>");
        puts("</Optical>");
        puts("</WindowElement>");
}

/* Read in BSDF and interpolate as tensor tree representation */
int
main(int argc, char *argv[])
{
        FILE    *fpin = stdin;
        int     i;

        progname = argv[0];
        for (i = 1; i < argc-1 && argv[i][0] == '-'; i++)
                switch (argv[i][1]) {           /* get option */
                case 't':
                        pctcull = atof(argv[++i]);
                        break;
                case 'g':
                        samp_order = atoi(argv[++i]);
                        break;
                default:
                        goto userr;
                }

        if (i == argc-1) {                      /* open input if given */
                fpin = fopen(argv[i], "r");
                if (fpin == NULL) {
                        fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n",
                                        progname, argv[1]);
                        return(1);
                }
        } else if (i < argc-1)
                goto userr;
        SET_FILE_BINARY(fpin);                  /* load BSDF interpolant */
        if (!load_bsdf_rep(fpin))
                return(1);
        fclose(fpin);
        xml_prologue(argc, argv);               /* start XML output */
        if (single_plane_incident)              /* resample dist. */
                interp_isotropic();
        else
                interp_anisotropic();
        xml_epilogue();                         /* finish XML output */
        return(0);
userr:
        fprintf(stderr,
        "Usage: %s [-t pctcull][-g log2grid] [bsdf.sir] > bsdf.xml\n",
                                progname);
        return(1);
}
Revision:	2.8
Committed:	Tue Nov 13 04:23:38 2012 UTC (12 years, 11 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.7:	+3 -3 lines
Log Message:	Tried to improve convergence of RBF fit
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.8	static const char RCSid[] = "$Id: bsdf2ttree.c,v 2.7 2012/11/10 19:47:42 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Load measured BSDF interpolant and write out as XML file with tensor tree.
6			*
7			* G. Ward
8			*/
9
10			#define _USE_MATH_DEFINES
11			#include <stdio.h>
12			#include <stdlib.h>
13			#include <math.h>
14			#include "platform.h"
15			#include "bsdfrep.h"
16			/* global argv[0] */
17			char *progname;
18			/* percentage to cull (<0 to turn off) */
19	greg	2.7	double pctcull = 90.;
20	greg	2.1	/* sampling order */
21			int samp_order = 6;
22
23			/* Interpolate and output isotropic BSDF data */
24			static void
25			interp_isotropic()
26			{
27			const int sqres = 1<<samp_order;
28			FILE *ofp = NULL;
29			char cmd[128];
30			int ix, ox, oy;
31			FVECT ivec, ovec;
32	greg	2.4	float bsdf;
33	greg	2.1	#if DEBUG
34			fprintf(stderr, "Writing isotropic order %d ", samp_order);
35	greg	2.8	if (pctcull >= 0) fprintf(stderr, "data with %.1f%% culling\n", pctcull);
36	greg	2.1	else fputs("raw data\n", stderr);
37			#endif
38			if (pctcull >= 0) { /* begin output */
39	greg	2.7	sprintf(cmd, "rttree_reduce -h -a -ff -r 3 -t %f -g %d",
40	greg	2.1	pctcull, samp_order);
41			fflush(stdout);
42			ofp = popen(cmd, "w");
43			if (ofp == NULL) {
44			fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n",
45			progname);
46			exit(1);
47			}
48			SET_FILE_BINARY(ofp);
49			} else
50			fputs("{\n", stdout);
51			/* run through directions */
52			for (ix = 0; ix < sqres/2; ix++) {
53			RBFNODE *rbf;
54			SDsquare2disk(ivec, (ix+.5)/sqres, .5);
55			ivec[2] = input_orient *
56			sqrt(1. - ivec[0]ivec[0] - ivec[1]ivec[1]);
57			rbf = advect_rbf(ivec);
58			for (ox = 0; ox < sqres; ox++)
59			for (oy = 0; oy < sqres; oy++) {
60			SDsquare2disk(ovec, (ox+.5)/sqres, (oy+.5)/sqres);
61			ovec[2] = output_orient *
62			sqrt(1. - ovec[0]ovec[0] - ovec[1]ovec[1]);
63	greg	2.5	bsdf = eval_rbfrep(rbf, ovec) * output_orient/ovec[2];
64	greg	2.1	if (pctcull >= 0)
65			fwrite(&bsdf, sizeof(bsdf), 1, ofp);
66			else
67			printf("\t%.3e\n", bsdf);
68			}
69	greg	2.3	if (rbf != NULL)
70			free(rbf);
71	greg	2.1	}
72			if (pctcull >= 0) { /* finish output */
73			if (pclose(ofp)) {
74			fprintf(stderr, "%s: error running '%s'\n",
75			progname, cmd);
76			exit(1);
77			}
78			} else {
79			for (ix = sqressqressqres/2; ix--; )
80			fputs("\t0\n", stdout);
81			fputs("}\n", stdout);
82			}
83			}
84
85			/* Interpolate and output anisotropic BSDF data */
86			static void
87			interp_anisotropic()
88			{
89			const int sqres = 1<<samp_order;
90			FILE *ofp = NULL;
91			char cmd[128];
92			int ix, iy, ox, oy;
93			FVECT ivec, ovec;
94	greg	2.4	float bsdf;
95	greg	2.1	#if DEBUG
96			fprintf(stderr, "Writing anisotropic order %d ", samp_order);
97	greg	2.8	if (pctcull >= 0) fprintf(stderr, "data with %.1f%% culling\n", pctcull);
98	greg	2.1	else fputs("raw data\n", stderr);
99			#endif
100			if (pctcull >= 0) { /* begin output */
101	greg	2.7	sprintf(cmd, "rttree_reduce -h -a -ff -r 4 -t %f -g %d",
102	greg	2.1	pctcull, samp_order);
103			fflush(stdout);
104			ofp = popen(cmd, "w");
105			if (ofp == NULL) {
106			fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n",
107			progname);
108			exit(1);
109			}
110			} else
111			fputs("{\n", stdout);
112			/* run through directions */
113			for (ix = 0; ix < sqres; ix++)
114			for (iy = 0; iy < sqres; iy++) {
115			RBFNODE *rbf;
116			SDsquare2disk(ivec, (ix+.5)/sqres, (iy+.5)/sqres);
117			ivec[2] = input_orient *
118			sqrt(1. - ivec[0]ivec[0] - ivec[1]ivec[1]);
119			rbf = advect_rbf(ivec);
120			for (ox = 0; ox < sqres; ox++)
121			for (oy = 0; oy < sqres; oy++) {
122			SDsquare2disk(ovec, (ox+.5)/sqres, (oy+.5)/sqres);
123			ovec[2] = output_orient *
124			sqrt(1. - ovec[0]ovec[0] - ovec[1]ovec[1]);
125	greg	2.5	bsdf = eval_rbfrep(rbf, ovec) * output_orient/ovec[2];
126	greg	2.1	if (pctcull >= 0)
127			fwrite(&bsdf, sizeof(bsdf), 1, ofp);
128			else
129			printf("\t%.3e\n", bsdf);
130			}
131	greg	2.3	if (rbf != NULL)
132			free(rbf);
133	greg	2.1	}
134			if (pctcull >= 0) { /* finish output */
135			if (pclose(ofp)) {
136			fprintf(stderr, "%s: error running '%s'\n",
137			progname, cmd);
138			exit(1);
139			}
140			} else
141			fputs("}\n", stdout);
142			}
143
144	greg	2.5	/* Output XML prologue to stdout */
145			static void
146			xml_prologue(int ac, char *av[])
147			{
148			static const char *bsdf_type[4] = {
149	greg	2.7	"Reflection Front",
150			"Transmission Front",
151	greg	2.5	"Transmission Back",
152	greg	2.7	"Reflection Back"
153	greg	2.5	};
154
155	greg	2.6	puts("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
156			puts("<WindowElement xmlns=\"http://windows.lbl.gov\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://windows.lbl.gov/BSDF-v1.4.xsd\">");
157	greg	2.5	fputs("<!-- File produced by:", stdout);
158			while (ac-- > 0) {
159			fputc(' ', stdout);
160			fputs(*av++, stdout);
161			}
162			puts(" -->");
163	greg	2.6	puts("<WindowElementType>System</WindowElementType>");
164			puts("<FileType>BSDF</FileType>");
165			puts("<Optical>");
166			puts("<Layer>");
167			puts("\t<Material>");
168			puts("\t\t<Name>Name</Name>");
169			puts("\t\t<Manufacturer>Manufacturer</Manufacturer>");
170			puts("\t\t<DeviceType>Other</DeviceType>");
171			puts("\t</Material>");
172	greg	2.5	puts("\t<DataDefinition>");
173			printf("\t\t<IncidentDataStructure>TensorTree%c</IncidentDataStructure>\n",
174			single_plane_incident ? '3' : '4');
175			puts("\t</DataDefinition>");
176	greg	2.6	puts("\t<WavelengthData>");
177			puts("\t\t<LayerNumber>System</LayerNumber>");
178			puts("\t\t<Wavelength unit=\"Integral\">Visible</Wavelength>");
179			puts("\t\t<SourceSpectrum>CIE Illuminant D65 1nm.ssp</SourceSpectrum>");
180			puts("\t\t<DetectorSpectrum>ASTM E308 1931 Y.dsp</DetectorSpectrum>");
181			puts("\t\t<WavelengthDataBlock>");
182	greg	2.5	printf("\t\t\t<WavelengthDataDirection>%s</WavelengthDataDirection>\n",
183			bsdf_type[(input_orient>0)<<1 \| (output_orient>0)]);
184	greg	2.6	puts("\t\t\t<AngleBasis>LBNL/Shirley-Chiu</AngleBasis>");
185			puts("\t\t\t<ScatteringDataType>BTDF</ScatteringDataType>");
186	greg	2.5	puts("\t\t\t<ScatteringData>");
187			}
188
189			/* Output XML epilogue to stdout */
190			static void
191			xml_epilogue(void)
192			{
193	greg	2.6	puts("\t\t\t</ScatteringData>");
194			puts("\t\t</WavelengthDataBlock>");
195			puts("\t</WavelengthData>");
196			puts("</Layer>");
197			puts("</Optical>");
198			puts("</WindowElement>");
199	greg	2.5	}
200
201	greg	2.1	/* Read in BSDF and interpolate as tensor tree representation */
202			int
203			main(int argc, char *argv[])
204			{
205			FILE *fpin = stdin;
206			int i;
207
208	greg	2.5	progname = argv[0];
209			for (i = 1; i < argc-1 && argv[i][0] == '-'; i++)
210			switch (argv[i][1]) { /* get option */
211	greg	2.1	case 't':
212	greg	2.7	pctcull = atof(argv[++i]);
213	greg	2.1	break;
214			case 'g':
215	greg	2.5	samp_order = atoi(argv[++i]);
216	greg	2.1	break;
217			default:
218			goto userr;
219			}
220	greg	2.5
221			if (i == argc-1) { /* open input if given */
222			fpin = fopen(argv[i], "r");
223	greg	2.2	if (fpin == NULL) {
224			fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n",
225			progname, argv[1]);
226			return(1);
227			}
228	greg	2.5	} else if (i < argc-1)
229	greg	2.1	goto userr;
230			SET_FILE_BINARY(fpin); /* load BSDF interpolant */
231			if (!load_bsdf_rep(fpin))
232			return(1);
233	greg	2.5	fclose(fpin);
234			xml_prologue(argc, argv); /* start XML output */
235	greg	2.1	if (single_plane_incident) /* resample dist. */
236			interp_isotropic();
237			else
238			interp_anisotropic();
239	greg	2.5	xml_epilogue(); /* finish XML output */
240	greg	2.1	return(0);
241			userr:
242			fprintf(stderr,
243			"Usage: %s [-t pctcull][-g log2grid] [bsdf.sir] > bsdf.xml\n",
244			progname);
245			return(1);
246			}