src/cv/bsdf2rad.c

#ifndef lint
static const char RCSid[] = "$Id: bsdf2rad.c,v 2.3 2013/10/31 18:19:18 greg Exp $";
#endif
/*
 *  Plot 3-D BSDF output based on scattering interpolant or XML representation
 */

#define _USE_MATH_DEFINES
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include "bsdfrep.h"

const float     colarr[6][3] = {
                .7, 1., .7,
                1., .7, .7,
                .7, .7, 1.,
                1., .5, 1.,
                1., 1., .5,
                .5, 1., 1.
        };

char    *progname;

/* Produce a Radiance model plotting the indicated incident direction(s) */
int
main(int argc, char *argv[])
{
        int     showPeaks = 0;
        int     doTrans = 0;
        int     inpXML = -1;
        RBFNODE *rbf = NULL;
        FILE    *fp;
        char    buf[128];
        SDData  myBSDF;
        double  bsdf, min_log;
        FVECT   idir, odir;
        int     i, j, n;
                                                /* check arguments */
        progname = argv[0];
        if (argc > 1 && !strcmp(argv[1], "-p")) {
                ++showPeaks;
                ++argv; --argc;
        }
        if (argc > 1 && !strcmp(argv[1], "-t")) {
                ++doTrans;
                ++argv; --argc;
        }
        if (argc >= 4 && (n = strlen(argv[1])-4) > 0) {
                if (!strcasecmp(argv[1]+n, ".xml"))
                        inpXML = 1;
                else if (!strcasecmp(argv[1]+n, ".sir"))
                        inpXML = 0;
        }
        if (inpXML < 0) {
                fprintf(stderr, "Usage: %s [-p] bsdf.sir theta1 phi1 .. > output.rad\n", progname);
                fprintf(stderr, "   Or: %s [-t] bsdf.xml theta1 phi1 .. > output.rad\n", progname);
                return(1);
        }
                                                /* load input */
        if (inpXML) {
                SDclearBSDF(&myBSDF, argv[1]);
                if (SDreportError(SDloadFile(&myBSDF, argv[1]), stderr))
                        return(1);
                bsdf_min = 1./M_PI;
                if (myBSDF.rf != NULL && myBSDF.rLambFront.cieY < bsdf_min*M_PI)
                        bsdf_min = myBSDF.rLambFront.cieY/M_PI;
                if (myBSDF.rb != NULL && myBSDF.rLambBack.cieY < bsdf_min*M_PI)
                        bsdf_min = myBSDF.rLambBack.cieY/M_PI;
                if ((myBSDF.tf != NULL) | (myBSDF.tb != NULL) &&
                                myBSDF.tLamb.cieY < bsdf_min*M_PI)
                        bsdf_min = myBSDF.tLamb.cieY/M_PI;
                if (doTrans && (myBSDF.tf == NULL) & (myBSDF.tb == NULL)) {
                        fprintf(stderr, "%s: no transmitted component in '%s'\n",
                                        progname, argv[1]);
                        return(1);
                }
        } else {
                fp = fopen(argv[1], "rb");
                if (fp == NULL) {
                        fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n",
                                        progname, argv[1]);
                        return(1);
                }
                if (!load_bsdf_rep(fp))
                        return(1);
                fclose(fp);
        }
#ifdef DEBUG
        fprintf(stderr, "Minimum BSDF set to %.4f\n", bsdf_min);
#endif
        min_log = log(bsdf_min*.5);
                                                /* output BSDF rep. */
        for (n = 0; (n < 6) & (2*n+3 < argc); n++) {
                double  theta = atof(argv[2*n+2]);
                if (inpXML) {
                        input_orient = (theta <= 90.) ? 1 : -1;
                        output_orient = doTrans ? -input_orient : input_orient;
                }
                idir[2] = sin((M_PI/180.)*theta);
                idir[0] = idir[2] * cos((M_PI/180.)*atof(argv[2*n+3]));
                idir[1] = idir[2] * sin((M_PI/180.)*atof(argv[2*n+3]));
                idir[2] = input_orient * sqrt(1. - idir[2]*idir[2]);
#ifdef DEBUG
                fprintf(stderr, "Computing BSDF for incident direction (%.1f,%.1f)\n",
                                get_theta180(idir), get_phi360(idir));
#endif
                if (!inpXML)
                        rbf = advect_rbf(idir, 15000);
#ifdef DEBUG
                if (inpXML)
                        fprintf(stderr, "Hemispherical %s: %.3f\n",
                                (output_orient > 0 ? "reflection" : "transmission"),
                                SDdirectHemi(idir, SDsampSp|SDsampDf |
                                                (output_orient > 0 ?
                                                 SDsampR : SDsampT), &myBSDF));
                else if (rbf == NULL)
                        fputs("Empty RBF\n", stderr);
                else
                        fprintf(stderr, "Hemispherical %s: %.3f\n",
                                (output_orient > 0 ? "reflection" : "transmission"),
                                rbf->vtotal);
#endif
                printf("void trans tmat\n0\n0\n7 %f %f %f .04 .04 .9 1\n",
                                colarr[n][0], colarr[n][1], colarr[n][2]);
                if (showPeaks && rbf != NULL) {
                        printf("void plastic pmat\n0\n0\n5 %f %f %f .04 .08\n",
                                1.-colarr[n][0], 1.-colarr[n][1], 1.-colarr[n][2]);
                        for (i = 0; i < rbf->nrbf; i++) {
                                ovec_from_pos(odir, rbf->rbfa[i].gx, rbf->rbfa[i].gy);
                                bsdf = eval_rbfrep(rbf, odir) / (output_orient*odir[2]);
                                bsdf = log(bsdf) - min_log;
                                printf("pmat sphere p%d\n0\n0\n4 %f %f %f %f\n",
                                        i+1, odir[0]*bsdf, odir[1]*bsdf, odir[2]*bsdf,
                                                .007*bsdf);
                        }
                }
                fflush(stdout);
                sprintf(buf, "gensurf tmat bsdf - - - %d %d", GRIDRES-1, GRIDRES-1);
                fp = popen(buf, "w");
                if (fp == NULL) {
                        fprintf(stderr, "%s: cannot open '| %s'\n", progname, buf);
                        return(1);
                }
                for (i = 0; i < GRIDRES; i++)
                    for (j = 0; j < GRIDRES; j++) {
                        ovec_from_pos(odir, i, j);
                        if (inpXML) {
                                SDValue sval;
                                if (SDreportError(SDevalBSDF(&sval, odir,
                                                        idir, &myBSDF), stderr))
                                        return(1);
                                bsdf = sval.cieY;
                        } else
                                bsdf = eval_rbfrep(rbf, odir) /
                                                (output_orient*odir[2]);
                        bsdf = log(bsdf) - min_log;
                        fprintf(fp, "%.8e %.8e %.8e\n",
                                        odir[0]*bsdf, odir[1]*bsdf, odir[2]*bsdf);
                    }
                if (rbf != NULL)
                        free(rbf);
                if (pclose(fp))
                        return(1);
        }
        return(0);
}
Revision:	2.4
Committed:	Thu Nov 21 20:09:26 2013 UTC (10 years, 5 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.3:	+90 -30 lines
Log Message:	Added ability to create models from XML files
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.4	static const char RCSid[] = "$Id: bsdf2rad.c,v 2.3 2013/10/31 18:19:18 greg Exp $";
3	greg	2.1	#endif
4			/*
5	greg	2.4	* Plot 3-D BSDF output based on scattering interpolant or XML representation
6	greg	2.1	*/
7
8			#define _USE_MATH_DEFINES
9			#include <stdio.h>
10	greg	2.4	#include <string.h>
11	greg	2.1	#include <stdlib.h>
12			#include <math.h>
13			#include "bsdfrep.h"
14
15			const float colarr[6][3] = {
16			.7, 1., .7,
17			1., .7, .7,
18			.7, .7, 1.,
19			1., .5, 1.,
20			1., 1., .5,
21			.5, 1., 1.
22			};
23
24			char *progname;
25
26			/* Produce a Radiance model plotting the indicated incident direction(s) */
27			int
28			main(int argc, char *argv[])
29			{
30	greg	2.2	int showPeaks = 0;
31	greg	2.4	int doTrans = 0;
32			int inpXML = -1;
33			RBFNODE *rbf = NULL;
34			FILE *fp;
35	greg	2.1	char buf[128];
36	greg	2.4	SDData myBSDF;
37	greg	2.1	double bsdf, min_log;
38	greg	2.4	FVECT idir, odir;
39	greg	2.1	int i, j, n;
40	greg	2.4	/* check arguments */
41	greg	2.1	progname = argv[0];
42	greg	2.2	if (argc > 1 && !strcmp(argv[1], "-p")) {
43			++showPeaks;
44			++argv; --argc;
45			}
46	greg	2.4	if (argc > 1 && !strcmp(argv[1], "-t")) {
47			++doTrans;
48			++argv; --argc;
49			}
50			if (argc >= 4 && (n = strlen(argv[1])-4) > 0) {
51			if (!strcasecmp(argv[1]+n, ".xml"))
52			inpXML = 1;
53			else if (!strcasecmp(argv[1]+n, ".sir"))
54			inpXML = 0;
55			}
56			if (inpXML < 0) {
57	greg	2.2	fprintf(stderr, "Usage: %s [-p] bsdf.sir theta1 phi1 .. > output.rad\n", progname);
58	greg	2.4	fprintf(stderr, " Or: %s [-t] bsdf.xml theta1 phi1 .. > output.rad\n", progname);
59	greg	2.1	return(1);
60			}
61			/* load input */
62	greg	2.4	if (inpXML) {
63			SDclearBSDF(&myBSDF, argv[1]);
64			if (SDreportError(SDloadFile(&myBSDF, argv[1]), stderr))
65			return(1);
66			bsdf_min = 1./M_PI;
67			if (myBSDF.rf != NULL && myBSDF.rLambFront.cieY < bsdf_min*M_PI)
68			bsdf_min = myBSDF.rLambFront.cieY/M_PI;
69			if (myBSDF.rb != NULL && myBSDF.rLambBack.cieY < bsdf_min*M_PI)
70			bsdf_min = myBSDF.rLambBack.cieY/M_PI;
71			if ((myBSDF.tf != NULL) \| (myBSDF.tb != NULL) &&
72			myBSDF.tLamb.cieY < bsdf_min*M_PI)
73			bsdf_min = myBSDF.tLamb.cieY/M_PI;
74			if (doTrans && (myBSDF.tf == NULL) & (myBSDF.tb == NULL)) {
75			fprintf(stderr, "%s: no transmitted component in '%s'\n",
76			progname, argv[1]);
77			return(1);
78			}
79			} else {
80			fp = fopen(argv[1], "rb");
81			if (fp == NULL) {
82			fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n",
83			progname, argv[1]);
84			return(1);
85			}
86			if (!load_bsdf_rep(fp))
87			return(1);
88			fclose(fp);
89	greg	2.1	}
90	greg	2.4	#ifdef DEBUG
91			fprintf(stderr, "Minimum BSDF set to %.4f\n", bsdf_min);
92			#endif
93	greg	2.1	min_log = log(bsdf_min*.5);
94	greg	2.2	/* output BSDF rep. */
95	greg	2.1	for (n = 0; (n < 6) & (2*n+3 < argc); n++) {
96	greg	2.4	double theta = atof(argv[2*n+2]);
97			if (inpXML) {
98			input_orient = (theta <= 90.) ? 1 : -1;
99			output_orient = doTrans ? -input_orient : input_orient;
100			}
101			idir[2] = sin((M_PI/180.)*theta);
102			idir[0] = idir[2] * cos((M_PI/180.)atof(argv[2n+3]));
103			idir[1] = idir[2] * sin((M_PI/180.)atof(argv[2n+3]));
104			idir[2] = input_orient * sqrt(1. - idir[2]*idir[2]);
105	greg	2.3	#ifdef DEBUG
106	greg	2.4	fprintf(stderr, "Computing BSDF for incident direction (%.1f,%.1f)\n",
107			get_theta180(idir), get_phi360(idir));
108	greg	2.3	#endif
109	greg	2.4	if (!inpXML)
110			rbf = advect_rbf(idir, 15000);
111	greg	2.3	#ifdef DEBUG
112	greg	2.4	if (inpXML)
113			fprintf(stderr, "Hemispherical %s: %.3f\n",
114			(output_orient > 0 ? "reflection" : "transmission"),
115			SDdirectHemi(idir, SDsampSp\|SDsampDf \|
116			(output_orient > 0 ?
117			SDsampR : SDsampT), &myBSDF));
118			else if (rbf == NULL)
119			fputs("Empty RBF\n", stderr);
120	greg	2.1	else
121	greg	2.4	fprintf(stderr, "Hemispherical %s: %.3f\n",
122			(output_orient > 0 ? "reflection" : "transmission"),
123			rbf->vtotal);
124	greg	2.3	#endif
125	greg	2.2	printf("void trans tmat\n0\n0\n7 %f %f %f .04 .04 .9 1\n",
126			colarr[n][0], colarr[n][1], colarr[n][2]);
127			if (showPeaks && rbf != NULL) {
128			printf("void plastic pmat\n0\n0\n5 %f %f %f .04 .08\n",
129			1.-colarr[n][0], 1.-colarr[n][1], 1.-colarr[n][2]);
130			for (i = 0; i < rbf->nrbf; i++) {
131	greg	2.4	ovec_from_pos(odir, rbf->rbfa[i].gx, rbf->rbfa[i].gy);
132			bsdf = eval_rbfrep(rbf, odir) / (output_orient*odir[2]);
133	greg	2.2	bsdf = log(bsdf) - min_log;
134			printf("pmat sphere p%d\n0\n0\n4 %f %f %f %f\n",
135	greg	2.4	i+1, odir[0]bsdf, odir[1]bsdf, odir[2]*bsdf,
136	greg	2.2	.007*bsdf);
137			}
138			}
139			fflush(stdout);
140			sprintf(buf, "gensurf tmat bsdf - - - %d %d", GRIDRES-1, GRIDRES-1);
141			fp = popen(buf, "w");
142			if (fp == NULL) {
143			fprintf(stderr, "%s: cannot open '\| %s'\n", progname, buf);
144			return(1);
145			}
146	greg	2.1	for (i = 0; i < GRIDRES; i++)
147			for (j = 0; j < GRIDRES; j++) {
148	greg	2.4	ovec_from_pos(odir, i, j);
149			if (inpXML) {
150			SDValue sval;
151			if (SDreportError(SDevalBSDF(&sval, odir,
152			idir, &myBSDF), stderr))
153			return(1);
154			bsdf = sval.cieY;
155			} else
156			bsdf = eval_rbfrep(rbf, odir) /
157			(output_orient*odir[2]);
158	greg	2.1	bsdf = log(bsdf) - min_log;
159			fprintf(fp, "%.8e %.8e %.8e\n",
160	greg	2.4	odir[0]bsdf, odir[1]bsdf, odir[2]*bsdf);
161	greg	2.1	}
162			if (rbf != NULL)
163			free(rbf);
164			if (pclose(fp))
165			return(1);
166			}
167			return(0);
168			}