src/util/dctimestep.c

#ifndef lint
static const char RCSid[] = "$Id: dctimestep.c,v 2.43 2019/10/23 17:00:14 greg Exp $";
#endif
/*
 * Compute time-step result using Daylight Coefficient method.
 *
 *      G. Ward
 */

#include <ctype.h>
#include "platform.h"
#include "standard.h"
#include "cmatrix.h"
#include "platform.h"
#include "resolu.h"

char    *progname;                      /* global argv[0] */

/* Sum together a set of images and write result to fout */
static int
sum_images(const char *fspec, const CMATRIX *cv, FILE *fout)
{
        int     myDT = DTfromHeader;
        COLR    *scanline = NULL;
        CMATRIX *pmat = NULL;
        int     myXR=0, myYR=0;
        int     i, y;

        if (cv->ncols != 1)
                error(INTERNAL, "expected vector in sum_images()");
        for (i = 0; i < cv->nrows; i++) {
                const COLORV    *scv = cv_lval(cv,i);
                int             flat_file = 0;
                char            fname[1024];
                FILE            *fp;
                long            data_start;
                int             dt, xr, yr;
                COLORV          *psp;
                char            *err;
                                                        /* check for zero */
                if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) &&
                                (myDT != DTfromHeader) | (i < cv->nrows-1))
                        continue;
                                                        /* open next picture */
                sprintf(fname, fspec, i);
                if ((fp = fopen(fname, "rb")) == NULL) {
                        sprintf(errmsg, "cannot open picture '%s'", fname);
                        error(SYSTEM, errmsg);
                }
                dt = DTfromHeader;
                if ((err = cm_getheader(&dt, NULL, NULL, NULL, fp)) != NULL)
                        error(USER, err);
                if ((dt != DTrgbe) & (dt != DTxyze) ||
                                !fscnresolu(&xr, &yr, fp)) {
                        sprintf(errmsg, "file '%s' not a picture", fname);
                        error(USER, errmsg);
                }
                if (myDT == DTfromHeader) {             /* on first one */
                        myDT = dt;
                        myXR = xr; myYR = yr;
                        scanline = (COLR *)malloc(sizeof(COLR)*myXR);
                        if (scanline == NULL)
                                error(SYSTEM, "out of memory in sum_images()");
                        pmat = cm_alloc(myYR, myXR);
                        memset(pmat->cmem, 0, sizeof(COLOR)*myXR*myYR);
                                                        /* finish header */
                        fputformat((char *)cm_fmt_id[myDT], fout);
                        fputc('\n', fout);
                        fflush(fout);
                } else if ((dt != myDT) | (xr != myXR) | (yr != myYR)) {
                        sprintf(errmsg, "picture '%s' format/size mismatch",
                                        fname);
                        error(USER, errmsg);
                }
                                                        /* flat file check */
                if ((data_start = ftell(fp)) > 0 && fseek(fp, 0L, SEEK_END) == 0) {
                        flat_file = (ftell(fp) == data_start + sizeof(COLR)*xr*yr);
                        if (fseek(fp, data_start, SEEK_SET) < 0) {
                                sprintf(errmsg, "cannot seek on picture '%s'", fname);
                                error(SYSTEM, errmsg);
                        }
                }
                psp = pmat->cmem;
                for (y = 0; y < yr; y++) {              /* read it in */
                        COLOR   col;
                        int     x;
                        if (flat_file ? getbinary(scanline, sizeof(COLR), xr, fp) != xr :
                                        freadcolrs(scanline, xr, fp) < 0) {
                                sprintf(errmsg, "error reading picture '%s'",
                                                fname);
                                error(SYSTEM, errmsg);
                        }
                                                        /* sum in scanline */
                        for (x = 0; x < xr; x++, psp += 3) {
                                if (!scanline[x][EXP])
                                        continue;       /* skip zeroes */
                                colr_color(col, scanline[x]);
                                multcolor(col, scv);
                                addcolor(psp, col);
                        }
                }
                fclose(fp);                             /* done this picture */
        }
        free(scanline);
        i = cm_write(pmat, myDT, fout);                 /* write picture */
        cm_free(pmat);                                  /* free data */
        return(i);
}

/* check to see if a string contains a %d or %o specification */
static int
hasNumberFormat(const char *s)
{
        if (s == NULL)
                return(0);

        while (*s) {
                while (*s != '%')
                        if (!*s++)
                                return(0);
                if (*++s == '%') {              /* ignore "%%" */
                        ++s;
                        continue;
                }
                while (isdigit(*s))             /* field length */
                        ++s;
                                                /* field we'll use? */
                if ((*s == 'd') | (*s == 'i') | (*s == 'o') |
                                        (*s == 'x') | (*s == 'X'))
                        return(1);
        }
        return(0);                              /* didn't find one */
}

int
main(int argc, char *argv[])
{
        int             skyfmt = DTfromHeader;
        int             outfmt = DTascii;
        int             headout = 1;
        int             nsteps = 0;
        char            *ofspec = NULL;
        FILE            *ofp = stdout;
        CMATRIX         *cmtx;          /* component vector/matrix result */
        char            fnbuf[256];
        int             a, i;

        progname = argv[0];
                                        /* get options */
        for (a = 1; a < argc && argv[a][0] == '-'; a++)
                switch (argv[a][1]) {
                case 'n':
                        nsteps = atoi(argv[++a]);
                        if (nsteps < 0)
                                goto userr;
                        skyfmt = nsteps ? DTascii : DTfromHeader;
                        break;
                case 'h':
                        headout = !headout;
                        break;
                case 'i':
                        switch (argv[a][2]) {
                        case 'f':
                                skyfmt = DTfloat;
                                break;
                        case 'd':
                                skyfmt = DTdouble;
                                break;
                        case 'a':
                                skyfmt = DTascii;
                                break;
                        default:
                                goto userr;
                        }
                        break;
                case 'o':
                        switch (argv[a][2]) {
                        case '\0':      /* output specification (not format) */
                                ofspec = argv[++a];
                                break;
                        case 'f':
                                outfmt = DTfloat;
                                break;
                        case 'd':
                                outfmt = DTdouble;
                                break;
                        case 'a':
                                outfmt = DTascii;
                                break;
                        case 'c':
                                outfmt = DTrgbe;
                                break;
                        default:
                                goto userr;
                        }
                        break;
                default:
                        goto userr;
                }
        if ((argc-a < 1) | (argc-a > 4))
                goto userr;

        if (argc-a > 2) {                       /* VTDs expression */
                CMATRIX         *smtx, *Dmat, *Tmat, *imtx;
                const char      *ccp;
                                                /* get sky vector/matrix */
                smtx = cm_load(argv[a+3], 0, nsteps, skyfmt);
                nsteps = smtx->ncols;
                                                /* load BSDF */
                if (argv[a+1][0] != '!' &&
                                (ccp = strrchr(argv[a+1], '.')) != NULL &&
                                !strcasecmp(ccp+1, "XML"))
                        Tmat = cm_loadBTDF(argv[a+1]);
                else
                        Tmat = cm_load(argv[a+1], 0, 0, DTfromHeader);
                                                /* load Daylight matrix */
                Dmat = cm_load(argv[a+2], Tmat->ncols,
                                        smtx->nrows, DTfromHeader);
                                                /* multiply vector through */
                imtx = cm_multiply(Dmat, smtx);
                cm_free(Dmat); cm_free(smtx);
                cmtx = cm_multiply(Tmat, imtx);
                cm_free(Tmat); 
                cm_free(imtx);
        } else {                                /* sky vector/matrix only */
                cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt);
                nsteps = cmtx->ncols;
        }
                                                /* prepare output stream */
        if ((ofspec != NULL) & (nsteps == 1) && hasNumberFormat(ofspec)) {
                sprintf(fnbuf, ofspec, 1);
                ofspec = fnbuf;
        }
        if (ofspec != NULL && !hasNumberFormat(ofspec)) {
                if ((ofp = fopen(ofspec, "w")) == NULL) {
                        fprintf(stderr, "%s: cannot open '%s' for output\n",
                                        progname, ofspec);
                        return(1);
                }
                ofspec = NULL;                  /* only need to open once */
        }
        if (hasNumberFormat(argv[a])) {         /* generating image(s) */
                if (outfmt != DTrgbe) {
                        error(WARNING, "changing output type to -oc");
                        outfmt = DTrgbe;
                }
                if (ofspec == NULL) {
                        SET_FILE_BINARY(ofp);
                        newheader("RADIANCE", ofp);
                        printargs(argc, argv, ofp);
                        fputnow(ofp);
                }
                if (nsteps > 1)                 /* multiple output frames? */
                        for (i = 0; i < nsteps; i++) {
                                CMATRIX *cvec = cm_column(cmtx, i);
                                if (ofspec != NULL) {
                                        sprintf(fnbuf, ofspec, i);
                                        if ((ofp = fopen(fnbuf, "wb")) == NULL) {
                                                fprintf(stderr,
                                        "%s: cannot open '%s' for output\n",
                                                        progname, fnbuf);
                                                return(1);
                                        }
                                        newheader("RADIANCE", ofp);
                                        printargs(argc, argv, ofp);
                                        fputnow(ofp);
                                }
                                fprintf(ofp, "FRAME=%d\n", i);
                                if (!sum_images(argv[a], cvec, ofp))
                                        return(1);
                                if (ofspec != NULL) {
                                        if (fclose(ofp) == EOF) {
                                                fprintf(stderr,
                                                "%s: error writing to '%s'\n",
                                                        progname, fnbuf);
                                                return(1);
                                        }
                                        ofp = stdout;
                                }
                                cm_free(cvec);
                        }
                else if (!sum_images(argv[a], cmtx, ofp))
                        return(1);
        } else {                                /* generating vector/matrix */
                CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader);
                CMATRIX *rmtx = cm_multiply(Vmat, cmtx);
                cm_free(Vmat);
                if (ofspec != NULL) {           /* multiple vector files? */
                        const char      *wtype = (outfmt==DTascii) ? "w" : "wb";
                        for (i = 0; i < nsteps; i++) {
                                CMATRIX *rvec = cm_column(rmtx, i);
                                sprintf(fnbuf, ofspec, i);
                                if ((ofp = fopen(fnbuf, wtype)) == NULL) {
                                        fprintf(stderr,
                                        "%s: cannot open '%s' for output\n",
                                                        progname, fnbuf);
                                        return(1);
                                }
#ifdef getc_unlocked
                                flockfile(ofp);
#endif
                                if (headout) {  /* header output */
                                        newheader("RADIANCE", ofp);
                                        printargs(argc, argv, ofp);
                                        fputnow(ofp);
                                        fprintf(ofp, "FRAME=%d\n", i);
                                        fprintf(ofp, "NROWS=%d\n", rvec->nrows);
                                        fputs("NCOLS=1\nNCOMP=3\n", ofp);
                                        if ((outfmt == 'f') | (outfmt == 'd'))
                                                fputendian(ofp);
                                        fputformat((char *)cm_fmt_id[outfmt], ofp);
                                        fputc('\n', ofp);
                                }
                                cm_write(rvec, outfmt, ofp);
                                if (fclose(ofp) == EOF) {
                                        fprintf(stderr,
                                                "%s: error writing to '%s'\n",
                                                        progname, fnbuf);
                                        return(1);
                                }
                                ofp = stdout;
                                cm_free(rvec);
                        }
                } else {
#ifdef getc_unlocked
                        flockfile(ofp);
#endif
                        if (outfmt != DTascii)
                                SET_FILE_BINARY(ofp);
                        if (headout) {          /* header output */
                                newheader("RADIANCE", ofp);
                                printargs(argc, argv, ofp);
                                fputnow(ofp);
                                fprintf(ofp, "NROWS=%d\n", rmtx->nrows);
                                fprintf(ofp, "NCOLS=%d\n", rmtx->ncols);
                                fputs("NCOMP=3\n", ofp);
                                if ((outfmt == 'f') | (outfmt == 'd'))
                                        fputendian(ofp);
                                fputformat((char *)cm_fmt_id[outfmt], ofp);
                                fputc('\n', ofp);
                        }
                        cm_write(rmtx, outfmt, ofp);
                }
                cm_free(rmtx);
        }
        if (fflush(ofp) == EOF) {               /* final clean-up */
                fprintf(stderr, "%s: write error on output\n", progname);
                return(1);
        }
        cm_free(cmtx);
        return(0);
userr:
        fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-i{f|d|h}][-o{f|d|c}] DCspec [skyf]\n",
                                progname);
        fprintf(stderr, "   or: %s [-n nsteps][-o ospec][-i{f|d|h}][-o{f|d|c}] Vspec Tbsdf Dmat.dat [skyf]\n",
                                progname);
        return(1);
}
Revision:	2.44
Committed:	Wed Oct 23 17:16:26 2019 UTC (6 years ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.43:	+7 -3 lines
Log Message:	Added warning if -oc not set for picture output
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.44	static const char RCSid[] = "$Id: dctimestep.c,v 2.43 2019/10/23 17:00:14 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Compute time-step result using Daylight Coefficient method.
6			*
7			* G. Ward
8			*/
9
10			#include <ctype.h>
11	schorsch	2.37	#include "platform.h"
12	greg	2.1	#include "standard.h"
13	greg	2.28	#include "cmatrix.h"
14	greg	2.1	#include "platform.h"
15			#include "resolu.h"
16
17			char progname; / global argv[0] */
18
19	greg	2.24	/* Sum together a set of images and write result to fout */
20	greg	2.1	static int
21	greg	2.13	sum_images(const char fspec, const CMATRIX cv, FILE *fout)
22	greg	2.1	{
23			int myDT = DTfromHeader;
24	greg	2.38	COLR *scanline = NULL;
25	greg	2.24	CMATRIX *pmat = NULL;
26			int myXR=0, myYR=0;
27	greg	2.1	int i, y;
28
29			if (cv->ncols != 1)
30	greg	2.35	error(INTERNAL, "expected vector in sum_images()");
31	greg	2.1	for (i = 0; i < cv->nrows; i++) {
32			const COLORV *scv = cv_lval(cv,i);
33	greg	2.39	int flat_file = 0;
34	greg	2.1	char fname[1024];
35			FILE *fp;
36	greg	2.39	long data_start;
37	greg	2.1	int dt, xr, yr;
38			COLORV *psp;
39	greg	2.31	char *err;
40	greg	2.14	/* check for zero */
41	greg	2.19	if ((scv[RED] == 0) & (scv[GRN] == 0) & (scv[BLU] == 0) &&
42			(myDT != DTfromHeader) \| (i < cv->nrows-1))
43	greg	2.14	continue;
44	greg	2.1	/* open next picture */
45			sprintf(fname, fspec, i);
46	greg	2.31	if ((fp = fopen(fname, "rb")) == NULL) {
47	greg	2.1	sprintf(errmsg, "cannot open picture '%s'", fname);
48			error(SYSTEM, errmsg);
49			}
50	greg	2.31	dt = DTfromHeader;
51	greg	2.41	if ((err = cm_getheader(&dt, NULL, NULL, NULL, fp)) != NULL)
52	greg	2.31	error(USER, err);
53	greg	2.1	if ((dt != DTrgbe) & (dt != DTxyze) \|\|
54			!fscnresolu(&xr, &yr, fp)) {
55			sprintf(errmsg, "file '%s' not a picture", fname);
56			error(USER, errmsg);
57			}
58			if (myDT == DTfromHeader) { /* on first one */
59			myDT = dt;
60			myXR = xr; myYR = yr;
61	greg	2.38	scanline = (COLR )malloc(sizeof(COLR)myXR);
62	greg	2.1	if (scanline == NULL)
63			error(SYSTEM, "out of memory in sum_images()");
64			pmat = cm_alloc(myYR, myXR);
65			memset(pmat->cmem, 0, sizeof(COLOR)myXRmyYR);
66	greg	2.2	/* finish header */
67	greg	2.30	fputformat((char *)cm_fmt_id[myDT], fout);
68	greg	2.13	fputc('\n', fout);
69			fflush(fout);
70	greg	2.1	} else if ((dt != myDT) \| (xr != myXR) \| (yr != myYR)) {
71			sprintf(errmsg, "picture '%s' format/size mismatch",
72			fname);
73			error(USER, errmsg);
74			}
75	greg	2.39	/* flat file check */
76			if ((data_start = ftell(fp)) > 0 && fseek(fp, 0L, SEEK_END) == 0) {
77			flat_file = (ftell(fp) == data_start + sizeof(COLR)xryr);
78			if (fseek(fp, data_start, SEEK_SET) < 0) {
79			sprintf(errmsg, "cannot seek on picture '%s'", fname);
80			error(SYSTEM, errmsg);
81			}
82			}
83	greg	2.1	psp = pmat->cmem;
84			for (y = 0; y < yr; y++) { /* read it in */
85	greg	2.38	COLOR col;
86	greg	2.1	int x;
87	greg	2.39	if (flat_file ? getbinary(scanline, sizeof(COLR), xr, fp) != xr :
88			freadcolrs(scanline, xr, fp) < 0) {
89	greg	2.1	sprintf(errmsg, "error reading picture '%s'",
90			fname);
91			error(SYSTEM, errmsg);
92			}
93			/* sum in scanline */
94			for (x = 0; x < xr; x++, psp += 3) {
95	greg	2.38	if (!scanline[x][EXP])
96			continue; /* skip zeroes */
97			colr_color(col, scanline[x]);
98			multcolor(col, scv);
99			addcolor(psp, col);
100	greg	2.1	}
101			}
102			fclose(fp); /* done this picture */
103			}
104			free(scanline);
105	greg	2.30	i = cm_write(pmat, myDT, fout); /* write picture */
106			cm_free(pmat); /* free data */
107			return(i);
108	greg	2.1	}
109
110	greg	2.11	/* check to see if a string contains a %d or %o specification */
111			static int
112			hasNumberFormat(const char *s)
113	greg	2.1	{
114	greg	2.24	if (s == NULL)
115			return(0);
116
117	greg	2.18	while (*s) {
118			while (*s != '%')
119			if (!*s++)
120			return(0);
121			if (++s == '%') { / ignore "%%" */
122			++s;
123			continue;
124			}
125			while (isdigit(s)) / field length */
126			++s;
127			/* field we'll use? */
128			if ((s == 'd') \| (s == 'i') \| (*s == 'o') \|
129			(s == 'x') \| (s == 'X'))
130			return(1);
131			}
132			return(0); /* didn't find one */
133	greg	2.1	}
134
135			int
136			main(int argc, char *argv[])
137			{
138	greg	2.34	int skyfmt = DTfromHeader;
139	greg	2.30	int outfmt = DTascii;
140	greg	2.34	int headout = 1;
141			int nsteps = 0;
142	greg	2.24	char *ofspec = NULL;
143			FILE *ofp = stdout;
144			CMATRIX cmtx; / component vector/matrix result */
145			char fnbuf[256];
146			int a, i;
147	greg	2.1
148			progname = argv[0];
149	greg	2.24	/* get options */
150	greg	2.25	for (a = 1; a < argc && argv[a][0] == '-'; a++)
151			switch (argv[a][1]) {
152	greg	2.24	case 'n':
153			nsteps = atoi(argv[++a]);
154	greg	2.31	if (nsteps < 0)
155	greg	2.24	goto userr;
156	greg	2.34	skyfmt = nsteps ? DTascii : DTfromHeader;
157			break;
158			case 'h':
159			headout = !headout;
160	greg	2.24	break;
161	greg	2.25	case 'i':
162			switch (argv[a][2]) {
163			case 'f':
164			skyfmt = DTfloat;
165			break;
166			case 'd':
167			skyfmt = DTdouble;
168			break;
169			case 'a':
170			skyfmt = DTascii;
171			break;
172			default:
173			goto userr;
174			}
175			break;
176	greg	2.30	case 'o':
177			switch (argv[a][2]) {
178			case '\0': /* output specification (not format) */
179			ofspec = argv[++a];
180			break;
181			case 'f':
182			outfmt = DTfloat;
183			break;
184			case 'd':
185			outfmt = DTdouble;
186			break;
187			case 'a':
188			outfmt = DTascii;
189			break;
190	greg	2.43	case 'c':
191			outfmt = DTrgbe;
192			break;
193	greg	2.30	default:
194			goto userr;
195			}
196			break;
197	greg	2.24	default:
198			goto userr;
199			}
200			if ((argc-a < 1) \| (argc-a > 4))
201			goto userr;
202	greg	2.1
203	greg	2.24	if (argc-a > 2) { /* VTDs expression */
204	greg	2.36	CMATRIX smtx, Dmat, Tmat, imtx;
205			const char *ccp;
206	greg	2.24	/* get sky vector/matrix */
207	greg	2.25	smtx = cm_load(argv[a+3], 0, nsteps, skyfmt);
208	greg	2.35	nsteps = smtx->ncols;
209	greg	2.12	/* load BSDF */
210	greg	2.36	if (argv[a+1][0] != '!' &&
211			(ccp = strrchr(argv[a+1], '.')) != NULL &&
212			!strcasecmp(ccp+1, "XML"))
213			Tmat = cm_loadBTDF(argv[a+1]);
214			else
215			Tmat = cm_load(argv[a+1], 0, 0, DTfromHeader);
216	greg	2.5	/* load Daylight matrix */
217	greg	2.36	Dmat = cm_load(argv[a+2], Tmat->ncols,
218	greg	2.24	smtx->nrows, DTfromHeader);
219	greg	2.1	/* multiply vector through */
220	greg	2.24	imtx = cm_multiply(Dmat, smtx);
221			cm_free(Dmat); cm_free(smtx);
222	greg	2.29	cmtx = cm_multiply(Tmat, imtx);
223			cm_free(Tmat);
224	greg	2.24	cm_free(imtx);
225			} else { /* sky vector/matrix only */
226	greg	2.25	cmtx = cm_load(argv[a+1], 0, nsteps, skyfmt);
227	greg	2.35	nsteps = cmtx->ncols;
228	greg	2.24	}
229			/* prepare output stream */
230			if ((ofspec != NULL) & (nsteps == 1) && hasNumberFormat(ofspec)) {
231			sprintf(fnbuf, ofspec, 1);
232			ofspec = fnbuf;
233			}
234			if (ofspec != NULL && !hasNumberFormat(ofspec)) {
235			if ((ofp = fopen(ofspec, "w")) == NULL) {
236			fprintf(stderr, "%s: cannot open '%s' for output\n",
237			progname, ofspec);
238			return(1);
239			}
240			ofspec = NULL; /* only need to open once */
241	greg	2.12	}
242	greg	2.24	if (hasNumberFormat(argv[a])) { /* generating image(s) */
243	greg	2.44	if (outfmt != DTrgbe) {
244			error(WARNING, "changing output type to -oc");
245			outfmt = DTrgbe;
246			}
247	greg	2.24	if (ofspec == NULL) {
248			SET_FILE_BINARY(ofp);
249			newheader("RADIANCE", ofp);
250			printargs(argc, argv, ofp);
251			fputnow(ofp);
252			}
253			if (nsteps > 1) /* multiple output frames? */
254			for (i = 0; i < nsteps; i++) {
255			CMATRIX *cvec = cm_column(cmtx, i);
256			if (ofspec != NULL) {
257	greg	2.40	sprintf(fnbuf, ofspec, i);
258	greg	2.24	if ((ofp = fopen(fnbuf, "wb")) == NULL) {
259			fprintf(stderr,
260			"%s: cannot open '%s' for output\n",
261			progname, fnbuf);
262			return(1);
263			}
264			newheader("RADIANCE", ofp);
265			printargs(argc, argv, ofp);
266			fputnow(ofp);
267			}
268	greg	2.40	fprintf(ofp, "FRAME=%d\n", i);
269	greg	2.24	if (!sum_images(argv[a], cvec, ofp))
270			return(1);
271			if (ofspec != NULL) {
272			if (fclose(ofp) == EOF) {
273			fprintf(stderr,
274			"%s: error writing to '%s'\n",
275			progname, fnbuf);
276			return(1);
277			}
278			ofp = stdout;
279			}
280			cm_free(cvec);
281			}
282			else if (!sum_images(argv[a], cmtx, ofp))
283	greg	2.1	return(1);
284	greg	2.24	} else { /* generating vector/matrix */
285			CMATRIX *Vmat = cm_load(argv[a], 0, cmtx->nrows, DTfromHeader);
286			CMATRIX *rmtx = cm_multiply(Vmat, cmtx);
287	greg	2.1	cm_free(Vmat);
288	greg	2.30	if (ofspec != NULL) { /* multiple vector files? */
289			const char *wtype = (outfmt==DTascii) ? "w" : "wb";
290	greg	2.24	for (i = 0; i < nsteps; i++) {
291			CMATRIX *rvec = cm_column(rmtx, i);
292	greg	2.40	sprintf(fnbuf, ofspec, i);
293	greg	2.30	if ((ofp = fopen(fnbuf, wtype)) == NULL) {
294	greg	2.24	fprintf(stderr,
295			"%s: cannot open '%s' for output\n",
296			progname, fnbuf);
297			return(1);
298			}
299	greg	2.31	#ifdef getc_unlocked
300			flockfile(ofp);
301			#endif
302	greg	2.34	if (headout) { /* header output */
303			newheader("RADIANCE", ofp);
304			printargs(argc, argv, ofp);
305			fputnow(ofp);
306	greg	2.40	fprintf(ofp, "FRAME=%d\n", i);
307	greg	2.34	fprintf(ofp, "NROWS=%d\n", rvec->nrows);
308			fputs("NCOLS=1\nNCOMP=3\n", ofp);
309	greg	2.42	if ((outfmt == 'f') \| (outfmt == 'd'))
310			fputendian(ofp);
311	greg	2.34	fputformat((char *)cm_fmt_id[outfmt], ofp);
312			fputc('\n', ofp);
313			}
314	greg	2.30	cm_write(rvec, outfmt, ofp);
315	greg	2.24	if (fclose(ofp) == EOF) {
316			fprintf(stderr,
317			"%s: error writing to '%s'\n",
318			progname, fnbuf);
319			return(1);
320			}
321			ofp = stdout;
322			cm_free(rvec);
323			}
324	greg	2.30	} else {
325	greg	2.31	#ifdef getc_unlocked
326			flockfile(ofp);
327			#endif
328	greg	2.30	if (outfmt != DTascii)
329			SET_FILE_BINARY(ofp);
330	greg	2.34	if (headout) { /* header output */
331	greg	2.30	newheader("RADIANCE", ofp);
332			printargs(argc, argv, ofp);
333			fputnow(ofp);
334	greg	2.33	fprintf(ofp, "NROWS=%d\n", rmtx->nrows);
335	greg	2.31	fprintf(ofp, "NCOLS=%d\n", rmtx->ncols);
336			fputs("NCOMP=3\n", ofp);
337	greg	2.42	if ((outfmt == 'f') \| (outfmt == 'd'))
338			fputendian(ofp);
339	greg	2.30	fputformat((char *)cm_fmt_id[outfmt], ofp);
340			fputc('\n', ofp);
341			}
342			cm_write(rmtx, outfmt, ofp);
343			}
344	greg	2.24	cm_free(rmtx);
345			}
346			if (fflush(ofp) == EOF) { /* final clean-up */
347			fprintf(stderr, "%s: write error on output\n", progname);
348			return(1);
349	greg	2.1	}
350	greg	2.24	cm_free(cmtx);
351	greg	2.1	return(0);
352	greg	2.24	userr:
353	greg	2.44	fprintf(stderr, "Usage: %s [-n nsteps][-o ospec][-i{f\|d\|h}][-o{f\|d\|c}] DCspec [skyf]\n",
354	greg	2.24	progname);
355	greg	2.44	fprintf(stderr, " or: %s [-n nsteps][-o ospec][-i{f\|d\|h}][-o{f\|d\|c}] Vspec Tbsdf Dmat.dat [skyf]\n",
356	greg	2.24	progname);
357			return(1);
358	greg	2.1	}