src/hd/rhcopy.c

#ifndef lint
static const char       RCSid[] = "$Id: rhcopy.c,v 3.32 2019/10/21 18:19:32 greg Exp $";
#endif
/*
 * Copy data into a holodeck file
 */

#include "platform.h"
#include "rterror.h"
#include "holo.h"
#include "view.h"

#ifndef BKBSIZE
#define BKBSIZE         256             /* beam clump size (kilobytes) */
#endif

int     checkdepth = 1;         /* check depth (!-d option)? */
int     checkrepeats = 0;       /* check for repeats (-u option)? */
int     frompicz;               /* input from pictures & depth-buffers? */
int     noutsects;              /* number of output sections */
char    obstr, unobstr;         /* flag pointer values */

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

struct phead {
        VIEW    vw;
        double  expos;
        short   gotview;
        short   badfmt;
        short   altprims;
};
static int openholo(char *fname, int append);
static void addray(FVECT ro, FVECT rd, double d, COLR cv);
static gethfunc holheadline;
static int bpcmp(const void *b1p, const void *b2p);
static int addclump(HOLO *hp, int *bq, int nb);
static void addholo(char *hdf);
static gethfunc picheadline;
static void addpicz(char *pcf, char *zbf);


int
main(
        int     argc,
        char    *argv[]
)
{
        int     i;

        progname = argv[0];
        frompicz = -1;
        for (i = 2; i < argc && argv[i][0] == '-'; i++)
                switch (argv[i][1]) {
                case 'u':
                        checkrepeats = 1;
                        break;
                case 'd':
                        checkdepth = 0;
                        break;
                case 'h':
                        frompicz = 0;
                        break;
                case 'p':
                        frompicz = 1;
                        break;
                default:
                        goto userr;
                }
        if (i >= argc || frompicz < 0)
                goto userr;
        if (frompicz && (argc-i)%2)
                goto userr;
        noutsects = openholo(argv[1], 1);
        if (frompicz) {
                for ( ; i < argc; i += 2)
                        addpicz(argv[i], argv[i+1]);
        } else {
                if (BKBSIZE*1024*1.5 > hdcachesize)
                        hdcachesize = BKBSIZE*1024*1.5;
                for ( ; i < argc; i++)
                        addholo(argv[i]);
        }
        quit(0);
userr:
        fprintf(stderr, "Usage: %s output.hdk [-u][-d] -h inp1.hdk ..\n",
                        progname);
        fprintf(stderr, "   Or: %s output.hdk [-u][-d] -p inp1.hdr inp1.zbf ..\n",
                        progname);
        exit(1);
}


#define H_BADF  01
#define H_OBST  02
#define H_OBSF  04
#define H_SWAP  010

static int
holheadline(            /* check holodeck header line */
        char    *s,
        void    *vhf
)
{
        int     be;
        char    fmt[MAXFMTLEN];
        int     *hf = vhf;

        if (formatval(fmt, s)) {
                if (strcmp(fmt, HOLOFMT))
                        *hf |= H_BADF;
                else
                        *hf &= ~H_BADF;
                return(0);
        }
        if (!strncmp(s, "OBSTRUCTIONS=", 13)) {
                s += 13;
                while (*s == ' ') s++;
                if ((*s == 't') | (*s == 'T'))
                        *hf |= H_OBST;
                else if ((*s == 'f') | (*s == 'F'))
                        *hf |= H_OBSF;
                else
                        error(WARNING, "bad OBSTRUCTIONS value in holodeck");
                return(0);
        }
        if ((be = isbigendian(s)) >= 0) {
                if (be != nativebigendian())
                        *hf |= H_SWAP;
        }
        return(0);
}

int
openholo(               /* open existing holodeck file for i/o */
        char    *fname,
        int     append
)
{
        FILE    *fp;
        int     fd;
        int     hflags = 0;
        off_t   nextloc;
        int     n;
                                        /* open holodeck file */
        if ((fp = fopen(fname, append ? "rb+" : "rb")) == NULL) {
                sprintf(errmsg, "cannot open \"%s\" for %s", fname,
                                append ? "appending" : "reading");
                error(SYSTEM, errmsg);
        }
                                        /* check header and magic number */
        if (getheader(fp, holheadline, &hflags) < 0 ||
                        hflags&(H_BADF|H_SWAP) || getw(fp) != HOLOMAGIC) {
                sprintf(errmsg, "holodeck \"%s\" not in expected format", fname);
                error(USER, errmsg);
        }
        fd = dup(fileno(fp));                   /* dup file handle */
        nextloc = ftell(fp);                    /* get stdio position */
        fclose(fp);                             /* done with stdio */
        for (n = 0; nextloc > 0L; n++) {        /* initialize each section */
                lseek(fd, nextloc, SEEK_SET);
                read(fd, (char *)&nextloc, sizeof(nextloc));
                hdinit(fd, NULL)->priv = hflags&H_OBST ? &obstr :
                                hflags&H_OBSF ? &unobstr : (char *)NULL;
        }
        return(n);
}

#undef H_BADF
#undef H_OBST
#undef H_OBSF


void
addray(         /* add a ray to our output holodeck */
        FVECT   ro,
        FVECT   rd,
        double  d,
        COLR    cv
)
{
        int     sn, bi, n;
        HOLO    *hp;
        GCOORD  gc[2];
        uby8    rr[2][2];
        BEAM    *bp;
        double  d0, d1;
        unsigned        dc;
        RAYVAL  *rv;
                                /* check each output section */
        for (sn = noutsects; sn--; ) {
                hp = hdlist[sn];
                d0 = hdinter(gc, rr, &d1, hp, ro, rd);
                if (d <= d0 || d1 < -0.001)
                        continue;       /* missed section */
                if (checkdepth) {               /* check depth */
                        if (hp->priv == &obstr && d0 < -0.001)
                                continue;       /* ray starts too late */
                        if (hp->priv == &unobstr && d < 0.999*d1)
                                continue;       /* ray ends too soon */
                }
                dc = hdcode(hp, d-d0);
                bi = hdbindex(hp, gc);          /* check for duplicates */
                if (checkrepeats && (bp = hdgetbeam(hp, bi)) != NULL) {
                        for (n = bp->nrm, rv = hdbray(bp); n--; rv++)
                                if ((hp->priv != NULL || rv->d == dc) &&
                                                rv->r[0][0] == rr[0][0] &&
                                                rv->r[0][1] == rr[0][1] &&
                                                rv->r[1][0] == rr[1][0] &&
                                                rv->r[1][1] == rr[1][1])
                                        break;
                        if (n >= 0)
                                continue;       /* found a matching ray */
                }
                rv = hdnewrays(hp, bi, 1);
                rv->d = dc;
                rv->r[0][0] = rr[0][0]; rv->r[0][1] = rr[0][1];
                rv->r[1][0] = rr[1][0]; rv->r[1][1] = rr[1][1];
                copycolr(rv->v, cv);
        }
}


static BEAMI    *beamdir;

static int
bpcmp(                  /* compare beam positions on disk */
        const void      *b1p,
        const void      *b2p
)
{
        off_t   pdif = beamdir[*(int*)b1p].fo - beamdir[*(int*)b2p].fo;

        if (pdif > 0L) return(1);
        if (pdif < 0L) return(-1);
        return(0);
}

static int
addclump(               /* transfer the given clump and free */
        HOLO    *hp,
        int     *bq,
        int     nb
)
{
        GCOORD  gc[2];
        FVECT   ro, rd;
        double  d;
        int     i;
        int     k;
        BEAM    *bp;
                                        /* sort based on file position */
        beamdir = hp->bi;
        qsort((char *)bq, nb, sizeof(*bq), bpcmp);
                                        /* transfer each beam */
        for (i = 0; i < nb; i++) {
                bp = hdgetbeam(hp, bq[i]);
                hdbcoord(gc, hp, bq[i]);
                                                /* add each ray to output */
                for (k = bp->nrm; k--; ) {
                        d = hdray(ro, rd, hp, gc, hdbray(bp)[k].r);
                        if (hp->priv == &unobstr)
                                VSUM(ro, ro, rd, d);
                        else
                                d = 0.;
                        d = hddepth(hp, hdbray(bp)[k].d) - d;
                        addray(ro, rd, d, hdbray(bp)[k].v);
                }
                hdfreebeam(hp, bq[i]);          /* free the beam */
        }
        return(0);
}


void
addholo(                        /* add a holodeck file */
        char    *hdf
)
{
        int     fd;
                                        /* open the holodeck for reading */
        openholo(hdf, 0);
        fd = hdlist[noutsects]->fd;     /* remember the file handle */
        while (hdlist[noutsects] != NULL) {     /* load each section */
                                                        /* clump the beams */
                clumpbeams(hdlist[noutsects], 0, BKBSIZE*1024, addclump);
                hddone(hdlist[noutsects]);              /* free the section */
        }
        close(fd);                      /* close input file */
        hdflush(NULL);                  /* flush output */
}


static int
picheadline(            /* process picture header line */
        char    *s,
        void    *vph
)
{
        char    fmt[32];
        struct phead *ph = vph;

        if (formatval(fmt, s)) {
                ph->badfmt = strcmp(fmt, COLRFMT);
                return(0);
        }
        if (isprims(s)) {
                ph->altprims++;         /* don't want to deal with this */
                return(0);
        }
        if (isexpos(s)) {
                ph->expos *= exposval(s);
                return(0);
        }
        if (isview(s)) {
                ph->gotview += sscanview(&ph->vw, s);
                return(0);
        }
        return(0);
}


void
addpicz(                /* add a picture + depth-buffer */
        char    *pcf,
        char    *zbf
)
{
        FILE    *pfp;
        int     zfd;
        COLR    *cscn;
        float   *zscn;
        struct phead    phd;
        int     eshft;
        double  emult;
        RESOLU  prs;
        RREAL   vl[2];
        FVECT   ro, rd;
        double  aftd;
        COLOR   ctmp;
        int     j;
        int     i;
                                /* open files */
        if ((pfp = fopen(pcf, "rb")) == NULL) {
                sprintf(errmsg, "cannot open picture file \"%s\"", pcf);
                error(SYSTEM, pcf);
        }
        if ((zfd = open(zbf, O_RDONLY)) < 0) {
                sprintf(errmsg, "cannot open depth file \"%s\"", zbf);
                error(SYSTEM, pcf);
        }
        SET_FD_BINARY(zfd);
                                /* load picture header */
        phd.vw = stdview;
        phd.expos = 1.0;
        phd.badfmt = phd.gotview = phd.altprims = 0;
        if (getheader(pfp, picheadline, &phd) < 0 ||
                        phd.badfmt || !fgetsresolu(&prs, pfp)) {
                sprintf(errmsg, "bad format for picture file \"%s\"", pcf);
                error(USER, errmsg);
        }
        if (!phd.gotview || setview(&phd.vw) != NULL) {
                sprintf(errmsg, "missing/illegal view in picture \"%s\"",
                                pcf);
                error(USER, errmsg);
        }
        if (phd.altprims) {
                sprintf(errmsg, "ignoring color primaries in picture \"%s\"",
                                pcf);
                error(WARNING, errmsg);
        }
                                /* figure out what to do about exposure */
        if ((phd.expos < 0.99) | (phd.expos > 1.01)) {
                emult = -log(phd.expos)/log(2.);
                eshft = emult >= 0. ? emult+.5 : emult-.5;
                emult -= (double)eshft;
                if ((emult <= 0.01) & (emult >= -0.01))
                        emult = -1.;
                else {
                        emult = 1./phd.expos;
                        eshft = 0;
                }
        } else {
                emult = -1.;
                eshft = 0;
        }
                                /* allocate buffers */
        cscn = (COLR *)malloc(scanlen(&prs)*sizeof(COLR));
        zscn = (float *)malloc(scanlen(&prs)*sizeof(float));
        if ((cscn == NULL) | (zscn == NULL))
                error(SYSTEM, "out of memory in addpicz");
                                /* read and process each scanline */
        for (j = 0; j < numscans(&prs); j++) {
                i = scanlen(&prs);                      /* read colrs */
                if (freadcolrs(cscn, i, pfp) < 0) {
                        sprintf(errmsg, "error reading picture \"%s\"", pcf);
                        error(USER, errmsg);
                }
                if (eshft)                              /* shift exposure */
                        shiftcolrs(cscn, i, eshft);
                                                        /* read depth */
                if (read(zfd, zscn, i*sizeof(float)) != i*sizeof(float)) {
                        sprintf(errmsg, "error reading depth file \"%s\"", zbf);
                        error(USER, errmsg);
                }
                while (i--) {                           /* process each pixel */
                        if (zscn[i] <= 0.0)
                                continue;               /* illegal depth */
                        pix2loc(vl, &prs, i, j);
                        aftd = viewray(ro, rd, &phd.vw, vl[0], vl[1]);
                        if (aftd < -FTINY)
                                continue;               /* off view */
                        if (aftd > FTINY && zscn[i] > aftd)
                                continue;               /* aft clipped */
                        if (emult > 0.) {               /* whatta pain */
                                colr_color(ctmp, cscn[i]);
                                scalecolor(ctmp, emult);
                                setcolr(cscn[i], colval(ctmp,RED),
                                        colval(ctmp,GRN), colval(ctmp,BLU));
                        }
                        addray(ro, rd, (double)zscn[i], cscn[i]);
                }
        }
                                /* write output and free beams */
        hdflush(NULL);
                                /* clean up */
        free((void *)cscn);
        free((void *)zscn);
        fclose(pfp);
        close(zfd);
}


void
eputs(                  /* put error message to stderr */
        char  *s
)
{
        static int  midline = 0;

        if (!*s)
                return;
        if (!midline++) {       /* prepend line with program name */
                fputs(progname, stderr);
                fputs(": ", stderr);
        }
        fputs(s, stderr);
        if (s[strlen(s)-1] == '\n') {
                fflush(stderr);
                midline = 0;
        }
}


void
quit(                   /* exit the program gracefully */
        int     code
)
{
        hdsync(NULL, 1);        /* write out any buffered data */
        exit(code);
}
Revision:	3.33
Committed:	Thu Nov 7 23:17:58 2019 UTC (4 years, 5 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R3
Changes since 3.32:	+9 -3 lines
Log Message:	Added check for byte-swapping
#	User	Rev	Content
1	gregl	3.1	#ifndef lint
2	greg	3.33	static const char RCSid[] = "$Id: rhcopy.c,v 3.32 2019/10/21 18:19:32 greg Exp $";
3	gregl	3.1	#endif
4			/*
5			* Copy data into a holodeck file
6			*/
7
8	greg	3.21	#include "platform.h"
9	schorsch	3.22	#include "rterror.h"
10	gregl	3.1	#include "holo.h"
11			#include "view.h"
12
13	gwlarson	3.10	#ifndef BKBSIZE
14			#define BKBSIZE 256 /* beam clump size (kilobytes) */
15	gregl	3.7	#endif
16
17	gwlarson	3.14	int checkdepth = 1; /* check depth (!-d option)? */
18			int checkrepeats = 0; /* check for repeats (-u option)? */
19	gregl	3.1	int frompicz; /* input from pictures & depth-buffers? */
20			int noutsects; /* number of output sections */
21	gregl	3.2	char obstr, unobstr; /* flag pointer values */
22	gregl	3.1
23			char progname; / global argv[0] */
24
25	schorsch	3.22	struct phead {
26			VIEW vw;
27			double expos;
28			short gotview;
29			short badfmt;
30			short altprims;
31			};
32			static int openholo(char *fname, int append);
33			static void addray(FVECT ro, FVECT rd, double d, COLR cv);
34	schorsch	3.23	static gethfunc holheadline;
35	schorsch	3.22	static int bpcmp(const void b1p, const void b2p);
36			static int addclump(HOLO hp, int bq, int nb);
37			static void addholo(char *hdf);
38	schorsch	3.23	static gethfunc picheadline;
39	schorsch	3.22	static void addpicz(char pcf, char zbf);
40
41
42	gregl	3.1
43	schorsch	3.22	int
44			main(
45			int argc,
46			char *argv[]
47			)
48	gregl	3.1	{
49			int i;
50
51			progname = argv[0];
52	gregl	3.5	frompicz = -1;
53			for (i = 2; i < argc && argv[i][0] == '-'; i++)
54			switch (argv[i][1]) {
55	gregl	3.8	case 'u':
56	gregl	3.5	checkrepeats = 1;
57			break;
58	gregl	3.8	case 'd':
59	gregl	3.5	checkdepth = 0;
60			break;
61			case 'h':
62			frompicz = 0;
63			break;
64			case 'p':
65			frompicz = 1;
66			break;
67			default:
68			goto userr;
69			}
70			if (i >= argc \|\| frompicz < 0)
71	gregl	3.1	goto userr;
72	gregl	3.5	if (frompicz && (argc-i)%2)
73	gregl	3.1	goto userr;
74			noutsects = openholo(argv[1], 1);
75	gwlarson	3.10	if (frompicz) {
76	gregl	3.5	for ( ; i < argc; i += 2)
77	gregl	3.1	addpicz(argv[i], argv[i+1]);
78	gwlarson	3.10	} else {
79			if (BKBSIZE10241.5 > hdcachesize)
80			hdcachesize = BKBSIZE10241.5;
81	gregl	3.5	for ( ; i < argc; i++)
82	gregl	3.1	addholo(argv[i]);
83	gwlarson	3.10	}
84	gregl	3.1	quit(0);
85			userr:
86	gregl	3.8	fprintf(stderr, "Usage: %s output.hdk [-u][-d] -h inp1.hdk ..\n",
87	gregl	3.1	progname);
88	greg	3.24	fprintf(stderr, " Or: %s output.hdk [-u][-d] -p inp1.hdr inp1.zbf ..\n",
89	gregl	3.5	progname);
90	gregl	3.1	exit(1);
91			}
92
93
94	gregl	3.2	#define H_BADF 01
95			#define H_OBST 02
96			#define H_OBSF 04
97	greg	3.33	#define H_SWAP 010
98	gregl	3.2
99	schorsch	3.23	static int
100	schorsch	3.22	holheadline( /* check holodeck header line */
101	greg	3.31	char *s,
102	schorsch	3.23	void *vhf
103	schorsch	3.22	)
104	gregl	3.1	{
105	greg	3.33	int be;
106	greg	3.30	char fmt[MAXFMTLEN];
107	schorsch	3.23	int *hf = vhf;
108	gregl	3.1
109			if (formatval(fmt, s)) {
110	gregl	3.2	if (strcmp(fmt, HOLOFMT))
111			*hf \|= H_BADF;
112			else
113			*hf &= ~H_BADF;
114	gwlarson	3.9	return(0);
115	gregl	3.1	}
116			if (!strncmp(s, "OBSTRUCTIONS=", 13)) {
117			s += 13;
118			while (*s == ' ') s++;
119	schorsch	3.19	if ((s == 't') \| (s == 'T'))
120	gregl	3.2	*hf \|= H_OBST;
121	schorsch	3.19	else if ((s == 'f') \| (s == 'F'))
122	gregl	3.2	*hf \|= H_OBSF;
123	gregl	3.1	else
124			error(WARNING, "bad OBSTRUCTIONS value in holodeck");
125	gwlarson	3.9	return(0);
126	gregl	3.1	}
127	greg	3.33	if ((be = isbigendian(s)) >= 0) {
128			if (be != nativebigendian())
129			*hf \|= H_SWAP;
130			}
131	gwlarson	3.9	return(0);
132	gregl	3.1	}
133
134			int
135	schorsch	3.22	openholo( /* open existing holodeck file for i/o */
136			char *fname,
137			int append
138			)
139	gregl	3.1	{
140			FILE *fp;
141			int fd;
142	gregl	3.2	int hflags = 0;
143	greg	3.26	off_t nextloc;
144	gregl	3.1	int n;
145			/* open holodeck file */
146	greg	3.32	if ((fp = fopen(fname, append ? "rb+" : "rb")) == NULL) {
147	gregl	3.1	sprintf(errmsg, "cannot open \"%s\" for %s", fname,
148			append ? "appending" : "reading");
149			error(SYSTEM, errmsg);
150			}
151			/* check header and magic number */
152	schorsch	3.23	if (getheader(fp, holheadline, &hflags) < 0 \|\|
153	greg	3.33	hflags&(H_BADF\|H_SWAP) \|\| getw(fp) != HOLOMAGIC) {
154			sprintf(errmsg, "holodeck \"%s\" not in expected format", fname);
155	gregl	3.1	error(USER, errmsg);
156			}
157			fd = dup(fileno(fp)); /* dup file handle */
158			nextloc = ftell(fp); /* get stdio position */
159			fclose(fp); /* done with stdio */
160			for (n = 0; nextloc > 0L; n++) { /* initialize each section */
161	greg	3.26	lseek(fd, nextloc, SEEK_SET);
162	gregl	3.1	read(fd, (char *)&nextloc, sizeof(nextloc));
163	gregl	3.2	hdinit(fd, NULL)->priv = hflags&H_OBST ? &obstr :
164			hflags&H_OBSF ? &unobstr : (char *)NULL;
165	gregl	3.1	}
166			return(n);
167			}
168
169	gregl	3.2	#undef H_BADF
170			#undef H_OBST
171			#undef H_OBSF
172	gregl	3.1
173	gregl	3.2
174	schorsch	3.22	void
175			addray( /* add a ray to our output holodeck */
176			FVECT ro,
177			FVECT rd,
178			double d,
179			COLR cv
180			)
181	gregl	3.1	{
182	gregl	3.5	int sn, bi, n;
183	greg	3.31	HOLO *hp;
184	gregl	3.1	GCOORD gc[2];
185	greg	3.27	uby8 rr[2][2];
186	gregl	3.5	BEAM *bp;
187	gregl	3.1	double d0, d1;
188	gregl	3.5	unsigned dc;
189	greg	3.31	RAYVAL *rv;
190	gregl	3.1	/* check each output section */
191			for (sn = noutsects; sn--; ) {
192			hp = hdlist[sn];
193			d0 = hdinter(gc, rr, &d1, hp, ro, rd);
194			if (d <= d0 \|\| d1 < -0.001)
195			continue; /* missed section */
196	gregl	3.5	if (checkdepth) { /* check depth */
197			if (hp->priv == &obstr && d0 < -0.001)
198			continue; /* ray starts too late */
199			if (hp->priv == &unobstr && d < 0.999*d1)
200			continue; /* ray ends too soon */
201			}
202			dc = hdcode(hp, d-d0);
203			bi = hdbindex(hp, gc); /* check for duplicates */
204			if (checkrepeats && (bp = hdgetbeam(hp, bi)) != NULL) {
205			for (n = bp->nrm, rv = hdbray(bp); n--; rv++)
206	gwlarson	3.12	if ((hp->priv != NULL \|\| rv->d == dc) &&
207	gregl	3.5	rv->r[0][0] == rr[0][0] &&
208			rv->r[0][1] == rr[0][1] &&
209			rv->r[1][0] == rr[1][0] &&
210			rv->r[1][1] == rr[1][1])
211			break;
212			if (n >= 0)
213			continue; /* found a matching ray */
214			}
215			rv = hdnewrays(hp, bi, 1);
216			rv->d = dc;
217	gregl	3.1	rv->r[0][0] = rr[0][0]; rv->r[0][1] = rr[0][1];
218			rv->r[1][0] = rr[1][0]; rv->r[1][1] = rr[1][1];
219			copycolr(rv->v, cv);
220			}
221			}
222
223
224	gwlarson	3.11	static BEAMI *beamdir;
225
226			static int
227	schorsch	3.22	bpcmp( /* compare beam positions on disk */
228			const void *b1p,
229			const void *b2p
230			)
231	gregl	3.1	{
232	greg	3.31	off_t pdif = beamdir[(int)b1p].fo - beamdir[(int)b2p].fo;
233	gwlarson	3.11
234			if (pdif > 0L) return(1);
235			if (pdif < 0L) return(-1);
236			return(0);
237			}
238
239			static int
240	schorsch	3.22	addclump( /* transfer the given clump and free */
241			HOLO *hp,
242			int *bq,
243			int nb
244			)
245	gwlarson	3.11	{
246	gregl	3.1	GCOORD gc[2];
247			FVECT ro, rd;
248			double d;
249	gwlarson	3.11	int i;
250	greg	3.31	int k;
251			BEAM *bp;
252	gwlarson	3.11	/* sort based on file position */
253			beamdir = hp->bi;
254			qsort((char )bq, nb, sizeof(bq), bpcmp);
255			/* transfer each beam */
256			for (i = 0; i < nb; i++) {
257			bp = hdgetbeam(hp, bq[i]);
258			hdbcoord(gc, hp, bq[i]);
259			/* add each ray to output */
260			for (k = bp->nrm; k--; ) {
261			d = hdray(ro, rd, hp, gc, hdbray(bp)[k].r);
262			if (hp->priv == &unobstr)
263			VSUM(ro, ro, rd, d);
264			else
265			d = 0.;
266			d = hddepth(hp, hdbray(bp)[k].d) - d;
267			addray(ro, rd, d, hdbray(bp)[k].v);
268			}
269			hdfreebeam(hp, bq[i]); /* free the beam */
270	gwlarson	3.10	}
271	gwlarson	3.11	return(0);
272	gwlarson	3.10	}
273
274	schorsch	3.22
275			void
276			addholo( /* add a holodeck file */
277			char *hdf
278			)
279	gwlarson	3.10	{
280			int fd;
281	gregl	3.4	/* open the holodeck for reading */
282			openholo(hdf, 0);
283	gregl	3.1	fd = hdlist[noutsects]->fd; /* remember the file handle */
284	gwlarson	3.10	while (hdlist[noutsects] != NULL) { /* load each section */
285			/* clump the beams */
286	gwlarson	3.11	clumpbeams(hdlist[noutsects], 0, BKBSIZE*1024, addclump);
287	gwlarson	3.10	hddone(hdlist[noutsects]); /* free the section */
288	gregl	3.1	}
289	gwlarson	3.10	close(fd); /* close input file */
290	gwlarson	3.13	hdflush(NULL); /* flush output */
291	gregl	3.1	}
292
293
294
295	schorsch	3.23	static int
296	schorsch	3.22	picheadline( /* process picture header line */
297			char *s,
298	schorsch	3.23	void *vph
299	schorsch	3.22	)
300	gregl	3.1	{
301			char fmt[32];
302	schorsch	3.23	struct phead *ph = vph;
303	gregl	3.1
304			if (formatval(fmt, s)) {
305			ph->badfmt = strcmp(fmt, COLRFMT);
306	gwlarson	3.9	return(0);
307	gregl	3.1	}
308			if (isprims(s)) {
309			ph->altprims++; /* don't want to deal with this */
310	gwlarson	3.9	return(0);
311	gregl	3.1	}
312			if (isexpos(s)) {
313			ph->expos *= exposval(s);
314	gwlarson	3.9	return(0);
315	gregl	3.1	}
316			if (isview(s)) {
317			ph->gotview += sscanview(&ph->vw, s);
318	gwlarson	3.9	return(0);
319	gregl	3.1	}
320	gwlarson	3.9	return(0);
321	gregl	3.1	}
322
323
324	schorsch	3.22	void
325			addpicz( /* add a picture + depth-buffer */
326			char *pcf,
327			char *zbf
328			)
329	gregl	3.1	{
330			FILE *pfp;
331			int zfd;
332			COLR *cscn;
333			float *zscn;
334			struct phead phd;
335			int eshft;
336			double emult;
337			RESOLU prs;
338	schorsch	3.17	RREAL vl[2];
339	gregl	3.1	FVECT ro, rd;
340			double aftd;
341			COLOR ctmp;
342			int j;
343	greg	3.31	int i;
344	gregl	3.1	/* open files */
345	greg	3.32	if ((pfp = fopen(pcf, "rb")) == NULL) {
346	gregl	3.1	sprintf(errmsg, "cannot open picture file \"%s\"", pcf);
347			error(SYSTEM, pcf);
348			}
349			if ((zfd = open(zbf, O_RDONLY)) < 0) {
350			sprintf(errmsg, "cannot open depth file \"%s\"", zbf);
351			error(SYSTEM, pcf);
352			}
353	greg	3.32	SET_FD_BINARY(zfd);
354	gregl	3.1	/* load picture header */
355	schorsch	3.18	phd.vw = stdview;
356	gregl	3.1	phd.expos = 1.0;
357			phd.badfmt = phd.gotview = phd.altprims = 0;
358	schorsch	3.23	if (getheader(pfp, picheadline, &phd) < 0 \|\|
359	gregl	3.1	phd.badfmt \|\| !fgetsresolu(&prs, pfp)) {
360			sprintf(errmsg, "bad format for picture file \"%s\"", pcf);
361			error(USER, errmsg);
362			}
363			if (!phd.gotview \|\| setview(&phd.vw) != NULL) {
364			sprintf(errmsg, "missing/illegal view in picture \"%s\"",
365			pcf);
366			error(USER, errmsg);
367			}
368			if (phd.altprims) {
369	greg	3.28	sprintf(errmsg, "ignoring color primaries in picture \"%s\"",
370	gregl	3.1	pcf);
371			error(WARNING, errmsg);
372			}
373			/* figure out what to do about exposure */
374	schorsch	3.19	if ((phd.expos < 0.99) \| (phd.expos > 1.01)) {
375	gregl	3.1	emult = -log(phd.expos)/log(2.);
376			eshft = emult >= 0. ? emult+.5 : emult-.5;
377			emult -= (double)eshft;
378	schorsch	3.19	if ((emult <= 0.01) & (emult >= -0.01))
379	gregl	3.1	emult = -1.;
380			else {
381			emult = 1./phd.expos;
382			eshft = 0;
383			}
384			} else {
385			emult = -1.;
386			eshft = 0;
387			}
388			/* allocate buffers */
389			cscn = (COLR )malloc(scanlen(&prs)sizeof(COLR));
390			zscn = (float )malloc(scanlen(&prs)sizeof(float));
391	schorsch	3.19	if ((cscn == NULL) \| (zscn == NULL))
392	gregl	3.1	error(SYSTEM, "out of memory in addpicz");
393			/* read and process each scanline */
394			for (j = 0; j < numscans(&prs); j++) {
395			i = scanlen(&prs); /* read colrs */
396			if (freadcolrs(cscn, i, pfp) < 0) {
397			sprintf(errmsg, "error reading picture \"%s\"", pcf);
398			error(USER, errmsg);
399			}
400			if (eshft) /* shift exposure */
401			shiftcolrs(cscn, i, eshft);
402	greg	3.32	/* read depth */
403			if (read(zfd, zscn, isizeof(float)) != isizeof(float)) {
404	gregl	3.1	sprintf(errmsg, "error reading depth file \"%s\"", zbf);
405			error(USER, errmsg);
406			}
407	greg	3.32	while (i--) { /* process each pixel */
408	greg	3.29	if (zscn[i] <= 0.0)
409			continue; /* illegal depth */
410	gregl	3.1	pix2loc(vl, &prs, i, j);
411			aftd = viewray(ro, rd, &phd.vw, vl[0], vl[1]);
412			if (aftd < -FTINY)
413			continue; /* off view */
414			if (aftd > FTINY && zscn[i] > aftd)
415			continue; /* aft clipped */
416			if (emult > 0.) { /* whatta pain */
417			colr_color(ctmp, cscn[i]);
418			scalecolor(ctmp, emult);
419			setcolr(cscn[i], colval(ctmp,RED),
420			colval(ctmp,GRN), colval(ctmp,BLU));
421			}
422			addray(ro, rd, (double)zscn[i], cscn[i]);
423			}
424			}
425	gwlarson	3.11	/* write output and free beams */
426			hdflush(NULL);
427	gregl	3.1	/* clean up */
428	greg	3.15	free((void *)cscn);
429			free((void *)zscn);
430	gregl	3.1	fclose(pfp);
431			close(zfd);
432			}
433
434
435	greg	3.15	void
436	schorsch	3.22	eputs( /* put error message to stderr */
437	greg	3.31	char *s
438	schorsch	3.22	)
439	gregl	3.1	{
440			static int midline = 0;
441
442			if (!*s)
443			return;
444			if (!midline++) { /* prepend line with program name */
445			fputs(progname, stderr);
446			fputs(": ", stderr);
447			}
448			fputs(s, stderr);
449			if (s[strlen(s)-1] == '\n') {
450			fflush(stderr);
451			midline = 0;
452			}
453			}
454
455
456	greg	3.15	void
457	schorsch	3.22	quit( /* exit the program gracefully */
458			int code
459			)
460	gregl	3.1	{
461			hdsync(NULL, 1); /* write out any buffered data */
462			exit(code);
463			}