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root/radiance/ray/src/hd/rhcopy.c
Revision: 3.6
Committed: Wed Jan 7 10:49:12 1998 UTC (26 years, 2 months ago) by gregl
Content type: text/plain
Branch: MAIN
Changes since 3.5: +2 -2 lines
Log Message:
fixed bug from sorting change (3.4

File Contents

# User Rev Content
1 gregl 3.1 /* Copyright (c) 1997 Silicon Graphics, Inc. */
2    
3     #ifndef lint
4     static char SCCSid[] = "$SunId$ SGI";
5     #endif
6    
7     /*
8     * Copy data into a holodeck file
9     */
10    
11     #include "holo.h"
12     #include "view.h"
13     #include "resolu.h"
14    
15 gregl 3.5 int checkdepth = 1; /* check depth (!-f option)? */
16     int checkrepeats = 0; /* check for repeats (-c option)? */
17 gregl 3.1 int frompicz; /* input from pictures & depth-buffers? */
18     int noutsects; /* number of output sections */
19 gregl 3.2 char obstr, unobstr; /* flag pointer values */
20 gregl 3.1
21     char *progname; /* global argv[0] */
22    
23    
24     main(argc, argv)
25     int argc;
26     char *argv[];
27     {
28     int i;
29    
30     progname = argv[0];
31 gregl 3.5 frompicz = -1;
32     for (i = 2; i < argc && argv[i][0] == '-'; i++)
33     switch (argv[i][1]) {
34     case 'c':
35     checkrepeats = 1;
36     break;
37     case 'f':
38     checkdepth = 0;
39     break;
40     case 'h':
41     frompicz = 0;
42     break;
43     case 'p':
44     frompicz = 1;
45     break;
46     default:
47     goto userr;
48     }
49     if (i >= argc || frompicz < 0)
50 gregl 3.1 goto userr;
51 gregl 3.5 if (frompicz && (argc-i)%2)
52 gregl 3.1 goto userr;
53     noutsects = openholo(argv[1], 1);
54     if (frompicz)
55 gregl 3.5 for ( ; i < argc; i += 2)
56 gregl 3.1 addpicz(argv[i], argv[i+1]);
57     else
58 gregl 3.5 for ( ; i < argc; i++)
59 gregl 3.1 addholo(argv[i]);
60     quit(0);
61     userr:
62 gregl 3.5 fprintf(stderr, "Usage: %s output.hdk [-c][-f] -h inp1.hdk ..\n",
63 gregl 3.1 progname);
64 gregl 3.5 fprintf(stderr, " Or: %s output.hdk [-c][-f] -pz inp1.pic inp1.zbf ..\n",
65     progname);
66 gregl 3.1 exit(1);
67     }
68    
69    
70 gregl 3.2 #define H_BADF 01
71     #define H_OBST 02
72     #define H_OBSF 04
73    
74     holheadline(s, hf) /* check holodeck header line */
75 gregl 3.1 register char *s;
76 gregl 3.2 int *hf;
77 gregl 3.1 {
78     char fmt[32];
79    
80     if (formatval(fmt, s)) {
81 gregl 3.2 if (strcmp(fmt, HOLOFMT))
82     *hf |= H_BADF;
83     else
84     *hf &= ~H_BADF;
85 gregl 3.1 return;
86     }
87     if (!strncmp(s, "OBSTRUCTIONS=", 13)) {
88     s += 13;
89     while (*s == ' ') s++;
90     if (*s == 't' | *s == 'T')
91 gregl 3.2 *hf |= H_OBST;
92 gregl 3.1 else if (*s == 'f' | *s == 'F')
93 gregl 3.2 *hf |= H_OBSF;
94 gregl 3.1 else
95     error(WARNING, "bad OBSTRUCTIONS value in holodeck");
96     return;
97     }
98     }
99    
100     int
101     openholo(fname, append) /* open existing holodeck file for i/o */
102     char *fname;
103     int append;
104     {
105     extern long ftell();
106     FILE *fp;
107     int fd;
108 gregl 3.2 int hflags = 0;
109 gregl 3.3 long nextloc;
110 gregl 3.1 int n;
111     /* open holodeck file */
112     if ((fp = fopen(fname, append ? "r+" : "r")) == NULL) {
113     sprintf(errmsg, "cannot open \"%s\" for %s", fname,
114     append ? "appending" : "reading");
115     error(SYSTEM, errmsg);
116     }
117     /* check header and magic number */
118 gregl 3.2 if (getheader(fp, holheadline, &hflags) < 0 ||
119     hflags&H_BADF || getw(fp) != HOLOMAGIC) {
120 gregl 3.1 sprintf(errmsg, "file \"%s\" not in holodeck format", fname);
121     error(USER, errmsg);
122     }
123     fd = dup(fileno(fp)); /* dup file handle */
124     nextloc = ftell(fp); /* get stdio position */
125     fclose(fp); /* done with stdio */
126     for (n = 0; nextloc > 0L; n++) { /* initialize each section */
127 gregl 3.3 lseek(fd, nextloc, 0);
128 gregl 3.1 read(fd, (char *)&nextloc, sizeof(nextloc));
129 gregl 3.2 hdinit(fd, NULL)->priv = hflags&H_OBST ? &obstr :
130     hflags&H_OBSF ? &unobstr : (char *)NULL;
131 gregl 3.1 }
132     return(n);
133     }
134    
135 gregl 3.2 #undef H_BADF
136     #undef H_OBST
137     #undef H_OBSF
138 gregl 3.1
139 gregl 3.2
140 gregl 3.1 addray(ro, rd, d, cv) /* add a ray to our output holodeck */
141     FVECT ro, rd;
142     double d;
143     COLR cv;
144     {
145 gregl 3.5 int sn, bi, n;
146 gregl 3.1 register HOLO *hp;
147     GCOORD gc[2];
148     BYTE rr[2][2];
149 gregl 3.5 BEAM *bp;
150 gregl 3.1 double d0, d1;
151 gregl 3.5 unsigned dc;
152 gregl 3.1 register RAYVAL *rv;
153     /* check each output section */
154     for (sn = noutsects; sn--; ) {
155     hp = hdlist[sn];
156     d0 = hdinter(gc, rr, &d1, hp, ro, rd);
157     if (d <= d0 || d1 < -0.001)
158     continue; /* missed section */
159 gregl 3.5 if (checkdepth) { /* check depth */
160     if (hp->priv == &obstr && d0 < -0.001)
161     continue; /* ray starts too late */
162     if (hp->priv == &unobstr && d < 0.999*d1)
163     continue; /* ray ends too soon */
164     }
165     dc = hdcode(hp, d-d0);
166     bi = hdbindex(hp, gc); /* check for duplicates */
167     if (checkrepeats && (bp = hdgetbeam(hp, bi)) != NULL) {
168     for (n = bp->nrm, rv = hdbray(bp); n--; rv++)
169     if (rv->d == dc &&
170     rv->r[0][0] == rr[0][0] &&
171     rv->r[0][1] == rr[0][1] &&
172     rv->r[1][0] == rr[1][0] &&
173     rv->r[1][1] == rr[1][1])
174     break;
175     if (n >= 0)
176     continue; /* found a matching ray */
177     }
178     rv = hdnewrays(hp, bi, 1);
179     rv->d = dc;
180 gregl 3.1 rv->r[0][0] = rr[0][0]; rv->r[0][1] = rr[0][1];
181     rv->r[1][0] = rr[1][0]; rv->r[1][1] = rr[1][1];
182     copycolr(rv->v, cv);
183     }
184     }
185    
186    
187     addholo(hdf) /* add a holodeck file */
188     char *hdf;
189     {
190     int fd;
191     register HOLO *hp;
192     register BEAM *bp;
193 gregl 3.4 register HDBEAMI *hbl;
194 gregl 3.1 GCOORD gc[2];
195     FVECT ro, rd;
196     double d;
197     int i, j;
198     register int k;
199 gregl 3.4 /* open the holodeck for reading */
200     openholo(hdf, 0);
201 gregl 3.1 fd = hdlist[noutsects]->fd; /* remember the file handle */
202     while ((hp = hdlist[noutsects]) != NULL) { /* load each section */
203 gregl 3.4 hbl = (HDBEAMI *)malloc(nbeams(hp)*sizeof(HDBEAMI));
204     if (hbl == NULL)
205     error(SYSTEM, "out of memory in addholo");
206 gregl 3.6 for (j = nbeams(hp); j--; ) { /* sort the beams */
207 gregl 3.4 hbl[j].h = hp;
208 gregl 3.6 hbl[j].b = j+1;
209 gregl 3.4 }
210     qsort((char *)hbl, nbeams(hp), sizeof(HDBEAMI), hdfilord);
211     for (j = 0; j < nbeams(hp); j++) /* load each beam */
212     if ((bp = hdgetbeam(hp, hbl[j].b)) != NULL) {
213     hdbcoord(gc, hp, hbl[j].b);
214 gregl 3.1 for (k = bp->nrm; k--; ) {
215 gregl 3.2 d = hdray(ro, rd,
216     hp, gc, hdbray(bp)[k].r);
217     if (hp->priv == &unobstr)
218     VSUM(ro, ro, rd, d);
219     else
220     d = 0.;
221     d = hddepth(hp, hdbray(bp)[k].d) - d;
222 gregl 3.1 addray(ro, rd, d, hdbray(bp)[k].v);
223     }
224 gregl 3.4 hdfreebeam(hp, hbl[j].b); /* free beam */
225 gregl 3.1 }
226 gregl 3.4 free((char *)hbl); /* free beam list */
227 gregl 3.1 hddone(hp); /* free the section */
228     }
229     close(fd); /* close the file */
230     }
231    
232    
233     struct phead {
234     VIEW vw;
235     double expos;
236     short gotview;
237     short badfmt;
238     short altprims;
239     };
240    
241    
242     picheadline(s, ph) /* process picture header line */
243     char *s;
244     struct phead *ph;
245     {
246     char fmt[32];
247    
248     if (formatval(fmt, s)) {
249     ph->badfmt = strcmp(fmt, COLRFMT);
250     return;
251     }
252     if (isprims(s)) {
253     ph->altprims++; /* don't want to deal with this */
254     return;
255     }
256     if (isexpos(s)) {
257     ph->expos *= exposval(s);
258     return;
259     }
260     if (isview(s)) {
261     ph->gotview += sscanview(&ph->vw, s);
262     return;
263     }
264     }
265    
266    
267     addpicz(pcf, zbf) /* add a picture + depth-buffer */
268     char *pcf, *zbf;
269     {
270     FILE *pfp;
271     int zfd;
272     COLR *cscn;
273     float *zscn;
274     struct phead phd;
275     int eshft;
276     double emult;
277     RESOLU prs;
278     FLOAT vl[2];
279     FVECT ro, rd;
280     double aftd;
281     COLOR ctmp;
282     int j;
283     register int i;
284     /* open files */
285     if ((pfp = fopen(pcf, "r")) == NULL) {
286     sprintf(errmsg, "cannot open picture file \"%s\"", pcf);
287     error(SYSTEM, pcf);
288     }
289     if ((zfd = open(zbf, O_RDONLY)) < 0) {
290     sprintf(errmsg, "cannot open depth file \"%s\"", zbf);
291     error(SYSTEM, pcf);
292     }
293     /* load picture header */
294     copystruct(&phd.vw, &stdview);
295     phd.expos = 1.0;
296     phd.badfmt = phd.gotview = phd.altprims = 0;
297     if (getheader(pfp, picheadline, &phd) < 0 ||
298     phd.badfmt || !fgetsresolu(&prs, pfp)) {
299     sprintf(errmsg, "bad format for picture file \"%s\"", pcf);
300     error(USER, errmsg);
301     }
302     if (!phd.gotview || setview(&phd.vw) != NULL) {
303     sprintf(errmsg, "missing/illegal view in picture \"%s\"",
304     pcf);
305     error(USER, errmsg);
306     }
307     if (phd.altprims) {
308     sprintf(errmsg, "ignoring primary values in picture \"%s\"",
309     pcf);
310     error(WARNING, errmsg);
311     }
312     /* figure out what to do about exposure */
313     if (phd.expos < 0.99 | phd.expos > 1.01) {
314     emult = -log(phd.expos)/log(2.);
315     eshft = emult >= 0. ? emult+.5 : emult-.5;
316     emult -= (double)eshft;
317     if (emult <= 0.01 & emult >= -0.01)
318     emult = -1.;
319     else {
320     emult = 1./phd.expos;
321     eshft = 0;
322     }
323     } else {
324     emult = -1.;
325     eshft = 0;
326     }
327     /* allocate buffers */
328     cscn = (COLR *)malloc(scanlen(&prs)*sizeof(COLR));
329     zscn = (float *)malloc(scanlen(&prs)*sizeof(float));
330     if (cscn == NULL | zscn == NULL)
331     error(SYSTEM, "out of memory in addpicz");
332     /* read and process each scanline */
333     for (j = 0; j < numscans(&prs); j++) {
334     i = scanlen(&prs); /* read colrs */
335     if (freadcolrs(cscn, i, pfp) < 0) {
336     sprintf(errmsg, "error reading picture \"%s\"", pcf);
337     error(USER, errmsg);
338     }
339     if (eshft) /* shift exposure */
340     shiftcolrs(cscn, i, eshft);
341     i *= sizeof(float); /* read depth */
342     if (read(zfd, (char *)zscn, i) != i) {
343     sprintf(errmsg, "error reading depth file \"%s\"", zbf);
344     error(USER, errmsg);
345     }
346     for (i = scanlen(&prs); i--; ) { /* do each pixel */
347     pix2loc(vl, &prs, i, j);
348     aftd = viewray(ro, rd, &phd.vw, vl[0], vl[1]);
349     if (aftd < -FTINY)
350     continue; /* off view */
351     if (aftd > FTINY && zscn[i] > aftd)
352     continue; /* aft clipped */
353     if (emult > 0.) { /* whatta pain */
354     colr_color(ctmp, cscn[i]);
355     scalecolor(ctmp, emult);
356     setcolr(cscn[i], colval(ctmp,RED),
357     colval(ctmp,GRN), colval(ctmp,BLU));
358     }
359     addray(ro, rd, (double)zscn[i], cscn[i]);
360     }
361     }
362     /* clean up */
363     free((char *)cscn);
364     free((char *)zscn);
365     fclose(pfp);
366     close(zfd);
367     }
368    
369    
370     eputs(s) /* put error message to stderr */
371     register char *s;
372     {
373     static int midline = 0;
374    
375     if (!*s)
376     return;
377     if (!midline++) { /* prepend line with program name */
378     fputs(progname, stderr);
379     fputs(": ", stderr);
380     }
381     fputs(s, stderr);
382     if (s[strlen(s)-1] == '\n') {
383     fflush(stderr);
384     midline = 0;
385     }
386     }
387    
388    
389     quit(code) /* exit the program gracefully */
390     int code;
391     {
392     hdsync(NULL, 1); /* write out any buffered data */
393     exit(code);
394     }