18 |
|
|
19 |
|
#define MAXVOXEL 16 /* maximum number of active voxels */ |
20 |
|
|
21 |
– |
extern GCOORD *getviewcells(); |
22 |
– |
|
23 |
– |
static VIEW dvw; /* current view corresponding to beam list */ |
24 |
– |
|
21 |
|
typedef struct { |
22 |
|
int hd; /* holodeck section number (-1 if inactive) */ |
23 |
|
int i[3]; /* voxel index (may be outside section) */ |
28 |
|
#define CBEAMBLK 1024 /* cbeam allocation block size */ |
29 |
|
|
30 |
|
static struct beamcomp { |
31 |
< |
unsigned short wants; /* flags telling which voxels want us */ |
32 |
< |
unsigned short hd; /* holodeck section number */ |
33 |
< |
int bi; /* beam index */ |
31 |
> |
unsigned int2 wants; /* flags telling which voxels want us */ |
32 |
> |
unsigned int2 hd; /* holodeck section number */ |
33 |
> |
int4 bi; /* beam index */ |
34 |
> |
int4 nr; /* number of samples desired */ |
35 |
|
} *cbeam = NULL; /* current beam list */ |
36 |
|
|
37 |
|
static int ncbeams = 0; /* number of sorted beams in cbeam */ |
42 |
|
short vi; /* voxel index */ |
43 |
|
short add; /* zero means delete */ |
44 |
|
short rev; /* reverse ray direction? */ |
45 |
+ |
VIEW *vp; /* view for image */ |
46 |
+ |
short hr, vr; /* image resolution */ |
47 |
|
}; /* action for cell */ |
48 |
|
|
49 |
|
struct beamact { |
109 |
|
|
110 |
|
if (ncbeams <= 0) |
111 |
|
return(-1); |
112 |
< |
cb.wants = 0; cb.hd = hd; cb.bi = bi; |
112 |
> |
cb.wants = 0; cb.hd = hd; cb.bi = bi; cb.nr = 0; |
113 |
|
p = (struct beamcomp *)bsearch((char *)&cb, (char *)cbeam, ncbeams, |
114 |
|
sizeof(struct beamcomp), cbeamcmp); |
115 |
|
if (p == NULL) |
137 |
|
if (bi < 1 | bi > nbeams(hdlist[hd])) |
138 |
|
error(INTERNAL, "illegal beam index in getcbeam"); |
139 |
|
n = newcbeam(); /* allocate and assign */ |
140 |
< |
cbeam[n].wants = 0; cbeam[n].hd = hd; cbeam[n].bi = bi; |
140 |
> |
cbeam[n].wants = cbeam[n].nr = 0; cbeam[n].hd = hd; cbeam[n].bi = bi; |
141 |
|
return(n); |
142 |
|
} |
143 |
|
|
162 |
|
} |
163 |
|
|
164 |
|
|
165 |
< |
cbeamop(op, bl, n, v, hr, vr) /* update beams on server list */ |
165 |
> |
cbeamop(op, bl, n) /* update beams on server list */ |
166 |
|
int op; |
167 |
|
register struct beamcomp *bl; |
168 |
|
int n; |
170 |
– |
VIEW *v; |
171 |
– |
int hr, vr; |
169 |
|
{ |
170 |
|
register PACKHEAD *pa; |
171 |
|
register int i; |
174 |
|
return; |
175 |
|
pa = (PACKHEAD *)malloc(n*sizeof(PACKHEAD)); |
176 |
|
if (pa == NULL) |
177 |
< |
error(SYSTEM, "out of memory in cbeamadd"); |
177 |
> |
error(SYSTEM, "out of memory in cbeamop"); |
178 |
|
for (i = 0; i < n; i++) { |
179 |
|
pa[i].hd = bl[i].hd; |
180 |
|
pa[i].bi = bl[i].bi; |
181 |
< |
pa[i].nr = v==NULL ? 0 : |
185 |
< |
npixels(v, hr, vr, hdlist[bl[i].hd], bl[i].bi); |
181 |
> |
pa[i].nr = bl[i].nr; |
182 |
|
pa[i].nc = 0; |
183 |
|
} |
184 |
|
serv_request(op, n*sizeof(PACKHEAD), (char *)pa); |
186 |
|
} |
187 |
|
|
188 |
|
|
189 |
< |
int |
194 |
< |
set_voxels(vl, n) /* set new voxel array */ |
195 |
< |
VOXL vl[MAXVOXEL]; |
196 |
< |
int n; |
197 |
< |
{ |
198 |
< |
short wmap[256]; |
199 |
< |
int vmap[MAXVOXEL]; |
200 |
< |
int comn = 0; |
201 |
< |
int no; |
202 |
< |
register int i, j; |
203 |
< |
/* find common voxels */ |
204 |
< |
for (j = 0; j < MAXVOXEL && voxel[j].hd >= 0; j++) { |
205 |
< |
vmap[j] = -1; |
206 |
< |
for (i = n; i--; ) |
207 |
< |
if (!bcmp((char *)(vl+i), (char *)(voxel+j), |
208 |
< |
sizeof(VOXL))) { |
209 |
< |
vmap[j] = i; |
210 |
< |
comn |= 1<<i; |
211 |
< |
break; |
212 |
< |
} |
213 |
< |
} |
214 |
< |
no = comn ? j : 0; /* compute flag mapping */ |
215 |
< |
for (i = 256; i--; ) { |
216 |
< |
wmap[i] = 0; |
217 |
< |
for (j = no; j--; ) |
218 |
< |
if (vmap[j] >= 0 && i & 1<<j) |
219 |
< |
wmap[i] |= 1<<vmap[j]; |
220 |
< |
} |
221 |
< |
/* fix cbeam flags */ |
222 |
< |
for (i = ncbeams; i--; ) |
223 |
< |
cbeam[i].wants = wmap[cbeam[i].wants]; |
224 |
< |
/* update our voxel list */ |
225 |
< |
bcopy((char *)vl, (char *)voxel, n*sizeof(VOXL)); |
226 |
< |
if (n < MAXVOXEL) |
227 |
< |
voxel[n].hd = -1; |
228 |
< |
return(comn); /* return bit array of common voxels */ |
229 |
< |
} |
230 |
< |
|
231 |
< |
|
232 |
< |
int |
233 |
< |
get_voxels(vl, vp) /* find voxels corresponding to view point */ |
234 |
< |
VOXL vl[MAXVOXEL]; |
189 |
> |
add_voxels(vp) /* add voxels corresponding to view point */ |
190 |
|
FVECT vp; |
191 |
|
{ |
192 |
< |
int first, n; |
192 |
> |
int first, n, rfl = 0; |
193 |
|
FVECT gp; |
194 |
|
double d; |
195 |
|
int dist, bestd = 0x7fff; |
196 |
|
VOXL vox; |
197 |
|
register int i, j, k; |
198 |
|
/* count voxels in list already */ |
199 |
< |
for (first = 0; first < MAXVOXEL && vl[first].hd >= 0; first++) |
199 |
> |
for (first = 0; first < MAXVOXEL && voxel[first].hd >= 0; first++) |
200 |
|
; |
201 |
|
/* find closest voxels */ |
202 |
|
for (n = first, i = 0; n < MAXVOXEL && hdlist[i]; i++) { |
216 |
|
if (dist < bestd) { /* start closer list */ |
217 |
|
n = first; |
218 |
|
bestd = dist; |
219 |
+ |
rfl = 0; |
220 |
|
} |
221 |
|
/* check if already in list */ |
222 |
|
for (k = first; k--; ) |
223 |
< |
if (vl[k].hd == i && |
224 |
< |
vl[k].i[0] == vox.i[0] && |
225 |
< |
vl[k].i[1] == vox.i[1] && |
226 |
< |
vl[k].i[2] == vox.i[2]) |
223 |
> |
if (voxel[k].hd == i && |
224 |
> |
voxel[k].i[0] == vox.i[0] && |
225 |
> |
voxel[k].i[1] == vox.i[1] && |
226 |
> |
voxel[k].i[2] == vox.i[2]) |
227 |
|
break; |
228 |
< |
if (k >= 0) |
228 |
> |
if (k >= 0) { |
229 |
> |
rfl |= 1<<k; |
230 |
|
continue; |
231 |
+ |
} |
232 |
|
vox.hd = i; /* add this voxel */ |
233 |
< |
copystruct(&vl[n], &vox); |
234 |
< |
n++; |
233 |
> |
copystruct(&voxel[n], &vox); |
234 |
> |
rfl |= 1<<n++; |
235 |
|
} |
236 |
|
} |
237 |
|
/* check for really stupid move */ |
240 |
|
return(0); |
241 |
|
} |
242 |
|
if (n < MAXVOXEL) |
243 |
< |
vl[n].hd = -1; |
244 |
< |
return(n); |
243 |
> |
voxel[n].hd = -1; |
244 |
> |
return(rfl); |
245 |
|
} |
246 |
|
|
247 |
|
|
251 |
|
register struct beamact *bp; |
252 |
|
{ |
253 |
|
GCOORD gc[2]; |
254 |
< |
int bi, i; |
254 |
> |
int bi, i, n; |
255 |
|
/* compute beam index */ |
256 |
|
if (bp->ca.rev) { |
257 |
|
copystruct(gc, &bp->gc); |
265 |
|
if (bp->ca.add) { /* add it in */ |
266 |
|
i = getcbeam(voxel[bp->ca.vi].hd, bi); |
267 |
|
cbeam[i].wants |= 1<<bp->ca.vi; /* say we want it */ |
268 |
+ |
n = npixels(bp->ca.vp, bp->ca.hr, bp->ca.vr, |
269 |
+ |
hdlist[cbeam[i].hd], cbeam[i].bi); |
270 |
+ |
if (n > cbeam[i].nr) |
271 |
+ |
cbeam[i].nr = n; |
272 |
|
return(i == ncbeams+xcbeams-1); /* return 1 if totally new */ |
273 |
|
} |
274 |
|
/* else delete it */ |
275 |
|
i = findcbeam(voxel[bp->ca.vi].hd, bi); |
276 |
|
if (i >= 0 && cbeam[i].wants & 1<<bp->ca.vi) { |
277 |
|
cbeam[i].wants &= ~(1<<bp->ca.vi); /* we don't want it */ |
278 |
+ |
if (!cbeam[i].wants) |
279 |
+ |
cbeam[i].nr = 0; |
280 |
|
return(1); /* indicate change */ |
281 |
|
} |
282 |
|
return(0); |
346 |
|
|
347 |
|
|
348 |
|
int |
349 |
< |
doview(cap, vp) /* visit cells for a given view */ |
349 |
> |
doview(cap) /* visit cells for a given view */ |
350 |
|
struct cellact *cap; |
387 |
– |
VIEW *vp; |
351 |
|
{ |
352 |
|
int orient; |
353 |
|
FVECT org, dir[4]; |
354 |
|
/* compute view pyramid */ |
355 |
< |
orient = viewpyramid(org, dir, hdlist[voxel[cap->vi].hd], vp); |
355 |
> |
orient = viewpyramid(org, dir, hdlist[voxel[cap->vi].hd], cap->vp); |
356 |
|
if (!orient) |
357 |
|
error(INTERNAL, "unusable view in doview"); |
358 |
|
cap->rev = orient < 0; |
361 |
|
} |
362 |
|
|
363 |
|
|
364 |
< |
mvview(voxi, vold, vnew) /* move view for a voxel */ |
402 |
< |
int voxi; |
403 |
< |
VIEW *vold, *vnew; |
364 |
> |
beam_init() /* clear beam list for new view(s) */ |
365 |
|
{ |
366 |
< |
int netchange = 0; |
367 |
< |
struct cellact oca, nca; |
368 |
< |
int ocnt, ncnt; |
369 |
< |
int nmatch = 0; |
370 |
< |
GCOORD *ogcl, *ngcl; |
410 |
< |
register int c; |
411 |
< |
register GCOORD *ogcp, *ngcp; |
412 |
< |
/* get old and new cell lists */ |
413 |
< |
ogcp = ogcl = getviewcells(&ocnt, hdlist[voxel[voxi].hd], vold); |
414 |
< |
ngcp = ngcl = getviewcells(&ncnt, hdlist[voxel[voxi].hd], vnew); |
415 |
< |
/* set up actions */ |
416 |
< |
oca.vi = nca.vi = voxi; |
417 |
< |
oca.add = 0; nca.add = 1; |
418 |
< |
if ((oca.rev = ocnt < 0)) |
419 |
< |
ocnt = -ocnt; |
420 |
< |
if ((nca.rev = ncnt < 0)) |
421 |
< |
ncnt = -ncnt; |
422 |
< |
if (oca.rev == nca.rev) { /* count matches */ |
423 |
< |
int oc = ocnt, nc = ncnt; |
424 |
< |
while (oc > 0 & nc > 0) { |
425 |
< |
c = cellcmp(ogcp, ngcp); |
426 |
< |
if (c >= 0) { ngcp++; nc--; } |
427 |
< |
if (c <= 0) { ogcp++; oc--; } |
428 |
< |
nmatch += c==0; |
429 |
< |
} |
430 |
< |
ogcp = ogcl; ngcp = ngcl; |
431 |
< |
} |
432 |
< |
if (nmatch < ocnt>>1) { /* faster to just delete old cells? */ |
433 |
< |
for (c = ncbeams; c--; ) |
434 |
< |
if (cbeam[c].wants & 1<<voxi) { |
435 |
< |
cbeam[c].wants &= ~(1<<voxi); |
436 |
< |
netchange--; |
437 |
< |
} |
438 |
< |
free((char *)ogcl); |
439 |
< |
ogcl = NULL; ocnt = 0; |
440 |
< |
} |
441 |
< |
/* add and delete cells in order */ |
442 |
< |
while (ocnt > 0 & ncnt > 0) |
443 |
< |
if ((c = cellcmp(ogcp, ngcp)) > 0) { /* new cell */ |
444 |
< |
netchange += docell(ngcp++, &nca); |
445 |
< |
ncnt--; |
446 |
< |
} else if (c < 0) { /* old cell */ |
447 |
< |
netchange -= docell(ogcp++, &oca); |
448 |
< |
ocnt--; |
449 |
< |
} else { /* same cell */ |
450 |
< |
ogcp++; ocnt--; |
451 |
< |
ngcp++; ncnt--; |
452 |
< |
} |
453 |
< |
/* take care of list tails */ |
454 |
< |
for ( ; ncnt > 0; ncnt--) |
455 |
< |
netchange += docell(ngcp++, &nca); |
456 |
< |
for ( ; ocnt > 0; ocnt--) |
457 |
< |
netchange -= docell(ogcp++, &oca); |
458 |
< |
/* clean up */ |
459 |
< |
if (ogcl != NULL) free((char *)ogcl); |
460 |
< |
if (ngcl != NULL) free((char *)ngcl); |
461 |
< |
return(netchange); |
366 |
> |
register int i; |
367 |
> |
/* clear desire flags */ |
368 |
> |
for (i = ncbeams+xcbeams; i--; ) |
369 |
> |
cbeam[i].wants = cbeam[i].nr = 0; |
370 |
> |
voxel[0].hd = -1; /* clear voxel list */ |
371 |
|
} |
372 |
|
|
373 |
|
|
374 |
< |
int |
466 |
< |
beam_sync() /* synchronize beams on server */ |
467 |
< |
{ |
468 |
< |
cbeamop(DR_NEWSET, cbeam, ncbeams, &odev.v, odev.hres, odev.vres); |
469 |
< |
return(ncbeams); |
470 |
< |
} |
471 |
< |
|
472 |
< |
|
473 |
< |
beam_view(vn) /* change beam view (if advisable) */ |
374 |
> |
beam_view(vn, hr, vr) /* add beam view (if advisable) */ |
375 |
|
VIEW *vn; |
376 |
+ |
int hr, vr; |
377 |
|
{ |
378 |
|
struct cellact ca; |
379 |
< |
VOXL vlnew[MAXVOXEL]; |
380 |
< |
int n, comn; |
381 |
< |
|
382 |
< |
if (vn == NULL || !vn->type) { /* clear our beam list */ |
383 |
< |
set_voxels(vlnew, 0); |
384 |
< |
cbeamop(DR_DELSET, cbeam, ncbeams, NULL, 0, 0); |
483 |
< |
ncbeams = 0; |
484 |
< |
dvw.type = 0; |
485 |
< |
return(1); |
486 |
< |
} |
487 |
< |
/* find our new voxels */ |
488 |
< |
n = get_voxels(vlnew, vn->vp); |
489 |
< |
if (dvw.type && !n) { |
490 |
< |
copystruct(vn, &dvw); /* cancel move */ |
379 |
> |
int vfl; |
380 |
> |
/* sort our list */ |
381 |
> |
cbeamsort(1); |
382 |
> |
/* add new voxels */ |
383 |
> |
vfl = add_voxels(vn->vp); |
384 |
> |
if (!vfl) |
385 |
|
return(0); |
386 |
< |
} |
493 |
< |
/* set the new voxels */ |
494 |
< |
comn = set_voxels(vlnew, n); |
495 |
< |
if (!dvw.type) |
496 |
< |
comn = 0; |
386 |
> |
ca.vp = vn; ca.hr = hr; ca.vr = vr; |
387 |
|
ca.add = 1; /* update our beam list */ |
388 |
< |
for (ca.vi = n; ca.vi--; ) |
389 |
< |
if (comn & 1<<ca.vi) /* change which cells we see */ |
390 |
< |
mvview(ca.vi, &dvw, vn); |
391 |
< |
else /* else add all new cells */ |
392 |
< |
doview(&ca, vn); |
393 |
< |
/* inform server of new beams */ |
394 |
< |
cbeamop(DR_ADDSET, cbeam+ncbeams, xcbeams, vn, odev.hres, odev.vres); |
388 |
> |
for (ca.vi = 0; vfl; vfl >>= 1, ca.vi++) |
389 |
> |
if (vfl & 1) |
390 |
> |
doview(&ca); |
391 |
> |
return(1); |
392 |
> |
} |
393 |
> |
|
394 |
> |
|
395 |
> |
int |
396 |
> |
beam_sync(all) /* update beam list on server */ |
397 |
> |
int all; |
398 |
> |
{ |
399 |
|
/* sort list to put orphans at end */ |
400 |
|
cbeamsort(0); |
401 |
< |
/* tell server to delete orphans */ |
402 |
< |
cbeamop(DR_DELSET, cbeam+ncbeams, xcbeams, NULL, 0, 0); |
401 |
> |
if (all) |
402 |
> |
cbeamop(DR_NEWSET, cbeam, ncbeams); |
403 |
> |
else |
404 |
> |
cbeamop(DR_ADJSET, cbeam, ncbeams+xcbeams); |
405 |
|
xcbeams = 0; /* truncate our list */ |
406 |
< |
copystruct(&dvw, vn); /* record new view */ |
511 |
< |
return(1); |
406 |
> |
return(ncbeams); |
407 |
|
} |