| 12 |
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#include "rhdisp.h" |
| 13 |
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#include "rhdriver.h" |
| 14 |
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|
| 15 |
< |
extern int *getviewcells(); |
| 15 |
> |
extern GCOORD *getviewcells(); |
| 16 |
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|
| 17 |
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typedef struct { |
| 18 |
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int hd; /* holodeck section number (-1 if inactive) */ |
| 39 |
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struct cellact { |
| 40 |
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short vi; /* voxel index */ |
| 41 |
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short add; /* zero means delete */ |
| 42 |
+ |
short rev; /* reverse ray direction? */ |
| 43 |
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}; /* action for cell */ |
| 44 |
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|
| 45 |
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struct beamact { |
| 275 |
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GCOORD gc[2]; |
| 276 |
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int bi, i; |
| 277 |
|
/* compute beam index */ |
| 278 |
< |
copystruct(gc, gcp); |
| 279 |
< |
copystruct(gc+1, &bp->gc); |
| 278 |
> |
if (bp->ca.rev) { |
| 279 |
> |
copystruct(gc, &bp->gc); |
| 280 |
> |
copystruct(gc+1, gcp); |
| 281 |
> |
} else { |
| 282 |
> |
copystruct(gc, gcp); |
| 283 |
> |
copystruct(gc+1, &bp->gc); |
| 284 |
> |
} |
| 285 |
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if ((bi = hdbindex(hdlist[voxel[bp->ca.vi].hd], gc)) <= 0) |
| 286 |
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error(CONSISTENCY, "bad grid coordinate in dobeam"); |
| 287 |
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if (bp->ca.add) { /* add it in */ |
| 341 |
|
struct cellact *cap; |
| 342 |
|
VIEW *vp; |
| 343 |
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{ |
| 344 |
+ |
int orient; |
| 345 |
|
FVECT org, dir[4]; |
| 346 |
|
/* compute view pyramid */ |
| 347 |
< |
if (vp->type == VT_PAR) goto viewerr; |
| 348 |
< |
if (viewray(org, dir[0], vp, 0., 0.) < -FTINY) goto viewerr; |
| 349 |
< |
if (viewray(org, dir[1], vp, 0., 1.) < -FTINY) goto viewerr; |
| 350 |
< |
if (viewray(org, dir[2], vp, 1., 1.) < -FTINY) goto viewerr; |
| 344 |
< |
if (viewray(org, dir[3], vp, 1., 0.) < -FTINY) goto viewerr; |
| 347 |
> |
orient = viewpyramid(org, dir, hdlist[voxel[cap->vi].hd], vp); |
| 348 |
> |
if (!orient) |
| 349 |
> |
error(INTERNAL, "unusable view in doview"); |
| 350 |
> |
cap->rev = orient < 0; |
| 351 |
|
/* visit cells within pyramid */ |
| 352 |
|
return(visit_cells(org, dir, hdlist[voxel[cap->vi].hd], docell, cap)); |
| 347 |
– |
viewerr: |
| 348 |
– |
error(INTERNAL, "unusable view in doview"); |
| 353 |
|
} |
| 354 |
|
|
| 355 |
|
|
| 358 |
|
VIEW *vold, *vnew; |
| 359 |
|
{ |
| 360 |
|
int netchange = 0; |
| 361 |
< |
int *ocl, *ncl; |
| 358 |
< |
struct cellact ca; |
| 361 |
> |
struct cellact oca, nca; |
| 362 |
|
int ocnt, ncnt; |
| 363 |
|
int c; |
| 364 |
|
register GCOORD *ogcp, *ngcp; |
| 365 |
|
/* get old and new cell lists */ |
| 366 |
< |
ocl = getviewcells(hdlist[voxel[voxi].hd], vold); |
| 367 |
< |
ncl = getviewcells(hdlist[voxel[voxi].hd], vnew); |
| 368 |
< |
if (ocl != NULL) { |
| 369 |
< |
ocnt = *ocl; ogcp = (GCOORD *)(ocl+1); |
| 370 |
< |
} else { |
| 371 |
< |
ocnt = 0; ogcp = NULL; |
| 372 |
< |
} |
| 373 |
< |
if (ncl != NULL) { |
| 374 |
< |
ncnt = *ncl; ngcp = (GCOORD *)(ncl+1); |
| 375 |
< |
} else { |
| 376 |
< |
ncnt = 0; ngcp = NULL; |
| 377 |
< |
} |
| 378 |
< |
ca.vi = voxi; /* add and delete cells */ |
| 379 |
< |
while (ocnt > 0 & ncnt > 0) |
| 380 |
< |
if ((c = cellcmp(ogcp, ngcp)) > 0) { |
| 381 |
< |
ca.add = 1; /* new cell */ |
| 382 |
< |
netchange += docell(ngcp++, &ca); |
| 383 |
< |
ncnt--; |
| 384 |
< |
} else if (c < 0) { |
| 385 |
< |
ca.add = 0; /* obsolete cell */ |
| 386 |
< |
netchange -= docell(ogcp++, &ca); |
| 387 |
< |
ocnt--; |
| 385 |
< |
} else { |
| 386 |
< |
ogcp++; ocnt--; /* unchanged cell */ |
| 387 |
< |
ngcp++; ncnt--; |
| 388 |
< |
} |
| 366 |
> |
ogcp = getviewcells(&ocnt, hdlist[voxel[voxi].hd], vold); |
| 367 |
> |
ngcp = getviewcells(&ncnt, hdlist[voxel[voxi].hd], vnew); |
| 368 |
> |
/* set up actions */ |
| 369 |
> |
oca.vi = nca.vi = voxi; |
| 370 |
> |
oca.rev = nca.rev = 0; |
| 371 |
> |
oca.add = 0; nca.add = 1; |
| 372 |
> |
if ((oca.rev = ocnt < 0)) |
| 373 |
> |
ocnt = -ocnt; |
| 374 |
> |
if ((nca.rev = ncnt < 0)) |
| 375 |
> |
ncnt = -ncnt; |
| 376 |
> |
if (nca.rev == oca.rev) /* add and delete cells in order */ |
| 377 |
> |
while (ocnt > 0 & ncnt > 0) |
| 378 |
> |
if ((c = cellcmp(ogcp, ngcp)) > 0) { /* new cell */ |
| 379 |
> |
netchange += docell(ngcp++, &nca); |
| 380 |
> |
ncnt--; |
| 381 |
> |
} else if (c < 0) { /* old cell */ |
| 382 |
> |
netchange -= docell(ogcp++, &oca); |
| 383 |
> |
ocnt--; |
| 384 |
> |
} else { /* same cell */ |
| 385 |
> |
ogcp++; ocnt--; |
| 386 |
> |
ngcp++; ncnt--; |
| 387 |
> |
} |
| 388 |
|
/* take care of list tails */ |
| 389 |
< |
for (ca.add = 1; ncnt > 0; ncnt--) |
| 390 |
< |
netchange += docell(ngcp++, &ca); |
| 391 |
< |
for (ca.add = 0; ocnt > 0; ocnt--) |
| 392 |
< |
netchange -= docell(ogcp++, &ca); |
| 389 |
> |
for ( ; ncnt > 0; ncnt--) |
| 390 |
> |
netchange += docell(ngcp++, &nca); |
| 391 |
> |
for ( ; ocnt > 0; ocnt--) |
| 392 |
> |
netchange -= docell(ogcp++, &oca); |
| 393 |
|
/* clean up */ |
| 394 |
< |
if (ocl != NULL) free((char *)ocl); |
| 395 |
< |
if (ncl != NULL) free((char *)ncl); |
| 394 |
> |
if (ogcp != NULL) free((char *)ogcp); |
| 395 |
> |
if (ngcp != NULL) free((char *)ngcp); |
| 396 |
|
return(netchange); |
| 397 |
|
} |
| 398 |
|
|
