| 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 |
gregl |
3.2 |
* Holodeck beam tracking for display process |
| 9 |
gregl |
3.1 |
*/ |
| 10 |
|
|
|
| 11 |
|
|
#include "rholo.h" |
| 12 |
|
|
#include "rhdisp.h" |
| 13 |
|
|
#include "rhdriver.h" |
| 14 |
|
|
|
| 15 |
|
|
extern int *getviewcells(); |
| 16 |
|
|
|
| 17 |
|
|
typedef struct { |
| 18 |
gregl |
3.2 |
int hd; /* holodeck section number (-1 if inactive) */ |
| 19 |
gregl |
3.1 |
int i[3]; /* voxel index (may be outside section) */ |
| 20 |
|
|
} VOXL; /* a voxel */ |
| 21 |
|
|
|
| 22 |
|
|
static VOXL voxel[8] = { /* current voxel list */ |
| 23 |
|
|
{-1}, {-1}, {-1}, {-1}, |
| 24 |
|
|
{-1}, {-1}, {-1}, {-1} |
| 25 |
|
|
}; |
| 26 |
|
|
|
| 27 |
|
|
#define CBEAMBLK 1024 /* cbeam allocation block size */ |
| 28 |
|
|
|
| 29 |
|
|
static struct beamcomp { |
| 30 |
|
|
short wants; /* flags telling which voxels want us */ |
| 31 |
|
|
short hd; /* holodeck section number */ |
| 32 |
|
|
int bi; /* beam index */ |
| 33 |
|
|
} *cbeam = NULL; /* current beam list */ |
| 34 |
|
|
|
| 35 |
|
|
static int ncbeams = 0; /* number of sorted beams in cbeam */ |
| 36 |
|
|
static int xcbeams = 0; /* extra (unregistered) beams past ncbeams */ |
| 37 |
|
|
static int maxcbeam = 0; /* size of cbeam array */ |
| 38 |
|
|
|
| 39 |
|
|
struct cellact { |
| 40 |
|
|
short vi; /* voxel index */ |
| 41 |
|
|
short add; /* zero means delete */ |
| 42 |
|
|
}; /* action for cell */ |
| 43 |
|
|
|
| 44 |
|
|
struct beamact { |
| 45 |
|
|
struct cellact ca; /* cell action */ |
| 46 |
|
|
GCOORD gc; /* grid coordinate */ |
| 47 |
|
|
}; /* beam origin and action */ |
| 48 |
|
|
|
| 49 |
|
|
|
| 50 |
|
|
int |
| 51 |
|
|
newcbeam() /* allocate new entry at end of cbeam array */ |
| 52 |
|
|
{ |
| 53 |
|
|
int i; |
| 54 |
|
|
|
| 55 |
|
|
if ((i = ncbeams + xcbeams++) >= maxcbeam) { /* grow array */ |
| 56 |
|
|
maxcbeam += CBEAMBLK; |
| 57 |
|
|
if (cbeam == NULL) |
| 58 |
|
|
cbeam = (struct beamcomp *)malloc( |
| 59 |
|
|
maxcbeam*sizeof(struct beamcomp) ); |
| 60 |
|
|
else |
| 61 |
|
|
cbeam = (struct beamcomp *)realloc( (char *)cbeam, |
| 62 |
|
|
maxcbeam*sizeof(struct beamcomp) ); |
| 63 |
|
|
if (cbeam == NULL) |
| 64 |
|
|
error(SYSTEM, "out of memory in newcbeam"); |
| 65 |
|
|
} |
| 66 |
|
|
return(i); |
| 67 |
|
|
} |
| 68 |
|
|
|
| 69 |
|
|
|
| 70 |
|
|
int |
| 71 |
|
|
cbeamcmp(cb1, cb2) /* compare two cbeam entries for sort: keep orphans */ |
| 72 |
|
|
register struct beamcomp *cb1, *cb2; |
| 73 |
|
|
{ |
| 74 |
|
|
register int c; |
| 75 |
|
|
|
| 76 |
|
|
if ((c = cb1->bi - cb2->bi)) /* sort on beam index first */ |
| 77 |
|
|
return(c); |
| 78 |
|
|
return(cb1->hd - cb2->hd); /* use hd to resolve matches */ |
| 79 |
|
|
} |
| 80 |
|
|
|
| 81 |
|
|
|
| 82 |
|
|
int |
| 83 |
|
|
cbeamcmp2(cb1, cb2) /* compare two cbeam entries for sort: no orphans */ |
| 84 |
|
|
register struct beamcomp *cb1, *cb2; |
| 85 |
|
|
{ |
| 86 |
|
|
register int c; |
| 87 |
|
|
|
| 88 |
|
|
if (!cb1->wants) /* put orphans at the end, unsorted */ |
| 89 |
|
|
return(cb2->wants); |
| 90 |
|
|
if ((c = cb1->bi - cb2->bi)) /* sort on beam index first */ |
| 91 |
|
|
return(c); |
| 92 |
|
|
return(cb1->hd - cb2->hd); /* use hd to resolve matches */ |
| 93 |
|
|
} |
| 94 |
|
|
|
| 95 |
|
|
|
| 96 |
|
|
int |
| 97 |
|
|
findcbeam(hd, bi) /* find the specified beam in our sorted list */ |
| 98 |
|
|
int hd, bi; |
| 99 |
|
|
{ |
| 100 |
|
|
struct beamcomp cb; |
| 101 |
|
|
register struct beamcomp *p; |
| 102 |
|
|
|
| 103 |
|
|
if (ncbeams <= 0) |
| 104 |
|
|
return(-1); |
| 105 |
|
|
cb.wants = 0; cb.hd = hd; cb.bi = bi; |
| 106 |
|
|
p = (struct beamcomp *)bsearch((char *)&cb, (char *)cbeam, ncbeams, |
| 107 |
|
|
sizeof(struct beamcomp), cbeamcmp); |
| 108 |
|
|
if (p == NULL) |
| 109 |
|
|
return(-1); |
| 110 |
|
|
return(p - cbeam); |
| 111 |
|
|
} |
| 112 |
|
|
|
| 113 |
|
|
|
| 114 |
|
|
int |
| 115 |
|
|
getcbeam(hd, bi) /* get the specified beam, allocating as necessary */ |
| 116 |
|
|
register int hd; |
| 117 |
|
|
int bi; |
| 118 |
|
|
{ |
| 119 |
|
|
register int n; |
| 120 |
|
|
/* first, look in sorted list */ |
| 121 |
|
|
if ((n = findcbeam(hd, bi)) >= 0) |
| 122 |
|
|
return(n); |
| 123 |
|
|
/* linear search through xcbeams to be sure */ |
| 124 |
|
|
for (n = ncbeams+xcbeams; n-- > ncbeams; ) |
| 125 |
|
|
if (cbeam[n].bi == bi && cbeam[n].hd == hd) |
| 126 |
|
|
return(n); |
| 127 |
|
|
/* check legality */ |
| 128 |
|
|
if (hd < 0 | hd >= HDMAX || hdlist[hd] == NULL) |
| 129 |
|
|
error(INTERNAL, "illegal holodeck number in getcbeam"); |
| 130 |
|
|
if (bi < 1 | bi > nbeams(hdlist[hd])) |
| 131 |
|
|
error(INTERNAL, "illegal beam index in getcbeam"); |
| 132 |
|
|
n = newcbeam(); /* allocate and assign */ |
| 133 |
|
|
cbeam[n].wants = 0; cbeam[n].hd = hd; cbeam[n].bi = bi; |
| 134 |
|
|
return(n); |
| 135 |
|
|
} |
| 136 |
|
|
|
| 137 |
|
|
|
| 138 |
|
|
cbeamsort(adopt) /* sort our beam list, possibly turning out orphans */ |
| 139 |
|
|
int adopt; |
| 140 |
|
|
{ |
| 141 |
|
|
register int i; |
| 142 |
|
|
|
| 143 |
|
|
if (!(ncbeams += xcbeams)) |
| 144 |
|
|
return; |
| 145 |
|
|
xcbeams = 0; |
| 146 |
|
|
qsort((char *)cbeam, ncbeams, sizeof(struct beamcomp), |
| 147 |
|
|
adopt ? cbeamcmp : cbeamcmp2); |
| 148 |
|
|
if (adopt) |
| 149 |
|
|
return; |
| 150 |
|
|
for (i = ncbeams; i--; ) /* identify orphans */ |
| 151 |
|
|
if (cbeam[i].wants) |
| 152 |
|
|
break; |
| 153 |
|
|
xcbeams = ncbeams - ++i; /* put orphans after ncbeams */ |
| 154 |
|
|
ncbeams = i; |
| 155 |
|
|
} |
| 156 |
|
|
|
| 157 |
|
|
|
| 158 |
|
|
cbeamadd(bl, n, v, hr, vr) /* add beams to server list */ |
| 159 |
|
|
register struct beamcomp *bl; |
| 160 |
|
|
int n; |
| 161 |
|
|
VIEW *v; |
| 162 |
|
|
int hr, vr; |
| 163 |
|
|
{ |
| 164 |
|
|
register PACKHEAD *pa; |
| 165 |
|
|
register int i; |
| 166 |
|
|
|
| 167 |
|
|
if (n <= 0) |
| 168 |
|
|
return; |
| 169 |
|
|
pa = (PACKHEAD *)malloc(n*sizeof(PACKHEAD)); |
| 170 |
|
|
if (pa == NULL) |
| 171 |
|
|
error(SYSTEM, "out of memory in cbeamadd"); |
| 172 |
|
|
for (i = 0; i < n; i++) |
| 173 |
|
|
pa[i].nr = npixels(v, hr, vr, |
| 174 |
|
|
hdlist[pa[i].hd=bl[i].hd], |
| 175 |
|
|
pa[i].bi=bl[i].bi) / 8; |
| 176 |
|
|
|
| 177 |
|
|
serv_request(DR_ADDSET, n*sizeof(PACKHEAD), (char *)pa); |
| 178 |
|
|
free((char *)pa); |
| 179 |
|
|
} |
| 180 |
|
|
|
| 181 |
|
|
|
| 182 |
|
|
cbeamdel(bl, n) /* delete unwanted beam requests */ |
| 183 |
|
|
register struct beamcomp *bl; |
| 184 |
|
|
int n; |
| 185 |
|
|
{ |
| 186 |
|
|
register PACKHEAD *pa; |
| 187 |
|
|
register int i; |
| 188 |
|
|
|
| 189 |
|
|
if (n <= 0) |
| 190 |
|
|
return; |
| 191 |
|
|
pa = (PACKHEAD *)malloc(n*sizeof(PACKHEAD)); |
| 192 |
|
|
if (pa == NULL) |
| 193 |
|
|
error(SYSTEM, "out of memory in cbeamdel"); |
| 194 |
|
|
for (i = 0; i < n; i++) { |
| 195 |
|
|
pa[i].hd = bl[i].hd; |
| 196 |
|
|
pa[i].bi = bl[i].bi; |
| 197 |
|
|
pa[i].nr = 0; /* removes any request */ |
| 198 |
|
|
} |
| 199 |
|
|
serv_request(DR_DELSET, n*sizeof(PACKHEAD), (char *)pa); |
| 200 |
|
|
free((char *)pa); |
| 201 |
|
|
} |
| 202 |
|
|
|
| 203 |
|
|
|
| 204 |
|
|
int |
| 205 |
|
|
set_voxels(vl, n) /* set new voxel array */ |
| 206 |
|
|
VOXL vl[8]; |
| 207 |
|
|
int n; |
| 208 |
|
|
{ |
| 209 |
|
|
short wmap[256]; |
| 210 |
|
|
int vmap[8]; |
| 211 |
|
|
int comn = 0; |
| 212 |
|
|
int no; |
| 213 |
|
|
register int i, j; |
| 214 |
|
|
/* find common voxels */ |
| 215 |
|
|
for (j = 0; j < 8 && voxel[j].hd >= 0; j++) { |
| 216 |
|
|
vmap[j] = -1; |
| 217 |
|
|
for (i = n; i--; ) |
| 218 |
|
|
if (!bcmp((char *)(vl+i), (char *)(voxel+j), |
| 219 |
|
|
sizeof(VOXL))) { |
| 220 |
|
|
vmap[j] = i; |
| 221 |
|
|
comn |= 1<<i; |
| 222 |
|
|
break; |
| 223 |
|
|
} |
| 224 |
|
|
} |
| 225 |
|
|
no = comn ? j : 0; /* compute flag mapping */ |
| 226 |
|
|
for (i = 256; i--; ) { |
| 227 |
|
|
wmap[i] = 0; |
| 228 |
|
|
for (j = no; j--; ) |
| 229 |
|
|
if (vmap[j] >= 0 && i & 1<<j) |
| 230 |
|
|
wmap[i] |= 1<<vmap[j]; |
| 231 |
|
|
} |
| 232 |
|
|
/* fix cbeam flags */ |
| 233 |
|
|
for (i = ncbeams; i--; ) |
| 234 |
|
|
cbeam[i].wants = wmap[cbeam[i].wants]; |
| 235 |
|
|
/* update our voxel list */ |
| 236 |
|
|
bcopy((char *)vl, (char *)voxel, n*sizeof(VOXL)); |
| 237 |
|
|
for (j = n; j < 8; j++) |
| 238 |
|
|
voxel[j].hd = -1; |
| 239 |
|
|
return(comn); /* return bit array of common voxels */ |
| 240 |
|
|
} |
| 241 |
|
|
|
| 242 |
|
|
|
| 243 |
|
|
int |
| 244 |
|
|
get_voxels(vl, vp) /* find voxels corresponding to view point */ |
| 245 |
|
|
VOXL vl[8]; |
| 246 |
|
|
FVECT vp; |
| 247 |
|
|
{ |
| 248 |
gregl |
3.3 |
static int lastn = 0, lastd = -1; |
| 249 |
gregl |
3.1 |
int n = 0; |
| 250 |
|
|
FVECT gp; |
| 251 |
|
|
double d; |
| 252 |
|
|
int dist, bestd = 0x7fff; |
| 253 |
|
|
VOXL vox; |
| 254 |
|
|
register int i, j, k; |
| 255 |
|
|
/* find closest voxels */ |
| 256 |
|
|
for (i = 0; n < 8 && hdlist[i]; i++) { |
| 257 |
|
|
hdgrid(gp, hdlist[i], vp); |
| 258 |
|
|
for (j = 0; n < 8 && j < 8; j++) { |
| 259 |
|
|
dist = 0; |
| 260 |
|
|
for (k = 0; k < 3; k++) { |
| 261 |
|
|
d = gp[k] - .5 + (j>>k & 1); |
| 262 |
|
|
if (d < 0.) |
| 263 |
|
|
dist += -(vox.i[k] = (int)d - 1); |
| 264 |
|
|
else if ((vox.i[k] = d) >= hdlist[i]->grid[k]) |
| 265 |
|
|
dist += vox.i[k] - |
| 266 |
|
|
hdlist[i]->grid[k] + 1; |
| 267 |
|
|
} |
| 268 |
|
|
if (dist > bestd) /* others were closer */ |
| 269 |
|
|
continue; |
| 270 |
|
|
if (dist < bestd) { /* start closer list */ |
| 271 |
|
|
n = 0; |
| 272 |
|
|
bestd = dist; |
| 273 |
|
|
} |
| 274 |
|
|
vox.hd = i; /* add this voxel */ |
| 275 |
|
|
copystruct(&vl[n], &vox); |
| 276 |
|
|
n++; |
| 277 |
|
|
} |
| 278 |
|
|
} |
| 279 |
gregl |
3.3 |
/* warn of dangerous moves */ |
| 280 |
|
|
if (n < lastn && bestd >= lastd) |
| 281 |
|
|
error(WARNING, "moving outside holodeck section"); |
| 282 |
|
|
else if (n > lastn && bestd <= lastd) |
| 283 |
|
|
error(WARNING, "moving inside holodeck section"); |
| 284 |
|
|
lastd = bestd; |
| 285 |
|
|
return(lastn = n); |
| 286 |
gregl |
3.1 |
} |
| 287 |
|
|
|
| 288 |
|
|
|
| 289 |
|
|
int |
| 290 |
|
|
dobeam(gcp, bp) /* express interest or disintrest in a beam */ |
| 291 |
|
|
GCOORD *gcp; |
| 292 |
|
|
register struct beamact *bp; |
| 293 |
|
|
{ |
| 294 |
|
|
GCOORD gc[2]; |
| 295 |
|
|
int bi, i; |
| 296 |
|
|
/* compute beam index */ |
| 297 |
|
|
copystruct(gc, gcp); |
| 298 |
|
|
copystruct(gc+1, &bp->gc); |
| 299 |
|
|
if ((bi = hdbindex(hdlist[voxel[bp->ca.vi].hd], gc)) <= 0) |
| 300 |
gregl |
3.2 |
error(CONSISTENCY, "bad grid coordinate in dobeam"); |
| 301 |
gregl |
3.1 |
if (bp->ca.add) { /* add it in */ |
| 302 |
|
|
i = getcbeam(voxel[bp->ca.vi].hd, bi); |
| 303 |
|
|
cbeam[i].wants |= 1<<bp->ca.vi; /* say we want it */ |
| 304 |
|
|
return(i == ncbeams+xcbeams-1); /* return 1 if totally new */ |
| 305 |
|
|
} |
| 306 |
|
|
/* else delete it */ |
| 307 |
|
|
i = findcbeam(voxel[bp->ca.vi].hd, bi); |
| 308 |
|
|
if (i >= 0 && cbeam[i].wants & 1<<bp->ca.vi) { |
| 309 |
|
|
cbeam[i].wants &= ~(1<<bp->ca.vi); /* we don't want it */ |
| 310 |
|
|
return(1); /* indicate change */ |
| 311 |
|
|
} |
| 312 |
|
|
return(0); |
| 313 |
|
|
} |
| 314 |
|
|
|
| 315 |
|
|
|
| 316 |
|
|
|
| 317 |
|
|
int |
| 318 |
|
|
docell(gcp, cap) /* find beams corresponding to cell and voxel */ |
| 319 |
|
|
GCOORD *gcp; |
| 320 |
|
|
register struct cellact *cap; |
| 321 |
|
|
{ |
| 322 |
|
|
FVECT org, dir[4]; |
| 323 |
|
|
FVECT gp, cv[4], vc; |
| 324 |
|
|
struct beamact bo; |
| 325 |
|
|
register int i; |
| 326 |
|
|
/* compute cell vertices */ |
| 327 |
|
|
hdcell(cv, hdlist[voxel[cap->vi].hd], gcp); |
| 328 |
|
|
/* compute cell and voxel centers */ |
| 329 |
|
|
for (i = 0; i < 3; i++) { |
| 330 |
|
|
org[i] = 0.5*(cv[0][i] + cv[2][i]); |
| 331 |
|
|
gp[i] = voxel[cap->vi].i[i] + 0.5; |
| 332 |
|
|
} |
| 333 |
|
|
hdworld(vc, hdlist[voxel[cap->vi].hd], gp); |
| 334 |
|
|
/* compute voxel pyramid using vector trick */ |
| 335 |
|
|
for (i = 0; i < 3; i++) { |
| 336 |
|
|
dir[0][i] = vc[i] - cv[0][i]; /* to 3 */ |
| 337 |
|
|
dir[2][i] = vc[i] - cv[3][i]; /* to 0 */ |
| 338 |
|
|
if (gcp->w & 1) { /* watch vertex order! */ |
| 339 |
|
|
dir[1][i] = vc[i] - cv[2][i]; /* to 1 */ |
| 340 |
|
|
dir[3][i] = vc[i] - cv[1][i]; /* to 2 */ |
| 341 |
|
|
} else { |
| 342 |
|
|
dir[1][i] = vc[i] - cv[1][i]; /* to 2 */ |
| 343 |
|
|
dir[3][i] = vc[i] - cv[2][i]; /* to 1 */ |
| 344 |
|
|
} |
| 345 |
|
|
} |
| 346 |
|
|
/* visit beams for opposite cells */ |
| 347 |
|
|
copystruct(&bo.ca, cap); |
| 348 |
|
|
copystruct(&bo.gc, gcp); |
| 349 |
|
|
return(visit_cells(org, dir, hdlist[voxel[cap->vi].hd], dobeam, &bo)); |
| 350 |
|
|
} |
| 351 |
|
|
|
| 352 |
|
|
|
| 353 |
|
|
int |
| 354 |
|
|
doview(cap, vp) /* visit cells for a given view */ |
| 355 |
|
|
struct cellact *cap; |
| 356 |
|
|
VIEW *vp; |
| 357 |
|
|
{ |
| 358 |
|
|
FVECT org, dir[4]; |
| 359 |
|
|
/* compute view pyramid */ |
| 360 |
|
|
if (vp->type == VT_PAR) goto viewerr; |
| 361 |
|
|
if (viewray(org, dir[0], vp, 0., 0.) < -FTINY) goto viewerr; |
| 362 |
|
|
if (viewray(org, dir[1], vp, 0., 1.) < -FTINY) goto viewerr; |
| 363 |
|
|
if (viewray(org, dir[2], vp, 1., 1.) < -FTINY) goto viewerr; |
| 364 |
|
|
if (viewray(org, dir[3], vp, 1., 0.) < -FTINY) goto viewerr; |
| 365 |
|
|
/* visit cells within pyramid */ |
| 366 |
|
|
return(visit_cells(org, dir, hdlist[voxel[cap->vi].hd], docell, cap)); |
| 367 |
|
|
viewerr: |
| 368 |
|
|
error(INTERNAL, "unusable view in doview"); |
| 369 |
|
|
} |
| 370 |
|
|
|
| 371 |
|
|
|
| 372 |
|
|
mvview(voxi, vold, vnew) /* move view for a voxel */ |
| 373 |
|
|
int voxi; |
| 374 |
|
|
VIEW *vold, *vnew; |
| 375 |
|
|
{ |
| 376 |
|
|
int netchange = 0; |
| 377 |
|
|
int *ocl, *ncl; |
| 378 |
|
|
struct cellact ca; |
| 379 |
|
|
int ocnt, ncnt; |
| 380 |
|
|
int c; |
| 381 |
|
|
register GCOORD *ogcp, *ngcp; |
| 382 |
|
|
/* get old and new cell lists */ |
| 383 |
|
|
ocl = getviewcells(hdlist[voxel[voxi].hd], vold); |
| 384 |
|
|
ncl = getviewcells(hdlist[voxel[voxi].hd], vnew); |
| 385 |
|
|
if (ocl != NULL) { |
| 386 |
|
|
ocnt = *ocl; ogcp = (GCOORD *)(ocl+1); |
| 387 |
|
|
} else { |
| 388 |
|
|
ocnt = 0; ogcp = NULL; |
| 389 |
|
|
} |
| 390 |
|
|
if (ncl != NULL) { |
| 391 |
|
|
ncnt = *ncl; ngcp = (GCOORD *)(ncl+1); |
| 392 |
|
|
} else { |
| 393 |
|
|
ncnt = 0; ngcp = NULL; |
| 394 |
|
|
} |
| 395 |
|
|
ca.vi = voxi; /* add and delete cells */ |
| 396 |
|
|
while (ocnt > 0 & ncnt > 0) |
| 397 |
|
|
if ((c = cellcmp(ogcp, ngcp)) > 0) { |
| 398 |
|
|
ca.add = 1; /* new cell */ |
| 399 |
|
|
netchange += docell(ngcp++, &ca); |
| 400 |
|
|
ncnt--; |
| 401 |
|
|
} else if (c < 0) { |
| 402 |
|
|
ca.add = 0; /* obsolete cell */ |
| 403 |
|
|
netchange -= docell(ogcp++, &ca); |
| 404 |
|
|
ocnt--; |
| 405 |
|
|
} else { |
| 406 |
|
|
ogcp++; ocnt--; /* unchanged cell */ |
| 407 |
|
|
ngcp++; ncnt--; |
| 408 |
|
|
} |
| 409 |
|
|
/* take care of list tails */ |
| 410 |
|
|
for (ca.add = 1; ncnt > 0; ncnt--) |
| 411 |
gregl |
3.2 |
netchange += docell(ngcp++, &ca); |
| 412 |
gregl |
3.1 |
for (ca.add = 0; ocnt > 0; ocnt--) |
| 413 |
gregl |
3.2 |
netchange -= docell(ogcp++, &ca); |
| 414 |
gregl |
3.1 |
/* clean up */ |
| 415 |
|
|
if (ocl != NULL) free((char *)ocl); |
| 416 |
|
|
if (ncl != NULL) free((char *)ncl); |
| 417 |
|
|
return(netchange); |
| 418 |
|
|
} |
| 419 |
|
|
|
| 420 |
|
|
|
| 421 |
|
|
beam_view(vo, vn) /* change beam view */ |
| 422 |
|
|
VIEW *vo, *vn; |
| 423 |
|
|
{ |
| 424 |
|
|
struct cellact ca; |
| 425 |
|
|
VOXL vlnew[8]; |
| 426 |
|
|
int n, comn; |
| 427 |
|
|
|
| 428 |
|
|
if (!vn->type) { /* clear our beam list */ |
| 429 |
|
|
set_voxels(vlnew, 0); |
| 430 |
|
|
cbeamdel(cbeam, ncbeams); |
| 431 |
|
|
ncbeams = 0; |
| 432 |
|
|
return; |
| 433 |
|
|
} |
| 434 |
|
|
/* find our new voxels */ |
| 435 |
|
|
n = get_voxels(vlnew, vn->vp); |
| 436 |
|
|
/* set the new voxels */ |
| 437 |
|
|
comn = set_voxels(vlnew, n); |
| 438 |
|
|
if (!vo->type) |
| 439 |
|
|
comn = 0; |
| 440 |
|
|
ca.add = 1; /* update our beam list */ |
| 441 |
|
|
for (ca.vi = n; ca.vi--; ) |
| 442 |
|
|
if (comn & 1<<ca.vi) /* change which cells we see */ |
| 443 |
|
|
mvview(ca.vi, vo, vn); |
| 444 |
|
|
else /* else add all new cells */ |
| 445 |
|
|
doview(&ca, vn); |
| 446 |
|
|
/* inform server of new beams */ |
| 447 |
|
|
cbeamadd(cbeam+ncbeams, xcbeams, vn, odev.hres, odev.vres); |
| 448 |
|
|
/* sort list to put orphans at end */ |
| 449 |
|
|
cbeamsort(0); |
| 450 |
|
|
/* tell server to delete orphans */ |
| 451 |
|
|
cbeamdel(cbeam+ncbeams, xcbeams); |
| 452 |
|
|
xcbeams = 0; /* truncate our list */ |
| 453 |
|
|
} |
