| 1 |
gregl |
3.17 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
| 2 |
gregl |
3.1 |
|
| 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 |
gregl |
3.9 |
#ifndef MAXDIST |
| 16 |
gregl |
3.14 |
#define MAXDIST 42 /* maximum distance outside section */ |
| 17 |
gregl |
3.9 |
#endif |
| 18 |
|
|
|
| 19 |
gregl |
3.5 |
extern GCOORD *getviewcells(); |
| 20 |
gregl |
3.1 |
|
| 21 |
gregl |
3.7 |
static VIEW dvw; /* current view corresponding to beam list */ |
| 22 |
|
|
|
| 23 |
gregl |
3.1 |
typedef struct { |
| 24 |
gregl |
3.2 |
int hd; /* holodeck section number (-1 if inactive) */ |
| 25 |
gregl |
3.1 |
int i[3]; /* voxel index (may be outside section) */ |
| 26 |
|
|
} VOXL; /* a voxel */ |
| 27 |
|
|
|
| 28 |
|
|
static VOXL voxel[8] = { /* current voxel list */ |
| 29 |
|
|
{-1}, {-1}, {-1}, {-1}, |
| 30 |
|
|
{-1}, {-1}, {-1}, {-1} |
| 31 |
|
|
}; |
| 32 |
|
|
|
| 33 |
|
|
#define CBEAMBLK 1024 /* cbeam allocation block size */ |
| 34 |
|
|
|
| 35 |
|
|
static struct beamcomp { |
| 36 |
|
|
short wants; /* flags telling which voxels want us */ |
| 37 |
|
|
short hd; /* holodeck section number */ |
| 38 |
|
|
int bi; /* beam index */ |
| 39 |
|
|
} *cbeam = NULL; /* current beam list */ |
| 40 |
|
|
|
| 41 |
|
|
static int ncbeams = 0; /* number of sorted beams in cbeam */ |
| 42 |
|
|
static int xcbeams = 0; /* extra (unregistered) beams past ncbeams */ |
| 43 |
|
|
static int maxcbeam = 0; /* size of cbeam array */ |
| 44 |
|
|
|
| 45 |
|
|
struct cellact { |
| 46 |
|
|
short vi; /* voxel index */ |
| 47 |
|
|
short add; /* zero means delete */ |
| 48 |
gregl |
3.5 |
short rev; /* reverse ray direction? */ |
| 49 |
gregl |
3.1 |
}; /* action for cell */ |
| 50 |
|
|
|
| 51 |
|
|
struct beamact { |
| 52 |
|
|
struct cellact ca; /* cell action */ |
| 53 |
|
|
GCOORD gc; /* grid coordinate */ |
| 54 |
|
|
}; /* beam origin and action */ |
| 55 |
|
|
|
| 56 |
|
|
|
| 57 |
|
|
int |
| 58 |
|
|
newcbeam() /* allocate new entry at end of cbeam array */ |
| 59 |
|
|
{ |
| 60 |
|
|
int i; |
| 61 |
|
|
|
| 62 |
|
|
if ((i = ncbeams + xcbeams++) >= maxcbeam) { /* grow array */ |
| 63 |
|
|
maxcbeam += CBEAMBLK; |
| 64 |
|
|
if (cbeam == NULL) |
| 65 |
|
|
cbeam = (struct beamcomp *)malloc( |
| 66 |
|
|
maxcbeam*sizeof(struct beamcomp) ); |
| 67 |
|
|
else |
| 68 |
|
|
cbeam = (struct beamcomp *)realloc( (char *)cbeam, |
| 69 |
|
|
maxcbeam*sizeof(struct beamcomp) ); |
| 70 |
|
|
if (cbeam == NULL) |
| 71 |
|
|
error(SYSTEM, "out of memory in newcbeam"); |
| 72 |
|
|
} |
| 73 |
|
|
return(i); |
| 74 |
|
|
} |
| 75 |
|
|
|
| 76 |
|
|
|
| 77 |
|
|
int |
| 78 |
|
|
cbeamcmp(cb1, cb2) /* compare two cbeam entries for sort: keep orphans */ |
| 79 |
|
|
register struct beamcomp *cb1, *cb2; |
| 80 |
|
|
{ |
| 81 |
|
|
register int c; |
| 82 |
|
|
|
| 83 |
|
|
if ((c = cb1->bi - cb2->bi)) /* sort on beam index first */ |
| 84 |
|
|
return(c); |
| 85 |
|
|
return(cb1->hd - cb2->hd); /* use hd to resolve matches */ |
| 86 |
|
|
} |
| 87 |
|
|
|
| 88 |
|
|
|
| 89 |
|
|
int |
| 90 |
|
|
cbeamcmp2(cb1, cb2) /* compare two cbeam entries for sort: no orphans */ |
| 91 |
|
|
register struct beamcomp *cb1, *cb2; |
| 92 |
|
|
{ |
| 93 |
|
|
register int c; |
| 94 |
|
|
|
| 95 |
|
|
if (!cb1->wants) /* put orphans at the end, unsorted */ |
| 96 |
|
|
return(cb2->wants); |
| 97 |
gregl |
3.15 |
if (!cb2->wants) |
| 98 |
|
|
return(-1); |
| 99 |
gregl |
3.1 |
if ((c = cb1->bi - cb2->bi)) /* sort on beam index first */ |
| 100 |
|
|
return(c); |
| 101 |
|
|
return(cb1->hd - cb2->hd); /* use hd to resolve matches */ |
| 102 |
|
|
} |
| 103 |
|
|
|
| 104 |
|
|
|
| 105 |
|
|
int |
| 106 |
|
|
findcbeam(hd, bi) /* find the specified beam in our sorted list */ |
| 107 |
|
|
int hd, bi; |
| 108 |
|
|
{ |
| 109 |
|
|
struct beamcomp cb; |
| 110 |
|
|
register struct beamcomp *p; |
| 111 |
|
|
|
| 112 |
|
|
if (ncbeams <= 0) |
| 113 |
|
|
return(-1); |
| 114 |
|
|
cb.wants = 0; cb.hd = hd; cb.bi = bi; |
| 115 |
|
|
p = (struct beamcomp *)bsearch((char *)&cb, (char *)cbeam, ncbeams, |
| 116 |
|
|
sizeof(struct beamcomp), cbeamcmp); |
| 117 |
|
|
if (p == NULL) |
| 118 |
|
|
return(-1); |
| 119 |
|
|
return(p - cbeam); |
| 120 |
|
|
} |
| 121 |
|
|
|
| 122 |
|
|
|
| 123 |
|
|
int |
| 124 |
|
|
getcbeam(hd, bi) /* get the specified beam, allocating as necessary */ |
| 125 |
|
|
register int hd; |
| 126 |
|
|
int bi; |
| 127 |
|
|
{ |
| 128 |
|
|
register int n; |
| 129 |
|
|
/* first, look in sorted list */ |
| 130 |
|
|
if ((n = findcbeam(hd, bi)) >= 0) |
| 131 |
|
|
return(n); |
| 132 |
|
|
/* linear search through xcbeams to be sure */ |
| 133 |
|
|
for (n = ncbeams+xcbeams; n-- > ncbeams; ) |
| 134 |
|
|
if (cbeam[n].bi == bi && cbeam[n].hd == hd) |
| 135 |
|
|
return(n); |
| 136 |
|
|
/* check legality */ |
| 137 |
|
|
if (hd < 0 | hd >= HDMAX || hdlist[hd] == NULL) |
| 138 |
|
|
error(INTERNAL, "illegal holodeck number in getcbeam"); |
| 139 |
|
|
if (bi < 1 | bi > nbeams(hdlist[hd])) |
| 140 |
|
|
error(INTERNAL, "illegal beam index in getcbeam"); |
| 141 |
|
|
n = newcbeam(); /* allocate and assign */ |
| 142 |
|
|
cbeam[n].wants = 0; cbeam[n].hd = hd; cbeam[n].bi = bi; |
| 143 |
|
|
return(n); |
| 144 |
|
|
} |
| 145 |
|
|
|
| 146 |
|
|
|
| 147 |
|
|
cbeamsort(adopt) /* sort our beam list, possibly turning out orphans */ |
| 148 |
|
|
int adopt; |
| 149 |
|
|
{ |
| 150 |
|
|
register int i; |
| 151 |
|
|
|
| 152 |
|
|
if (!(ncbeams += xcbeams)) |
| 153 |
|
|
return; |
| 154 |
|
|
xcbeams = 0; |
| 155 |
|
|
qsort((char *)cbeam, ncbeams, sizeof(struct beamcomp), |
| 156 |
|
|
adopt ? cbeamcmp : cbeamcmp2); |
| 157 |
|
|
if (adopt) |
| 158 |
|
|
return; |
| 159 |
|
|
for (i = ncbeams; i--; ) /* identify orphans */ |
| 160 |
|
|
if (cbeam[i].wants) |
| 161 |
|
|
break; |
| 162 |
|
|
xcbeams = ncbeams - ++i; /* put orphans after ncbeams */ |
| 163 |
|
|
ncbeams = i; |
| 164 |
|
|
} |
| 165 |
|
|
|
| 166 |
|
|
|
| 167 |
gregl |
3.4 |
cbeamop(op, bl, n, v, hr, vr) /* update beams on server list */ |
| 168 |
|
|
int op; |
| 169 |
gregl |
3.1 |
register struct beamcomp *bl; |
| 170 |
|
|
int n; |
| 171 |
|
|
VIEW *v; |
| 172 |
|
|
int hr, vr; |
| 173 |
|
|
{ |
| 174 |
|
|
register PACKHEAD *pa; |
| 175 |
|
|
register int i; |
| 176 |
|
|
|
| 177 |
|
|
if (n <= 0) |
| 178 |
|
|
return; |
| 179 |
|
|
pa = (PACKHEAD *)malloc(n*sizeof(PACKHEAD)); |
| 180 |
|
|
if (pa == NULL) |
| 181 |
|
|
error(SYSTEM, "out of memory in cbeamadd"); |
| 182 |
|
|
for (i = 0; i < n; i++) { |
| 183 |
|
|
pa[i].hd = bl[i].hd; |
| 184 |
|
|
pa[i].bi = bl[i].bi; |
| 185 |
gregl |
3.4 |
pa[i].nr = v==NULL ? 0 : |
| 186 |
|
|
npixels(v, hr, vr, hdlist[bl[i].hd], bl[i].bi); |
| 187 |
gregl |
3.16 |
pa[i].nc = 0; |
| 188 |
gregl |
3.1 |
} |
| 189 |
gregl |
3.4 |
serv_request(op, n*sizeof(PACKHEAD), (char *)pa); |
| 190 |
gregl |
3.1 |
free((char *)pa); |
| 191 |
|
|
} |
| 192 |
|
|
|
| 193 |
|
|
|
| 194 |
|
|
int |
| 195 |
|
|
set_voxels(vl, n) /* set new voxel array */ |
| 196 |
|
|
VOXL vl[8]; |
| 197 |
|
|
int n; |
| 198 |
|
|
{ |
| 199 |
|
|
short wmap[256]; |
| 200 |
|
|
int vmap[8]; |
| 201 |
|
|
int comn = 0; |
| 202 |
|
|
int no; |
| 203 |
|
|
register int i, j; |
| 204 |
|
|
/* find common voxels */ |
| 205 |
|
|
for (j = 0; j < 8 && voxel[j].hd >= 0; j++) { |
| 206 |
|
|
vmap[j] = -1; |
| 207 |
|
|
for (i = n; i--; ) |
| 208 |
|
|
if (!bcmp((char *)(vl+i), (char *)(voxel+j), |
| 209 |
|
|
sizeof(VOXL))) { |
| 210 |
|
|
vmap[j] = i; |
| 211 |
|
|
comn |= 1<<i; |
| 212 |
|
|
break; |
| 213 |
|
|
} |
| 214 |
|
|
} |
| 215 |
|
|
no = comn ? j : 0; /* compute flag mapping */ |
| 216 |
|
|
for (i = 256; i--; ) { |
| 217 |
|
|
wmap[i] = 0; |
| 218 |
|
|
for (j = no; j--; ) |
| 219 |
|
|
if (vmap[j] >= 0 && i & 1<<j) |
| 220 |
|
|
wmap[i] |= 1<<vmap[j]; |
| 221 |
|
|
} |
| 222 |
|
|
/* fix cbeam flags */ |
| 223 |
|
|
for (i = ncbeams; i--; ) |
| 224 |
|
|
cbeam[i].wants = wmap[cbeam[i].wants]; |
| 225 |
|
|
/* update our voxel list */ |
| 226 |
|
|
bcopy((char *)vl, (char *)voxel, n*sizeof(VOXL)); |
| 227 |
|
|
for (j = n; j < 8; j++) |
| 228 |
|
|
voxel[j].hd = -1; |
| 229 |
|
|
return(comn); /* return bit array of common voxels */ |
| 230 |
|
|
} |
| 231 |
|
|
|
| 232 |
|
|
|
| 233 |
|
|
int |
| 234 |
|
|
get_voxels(vl, vp) /* find voxels corresponding to view point */ |
| 235 |
|
|
VOXL vl[8]; |
| 236 |
|
|
FVECT vp; |
| 237 |
|
|
{ |
| 238 |
|
|
int n = 0; |
| 239 |
|
|
FVECT gp; |
| 240 |
|
|
double d; |
| 241 |
|
|
int dist, bestd = 0x7fff; |
| 242 |
|
|
VOXL vox; |
| 243 |
|
|
register int i, j, k; |
| 244 |
|
|
/* find closest voxels */ |
| 245 |
|
|
for (i = 0; n < 8 && hdlist[i]; i++) { |
| 246 |
|
|
hdgrid(gp, hdlist[i], vp); |
| 247 |
|
|
for (j = 0; n < 8 && j < 8; j++) { |
| 248 |
|
|
dist = 0; |
| 249 |
|
|
for (k = 0; k < 3; k++) { |
| 250 |
|
|
d = gp[k] - .5 + (j>>k & 1); |
| 251 |
|
|
if (d < 0.) |
| 252 |
|
|
dist += -(vox.i[k] = (int)d - 1); |
| 253 |
|
|
else if ((vox.i[k] = d) >= hdlist[i]->grid[k]) |
| 254 |
|
|
dist += vox.i[k] - |
| 255 |
|
|
hdlist[i]->grid[k] + 1; |
| 256 |
|
|
} |
| 257 |
|
|
if (dist > bestd) /* others were closer */ |
| 258 |
|
|
continue; |
| 259 |
|
|
if (dist < bestd) { /* start closer list */ |
| 260 |
|
|
n = 0; |
| 261 |
|
|
bestd = dist; |
| 262 |
|
|
} |
| 263 |
|
|
vox.hd = i; /* add this voxel */ |
| 264 |
|
|
copystruct(&vl[n], &vox); |
| 265 |
|
|
n++; |
| 266 |
|
|
} |
| 267 |
|
|
} |
| 268 |
gregl |
3.9 |
/* check for really stupid move */ |
| 269 |
|
|
if (bestd > MAXDIST) { |
| 270 |
gregl |
3.10 |
error(COMMAND, "move past outer limits"); |
| 271 |
gregl |
3.9 |
return(0); |
| 272 |
|
|
} |
| 273 |
gregl |
3.17 |
return(n); |
| 274 |
gregl |
3.1 |
} |
| 275 |
|
|
|
| 276 |
|
|
|
| 277 |
|
|
int |
| 278 |
|
|
dobeam(gcp, bp) /* express interest or disintrest in a beam */ |
| 279 |
|
|
GCOORD *gcp; |
| 280 |
|
|
register struct beamact *bp; |
| 281 |
|
|
{ |
| 282 |
|
|
GCOORD gc[2]; |
| 283 |
|
|
int bi, i; |
| 284 |
|
|
/* compute beam index */ |
| 285 |
gregl |
3.5 |
if (bp->ca.rev) { |
| 286 |
|
|
copystruct(gc, &bp->gc); |
| 287 |
|
|
copystruct(gc+1, gcp); |
| 288 |
|
|
} else { |
| 289 |
|
|
copystruct(gc, gcp); |
| 290 |
|
|
copystruct(gc+1, &bp->gc); |
| 291 |
|
|
} |
| 292 |
gregl |
3.1 |
if ((bi = hdbindex(hdlist[voxel[bp->ca.vi].hd], gc)) <= 0) |
| 293 |
gregl |
3.2 |
error(CONSISTENCY, "bad grid coordinate in dobeam"); |
| 294 |
gregl |
3.1 |
if (bp->ca.add) { /* add it in */ |
| 295 |
|
|
i = getcbeam(voxel[bp->ca.vi].hd, bi); |
| 296 |
|
|
cbeam[i].wants |= 1<<bp->ca.vi; /* say we want it */ |
| 297 |
|
|
return(i == ncbeams+xcbeams-1); /* return 1 if totally new */ |
| 298 |
|
|
} |
| 299 |
|
|
/* else delete it */ |
| 300 |
|
|
i = findcbeam(voxel[bp->ca.vi].hd, bi); |
| 301 |
|
|
if (i >= 0 && cbeam[i].wants & 1<<bp->ca.vi) { |
| 302 |
|
|
cbeam[i].wants &= ~(1<<bp->ca.vi); /* we don't want it */ |
| 303 |
|
|
return(1); /* indicate change */ |
| 304 |
|
|
} |
| 305 |
|
|
return(0); |
| 306 |
|
|
} |
| 307 |
|
|
|
| 308 |
|
|
|
| 309 |
|
|
|
| 310 |
|
|
int |
| 311 |
|
|
docell(gcp, cap) /* find beams corresponding to cell and voxel */ |
| 312 |
|
|
GCOORD *gcp; |
| 313 |
|
|
register struct cellact *cap; |
| 314 |
|
|
{ |
| 315 |
gregl |
3.10 |
register HOLO *hp = hdlist[voxel[cap->vi].hd]; |
| 316 |
gregl |
3.1 |
FVECT org, dir[4]; |
| 317 |
gregl |
3.10 |
FVECT vgp, cgp, vc; |
| 318 |
|
|
FVECT v1, v2; |
| 319 |
gregl |
3.1 |
struct beamact bo; |
| 320 |
gregl |
3.10 |
int axmax, j; |
| 321 |
|
|
double d, avmax; |
| 322 |
gregl |
3.1 |
register int i; |
| 323 |
gregl |
3.10 |
/* compute cell center */ |
| 324 |
|
|
cgp[gcp->w>>1] = gcp->w&1 ? hp->grid[gcp->w>>1] : 0 ; |
| 325 |
gregl |
3.18 |
cgp[hdwg0[gcp->w]] = gcp->i[0] + .5; |
| 326 |
|
|
cgp[hdwg1[gcp->w]] = gcp->i[1] + .5; |
| 327 |
gregl |
3.10 |
hdworld(org, hp, cgp); |
| 328 |
|
|
/* compute direction to voxel center */ |
| 329 |
|
|
for (i = 3; i--; ) |
| 330 |
gregl |
3.11 |
vgp[i] = voxel[cap->vi].i[i] + .5; |
| 331 |
gregl |
3.10 |
hdworld(vc, hp, vgp); |
| 332 |
|
|
for (i = 3; i--; ) |
| 333 |
|
|
vc[i] -= org[i]; |
| 334 |
|
|
/* compute maximum area axis */ |
| 335 |
|
|
axmax = -1; avmax = 0; |
| 336 |
|
|
for (i = 3; i--; ) { |
| 337 |
|
|
d = vgp[i] - cgp[i]; |
| 338 |
gregl |
3.12 |
if (d < 0.) d = -d; |
| 339 |
gregl |
3.10 |
if (d > avmax) { |
| 340 |
|
|
avmax = d; |
| 341 |
|
|
axmax = i; |
| 342 |
gregl |
3.1 |
} |
| 343 |
|
|
} |
| 344 |
gregl |
3.10 |
#ifdef DEBUG |
| 345 |
gregl |
3.12 |
if (axmax < 0.) |
| 346 |
gregl |
3.10 |
error(CONSISTENCY, "botched axis computation in docell"); |
| 347 |
|
|
#endif |
| 348 |
|
|
/* compute offset vectors */ |
| 349 |
|
|
d = 0.5/hp->grid[j=(axmax+1)%3]; |
| 350 |
|
|
for (i = 3; i--; ) |
| 351 |
|
|
v1[i] = hp->xv[j][i] * d; |
| 352 |
|
|
d = 0.5/hp->grid[j=(axmax+2)%3]; |
| 353 |
gregl |
3.18 |
if (DOT(hp->wg[axmax], vc) < 0.) |
| 354 |
|
|
d = -d; /* reverse vertex order */ |
| 355 |
gregl |
3.10 |
for (i = 3; i--; ) |
| 356 |
|
|
v2[i] = hp->xv[j][i] * d; |
| 357 |
|
|
/* compute voxel pyramid */ |
| 358 |
|
|
for (i = 3; i--; ) { |
| 359 |
|
|
dir[0][i] = vc[i] - v1[i] - v2[i]; |
| 360 |
|
|
dir[1][i] = vc[i] + v1[i] - v2[i]; |
| 361 |
|
|
dir[2][i] = vc[i] + v1[i] + v2[i]; |
| 362 |
|
|
dir[3][i] = vc[i] - v1[i] + v2[i]; |
| 363 |
|
|
} |
| 364 |
gregl |
3.1 |
/* visit beams for opposite cells */ |
| 365 |
|
|
copystruct(&bo.ca, cap); |
| 366 |
|
|
copystruct(&bo.gc, gcp); |
| 367 |
gregl |
3.10 |
return(visit_cells(org, dir, hp, dobeam, &bo)); |
| 368 |
gregl |
3.1 |
} |
| 369 |
|
|
|
| 370 |
|
|
|
| 371 |
|
|
int |
| 372 |
|
|
doview(cap, vp) /* visit cells for a given view */ |
| 373 |
|
|
struct cellact *cap; |
| 374 |
|
|
VIEW *vp; |
| 375 |
|
|
{ |
| 376 |
gregl |
3.5 |
int orient; |
| 377 |
gregl |
3.1 |
FVECT org, dir[4]; |
| 378 |
|
|
/* compute view pyramid */ |
| 379 |
gregl |
3.5 |
orient = viewpyramid(org, dir, hdlist[voxel[cap->vi].hd], vp); |
| 380 |
|
|
if (!orient) |
| 381 |
|
|
error(INTERNAL, "unusable view in doview"); |
| 382 |
|
|
cap->rev = orient < 0; |
| 383 |
gregl |
3.1 |
/* visit cells within pyramid */ |
| 384 |
|
|
return(visit_cells(org, dir, hdlist[voxel[cap->vi].hd], docell, cap)); |
| 385 |
|
|
} |
| 386 |
|
|
|
| 387 |
|
|
|
| 388 |
|
|
mvview(voxi, vold, vnew) /* move view for a voxel */ |
| 389 |
|
|
int voxi; |
| 390 |
|
|
VIEW *vold, *vnew; |
| 391 |
|
|
{ |
| 392 |
|
|
int netchange = 0; |
| 393 |
gregl |
3.5 |
struct cellact oca, nca; |
| 394 |
gregl |
3.1 |
int ocnt, ncnt; |
| 395 |
gregl |
3.19 |
int nmatch = 0; |
| 396 |
gregl |
3.7 |
GCOORD *ogcl, *ngcl; |
| 397 |
gregl |
3.19 |
register int c; |
| 398 |
gregl |
3.1 |
register GCOORD *ogcp, *ngcp; |
| 399 |
|
|
/* get old and new cell lists */ |
| 400 |
gregl |
3.7 |
ogcp = ogcl = getviewcells(&ocnt, hdlist[voxel[voxi].hd], vold); |
| 401 |
|
|
ngcp = ngcl = getviewcells(&ncnt, hdlist[voxel[voxi].hd], vnew); |
| 402 |
gregl |
3.5 |
/* set up actions */ |
| 403 |
|
|
oca.vi = nca.vi = voxi; |
| 404 |
|
|
oca.add = 0; nca.add = 1; |
| 405 |
|
|
if ((oca.rev = ocnt < 0)) |
| 406 |
|
|
ocnt = -ocnt; |
| 407 |
|
|
if ((nca.rev = ncnt < 0)) |
| 408 |
|
|
ncnt = -ncnt; |
| 409 |
gregl |
3.19 |
if (oca.rev == nca.rev) { /* count matches */ |
| 410 |
|
|
int oc = ocnt, nc = ncnt; |
| 411 |
|
|
while (oc > 0 & nc > 0) { |
| 412 |
|
|
c = cellcmp(ogcp, ngcp); |
| 413 |
|
|
if (c >= 0) { ngcp++; nc--; } |
| 414 |
|
|
if (c <= 0) { ogcp++; oc--; } |
| 415 |
|
|
nmatch += c==0; |
| 416 |
|
|
} |
| 417 |
|
|
ogcp = ogcl; ngcp = ngcl; |
| 418 |
|
|
} |
| 419 |
|
|
if (nmatch < ocnt>>1) { /* faster to just delete old cells? */ |
| 420 |
|
|
for (c = ncbeams; c--; ) |
| 421 |
|
|
if (cbeam[c].wants & 1<<voxi) { |
| 422 |
|
|
cbeam[c].wants &= ~(1<<voxi); |
| 423 |
|
|
netchange--; |
| 424 |
gregl |
3.6 |
} |
| 425 |
gregl |
3.19 |
free((char *)ogcl); |
| 426 |
|
|
ogcl = NULL; ocnt = 0; |
| 427 |
|
|
} |
| 428 |
|
|
/* add and delete cells in order */ |
| 429 |
|
|
while (ocnt > 0 & ncnt > 0) |
| 430 |
|
|
if ((c = cellcmp(ogcp, ngcp)) > 0) { /* new cell */ |
| 431 |
|
|
netchange += docell(ngcp++, &nca); |
| 432 |
|
|
ncnt--; |
| 433 |
|
|
} else if (c < 0) { /* old cell */ |
| 434 |
|
|
netchange -= docell(ogcp++, &oca); |
| 435 |
|
|
ocnt--; |
| 436 |
|
|
} else { /* same cell */ |
| 437 |
|
|
ogcp++; ocnt--; |
| 438 |
|
|
ngcp++; ncnt--; |
| 439 |
|
|
} |
| 440 |
gregl |
3.1 |
/* take care of list tails */ |
| 441 |
gregl |
3.5 |
for ( ; ncnt > 0; ncnt--) |
| 442 |
|
|
netchange += docell(ngcp++, &nca); |
| 443 |
|
|
for ( ; ocnt > 0; ocnt--) |
| 444 |
|
|
netchange -= docell(ogcp++, &oca); |
| 445 |
gregl |
3.1 |
/* clean up */ |
| 446 |
gregl |
3.7 |
if (ogcl != NULL) free((char *)ogcl); |
| 447 |
|
|
if (ngcl != NULL) free((char *)ngcl); |
| 448 |
gregl |
3.1 |
return(netchange); |
| 449 |
|
|
} |
| 450 |
|
|
|
| 451 |
|
|
|
| 452 |
gregl |
3.12 |
int |
| 453 |
gregl |
3.4 |
beam_sync() /* synchronize beams on server */ |
| 454 |
|
|
{ |
| 455 |
|
|
cbeamop(DR_NEWSET, cbeam, ncbeams, &odev.v, odev.hres, odev.vres); |
| 456 |
gregl |
3.12 |
return(ncbeams); |
| 457 |
gregl |
3.4 |
} |
| 458 |
|
|
|
| 459 |
|
|
|
| 460 |
gregl |
3.9 |
beam_view(vn) /* change beam view (if advisable) */ |
| 461 |
gregl |
3.7 |
VIEW *vn; |
| 462 |
gregl |
3.1 |
{ |
| 463 |
|
|
struct cellact ca; |
| 464 |
|
|
VOXL vlnew[8]; |
| 465 |
|
|
int n, comn; |
| 466 |
|
|
|
| 467 |
gregl |
3.13 |
if (vn == NULL || !vn->type) { /* clear our beam list */ |
| 468 |
gregl |
3.1 |
set_voxels(vlnew, 0); |
| 469 |
gregl |
3.4 |
cbeamop(DR_DELSET, cbeam, ncbeams, NULL, 0, 0); |
| 470 |
gregl |
3.1 |
ncbeams = 0; |
| 471 |
gregl |
3.13 |
dvw.type = 0; |
| 472 |
gregl |
3.9 |
return(1); |
| 473 |
gregl |
3.1 |
} |
| 474 |
|
|
/* find our new voxels */ |
| 475 |
|
|
n = get_voxels(vlnew, vn->vp); |
| 476 |
gregl |
3.9 |
if (dvw.type && !n) { |
| 477 |
|
|
copystruct(vn, &dvw); /* cancel move */ |
| 478 |
|
|
return(0); |
| 479 |
|
|
} |
| 480 |
gregl |
3.1 |
/* set the new voxels */ |
| 481 |
|
|
comn = set_voxels(vlnew, n); |
| 482 |
gregl |
3.7 |
if (!dvw.type) |
| 483 |
gregl |
3.1 |
comn = 0; |
| 484 |
|
|
ca.add = 1; /* update our beam list */ |
| 485 |
|
|
for (ca.vi = n; ca.vi--; ) |
| 486 |
|
|
if (comn & 1<<ca.vi) /* change which cells we see */ |
| 487 |
gregl |
3.7 |
mvview(ca.vi, &dvw, vn); |
| 488 |
gregl |
3.1 |
else /* else add all new cells */ |
| 489 |
|
|
doview(&ca, vn); |
| 490 |
|
|
/* inform server of new beams */ |
| 491 |
gregl |
3.4 |
cbeamop(DR_ADDSET, cbeam+ncbeams, xcbeams, vn, odev.hres, odev.vres); |
| 492 |
gregl |
3.1 |
/* sort list to put orphans at end */ |
| 493 |
|
|
cbeamsort(0); |
| 494 |
|
|
/* tell server to delete orphans */ |
| 495 |
gregl |
3.4 |
cbeamop(DR_DELSET, cbeam+ncbeams, xcbeams, NULL, 0, 0); |
| 496 |
gregl |
3.1 |
xcbeams = 0; /* truncate our list */ |
| 497 |
gregl |
3.7 |
copystruct(&dvw, vn); /* record new view */ |
| 498 |
gregl |
3.9 |
return(1); |
| 499 |
gregl |
3.1 |
} |
