| 29 |
|
int qtMinNodesiz = 2; /* minimum node dimension (pixels) */ |
| 30 |
|
struct rleaves qtL; /* our pile of leaves */ |
| 31 |
|
|
| 32 |
+ |
static int4 falleaves; /* our list of fallen leaves */ |
| 33 |
+ |
|
| 34 |
+ |
#define composted(li) (qtL.bl <= qtL.tl ? \ |
| 35 |
+ |
((li) < qtL.bl || (li) >= qtL.tl) : \ |
| 36 |
+ |
((li) < qtL.bl && (li) >= qtL.tl)) |
| 37 |
+ |
|
| 38 |
|
#define TBUNDLESIZ 409 /* number of twigs in a bundle */ |
| 39 |
|
|
| 40 |
|
static RTREE **twigbundle; /* free twig blocks (NULL term.) */ |
| 41 |
|
static int nexttwig; /* next free twig */ |
| 42 |
|
|
| 37 |
– |
#define ungetleaf(li) (qtL.tl=(li)) /* dangerous if used improperly */ |
| 43 |
|
|
| 39 |
– |
|
| 44 |
|
static RTREE * |
| 45 |
|
newtwig() /* allocate a twig */ |
| 46 |
|
{ |
| 93 |
|
} |
| 94 |
|
|
| 95 |
|
|
| 92 |
– |
static int |
| 93 |
– |
newleaf() /* allocate a leaf from our pile */ |
| 94 |
– |
{ |
| 95 |
– |
int li; |
| 96 |
– |
|
| 97 |
– |
li = qtL.tl++; |
| 98 |
– |
if (qtL.tl >= qtL.nl) /* get next leaf in ring */ |
| 99 |
– |
qtL.tl = 0; |
| 100 |
– |
if (qtL.tl == qtL.bl) /* need to shake some free */ |
| 101 |
– |
qtCompost(LFREEPCT); |
| 102 |
– |
return(li); |
| 103 |
– |
} |
| 104 |
– |
|
| 105 |
– |
|
| 96 |
|
#define LEAFSIZ (3*sizeof(float)+sizeof(int4)+\ |
| 97 |
|
sizeof(TMbright)+6*sizeof(BYTE)) |
| 98 |
|
|
| 126 |
|
qtL.rgb = (BYTE (*)[3])(qtL.chr + n); |
| 127 |
|
qtL.nl = n; |
| 128 |
|
qtL.tml = qtL.bl = qtL.tl = 0; |
| 129 |
+ |
falleaves = -1; |
| 130 |
|
return(n); |
| 131 |
|
} |
| 132 |
|
|
| 157 |
|
tp->flgs &= ~BRF(i); |
| 158 |
|
} else if (tp->flgs & LFF(i)) { |
| 159 |
|
li = tp->k[i].li; |
| 160 |
< |
if (qtL.bl < qtL.tl ? |
| 170 |
< |
(li < qtL.bl || li >= qtL.tl) : |
| 171 |
< |
(li < qtL.bl && li >= qtL.tl)) |
| 160 |
> |
if (composted(li)) |
| 161 |
|
tp->flgs &= ~LFF(i); |
| 162 |
|
} |
| 163 |
|
} |
| 167 |
|
qtCompost(pct) /* free up some leaves */ |
| 168 |
|
int pct; |
| 169 |
|
{ |
| 170 |
+ |
register int4 *fl; |
| 171 |
|
int nused, nclear, nmapped; |
| 182 |
– |
|
| 172 |
|
/* figure out how many leaves to clear */ |
| 173 |
|
nclear = qtL.nl * pct / 100; |
| 174 |
|
nused = qtL.tl - qtL.bl; |
| 179 |
|
if (nclear >= nused) { /* clear them all */ |
| 180 |
|
qtFreeTree(0); |
| 181 |
|
qtL.tml = qtL.bl = qtL.tl = 0; |
| 182 |
+ |
falleaves = -1; |
| 183 |
|
return(nused); |
| 184 |
|
} |
| 185 |
|
/* else clear leaves from bottom */ |
| 188 |
|
qtL.bl += nclear; |
| 189 |
|
if (qtL.bl >= qtL.nl) qtL.bl -= qtL.nl; |
| 190 |
|
if (nmapped <= nclear) qtL.tml = qtL.bl; |
| 191 |
< |
shaketree(&qtrunk); |
| 191 |
> |
shaketree(&qtrunk); /* dereference composted leaves */ |
| 192 |
> |
for (fl = &falleaves; *fl >= 0; fl = qtL.wd + *fl) |
| 193 |
> |
while (composted(*fl)) |
| 194 |
> |
if ((*fl = qtL.wd[*fl]) < 0) |
| 195 |
> |
return(nclear); |
| 196 |
|
return(nclear); |
| 197 |
|
} |
| 198 |
|
|
| 199 |
|
|
| 206 |
– |
#define DCSCALE 11585.2 /* (1<<13)*sqrt(2) */ |
| 207 |
– |
#define FXNEG 01 |
| 208 |
– |
#define FYNEG 02 |
| 209 |
– |
#define FZNEG 04 |
| 210 |
– |
#define F1X 010 |
| 211 |
– |
#define F2Z 020 |
| 212 |
– |
#define F1SFT 5 |
| 213 |
– |
#define F2SFT 18 |
| 214 |
– |
#define FMASK 0x1fff |
| 215 |
– |
|
| 216 |
– |
static int4 |
| 217 |
– |
encodedir(dv) /* encode a normalized direction vector */ |
| 218 |
– |
FVECT dv; |
| 219 |
– |
{ |
| 220 |
– |
register int4 dc = 0; |
| 221 |
– |
int cd[3], cm; |
| 222 |
– |
register int i; |
| 223 |
– |
|
| 224 |
– |
for (i = 0; i < 3; i++) |
| 225 |
– |
if (dv[i] < 0.) { |
| 226 |
– |
cd[i] = dv[i] * -DCSCALE; |
| 227 |
– |
dc |= 1<<i; |
| 228 |
– |
} else |
| 229 |
– |
cd[i] = dv[i] * DCSCALE; |
| 230 |
– |
if (cd[0] <= cd[1]) { |
| 231 |
– |
dc |= F1X | cd[0] << F1SFT; |
| 232 |
– |
cm = cd[1]; |
| 233 |
– |
} else { |
| 234 |
– |
dc |= cd[1] << F1SFT; |
| 235 |
– |
cm = cd[0]; |
| 236 |
– |
} |
| 237 |
– |
if (cd[2] <= cm) |
| 238 |
– |
dc |= F2Z | cd[2] << F2SFT; |
| 239 |
– |
else |
| 240 |
– |
dc |= cm << F2SFT; |
| 241 |
– |
return(dc); |
| 242 |
– |
} |
| 243 |
– |
|
| 244 |
– |
|
| 245 |
– |
static |
| 246 |
– |
decodedir(dv, dc) /* decode a normalized direction vector */ |
| 247 |
– |
register FVECT dv; /* returned */ |
| 248 |
– |
register int4 dc; |
| 249 |
– |
{ |
| 250 |
– |
double d1, d2, der; |
| 251 |
– |
|
| 252 |
– |
d1 = ((dc>>F1SFT & FMASK)+.5)/DCSCALE; |
| 253 |
– |
d2 = ((dc>>F2SFT & FMASK)+.5)/DCSCALE; |
| 254 |
– |
der = sqrt(1. - d1*d1 - d2*d2); |
| 255 |
– |
if (dc & F1X) { |
| 256 |
– |
dv[0] = d1; |
| 257 |
– |
if (dc & F2Z) { dv[1] = der; dv[2] = d2; } |
| 258 |
– |
else { dv[1] = d2; dv[2] = der; } |
| 259 |
– |
} else { |
| 260 |
– |
dv[1] = d1; |
| 261 |
– |
if (dc & F2Z) { dv[0] = der; dv[2] = d2; } |
| 262 |
– |
else { dv[0] = d2; dv[2] = der; } |
| 263 |
– |
} |
| 264 |
– |
if (dc & FXNEG) dv[0] = -dv[0]; |
| 265 |
– |
if (dc & FYNEG) dv[1] = -dv[1]; |
| 266 |
– |
if (dc & FZNEG) dv[2] = -dv[2]; |
| 267 |
– |
} |
| 268 |
– |
|
| 269 |
– |
|
| 270 |
– |
static double |
| 271 |
– |
dir2diff(dc1, dc2) /* relative radians^2 between directions */ |
| 272 |
– |
int4 dc1, dc2; |
| 273 |
– |
{ |
| 274 |
– |
FVECT v1, v2; |
| 275 |
– |
|
| 276 |
– |
decodedir(v1, dc1); |
| 277 |
– |
decodedir(v2, dc2); |
| 278 |
– |
|
| 279 |
– |
return(2. - 2.*DOT(v1,v2)); |
| 280 |
– |
} |
| 281 |
– |
|
| 282 |
– |
|
| 283 |
– |
static double |
| 284 |
– |
fdir2diff(dc1, v2) /* relative radians^2 between directions */ |
| 285 |
– |
int4 dc1; |
| 286 |
– |
register FVECT v2; |
| 287 |
– |
{ |
| 288 |
– |
FVECT v1; |
| 289 |
– |
|
| 290 |
– |
decodedir(v1, dc1); |
| 291 |
– |
|
| 292 |
– |
return(2. - 2.*DOT(v1,v2)); |
| 293 |
– |
} |
| 294 |
– |
|
| 295 |
– |
|
| 200 |
|
int |
| 201 |
|
qtFindLeaf(x, y) /* find closest leaf to (x,y) */ |
| 202 |
|
int x, y; |
| 235 |
|
|
| 236 |
|
|
| 237 |
|
static |
| 238 |
< |
addleaf(li) /* add a leaf to our tree */ |
| 239 |
< |
int li; |
| 238 |
> |
putleaf(li, drop) /* put a leaf in our tree */ |
| 239 |
> |
register int li; |
| 240 |
> |
int drop; |
| 241 |
|
{ |
| 242 |
|
register RTREE *tp = &qtrunk; |
| 243 |
|
int x0=0, y0=0, x1=odev.hres, y1=odev.vres; |
| 244 |
< |
int lo = -1; |
| 244 |
> |
register int lo = -1; |
| 245 |
|
double d2; |
| 246 |
|
int x, y, mx, my; |
| 247 |
|
double z; |
| 248 |
|
FVECT ip, wp, vd; |
| 249 |
|
register int q; |
| 250 |
+ |
/* check for dead leaf */ |
| 251 |
+ |
if (!qtL.chr[li][1] && !(qtL.chr[li][0] | qtL.chr[li][2])) |
| 252 |
+ |
return(0); |
| 253 |
|
/* compute leaf location in view */ |
| 254 |
|
VCOPY(wp, qtL.wp[li]); |
| 255 |
|
viewloc(ip, &odev.v, wp); |
| 256 |
|
if (ip[2] <= 0. || ip[0] < 0. || ip[0] >= 1. |
| 257 |
|
|| ip[1] < 0. || ip[1] >= 1.) |
| 258 |
< |
return(-1); /* behind or outside view */ |
| 258 |
> |
goto dropit; /* behind or outside view */ |
| 259 |
|
#ifdef DEBUG |
| 260 |
|
if (odev.v.type == VT_PAR | odev.v.vfore > FTINY) |
| 261 |
< |
error(INTERNAL, "bad view assumption in addleaf"); |
| 261 |
> |
error(INTERNAL, "bad view assumption in putleaf"); |
| 262 |
|
#endif |
| 263 |
|
for (q = 0; q < 3; q++) |
| 264 |
|
vd[q] = (wp[q] - odev.v.vp[q])/ip[2]; |
| 265 |
|
d2 = fdir2diff(qtL.wd[li], vd); |
| 266 |
|
#ifdef MAXDIFF2 |
| 267 |
|
if (d2 > MAXDIFF2) |
| 268 |
< |
return(0); /* leaf dir. too far off */ |
| 268 |
> |
goto dropit; /* leaf dir. too far off */ |
| 269 |
|
#endif |
| 270 |
|
x = ip[0] * odev.hres; |
| 271 |
|
y = ip[1] * odev.vres; |
| 287 |
|
if (!(tp->flgs & LFF(q))) { /* found stem for leaf */ |
| 288 |
|
tp->k[q].li = li; |
| 289 |
|
tp->flgs |= CHLFF(q); |
| 290 |
< |
break; |
| 290 |
> |
return(1); |
| 291 |
|
} |
| 292 |
|
if (lo != tp->k[q].li) { /* check old leaf */ |
| 293 |
|
lo = tp->k[q].li; |
| 297 |
|
/* is node minimum size? */ |
| 298 |
|
if (y1-y0 <= qtMinNodesiz || x1-x0 <= qtMinNodesiz) { |
| 299 |
|
if (z > (1.+qtDepthEps)*ip[2]) |
| 300 |
< |
return(0); /* old one closer */ |
| 300 |
> |
break; /* old one closer */ |
| 301 |
|
if (z >= (1.-qtDepthEps)*ip[2] && |
| 302 |
|
fdir2diff(qtL.wd[lo], vd) < d2) |
| 303 |
< |
return(0); /* old one better */ |
| 304 |
< |
tp->k[q].li = li; /* else new one is */ |
| 303 |
> |
break; /* old one better */ |
| 304 |
> |
tp->k[q].li = li; /* attach new */ |
| 305 |
|
tp->flgs |= CHF(q); |
| 306 |
+ |
li = lo; /* drop old... */ |
| 307 |
|
break; |
| 308 |
|
} |
| 309 |
|
tp->flgs &= ~LFF(q); /* else grow tree */ |
| 317 |
|
tp->flgs = CH_ANY|LFF(q); /* all new */ |
| 318 |
|
tp->k[q].li = lo; |
| 319 |
|
} |
| 320 |
< |
return(1); /* done */ |
| 320 |
> |
dropit: |
| 321 |
> |
if (drop) |
| 322 |
> |
if (li+1 == (qtL.tl ? qtL.tl : qtL.nl)) |
| 323 |
> |
qtL.tl = li; /* special case */ |
| 324 |
> |
else { |
| 325 |
> |
qtL.chr[li][0] = qtL.chr[li][1] = qtL.chr[li][2] = 0; |
| 326 |
> |
qtL.wd[li] = falleaves; |
| 327 |
> |
falleaves = li; |
| 328 |
> |
} |
| 329 |
> |
return(li == lo); |
| 330 |
|
} |
| 331 |
|
|
| 332 |
|
|
| 335 |
|
FVECT p, v; |
| 336 |
|
{ |
| 337 |
|
register int li; |
| 338 |
< |
|
| 339 |
< |
li = newleaf(); |
| 338 |
> |
int mapit; |
| 339 |
> |
/* grab a leaf */ |
| 340 |
> |
if (!imm_mode && falleaves >= 0) { /* check for fallen leaves */ |
| 341 |
> |
li = falleaves; |
| 342 |
> |
falleaves = qtL.wd[li]; |
| 343 |
> |
mapit = qtL.tml <= qtL.tl ? |
| 344 |
> |
(li < qtL.tml || li >= qtL.tl) : |
| 345 |
> |
(li < qtL.tml && li >= qtL.tl) ; |
| 346 |
> |
} else { /* else allocate new one */ |
| 347 |
> |
li = qtL.tl++; |
| 348 |
> |
if (qtL.tl >= qtL.nl) /* next leaf in ring */ |
| 349 |
> |
qtL.tl = 0; |
| 350 |
> |
if (qtL.tl == qtL.bl) /* need to shake some free */ |
| 351 |
> |
qtCompost(LFREEPCT); |
| 352 |
> |
mapit = 0; /* we'll map it later */ |
| 353 |
> |
} |
| 354 |
|
VCOPY(qtL.wp[li], p); |
| 355 |
|
qtL.wd[li] = encodedir(v); |
| 356 |
|
tmCvColrs(&qtL.brt[li], qtL.chr[li], c, 1); |
| 357 |
< |
if (!addleaf(li)) |
| 358 |
< |
ungetleaf(li); |
| 357 |
> |
if (putleaf(li, 1) && mapit) |
| 358 |
> |
tmMapPixels(qtL.rgb+li, qtL.brt+li, qtL.chr+li, 1); |
| 359 |
|
} |
| 360 |
|
|
| 361 |
|
|
| 368 |
|
qtFreeTree(0); /* blow the old tree away */ |
| 369 |
|
/* regrow it in new place */ |
| 370 |
|
for (i = qtL.bl; i != qtL.tl; ) { |
| 371 |
< |
addleaf(i); |
| 371 |
> |
putleaf(i, 0); |
| 372 |
|
if (++i >= qtL.nl) i = 0; |
| 373 |
|
} |
| 374 |
|
} |
