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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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#ifndef lint |
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< |
static char SCCSid[] = "$SunId$ SGI"; |
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> |
static const char RCSid[] = "$Id$"; |
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#endif |
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|
| 4 |
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/* |
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* Quadtree driver support routines. |
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*/ |
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|
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#include <string.h> |
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|
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#include "standard.h" |
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#include "rhd_qtree.h" |
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/* quantity of leaves to free at a time */ |
| 15 |
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#endif |
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/* maximum allowed angle difference (deg.) */ |
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#ifndef MAXANG |
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< |
#define MAXANG 20. |
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> |
#define MAXANG 20 |
| 19 |
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#endif |
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+ |
#if MAXANG>0 |
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+ |
#define MAXDIFF2 ( MAXANG*MAXANG * (PI*PI/180./180.)) |
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#endif |
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|
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#define MAXDIFF2 (long)( MAXANG*MAXANG /90./90.*(1L<<15)*(1L<<15)) |
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|
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#define abs(i) ((i) < 0 ? -(i) : (i)) |
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|
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RTREE qtrunk; /* our quadtree trunk */ |
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int qtMinNodesiz = 2; /* minimum node dimension (pixels) */ |
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struct rleaves qtL; /* our pile of leaves */ |
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|
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int rayqleft = 0; /* rays left to queue before flush */ |
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|
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static int32 falleaves; /* our list of fallen leaves */ |
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|
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#define composted(li) (qtL.bl <= qtL.tl ? \ |
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+ |
((li) < qtL.bl || (li) >= qtL.tl) : \ |
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+ |
((li) < qtL.bl && (li) >= qtL.tl)) |
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|
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#define TBUNDLESIZ 409 /* number of twigs in a bundle */ |
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|
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static RTREE **twigbundle; /* free twig blocks (NULL term.) */ |
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static int nexttwig; /* next free twig */ |
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|
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#define ungetleaf(li) (qtL.tl=(li)) /* dangerous if used improperly */ |
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|
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|
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static RTREE * |
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newtwig() /* allocate a twig */ |
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{ |
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} |
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bi = nexttwig / TBUNDLESIZ; |
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if (twigbundle[bi] == NULL) { /* new block */ |
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twigbundle = (RTREE **)realloc((char *)twigbundle, |
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twigbundle = (RTREE **)realloc((void *)twigbundle, |
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(bi+2)*sizeof(RTREE *)); |
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if (twigbundle == NULL) |
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goto memerr; |
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nexttwig = 0; |
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if (!really) { /* just clear allocated blocks */ |
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while (i--) |
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< |
bzero((char *)twigbundle[i], TBUNDLESIZ*sizeof(RTREE)); |
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> |
memset((char *)twigbundle[i], '\0', TBUNDLESIZ*sizeof(RTREE)); |
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return; |
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} |
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/* else "really" means free up memory */ |
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for (i = 0; twigbundle[i] != NULL; i++) |
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free((char *)twigbundle[i]); |
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free((char *)twigbundle); |
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> |
free((void *)twigbundle[i]); |
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> |
free((void *)twigbundle); |
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twigbundle = NULL; |
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} |
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|
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|
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static int |
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newleaf() /* allocate a leaf from our pile */ |
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{ |
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int li; |
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|
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< |
li = qtL.tl++; |
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< |
if (qtL.tl >= qtL.nl) /* get next leaf in ring */ |
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qtL.tl = 0; |
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if (qtL.tl == qtL.bl) /* need to shake some free */ |
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qtCompost(LFREEPCT); |
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return(li); |
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} |
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|
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|
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#define LEAFSIZ (3*sizeof(float)+2*sizeof(short)+\ |
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> |
#define LEAFSIZ (3*sizeof(float)+sizeof(int32)+\ |
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sizeof(TMbright)+6*sizeof(BYTE)) |
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|
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int |
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return(0); |
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/* assign larger alignment types earlier */ |
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qtL.wp = (float (*)[3])qtL.base; |
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qtL.wd = (short (*)[2])(qtL.wp + n); |
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> |
qtL.wd = (int32 *)(qtL.wp + n); |
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qtL.brt = (TMbright *)(qtL.wd + n); |
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qtL.chr = (BYTE (*)[3])(qtL.brt + n); |
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qtL.rgb = (BYTE (*)[3])(qtL.chr + n); |
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qtL.nl = n; |
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qtL.tml = qtL.bl = qtL.tl = 0; |
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falleaves = -1; |
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return(n); |
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} |
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|
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tp->flgs &= ~BRF(i); |
| 159 |
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} else if (tp->flgs & LFF(i)) { |
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li = tp->k[i].li; |
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< |
if (qtL.bl < qtL.tl ? |
| 169 |
< |
(li < qtL.bl || li >= qtL.tl) : |
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< |
(li < qtL.bl && li >= qtL.tl)) |
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> |
if (composted(li)) |
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tp->flgs &= ~LFF(i); |
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} |
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} |
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qtCompost(pct) /* free up some leaves */ |
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int pct; |
| 170 |
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{ |
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+ |
register int32 *fl; |
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int nused, nclear, nmapped; |
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– |
|
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/* figure out how many leaves to clear */ |
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nclear = qtL.nl * pct / 100; |
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nused = qtL.tl - qtL.bl; |
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if (nclear >= nused) { /* clear them all */ |
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qtFreeTree(0); |
| 182 |
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qtL.tml = qtL.bl = qtL.tl = 0; |
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+ |
falleaves = -1; |
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return(nused); |
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} |
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/* else clear leaves from bottom */ |
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qtL.bl += nclear; |
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if (qtL.bl >= qtL.nl) qtL.bl -= qtL.nl; |
| 191 |
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if (nmapped <= nclear) qtL.tml = qtL.bl; |
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< |
shaketree(&qtrunk); |
| 192 |
> |
shaketree(&qtrunk); /* dereference composted leaves */ |
| 193 |
> |
for (fl = &falleaves; *fl >= 0; fl = qtL.wd + *fl) |
| 194 |
> |
while (composted(*fl)) |
| 195 |
> |
if ((*fl = qtL.wd[*fl]) < 0) |
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> |
return(nclear); |
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return(nclear); |
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} |
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|
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|
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static |
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encodedir(pa, dv) /* encode a normalized direction vector */ |
| 207 |
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short pa[2]; |
| 208 |
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FVECT dv; |
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{ |
| 210 |
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pa[1] = 0; |
| 211 |
– |
if (dv[2] >= 1.) |
| 212 |
– |
pa[0] = (1L<<15)-1; |
| 213 |
– |
else if (dv[2] <= -1.) |
| 214 |
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pa[0] = -((1L<<15)-1); |
| 215 |
– |
else { |
| 216 |
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pa[0] = ((1L<<15)-1)/(PI/2.) * asin(dv[2]); |
| 217 |
– |
pa[1] = ((1L<<15)-1)/PI * atan2(dv[1], dv[0]); |
| 218 |
– |
} |
| 219 |
– |
} |
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– |
|
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|
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– |
#define ALTSHFT 5 |
| 223 |
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#define NALT (1<<ALTSHFT) |
| 224 |
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#define azisft(alt) azisftab[abs(alt)>>(15-ALTSHFT)] |
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|
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static unsigned short azisftab[NALT]; |
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|
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static |
| 229 |
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azisftinit(alt) /* initialize azimuth scale factor table */ |
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int alt; |
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{ |
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register int i; |
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|
| 234 |
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for (i = NALT; i--; ) |
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azisftab[i] = 2.*(1L<<15) * cos(PI/2.*(i+.5)/NALT); |
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return(azisft(alt)); |
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} |
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|
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#define azisf(alt) (azisftab[0] ? azisft(alt) : azisftinit(alt)) >> 15 |
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|
| 241 |
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static long |
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dir2diff(pa1, pa2) /* relative distance^2 between directions */ |
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short pa1[2], pa2[2]; |
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{ |
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long altd2, azid2; |
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int alt; |
| 247 |
– |
|
| 248 |
– |
altd2 = pa1[0] - pa2[0]; /* get altitude difference^2 */ |
| 249 |
– |
altd2 *= altd2; |
| 250 |
– |
if (altd2 > MAXDIFF2) |
| 251 |
– |
return(altd2); /* too large already */ |
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– |
azid2 = pa1[1] - pa2[1]; /* get adjusted azimuth difference^2 */ |
| 253 |
– |
if (azid2 < 0) azid2 = -azid2; |
| 254 |
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if (azid2 >= 1L<<15) { /* wrap sphere */ |
| 255 |
– |
azid2 -= 1L<<16; |
| 256 |
– |
if (azid2 < 0) azid2 = -azid2; |
| 257 |
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} |
| 258 |
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alt = (pa1[0]+pa2[0])/2; |
| 259 |
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azid2 = azid2*azisf(alt); /* evaluation order is important */ |
| 260 |
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azid2 *= azid2; |
| 261 |
– |
return(altd2 + azid2); |
| 262 |
– |
} |
| 263 |
– |
|
| 264 |
– |
|
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int |
| 202 |
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qtFindLeaf(x, y) /* find closest leaf to (x,y) */ |
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int x, y; |
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|
| 237 |
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|
| 238 |
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static |
| 239 |
< |
addleaf(li) /* add a leaf to our tree */ |
| 240 |
< |
int li; |
| 239 |
> |
putleaf(li, drop) /* put a leaf in our tree */ |
| 240 |
> |
register int li; |
| 241 |
> |
int drop; |
| 242 |
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{ |
| 243 |
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register RTREE *tp = &qtrunk; |
| 244 |
|
int x0=0, y0=0, x1=odev.hres, y1=odev.vres; |
| 245 |
< |
int lo = -1; |
| 246 |
< |
long d2; |
| 310 |
< |
short dc[2]; |
| 245 |
> |
register int lo = -1; |
| 246 |
> |
double d2; |
| 247 |
|
int x, y, mx, my; |
| 248 |
|
double z; |
| 249 |
< |
FVECT ip, wp; |
| 249 |
> |
FVECT ip, wp, vd; |
| 250 |
|
register int q; |
| 251 |
+ |
/* check for dead leaf */ |
| 252 |
+ |
if (!qtL.chr[li][1] && !(qtL.chr[li][0] | qtL.chr[li][2])) |
| 253 |
+ |
return(0); |
| 254 |
|
/* compute leaf location in view */ |
| 255 |
|
VCOPY(wp, qtL.wp[li]); |
| 256 |
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viewloc(ip, &odev.v, wp); |
| 257 |
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if (ip[2] <= 0. || ip[0] < 0. || ip[0] >= 1. |
| 258 |
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|| ip[1] < 0. || ip[1] >= 1.) |
| 259 |
< |
return(0); /* behind or outside view */ |
| 259 |
> |
goto dropit; /* behind or outside view */ |
| 260 |
|
#ifdef DEBUG |
| 261 |
|
if (odev.v.type == VT_PAR | odev.v.vfore > FTINY) |
| 262 |
< |
error(INTERNAL, "bad view assumption in addleaf"); |
| 262 |
> |
error(INTERNAL, "bad view assumption in putleaf"); |
| 263 |
|
#endif |
| 264 |
|
for (q = 0; q < 3; q++) |
| 265 |
< |
wp[q] = (wp[q] - odev.v.vp[q])/ip[2]; |
| 266 |
< |
encodedir(dc, wp); /* compute pixel direction */ |
| 267 |
< |
d2 = dir2diff(dc, qtL.wd[li]); |
| 265 |
> |
vd[q] = (wp[q] - odev.v.vp[q])/ip[2]; |
| 266 |
> |
d2 = fdir2diff(qtL.wd[li], vd); |
| 267 |
> |
#ifdef MAXDIFF2 |
| 268 |
|
if (d2 > MAXDIFF2) |
| 269 |
< |
return(0); /* leaf dir. too far off */ |
| 269 |
> |
goto dropit; /* leaf dir. too far off */ |
| 270 |
> |
#endif |
| 271 |
|
x = ip[0] * odev.hres; |
| 272 |
|
y = ip[1] * odev.vres; |
| 273 |
|
z = ip[2]; |
| 288 |
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if (!(tp->flgs & LFF(q))) { /* found stem for leaf */ |
| 289 |
|
tp->k[q].li = li; |
| 290 |
|
tp->flgs |= CHLFF(q); |
| 291 |
< |
break; |
| 291 |
> |
return(1); |
| 292 |
|
} |
| 293 |
|
if (lo != tp->k[q].li) { /* check old leaf */ |
| 294 |
|
lo = tp->k[q].li; |
| 298 |
|
/* is node minimum size? */ |
| 299 |
|
if (y1-y0 <= qtMinNodesiz || x1-x0 <= qtMinNodesiz) { |
| 300 |
|
if (z > (1.+qtDepthEps)*ip[2]) |
| 301 |
< |
return(0); /* old one closer */ |
| 301 |
> |
break; /* old one closer */ |
| 302 |
|
if (z >= (1.-qtDepthEps)*ip[2] && |
| 303 |
< |
dir2diff(dc, qtL.wd[lo]) < d2) |
| 304 |
< |
return(0); /* old one better */ |
| 305 |
< |
tp->k[q].li = li; /* else new one is */ |
| 303 |
> |
fdir2diff(qtL.wd[lo], vd) < d2) |
| 304 |
> |
break; /* old one better */ |
| 305 |
> |
tp->k[q].li = li; /* attach new */ |
| 306 |
|
tp->flgs |= CHF(q); |
| 307 |
+ |
li = lo; /* drop old... */ |
| 308 |
|
break; |
| 309 |
|
} |
| 310 |
|
tp->flgs &= ~LFF(q); /* else grow tree */ |
| 315 |
|
my = ip[1] * odev.vres; |
| 316 |
|
if (mx >= (x0 + x1) >> 1) q |= 01; |
| 317 |
|
if (my >= (y0 + y1) >> 1) q |= 02; |
| 318 |
+ |
tp->flgs = CH_ANY|LFF(q); /* all new */ |
| 319 |
|
tp->k[q].li = lo; |
| 378 |
– |
tp->flgs |= LFF(q)|CH_ANY; /* all new */ |
| 320 |
|
} |
| 321 |
< |
return(1); /* done */ |
| 321 |
> |
dropit: |
| 322 |
> |
if (drop) |
| 323 |
> |
if (li+1 == (qtL.tl ? qtL.tl : qtL.nl)) |
| 324 |
> |
qtL.tl = li; /* special case */ |
| 325 |
> |
else { |
| 326 |
> |
qtL.chr[li][0] = qtL.chr[li][1] = qtL.chr[li][2] = 0; |
| 327 |
> |
qtL.wd[li] = falleaves; |
| 328 |
> |
falleaves = li; |
| 329 |
> |
} |
| 330 |
> |
return(li == lo); |
| 331 |
|
} |
| 332 |
|
|
| 333 |
|
|
| 334 |
< |
dev_value(c, p, v) /* add a pixel value to our quadtree */ |
| 334 |
> |
dev_value(c, d, p) /* add a pixel value to our quadtree */ |
| 335 |
|
COLR c; |
| 336 |
< |
FVECT p, v; |
| 336 |
> |
FVECT d, p; |
| 337 |
|
{ |
| 338 |
|
register int li; |
| 339 |
< |
|
| 340 |
< |
li = newleaf(); |
| 341 |
< |
VCOPY(qtL.wp[li], p); |
| 342 |
< |
encodedir(qtL.wd[li], v); |
| 343 |
< |
tmCvColrs(&qtL.brt[li], qtL.chr[li], c, 1); |
| 344 |
< |
if (!addleaf(li)) |
| 345 |
< |
ungetleaf(li); |
| 339 |
> |
int mapit; |
| 340 |
> |
/* grab a leaf */ |
| 341 |
> |
if (!imm_mode && falleaves >= 0) { /* check for fallen leaves */ |
| 342 |
> |
li = falleaves; |
| 343 |
> |
falleaves = qtL.wd[li]; |
| 344 |
> |
mapit = qtL.tml <= qtL.tl ? |
| 345 |
> |
(li < qtL.tml || li >= qtL.tl) : |
| 346 |
> |
(li < qtL.tml && li >= qtL.tl) ; |
| 347 |
> |
} else { /* else allocate new one */ |
| 348 |
> |
li = qtL.tl++; |
| 349 |
> |
if (qtL.tl >= qtL.nl) /* next leaf in ring */ |
| 350 |
> |
qtL.tl = 0; |
| 351 |
> |
if (qtL.tl == qtL.bl) /* need to shake some free */ |
| 352 |
> |
qtCompost(LFREEPCT); |
| 353 |
> |
mapit = 0; /* we'll map it later */ |
| 354 |
> |
} |
| 355 |
> |
if (p == NULL) |
| 356 |
> |
VSUM(qtL.wp[li], odev.v.vp, d, FHUGE); |
| 357 |
> |
else |
| 358 |
> |
VCOPY(qtL.wp[li], p); |
| 359 |
> |
qtL.wd[li] = encodedir(d); |
| 360 |
> |
tmCvColrs(&qtL.brt[li], qtL.chr[li], (COLR *)c, 1); |
| 361 |
> |
if (putleaf(li, 1)) { |
| 362 |
> |
if (mapit) |
| 363 |
> |
tmMapPixels((BYTE *)(qtL.rgb+li), qtL.brt+li, |
| 364 |
> |
(BYTE *)(qtL.chr+li), 1); |
| 365 |
> |
if (--rayqleft == 0) |
| 366 |
> |
dev_flush(); /* flush output */ |
| 367 |
> |
} |
| 368 |
|
} |
| 369 |
|
|
| 370 |
|
|
| 377 |
|
qtFreeTree(0); /* blow the old tree away */ |
| 378 |
|
/* regrow it in new place */ |
| 379 |
|
for (i = qtL.bl; i != qtL.tl; ) { |
| 380 |
< |
addleaf(i); |
| 380 |
> |
putleaf(i, 0); |
| 381 |
|
if (++i >= qtL.nl) i = 0; |
| 382 |
|
} |
| 383 |
|
} |
| 412 |
|
if (tmComputeMapping(0., 0., 0.) != TM_E_OK) |
| 413 |
|
return(0); |
| 414 |
|
} |
| 415 |
< |
if (tmMapPixels(qtL.rgb+aorg, qtL.brt+aorg, |
| 416 |
< |
qtL.chr+aorg, alen) != TM_E_OK) |
| 415 |
> |
if (tmMapPixels((BYTE *)(qtL.rgb+aorg), qtL.brt+aorg, |
| 416 |
> |
(BYTE *)(qtL.chr+aorg), alen) != TM_E_OK) |
| 417 |
|
return(0); |
| 418 |
|
if (blen > 0) |
| 419 |
< |
tmMapPixels(qtL.rgb+borg, qtL.brt+borg, |
| 420 |
< |
qtL.chr+borg, blen); |
| 419 |
> |
tmMapPixels((BYTE *)(qtL.rgb+borg), qtL.brt+borg, |
| 420 |
> |
(BYTE *)(qtL.chr+borg), blen); |
| 421 |
|
qtL.tml = qtL.tl; |
| 422 |
|
return(1); |
| 423 |
|
} |
