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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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#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 */ |
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#ifndef LFREEPCT |
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#define LFREEPCT 25 |
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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 |
| 19 |
+ |
#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 abs(i) ((i) < 0 ? -(i) : (i)) |
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|
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RTREE qtrunk; /* our quadtree trunk */ |
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< |
double qtDepthEps = .02; /* epsilon to compare depths (z fraction) */ |
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> |
double qtDepthEps = .05; /* epsilon to compare depths (z fraction) */ |
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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 is_stump(t) (!((t)->flgs & (BR_ANY|LF_ANY))) |
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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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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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#define LEAFSIZ (3*sizeof(float)+sizeof(int32)+\ |
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sizeof(TMbright)+6*sizeof(BYTE)) |
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|
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|
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#define LEAFSIZ (3*sizeof(float)+sizeof(TMbright)+6*sizeof(BYTE)) |
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|
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int |
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qtAllocLeaves(n) /* allocate space for n leaves */ |
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register int n; |
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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.brt = (TMbright *)(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); |
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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 ? |
| 159 |
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(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; |
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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); |
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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; |
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if (nmapped <= nclear) qtL.tml = qtL.bl; |
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< |
shaketree(&qtrunk); |
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> |
shaketree(&qtrunk); /* dereference composted leaves */ |
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> |
for (fl = &falleaves; *fl >= 0; fl = qtL.wd + *fl) |
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while (composted(*fl)) |
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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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static |
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addleaf(li) /* add a leaf to our tree */ |
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int li; |
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> |
putleaf(li, drop) /* put a leaf in our tree */ |
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> |
register int li; |
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> |
int drop; |
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{ |
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register RTREE *tp = &qtrunk; |
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int x0=0, y0=0, x1=odev.hres, y1=odev.vres; |
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< |
int lo = -1; |
| 245 |
> |
register int lo = -1; |
| 246 |
> |
double d2; |
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int x, y, mx, my; |
| 248 |
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double z; |
| 249 |
< |
FVECT ip, wp; |
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> |
FVECT ip, wp, vd; |
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register int q; |
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< |
/* compute leaf location */ |
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> |
/* check for dead leaf */ |
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> |
if (!qtL.chr[li][1] && !(qtL.chr[li][0] | qtL.chr[li][2])) |
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return(0); |
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> |
/* compute leaf location in view */ |
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VCOPY(wp, qtL.wp[li]); |
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viewloc(ip, &odev.v, wp); |
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if (ip[2] <= 0. || ip[0] < 0. || ip[0] >= 1. |
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|| ip[1] < 0. || ip[1] >= 1.) |
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< |
return; |
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> |
goto dropit; /* behind or outside view */ |
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> |
#ifdef DEBUG |
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> |
if (odev.v.type == VT_PAR | odev.v.vfore > FTINY) |
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> |
error(INTERNAL, "bad view assumption in putleaf"); |
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> |
#endif |
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> |
for (q = 0; q < 3; q++) |
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> |
vd[q] = (wp[q] - odev.v.vp[q])/ip[2]; |
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> |
d2 = fdir2diff(qtL.wd[li], vd); |
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> |
#ifdef MAXDIFF2 |
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> |
if (d2 > MAXDIFF2) |
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> |
goto dropit; /* leaf dir. too far off */ |
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> |
#endif |
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x = ip[0] * odev.hres; |
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y = ip[1] * odev.vres; |
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z = ip[2]; |
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if (!(tp->flgs & LFF(q))) { /* found stem for leaf */ |
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tp->k[q].li = li; |
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tp->flgs |= CHLFF(q); |
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< |
break; |
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> |
return(1); |
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} |
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< |
/* check existing leaf */ |
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< |
if (lo != tp->k[q].li) { |
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> |
if (lo != tp->k[q].li) { /* check old leaf */ |
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lo = tp->k[q].li; |
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VCOPY(wp, qtL.wp[lo]); |
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viewloc(ip, &odev.v, wp); |
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} |
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/* is node minimum size? */ |
| 299 |
< |
if (x1-x0 <= qtMinNodesiz || y1-y0 <= qtMinNodesiz) { |
| 300 |
< |
if (z > (1.-qtDepthEps)*ip[2]) /* who is closer? */ |
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< |
return; /* old one is */ |
| 302 |
< |
tp->k[q].li = li; /* new one is */ |
| 299 |
> |
if (y1-y0 <= qtMinNodesiz || x1-x0 <= qtMinNodesiz) { |
| 300 |
> |
if (z > (1.+qtDepthEps)*ip[2]) |
| 301 |
> |
break; /* old one closer */ |
| 302 |
> |
if (z >= (1.-qtDepthEps)*ip[2] && |
| 303 |
> |
fdir2diff(qtL.wd[lo], vd) < d2) |
| 304 |
> |
break; /* old one better */ |
| 305 |
> |
tp->k[q].li = li; /* attach new */ |
| 306 |
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tp->flgs |= CHF(q); |
| 307 |
+ |
li = lo; /* drop old... */ |
| 308 |
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break; |
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} |
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tp->flgs &= ~LFF(q); /* else grow tree */ |
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my = ip[1] * odev.vres; |
| 316 |
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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; |
| 294 |
– |
tp->flgs |= LFF(q)|CH_ANY; /* all new */ |
| 320 |
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} |
| 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 |
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} |
| 332 |
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|
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|
| 334 |
< |
dev_value(c, p) /* add a pixel value to our output queue */ |
| 334 |
> |
dev_value(c, d, p) /* add a pixel value to our quadtree */ |
| 335 |
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COLR c; |
| 336 |
< |
FVECT p; |
| 336 |
> |
FVECT d, p; |
| 337 |
|
{ |
| 338 |
|
register int li; |
| 339 |
< |
|
| 340 |
< |
li = newleaf(); |
| 341 |
< |
VCOPY(qtL.wp[li], p); |
| 342 |
< |
tmCvColrs(&qtL.brt[li], qtL.chr[li], c, 1); |
| 343 |
< |
addleaf(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 |
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} |
| 369 |
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|
| 370 |
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|
| 377 |
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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); |
| 364 |
– |
} |
| 365 |
– |
|
| 366 |
– |
|
| 367 |
– |
static |
| 368 |
– |
redraw(tp, x0, y0, x1, y1, l) /* mark portion of a tree for redraw */ |
| 369 |
– |
register RTREE *tp; |
| 370 |
– |
int x0, y0, x1, y1; |
| 371 |
– |
int l[2][2]; |
| 372 |
– |
{ |
| 373 |
– |
int quads = CH_ANY; |
| 374 |
– |
int mx, my; |
| 375 |
– |
register int i; |
| 376 |
– |
/* compute midpoint */ |
| 377 |
– |
mx = (x0 + x1) >> 1; |
| 378 |
– |
my = (y0 + y1) >> 1; |
| 379 |
– |
/* see what to do */ |
| 380 |
– |
if (l[0][0] >= mx) |
| 381 |
– |
quads &= ~(CHF(2)|CHF(0)); |
| 382 |
– |
else if (l[0][1] < mx) |
| 383 |
– |
quads &= ~(CHF(3)|CHF(1)); |
| 384 |
– |
if (l[1][0] >= my) |
| 385 |
– |
quads &= ~(CHF(1)|CHF(0)); |
| 386 |
– |
else if (l[1][1] < my) |
| 387 |
– |
quads &= ~(CHF(3)|CHF(2)); |
| 388 |
– |
tp->flgs |= quads; /* mark quadrants for update */ |
| 389 |
– |
/* climb the branches */ |
| 390 |
– |
for (i = 0; i < 4; i++) |
| 391 |
– |
if (tp->flgs & BRF(i) && quads & CHF(i)) |
| 392 |
– |
redraw(tp->k[i].b, i&01 ? mx : x0, i&02 ? my : y0, |
| 393 |
– |
i&01 ? x1 : mx, i&02 ? y1 : my, l); |
| 394 |
– |
} |
| 395 |
– |
|
| 396 |
– |
|
| 397 |
– |
static |
| 398 |
– |
update(ca, tp, x0, y0, x1, y1) /* update tree display as needed */ |
| 399 |
– |
BYTE ca[3]; /* returned average color */ |
| 400 |
– |
register RTREE *tp; |
| 401 |
– |
int x0, y0, x1, y1; |
| 402 |
– |
{ |
| 403 |
– |
int csm[3], nc; |
| 404 |
– |
register BYTE *cp; |
| 405 |
– |
BYTE rgb[3]; |
| 406 |
– |
int gaps = 0; |
| 407 |
– |
int mx, my; |
| 408 |
– |
register int i; |
| 409 |
– |
/* compute midpoint */ |
| 410 |
– |
mx = (x0 + x1) >> 1; |
| 411 |
– |
my = (y0 + y1) >> 1; |
| 412 |
– |
csm[0] = csm[1] = csm[2] = nc = 0; |
| 413 |
– |
/* do leaves first */ |
| 414 |
– |
for (i = 0; i < 4; i++) { |
| 415 |
– |
if (!(tp->flgs & CHF(i))) |
| 416 |
– |
continue; |
| 417 |
– |
if (tp->flgs & LFF(i)) { |
| 418 |
– |
dev_paintr(cp=qtL.rgb[tp->k[i].li], |
| 419 |
– |
i&01 ? mx : x0, i&02 ? my : y0, |
| 420 |
– |
i&01 ? x1 : mx, i&02 ? y1 : my); |
| 421 |
– |
csm[0] += cp[0]; csm[1] += cp[1]; csm[2] += cp[2]; |
| 422 |
– |
nc++; |
| 423 |
– |
} else if (!(tp->flgs & BRF(i))) |
| 424 |
– |
gaps |= 1<<i; /* empty stem */ |
| 425 |
– |
} |
| 426 |
– |
/* now do branches */ |
| 427 |
– |
for (i = 0; i < 4; i++) |
| 428 |
– |
if ((tp->flgs & CHBRF(i)) == CHBRF(i)) { |
| 429 |
– |
update(rgb, tp->k[i].b, i&01 ? mx : x0, i&02 ? my : y0, |
| 430 |
– |
i&01 ? x1 : mx, i&02 ? y1 : my); |
| 431 |
– |
csm[0] += rgb[0]; csm[1] += rgb[1]; csm[2] += rgb[2]; |
| 432 |
– |
nc++; |
| 433 |
– |
} |
| 434 |
– |
if (nc > 1) { |
| 435 |
– |
ca[0] = csm[0]/nc; ca[1] = csm[1]/nc; ca[2] = csm[2]/nc; |
| 436 |
– |
} else { |
| 437 |
– |
ca[0] = csm[0]; ca[1] = csm[1]; ca[2] = csm[2]; |
| 438 |
– |
} |
| 439 |
– |
/* fill in gaps with average */ |
| 440 |
– |
for (i = 0; gaps && i < 4; gaps >>= 1, i++) |
| 441 |
– |
if (gaps & 01) |
| 442 |
– |
dev_paintr(ca, i&01 ? mx : x0, i&02 ? my : y0, |
| 443 |
– |
i&01 ? x1 : mx, i&02 ? y1 : my); |
| 444 |
– |
tp->flgs &= ~CH_ANY; /* all done */ |
| 445 |
– |
} |
| 446 |
– |
|
| 447 |
– |
|
| 448 |
– |
qtRedraw(x0, y0, x1, y1) /* redraw part or all of our screen */ |
| 449 |
– |
int x0, y0, x1, y1; |
| 450 |
– |
{ |
| 451 |
– |
int lim[2][2]; |
| 452 |
– |
|
| 453 |
– |
if (is_stump(&qtrunk)) |
| 454 |
– |
return; |
| 455 |
– |
if (!qtMapLeaves((lim[0][0]=x0) <= 0 & (lim[1][0]=y0) <= 0 & |
| 456 |
– |
(lim[0][1]=x1) >= odev.hres-1 & (lim[1][1]=y1) >= odev.vres-1)) |
| 457 |
– |
return; |
| 458 |
– |
redraw(&qtrunk, 0, 0, odev.hres, odev.vres, lim); |
| 459 |
– |
} |
| 460 |
– |
|
| 461 |
– |
|
| 462 |
– |
qtUpdate() /* update our tree display */ |
| 463 |
– |
{ |
| 464 |
– |
BYTE ca[3]; |
| 465 |
– |
|
| 466 |
– |
if (is_stump(&qtrunk)) |
| 467 |
– |
return; |
| 468 |
– |
if (!qtMapLeaves(0)) |
| 469 |
– |
return; |
| 470 |
– |
update(ca, &qtrunk, 0, 0, odev.hres, odev.vres); |
| 423 |
|
} |
