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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 |
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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 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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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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static RTREE * |
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newtwig() /* allocate a twig */ |
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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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#define LEAFSIZ (3*sizeof(float)+sizeof(int4)+\ |
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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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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 = (int4 *)(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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} |
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#define DCSCALE 11585.2 /* (1<<13)*sqrt(2) */ |
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#define FXNEG 01 |
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#define FYNEG 02 |
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#define FZNEG 04 |
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#define F1X 010 |
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#define F2Z 020 |
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#define F1SFT 5 |
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#define F2SFT 18 |
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#define FMASK 0x1fff |
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|
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static int4 |
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encodedir(dv) /* encode a normalized direction vector */ |
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FVECT dv; |
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{ |
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register int4 dc = 0; |
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int cd[3], cm; |
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register int i; |
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|
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for (i = 0; i < 3; i++) |
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if (dv[i] < 0.) { |
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cd[i] = dv[i] * -DCSCALE; |
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dc |= 1<<i; |
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} else |
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cd[i] = dv[i] * DCSCALE; |
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if (cd[0] <= cd[1]) { |
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dc |= F1X | cd[0] << F1SFT; |
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cm = cd[1]; |
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} else { |
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dc |= cd[1] << F1SFT; |
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cm = cd[0]; |
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} |
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if (cd[2] <= cm) |
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dc |= F2Z | cd[2] << F2SFT; |
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else |
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dc |= cm << F2SFT; |
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return(dc); |
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} |
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|
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|
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static |
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decodedir(dv, dc) /* decode a normalized direction vector */ |
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register FVECT dv; /* returned */ |
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register int4 dc; |
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{ |
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double d1, d2, der; |
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|
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d1 = ((dc>>F1SFT & FMASK)+.5)/DCSCALE; |
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d2 = ((dc>>F2SFT & FMASK)+.5)/DCSCALE; |
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der = sqrt(1. - d1*d1 - d2*d2); |
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if (dc & F1X) { |
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dv[0] = d1; |
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if (dc & F2Z) { dv[1] = der; dv[2] = d2; } |
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else { dv[1] = d2; dv[2] = der; } |
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} else { |
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dv[1] = d1; |
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if (dc & F2Z) { dv[0] = der; dv[2] = d2; } |
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else { dv[0] = d2; dv[2] = der; } |
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} |
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if (dc & FXNEG) dv[0] = -dv[0]; |
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if (dc & FYNEG) dv[1] = -dv[1]; |
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if (dc & FZNEG) dv[2] = -dv[2]; |
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} |
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|
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|
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static double |
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dir2diff(dc1, dc2) /* relative radians^2 between directions */ |
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int4 dc1, dc2; |
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{ |
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FVECT v1, v2; |
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|
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decodedir(v1, dc1); |
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decodedir(v2, dc2); |
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|
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return(2. - 2.*DOT(v1,v2)); |
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} |
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|
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|
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static double |
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fdir2diff(dc1, v2) /* relative radians^2 between directions */ |
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int4 dc1; |
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register FVECT v2; |
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{ |
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FVECT v1; |
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|
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decodedir(v1, dc1); |
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|
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return(2. - 2.*DOT(v1,v2)); |
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} |
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|
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|
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int |
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qtFindLeaf(x, y) /* find closest leaf to (x,y) */ |
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int x, y; |
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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; |
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double d2; |
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int x, y, mx, my; |
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double z; |
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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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/* 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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return(-1); /* 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 addleaf"); |
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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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return(0); /* 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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tp->flgs |= CHLFF(q); |
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break; |
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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? */ |
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if (x1-x0 <= qtMinNodesiz || y1-y0 <= qtMinNodesiz) { |
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if (z > (1.-qtDepthEps)*ip[2]) /* who is closer? */ |
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return; /* old one is */ |
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tp->k[q].li = li; /* new one is */ |
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if (y1-y0 <= qtMinNodesiz || x1-x0 <= qtMinNodesiz) { |
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> |
if (z > (1.+qtDepthEps)*ip[2]) |
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return(0); /* old one closer */ |
393 |
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if (z >= (1.-qtDepthEps)*ip[2] && |
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fdir2diff(qtL.wd[lo], vd) < d2) |
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return(0); /* old one better */ |
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tp->k[q].li = li; /* else new one is */ |
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tp->flgs |= CHF(q); |
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break; |
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} |
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my = ip[1] * odev.vres; |
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if (mx >= (x0 + x1) >> 1) q |= 01; |
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if (my >= (y0 + y1) >> 1) q |= 02; |
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tp->flgs = CH_ANY|LFF(q); /* all new */ |
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tp->k[q].li = lo; |
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tp->flgs |= LFF(q)|CH_ANY; /* all new */ |
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} |
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return(1); /* done */ |
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} |
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|
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dev_value(c, p) /* add a pixel value to our quadtree */ |
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> |
dev_value(c, p, v) /* add a pixel value to our quadtree */ |
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COLR c; |
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< |
FVECT p; |
417 |
> |
FVECT p, v; |
418 |
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{ |
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register int li; |
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li = newleaf(); |
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VCOPY(qtL.wp[li], p); |
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qtL.wd[li] = encodedir(v); |
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tmCvColrs(&qtL.brt[li], qtL.chr[li], c, 1); |
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< |
addleaf(li); |
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> |
if (!addleaf(li)) |
426 |
> |
ungetleaf(li); |
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} |
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