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/* Copyright (c) 1998 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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/* |
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* Rtrace support routines for holodeck rendering |
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*/ |
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#include <time.h> |
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#include "rholo.h" |
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#include "paths.h" |
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#include "random.h" |
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HOLO *hp; /* holodeck pointer */ |
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GCOORD gc; /* grid cell */ |
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FVECT egp; /* eye grid point */ |
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double erg[2]; /* eye range in wall grid coords */ |
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double erg2; /* mean square eye grid range */ |
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double gmin[2], gmax[2]; /* grid coordinate limits */ |
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}; /* a grid coordinate range */ |
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|
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static void initeyelim(struct gclim *gcl, HOLO *hp, GCOORD *gc); |
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static void groweyelim(struct gclim *gcl, GCOORD *gc, |
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double r0, double r1, int tight); |
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static int clipeyelim(short rrng[2][2], struct gclim *gcl); |
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|
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static |
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initeyelim(gcl, hd, gc) /* initialize grid coordinate limits */ |
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register struct gclim *gcl; |
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int hd; |
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GCOORD *gc; |
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|
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static void |
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initeyelim( /* initialize grid coordinate limits */ |
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register struct gclim *gcl, |
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register HOLO *hp, |
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GCOORD *gc |
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) |
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{ |
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register FLOAT *v; |
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register RREAL *v; |
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register int i; |
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|
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gcl->hp = hdlist[hd]; |
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copystruct(&gcl->gc, gc); |
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hdgrid(gcl->egp, gcl->hp, myeye.vpt); |
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for (i = 0; i < 2; i++) { |
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v = gcl->hp->wg[((gcl->gc.w>>1)+i+1)%3]; |
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gcl->erg[i] = myeye.rng * VLEN(v); |
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gcl->gmin[i] = FHUGE; gcl->gmax[i] = -FHUGE; |
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if (hp != NULL) { |
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hdgrid(gcl->egp, gcl->hp = hp, myeye.vpt); |
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gcl->erg2 = 0; |
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for (i = 0, v = hp->wg[0]; i < 3; i++, v += 3) |
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gcl->erg2 += DOT(v,v); |
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gcl->erg2 *= (1./3.) * myeye.rng*myeye.rng; |
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} |
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if (gc != NULL) |
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gcl->gc = *gc; |
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gcl->gmin[0] = gcl->gmin[1] = FHUGE; |
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gcl->gmax[0] = gcl->gmax[1] = -FHUGE; |
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} |
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static |
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groweyelim(gcl, gp) /* grow grid limits about eye point */ |
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register struct gclim *gcl; |
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FVECT gp; |
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static void |
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groweyelim( /* grow grid limits about eye point */ |
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register struct gclim *gcl, |
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GCOORD *gc, |
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double r0, |
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double r1, |
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int tight |
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) |
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{ |
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FVECT ab; |
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double l2, d, mult, wg; |
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register int i, g; |
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|
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FVECT gp, ab; |
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double ab2, od, cfact; |
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double sqcoef[3], ctcoef[3], licoef[3], cnst; |
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int gw, gi[2]; |
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double wallpos, a, b, c, d, e, f; |
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double root[2], yex; |
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int n, i, j, nex; |
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/* point/view cone */ |
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i = gc->w>>1; |
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gp[i] = gc->w&1 ? gcl->hp->grid[i] : 0; |
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gp[hdwg0[gc->w]] = gc->i[0] + r0; |
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gp[hdwg1[gc->w]] = gc->i[1] + r1; |
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VSUB(ab, gcl->egp, gp); |
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l2 = DOT(ab,ab); |
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if (l2 <= gcl->erg[0]*gcl->erg[1]) { |
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ab2 = DOT(ab, ab); |
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gw = gcl->gc.w>>1; |
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if ((i==gw ? ab[gw]*ab[gw] : ab2) <= gcl->erg2 + FTINY) { |
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gcl->gmin[0] = gcl->gmin[1] = -FHUGE; |
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gcl->gmax[0] = gcl->gmax[1] = FHUGE; |
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return; |
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return; /* too close (to wall) */ |
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} |
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mult = gp[g = gcl->gc.w>>1]; |
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if (gcl->gc.w&1) |
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mult -= gcl->hp->grid[g]; |
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if (ab[g]*ab[g] > gcl->erg[0]*gcl->erg[1]) |
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mult /= -ab[g]; |
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else if (fabs(ab[hdwg0[gcl->gc.w]]) > fabs(ab[hdwg1[gcl->gc.w]])) |
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mult = (gcl->gc.i[0] + .5 - gp[hdwg0[gcl->gc.w]]) / |
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ab[hdwg0[gcl->gc.w]]; |
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else |
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mult = (gcl->gc.i[1] + .5 - gp[hdwg1[gcl->gc.w]]) / |
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ab[hdwg1[gcl->gc.w]]; |
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ab2 = 1./ab2; /* 1/norm2(ab) */ |
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od = DOT(gp, ab); /* origin dot direction */ |
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cfact = 1./(1. - ab2*gcl->erg2); /* tan^2 + 1 of cone angle */ |
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for (i = 0; i < 3; i++) { /* compute cone equation */ |
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sqcoef[i] = ab[i]*ab[i]*cfact*ab2 - 1.; |
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ctcoef[i] = 2.*ab[i]*ab[(i+1)%3]*cfact*ab2; |
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licoef[i] = 2.*(gp[i] - ab[i]*cfact*od*ab2); |
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} |
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cnst = cfact*od*od*ab2 - DOT(gp,gp); |
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/* |
94 |
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* CONE: sqcoef[0]*x*x + sqcoef[1]*y*y + sqcoef[2]*z*z |
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* + ctcoef[0]*x*y + ctcoef[1]*y*z + ctcoef[2]*z*x |
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* + licoef[0]*x + licoef[1]*y + licoef[2]*z + cnst == 0 |
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*/ |
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/* equation for conic section in plane */ |
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gi[0] = hdwg0[gcl->gc.w]; |
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gi[1] = hdwg1[gcl->gc.w]; |
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wallpos = gcl->gc.w&1 ? gcl->hp->grid[gw] : 0; |
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a = sqcoef[gi[0]]; /* x2 */ |
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b = ctcoef[gi[0]]; /* xy */ |
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c = sqcoef[gi[1]]; /* y2 */ |
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d = ctcoef[gw]*wallpos + licoef[gi[0]]; /* x */ |
106 |
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e = ctcoef[gi[1]]*wallpos + licoef[gi[1]]; /* y */ |
107 |
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f = wallpos*(wallpos*sqcoef[gw] + licoef[gw]) + cnst; |
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for (i = 0; i < 2; i++) { |
109 |
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g = ((gcl->gc.w>>1)+i+1)%3; |
110 |
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wg = gp[g] + mult*ab[g]; |
111 |
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d = mult*gcl->erg[i]; |
112 |
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if (d < 0.) d = -d; |
113 |
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if (wg - d < gcl->gmin[i]) |
114 |
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gcl->gmin[i] = wg - d; |
115 |
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if (wg + d > gcl->gmax[i]) |
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gcl->gmax[i] = wg + d; |
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if (i) { /* swap x and y coefficients */ |
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register double t; |
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t = a; a = c; c = t; |
112 |
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t = d; d = e; e = t; |
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} |
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nex = 0; /* check global extrema */ |
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n = quadratic(root, a*(4.*a*c-b*b), 2.*a*(2.*c*d-b*e), |
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d*(c*d-b*e) + f*b*b); |
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while (n-- > 0) { |
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if (gc->w>>1 == gi[i] && |
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(gc->w&1) ^ (root[n] < gp[gc->w>>1])) { |
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if (gc->w&1) |
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gcl->gmin[i] = -FHUGE; |
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else |
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gcl->gmax[i] = FHUGE; |
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nex++; |
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continue; /* hyperbolic */ |
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} |
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if (tight) { |
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yex = (-2.*a*root[n] - d)/b; |
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if (yex < gcl->gc.i[1-i] || |
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yex > gcl->gc.i[1-i]+1) |
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continue; /* outside cell */ |
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} |
133 |
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if (root[n] < gcl->gmin[i]) |
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gcl->gmin[i] = root[n]; |
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if (root[n] > gcl->gmax[i]) |
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gcl->gmax[i] = root[n]; |
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nex++; |
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} |
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/* check local extrema */ |
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for (j = nex < 2 ? 2 : 0; j--; ) { |
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yex = gcl->gc.i[1-i] + j; |
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n = quadratic(root, a, b*yex+d, yex*(yex*c+e)+f); |
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while (n-- > 0) { |
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if (gc->w>>1 == gi[i] && |
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(gc->w&1) ^ (root[n] < gp[gc->w>>1])) |
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continue; |
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> |
if (root[n] < gcl->gmin[i]) |
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gcl->gmin[i] = root[n]; |
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if (root[n] > gcl->gmax[i]) |
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gcl->gmax[i] = root[n]; |
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} |
152 |
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} |
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} |
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} |
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static int |
158 |
< |
clipeyelim(rrng, gcl) /* clip eye limits to grid cell */ |
159 |
< |
register short rrng[2][2]; |
160 |
< |
register struct gclim *gcl; |
158 |
> |
clipeyelim( /* clip eye limits to grid cell */ |
159 |
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register short rrng[2][2], |
160 |
> |
register struct gclim *gcl |
161 |
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) |
162 |
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{ |
163 |
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int incell = 1; |
164 |
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register int i; |
168 |
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gcl->gmin[i] = gcl->gc.i[i]; |
169 |
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if (gcl->gmax[i] > gcl->gc.i[i]+1) |
170 |
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gcl->gmax[i] = gcl->gc.i[i]+1; |
171 |
< |
if ((incell &= gcl->gmax[i] > gcl->gmin[i])) { |
171 |
> |
if (gcl->gmax[i] > gcl->gmin[i]) { |
172 |
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rrng[i][0] = 256.*(gcl->gmin[i] - gcl->gc.i[i]) + |
173 |
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(1.-FTINY); |
174 |
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rrng[i][1] = 256.*(gcl->gmax[i] - gcl->gc.i[i]) + |
175 |
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(1.-FTINY) - rrng[i][0]; |
176 |
< |
incell &= rrng[i][1] > 0; |
177 |
< |
} |
176 |
> |
} else |
177 |
> |
rrng[i][0] = rrng[i][1] = 0; |
178 |
> |
incell &= rrng[i][1] > 0; |
179 |
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} |
180 |
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return(incell); |
181 |
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} |
182 |
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184 |
< |
packrays(rod, p) /* pack ray origins and directions */ |
185 |
< |
register float *rod; |
186 |
< |
register PACKET *p; |
184 |
> |
extern void |
185 |
> |
packrays( /* pack ray origins and directions */ |
186 |
> |
register float *rod, |
187 |
> |
register PACKET *p |
188 |
> |
) |
189 |
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{ |
190 |
< |
#define gp ro |
191 |
< |
#ifdef DEBUG |
118 |
< |
double dist2sum = 0.; |
190 |
> |
#if 0 |
191 |
> |
double dist2sum = 0.; |
192 |
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FVECT vt; |
193 |
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#endif |
194 |
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int nretries = p->nr + 2; |
203 |
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if (!hdbcoord(gc, hdlist[p->hd], p->bi)) |
204 |
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error(CONSISTENCY, "bad beam index in packrays"); |
205 |
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if ((useyelim = myeye.rng > FTINY)) { |
206 |
< |
initeyelim(&eyelim, p->hd, gc); |
207 |
< |
gp[gc[1].w>>1] = gc[1].w&1 ? |
208 |
< |
hdlist[p->hd]->grid[gc[1].w>>1] : 0; |
209 |
< |
gp[hdwg0[gc[1].w]] = gc[1].i[0]; |
210 |
< |
gp[hdwg1[gc[1].w]] = gc[1].i[1]; |
211 |
< |
groweyelim(&eyelim, gp); |
212 |
< |
gp[hdwg0[gc[1].w]]++; |
213 |
< |
gp[hdwg1[gc[1].w]]++; |
141 |
< |
groweyelim(&eyelim, gp); |
142 |
< |
useyelim &= clipeyelim(rrng0, &eyelim); |
206 |
> |
initeyelim(&eyelim, hdlist[p->hd], gc); |
207 |
> |
groweyelim(&eyelim, gc+1, 0., 0., 0); |
208 |
> |
groweyelim(&eyelim, gc+1, 1., 1., 0); |
209 |
> |
useyelim = clipeyelim(rrng0, &eyelim); |
210 |
> |
#ifdef DEBUG |
211 |
> |
if (!useyelim) |
212 |
> |
error(WARNING, "no eye overlap in packrays"); |
213 |
> |
#endif |
214 |
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} |
215 |
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for (i = 0; i < p->nr; i++) { |
216 |
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retry: |
217 |
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if (useyelim) { |
218 |
+ |
initeyelim(&eyelim, NULL, gc+1); |
219 |
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p->ra[i].r[0][0] = (int)(frandom()*rrng0[0][1]) |
220 |
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+ rrng0[0][0]; |
221 |
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p->ra[i].r[0][1] = (int)(frandom()*rrng0[1][1]) |
222 |
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+ rrng0[1][0]; |
223 |
< |
initeyelim(&eyelim, p->hd, gc+1); |
224 |
< |
gp[gc[0].w>>1] = gc[0].w&1 ? |
225 |
< |
hdlist[p->hd]->grid[gc[0].w>>1] : 0; |
154 |
< |
gp[hdwg0[gc[0].w]] = gc[0].i[0] + |
155 |
< |
(1./256.)*(p->ra[i].r[0][0]+.5); |
156 |
< |
gp[hdwg1[gc[0].w]] = gc[0].i[1] + |
157 |
< |
(1./256.)*(p->ra[i].r[0][1]+.5); |
158 |
< |
groweyelim(&eyelim, gp); |
223 |
> |
groweyelim(&eyelim, gc, |
224 |
> |
(1./256.)*(p->ra[i].r[0][0]+.5), |
225 |
> |
(1./256.)*(p->ra[i].r[0][1]+.5), 1); |
226 |
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if (!clipeyelim(rrng1, &eyelim)) { |
227 |
< |
useyelim &= nretries-- > 0; |
227 |
> |
useyelim = nretries-- > 0; |
228 |
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#ifdef DEBUG |
229 |
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if (!useyelim) |
230 |
< |
error(WARNING, "exceeded retry limit in packrays"); |
230 |
> |
error(WARNING, |
231 |
> |
"exceeded retry limit in packrays"); |
232 |
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#endif |
233 |
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goto retry; |
234 |
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} |
243 |
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p->ra[i].r[1][1] = frandom() * 256.; |
244 |
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} |
245 |
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d = hdray(ro, rd, hdlist[p->hd], gc, p->ra[i].r); |
246 |
< |
#ifdef DEBUG |
246 |
> |
#if 0 |
247 |
|
VSUM(vt, ro, rd, d); |
248 |
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dist2sum += dist2line(myeye.vpt, ro, vt); |
249 |
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#endif |
258 |
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VCOPY(rod, rd); |
259 |
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rod += 3; |
260 |
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} |
261 |
< |
#ifdef DEBUG |
262 |
< |
fprintf(stderr, "RMS distance = %f\n", sqrt(dist2sum/p->nr)); |
261 |
> |
#if 0 |
262 |
> |
fprintf(stderr, "%f RMS (%d retries)\t", sqrt(dist2sum/p->nr), |
263 |
> |
p->nr + 2 - nretries); |
264 |
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#endif |
196 |
– |
#undef gp |
265 |
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} |
266 |
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|
267 |
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|
268 |
< |
donerays(p, rvl) /* encode finished ray computations */ |
269 |
< |
register PACKET *p; |
270 |
< |
register float *rvl; |
268 |
> |
extern void |
269 |
> |
donerays( /* encode finished ray computations */ |
270 |
> |
register PACKET *p, |
271 |
> |
register float *rvl |
272 |
> |
) |
273 |
|
{ |
274 |
|
double d; |
275 |
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register int i; |
286 |
|
} |
287 |
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|
288 |
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|
289 |
< |
int |
290 |
< |
done_rtrace() /* clean up and close rtrace calculation */ |
289 |
> |
extern int |
290 |
> |
done_rtrace(void) /* clean up and close rtrace calculation */ |
291 |
|
{ |
292 |
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int status; |
293 |
|
/* already closed? */ |
294 |
|
if (!nprocs) |
295 |
< |
return; |
295 |
> |
return(0); |
296 |
|
/* flush beam queue */ |
297 |
|
done_packets(flush_queue()); |
298 |
|
/* sync holodeck */ |
308 |
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} |
309 |
|
|
310 |
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|
311 |
< |
new_rtrace() /* restart rtrace calculation */ |
311 |
> |
extern void |
312 |
> |
new_rtrace(void) /* restart rtrace calculation */ |
313 |
|
{ |
314 |
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char combuf[128]; |
315 |
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|
333 |
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} |
334 |
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|
335 |
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|
336 |
< |
getradfile() /* run rad and get needed variables */ |
336 |
> |
extern int |
337 |
> |
getradfile(void) /* run rad and get needed variables */ |
338 |
|
{ |
339 |
|
static short mvar[] = {OCTREE,EYESEP,-1}; |
340 |
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static char tf1[] = TEMPLATE; |
341 |
|
char tf2[64]; |
342 |
|
char combuf[256]; |
343 |
< |
char *pippt; |
343 |
> |
char *pippt = NULL; |
344 |
|
register int i; |
345 |
|
register char *cp; |
346 |
|
/* check if rad file specified */ |
365 |
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pippt = NULL; |
366 |
|
} |
367 |
|
if (pippt != NULL) |
368 |
< |
strcpy(pippt, "> /dev/null"); /* nothing to match */ |
368 |
> |
strcpy(pippt, "> " NULL_DEVICE); /* nothing to match */ |
369 |
|
else |
370 |
|
sprintf(cp, ")[ \t]*=' > %s", tf2); |
371 |
|
#ifdef DEBUG |
376 |
|
loadvars(tf2); /* load variables */ |
377 |
|
unlink(tf2); |
378 |
|
} |
379 |
< |
rtargc += wordfile(rtargv+rtargc, tf1); /* get rtrace options */ |
379 |
> |
/* get rtrace options */ |
380 |
> |
rtargc += wordfile(rtargv+rtargc, MAXRTARGC-rtargc, tf1); |
381 |
|
unlink(tf1); /* clean up */ |
382 |
|
return(1); |
383 |
|
} |
384 |
|
|
385 |
|
|
386 |
< |
report(t) /* report progress so far */ |
387 |
< |
time_t t; |
386 |
> |
extern void |
387 |
> |
report( /* report progress so far */ |
388 |
> |
time_t t |
389 |
> |
) |
390 |
|
{ |
391 |
|
static time_t seconds2go = 1000000; |
392 |
|
|