| 1 |
gwlarson |
3.12 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
| 2 |
gregl |
3.1 |
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| 3 |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
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/* |
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* Rtrace support routines for holodeck rendering |
| 9 |
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*/ |
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| 11 |
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#include "rholo.h" |
| 12 |
gregl |
3.5 |
#include "paths.h" |
| 13 |
gregl |
3.1 |
#include "random.h" |
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| 16 |
gwlarson |
3.16 |
VIEWPOINT myeye; /* target view position */ |
| 17 |
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gwlarson |
3.19 |
struct gclim { |
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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 */ |
| 22 |
gwlarson |
3.20 |
double erg2; /* mean square eye grid range */ |
| 23 |
gwlarson |
3.19 |
double gmin[2], gmax[2]; /* grid coordinate limits */ |
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}; /* a grid coordinate range */ |
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gwlarson |
3.16 |
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| 26 |
gwlarson |
3.19 |
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static |
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gwlarson |
3.20 |
initeyelim(gcl, hp, gc) /* initialize grid coordinate limits */ |
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gwlarson |
3.19 |
register struct gclim *gcl; |
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gwlarson |
3.20 |
register HOLO *hp; |
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gwlarson |
3.19 |
GCOORD *gc; |
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{ |
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register FLOAT *v; |
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register int i; |
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gwlarson |
3.20 |
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) |
| 40 |
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gcl->erg2 += DOT(v,v); |
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gcl->erg2 *= (1./3.) * myeye.rng*myeye.rng; |
| 42 |
gwlarson |
3.19 |
} |
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gwlarson |
3.20 |
if (gc != NULL) |
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copystruct(&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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gwlarson |
3.19 |
} |
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static |
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gwlarson |
3.21 |
groweyelim(gcl, gc, r0, r1, tight) /* grow grid limits about eye point */ |
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gwlarson |
3.19 |
register struct gclim *gcl; |
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gwlarson |
3.20 |
GCOORD *gc; |
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double r0, r1; |
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gwlarson |
3.21 |
int tight; |
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gwlarson |
3.19 |
{ |
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gwlarson |
3.20 |
FVECT gp, ab; |
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gwlarson |
3.21 |
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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gwlarson |
3.20 |
i = gc->w>>1; |
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gwlarson |
3.21 |
gp[i] = gc->w&1 ? gcl->hp->grid[i] : 0; |
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gwlarson |
3.20 |
gp[hdwg0[gc->w]] = gc->i[0] + r0; |
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gp[hdwg1[gc->w]] = gc->i[1] + r1; |
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gwlarson |
3.19 |
VSUB(ab, gcl->egp, gp); |
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gwlarson |
3.21 |
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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gwlarson |
3.19 |
gcl->gmin[0] = gcl->gmin[1] = -FHUGE; |
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gcl->gmax[0] = gcl->gmax[1] = FHUGE; |
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gwlarson |
3.21 |
return; /* too close (to wall) */ |
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gwlarson |
3.19 |
} |
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gwlarson |
3.21 |
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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/* |
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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 */ |
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e = ctcoef[gi[1]]*wallpos + licoef[gi[1]]; /* y */ |
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f = wallpos*(wallpos*sqcoef[gw] + licoef[gw]) + cnst; |
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for (i = 0; i < 2; i++) { |
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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; |
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t = d; d = e; e = t; |
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gwlarson |
3.20 |
} |
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gwlarson |
3.21 |
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) { |
| 111 |
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if (gc->w>>1 == gi[i] && |
| 112 |
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(gc->w&1) ^ root[n] < gp[gc->w>>1]) { |
| 113 |
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if (gc->w&1) |
| 114 |
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gcl->gmin[i] = -FHUGE; |
| 115 |
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else |
| 116 |
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gcl->gmax[i] = FHUGE; |
| 117 |
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nex++; |
| 118 |
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continue; /* hyperbolic */ |
| 119 |
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} |
| 120 |
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if (tight) { |
| 121 |
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yex = (-2.*a*root[n] - d)/b; |
| 122 |
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if (yex < gcl->gc.i[1-i] || |
| 123 |
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yex > gcl->gc.i[1-i]+1) |
| 124 |
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continue; /* outside cell */ |
| 125 |
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} |
| 126 |
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if (root[n] < gcl->gmin[i]) |
| 127 |
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gcl->gmin[i] = root[n]; |
| 128 |
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if (root[n] > gcl->gmax[i]) |
| 129 |
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gcl->gmax[i] = root[n]; |
| 130 |
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nex++; |
| 131 |
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} |
| 132 |
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/* check local extrema */ |
| 133 |
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for (j = nex < 2 ? 2 : 0; j--; ) { |
| 134 |
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yex = gcl->gc.i[1-i] + j; |
| 135 |
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n = quadratic(root, a, b*yex+d, yex*(yex*c+e)+f); |
| 136 |
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while (n-- > 0) { |
| 137 |
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if (gc->w>>1 == gi[i] && |
| 138 |
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(gc->w&1) ^ root[n] < gp[gc->w>>1]) |
| 139 |
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continue; |
| 140 |
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if (root[n] < gcl->gmin[i]) |
| 141 |
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gcl->gmin[i] = root[n]; |
| 142 |
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if (root[n] > gcl->gmax[i]) |
| 143 |
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gcl->gmax[i] = root[n]; |
| 144 |
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} |
| 145 |
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} |
| 146 |
gwlarson |
3.19 |
} |
| 147 |
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} |
| 148 |
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| 149 |
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| 150 |
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static int |
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clipeyelim(rrng, gcl) /* clip eye limits to grid cell */ |
| 152 |
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register short rrng[2][2]; |
| 153 |
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register struct gclim *gcl; |
| 154 |
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{ |
| 155 |
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int incell = 1; |
| 156 |
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register int i; |
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| 158 |
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for (i = 0; i < 2; i++) { |
| 159 |
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if (gcl->gmin[i] < gcl->gc.i[i]) |
| 160 |
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gcl->gmin[i] = gcl->gc.i[i]; |
| 161 |
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if (gcl->gmax[i] > gcl->gc.i[i]+1) |
| 162 |
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gcl->gmax[i] = gcl->gc.i[i]+1; |
| 163 |
gwlarson |
3.20 |
if (gcl->gmax[i] > gcl->gmin[i]) { |
| 164 |
gwlarson |
3.19 |
rrng[i][0] = 256.*(gcl->gmin[i] - gcl->gc.i[i]) + |
| 165 |
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(1.-FTINY); |
| 166 |
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rrng[i][1] = 256.*(gcl->gmax[i] - gcl->gc.i[i]) + |
| 167 |
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(1.-FTINY) - rrng[i][0]; |
| 168 |
gwlarson |
3.20 |
} else |
| 169 |
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rrng[i][0] = rrng[i][1] = 0; |
| 170 |
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incell &= rrng[i][1] > 0; |
| 171 |
gwlarson |
3.19 |
} |
| 172 |
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return(incell); |
| 173 |
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} |
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| 175 |
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| 176 |
gregl |
3.1 |
packrays(rod, p) /* pack ray origins and directions */ |
| 177 |
gwlarson |
3.15 |
register float *rod; |
| 178 |
gregl |
3.1 |
register PACKET *p; |
| 179 |
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{ |
| 180 |
gwlarson |
3.21 |
#if 0 |
| 181 |
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double dist2sum = 0.; |
| 182 |
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FVECT vt; |
| 183 |
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#endif |
| 184 |
gwlarson |
3.19 |
int nretries = p->nr + 2; |
| 185 |
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struct gclim eyelim; |
| 186 |
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short rrng0[2][2], rrng1[2][2]; |
| 187 |
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int useyelim; |
| 188 |
gregl |
3.3 |
GCOORD gc[2]; |
| 189 |
gwlarson |
3.19 |
FVECT ro, rd; |
| 190 |
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double d; |
| 191 |
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register int i; |
| 192 |
gregl |
3.1 |
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| 193 |
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if (!hdbcoord(gc, hdlist[p->hd], p->bi)) |
| 194 |
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error(CONSISTENCY, "bad beam index in packrays"); |
| 195 |
gwlarson |
3.19 |
if ((useyelim = myeye.rng > FTINY)) { |
| 196 |
gwlarson |
3.20 |
initeyelim(&eyelim, hdlist[p->hd], gc); |
| 197 |
gwlarson |
3.21 |
groweyelim(&eyelim, gc+1, 0., 0., 0); |
| 198 |
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groweyelim(&eyelim, gc+1, 1., 1., 0); |
| 199 |
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useyelim = clipeyelim(rrng0, &eyelim); |
| 200 |
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#ifdef DEBUG |
| 201 |
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if (!useyelim) |
| 202 |
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error(WARNING, "no eye overlap in packrays"); |
| 203 |
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#endif |
| 204 |
gwlarson |
3.19 |
} |
| 205 |
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for (i = 0; i < p->nr; i++) { |
| 206 |
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retry: |
| 207 |
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if (useyelim) { |
| 208 |
gwlarson |
3.20 |
initeyelim(&eyelim, NULL, gc+1); |
| 209 |
gwlarson |
3.19 |
p->ra[i].r[0][0] = (int)(frandom()*rrng0[0][1]) |
| 210 |
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+ rrng0[0][0]; |
| 211 |
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p->ra[i].r[0][1] = (int)(frandom()*rrng0[1][1]) |
| 212 |
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+ rrng0[1][0]; |
| 213 |
gwlarson |
3.20 |
groweyelim(&eyelim, gc, |
| 214 |
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(1./256.)*(p->ra[i].r[0][0]+.5), |
| 215 |
gwlarson |
3.21 |
(1./256.)*(p->ra[i].r[0][1]+.5), 1); |
| 216 |
gwlarson |
3.19 |
if (!clipeyelim(rrng1, &eyelim)) { |
| 217 |
gwlarson |
3.21 |
useyelim = nretries-- > 0; |
| 218 |
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#ifdef DEBUG |
| 219 |
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if (!useyelim) |
| 220 |
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error(WARNING, |
| 221 |
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"exceeded retry limit in packrays"); |
| 222 |
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#endif |
| 223 |
gwlarson |
3.19 |
goto retry; |
| 224 |
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} |
| 225 |
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p->ra[i].r[1][0] = (int)(frandom()*rrng1[0][1]) |
| 226 |
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+ rrng1[0][0]; |
| 227 |
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p->ra[i].r[1][1] = (int)(frandom()*rrng1[1][1]) |
| 228 |
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+ rrng1[1][0]; |
| 229 |
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} else { |
| 230 |
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p->ra[i].r[0][0] = frandom() * 256.; |
| 231 |
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p->ra[i].r[0][1] = frandom() * 256.; |
| 232 |
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p->ra[i].r[1][0] = frandom() * 256.; |
| 233 |
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p->ra[i].r[1][1] = frandom() * 256.; |
| 234 |
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} |
| 235 |
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d = hdray(ro, rd, hdlist[p->hd], gc, p->ra[i].r); |
| 236 |
gwlarson |
3.21 |
#if 0 |
| 237 |
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VSUM(vt, ro, rd, d); |
| 238 |
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dist2sum += dist2line(myeye.vpt, ro, vt); |
| 239 |
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#endif |
| 240 |
gregl |
3.1 |
if (p->offset != NULL) { |
| 241 |
gwlarson |
3.16 |
if (!vdef(OBSTRUCTIONS)) |
| 242 |
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d *= frandom(); /* random offset */ |
| 243 |
gregl |
3.8 |
VSUM(ro, ro, rd, d); /* advance ray */ |
| 244 |
gwlarson |
3.19 |
p->offset[i] = d; |
| 245 |
gregl |
3.1 |
} |
| 246 |
gwlarson |
3.19 |
VCOPY(rod, ro); |
| 247 |
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rod += 3; |
| 248 |
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VCOPY(rod, rd); |
| 249 |
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rod += 3; |
| 250 |
gregl |
3.1 |
} |
| 251 |
gwlarson |
3.21 |
#if 0 |
| 252 |
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fprintf(stderr, "%f RMS (%d retries)\t", sqrt(dist2sum/p->nr), |
| 253 |
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p->nr + 2 - nretries); |
| 254 |
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#endif |
| 255 |
gregl |
3.1 |
} |
| 256 |
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| 257 |
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| 258 |
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donerays(p, rvl) /* encode finished ray computations */ |
| 259 |
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register PACKET *p; |
| 260 |
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register float *rvl; |
| 261 |
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{ |
| 262 |
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double d; |
| 263 |
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register int i; |
| 264 |
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| 265 |
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for (i = 0; i < p->nr; i++) { |
| 266 |
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setcolr(p->ra[i].v, rvl[0], rvl[1], rvl[2]); |
| 267 |
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d = rvl[3]; |
| 268 |
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if (p->offset != NULL) |
| 269 |
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d += p->offset[i]; |
| 270 |
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p->ra[i].d = hdcode(hdlist[p->hd], d); |
| 271 |
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rvl += 4; |
| 272 |
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} |
| 273 |
gregl |
3.4 |
p->nc += p->nr; |
| 274 |
gregl |
3.5 |
} |
| 275 |
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| 276 |
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| 277 |
|
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int |
| 278 |
|
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done_rtrace() /* clean up and close rtrace calculation */ |
| 279 |
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{ |
| 280 |
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int status; |
| 281 |
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/* already closed? */ |
| 282 |
|
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if (!nprocs) |
| 283 |
|
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return; |
| 284 |
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/* flush beam queue */ |
| 285 |
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done_packets(flush_queue()); |
| 286 |
gregl |
3.7 |
/* sync holodeck */ |
| 287 |
|
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hdsync(NULL, 1); |
| 288 |
gregl |
3.5 |
/* close rtrace */ |
| 289 |
|
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if ((status = end_rtrace())) |
| 290 |
|
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error(WARNING, "bad exit status from rtrace"); |
| 291 |
gregl |
3.9 |
if (vdef(REPORT)) { /* report time */ |
| 292 |
gregl |
3.10 |
eputs("rtrace process closed\n"); |
| 293 |
gregl |
3.5 |
report(0); |
| 294 |
gregl |
3.9 |
} |
| 295 |
gregl |
3.5 |
return(status); /* return status */ |
| 296 |
|
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} |
| 297 |
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| 298 |
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| 299 |
|
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new_rtrace() /* restart rtrace calculation */ |
| 300 |
|
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{ |
| 301 |
|
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char combuf[128]; |
| 302 |
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| 303 |
|
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if (nprocs > 0) /* already running? */ |
| 304 |
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return; |
| 305 |
gregl |
3.6 |
starttime = time(NULL); /* reset start time and counts */ |
| 306 |
|
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npacksdone = nraysdone = 0L; |
| 307 |
|
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if (vdef(TIME)) /* reset end time */ |
| 308 |
|
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endtime = starttime + vflt(TIME)*3600. + .5; |
| 309 |
gregl |
3.5 |
if (vdef(RIF)) { /* rerun rad to update octree */ |
| 310 |
|
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sprintf(combuf, "rad -v 0 -s -w %s", vval(RIF)); |
| 311 |
|
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if (system(combuf)) |
| 312 |
|
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error(WARNING, "error running rad"); |
| 313 |
|
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} |
| 314 |
|
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if (start_rtrace() < 1) /* start rtrace */ |
| 315 |
|
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error(WARNING, "cannot restart rtrace"); |
| 316 |
gregl |
3.9 |
else if (vdef(REPORT)) { |
| 317 |
|
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eputs("rtrace process restarted\n"); |
| 318 |
gregl |
3.5 |
report(0); |
| 319 |
gregl |
3.9 |
} |
| 320 |
gregl |
3.5 |
} |
| 321 |
|
|
|
| 322 |
|
|
|
| 323 |
|
|
getradfile() /* run rad and get needed variables */ |
| 324 |
|
|
{ |
| 325 |
gwlarson |
3.12 |
static short mvar[] = {OCTREE,EYESEP,-1}; |
| 326 |
gregl |
3.5 |
static char tf1[] = TEMPLATE; |
| 327 |
|
|
char tf2[64]; |
| 328 |
|
|
char combuf[256]; |
| 329 |
|
|
char *pippt; |
| 330 |
|
|
register int i; |
| 331 |
|
|
register char *cp; |
| 332 |
|
|
/* check if rad file specified */ |
| 333 |
|
|
if (!vdef(RIF)) |
| 334 |
gregl |
3.11 |
return(0); |
| 335 |
gregl |
3.5 |
/* create rad command */ |
| 336 |
|
|
mktemp(tf1); |
| 337 |
|
|
sprintf(tf2, "%s.rif", tf1); |
| 338 |
|
|
sprintf(combuf, |
| 339 |
|
|
"rad -v 0 -s -e -w %s OPTFILE=%s | egrep '^[ \t]*(NOMATCH", |
| 340 |
|
|
vval(RIF), tf1); |
| 341 |
|
|
cp = combuf; |
| 342 |
|
|
while (*cp){ |
| 343 |
|
|
if (*cp == '|') pippt = cp; |
| 344 |
|
|
cp++; |
| 345 |
|
|
} /* match unset variables */ |
| 346 |
|
|
for (i = 0; mvar[i] >= 0; i++) |
| 347 |
|
|
if (!vdef(mvar[i])) { |
| 348 |
|
|
*cp++ = '|'; |
| 349 |
|
|
strcpy(cp, vnam(mvar[i])); |
| 350 |
|
|
while (*cp) cp++; |
| 351 |
|
|
pippt = NULL; |
| 352 |
|
|
} |
| 353 |
|
|
if (pippt != NULL) |
| 354 |
|
|
strcpy(pippt, "> /dev/null"); /* nothing to match */ |
| 355 |
|
|
else |
| 356 |
|
|
sprintf(cp, ")[ \t]*=' > %s", tf2); |
| 357 |
gwlarson |
3.13 |
#ifdef DEBUG |
| 358 |
|
|
wputs(combuf); wputs("\n"); |
| 359 |
|
|
#endif |
| 360 |
|
|
system(combuf); /* ignore exit code */ |
| 361 |
gregl |
3.5 |
if (pippt == NULL) { |
| 362 |
|
|
loadvars(tf2); /* load variables */ |
| 363 |
|
|
unlink(tf2); |
| 364 |
|
|
} |
| 365 |
|
|
rtargc += wordfile(rtargv+rtargc, tf1); /* get rtrace options */ |
| 366 |
|
|
unlink(tf1); /* clean up */ |
| 367 |
gregl |
3.11 |
return(1); |
| 368 |
gregl |
3.6 |
} |
| 369 |
|
|
|
| 370 |
|
|
|
| 371 |
|
|
report(t) /* report progress so far */ |
| 372 |
|
|
time_t t; |
| 373 |
|
|
{ |
| 374 |
|
|
static time_t seconds2go = 1000000; |
| 375 |
|
|
|
| 376 |
|
|
if (t == 0L) |
| 377 |
|
|
t = time(NULL); |
| 378 |
|
|
sprintf(errmsg, "%ld packets (%ld rays) done after %.2f hours\n", |
| 379 |
|
|
npacksdone, nraysdone, (t-starttime)/3600.); |
| 380 |
|
|
eputs(errmsg); |
| 381 |
|
|
if (seconds2go == 1000000) |
| 382 |
|
|
seconds2go = vdef(REPORT) ? (long)(vflt(REPORT)*60. + .5) : 0L; |
| 383 |
|
|
if (seconds2go) |
| 384 |
|
|
reporttime = t + seconds2go; |
| 385 |
gregl |
3.1 |
} |
