| 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" |
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gregl |
3.5 |
#include "paths.h" |
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gregl |
3.1 |
#include "random.h" |
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gwlarson |
3.16 |
VIEWPOINT myeye; /* target view position */ |
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| 18 |
gwlarson |
3.19 |
struct gclim { |
| 19 |
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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 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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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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register FLOAT *v; |
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register int i; |
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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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} |
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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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{ |
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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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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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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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} |
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mult = gp[g = gcl->gc.w>>1]; |
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if (gcl->gc.w&1) |
| 65 |
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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]]) / |
| 70 |
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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]]) / |
| 73 |
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ab[hdwg1[gcl->gc.w]]; |
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for (i = 0; i < 2; i++) { |
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g = ((gcl->gc.w>>1)+i+1)%3; |
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wg = gp[g] + mult*ab[g]; |
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d = mult*gcl->erg[i]; |
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if (d < 0.) d = -d; |
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if (wg - d < gcl->gmin[i]) |
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gcl->gmin[i] = wg - d; |
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if (wg + d > gcl->gmax[i]) |
| 82 |
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gcl->gmax[i] = wg + d; |
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} |
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} |
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static int |
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clipeyelim(rrng, gcl) /* clip eye limits to grid cell */ |
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register short rrng[2][2]; |
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register struct gclim *gcl; |
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{ |
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int incell = 1; |
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register int i; |
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for (i = 0; i < 2; i++) { |
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if (gcl->gmin[i] < gcl->gc.i[i]) |
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gcl->gmin[i] = gcl->gc.i[i]; |
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if (gcl->gmax[i] > gcl->gc.i[i]+1) |
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gcl->gmax[i] = gcl->gc.i[i]+1; |
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if ((incell &= gcl->gmax[i] > gcl->gmin[i])) { |
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rrng[i][0] = 256.*(gcl->gmin[i] - gcl->gc.i[i]) + |
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(1.-FTINY); |
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rrng[i][1] = 256.*(gcl->gmax[i] - gcl->gc.i[i]) + |
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(1.-FTINY) - rrng[i][0]; |
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incell &= rrng[i][1] > 0; |
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} |
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} |
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return(incell); |
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} |
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| 111 |
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gregl |
3.1 |
packrays(rod, p) /* pack ray origins and directions */ |
| 113 |
gwlarson |
3.15 |
register float *rod; |
| 114 |
gregl |
3.1 |
register PACKET *p; |
| 115 |
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{ |
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gwlarson |
3.19 |
#define gp ro |
| 117 |
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#ifdef DEBUG |
| 118 |
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double dist2sum = 0.; |
| 119 |
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FVECT vt; |
| 120 |
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#endif |
| 121 |
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int nretries = p->nr + 2; |
| 122 |
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struct gclim eyelim; |
| 123 |
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short rrng0[2][2], rrng1[2][2]; |
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int useyelim; |
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gregl |
3.3 |
GCOORD gc[2]; |
| 126 |
gwlarson |
3.19 |
FVECT ro, rd; |
| 127 |
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double d; |
| 128 |
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register int i; |
| 129 |
gregl |
3.1 |
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| 130 |
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if (!hdbcoord(gc, hdlist[p->hd], p->bi)) |
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error(CONSISTENCY, "bad beam index in packrays"); |
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gwlarson |
3.19 |
if ((useyelim = myeye.rng > FTINY)) { |
| 133 |
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initeyelim(&eyelim, p->hd, gc); |
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gp[gc[1].w>>1] = gc[1].w&1 ? |
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hdlist[p->hd]->grid[gc[1].w>>1] : 0; |
| 136 |
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gp[hdwg0[gc[1].w]] = gc[1].i[0]; |
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gp[hdwg1[gc[1].w]] = gc[1].i[1]; |
| 138 |
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groweyelim(&eyelim, gp); |
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gp[hdwg0[gc[1].w]]++; |
| 140 |
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gp[hdwg1[gc[1].w]]++; |
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groweyelim(&eyelim, gp); |
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useyelim &= clipeyelim(rrng0, &eyelim); |
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} |
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for (i = 0; i < p->nr; i++) { |
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retry: |
| 146 |
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if (useyelim) { |
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p->ra[i].r[0][0] = (int)(frandom()*rrng0[0][1]) |
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+ rrng0[0][0]; |
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p->ra[i].r[0][1] = (int)(frandom()*rrng0[1][1]) |
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+ rrng0[1][0]; |
| 151 |
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initeyelim(&eyelim, p->hd, gc+1); |
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gp[gc[0].w>>1] = gc[0].w&1 ? |
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hdlist[p->hd]->grid[gc[0].w>>1] : 0; |
| 154 |
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gp[hdwg0[gc[0].w]] = gc[0].i[0] + |
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(1./256.)*(p->ra[i].r[0][0]+.5); |
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gp[hdwg1[gc[0].w]] = gc[0].i[1] + |
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(1./256.)*(p->ra[i].r[0][1]+.5); |
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groweyelim(&eyelim, gp); |
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if (!clipeyelim(rrng1, &eyelim)) { |
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useyelim &= nretries-- > 0; |
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#ifdef DEBUG |
| 162 |
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if (!useyelim) |
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error(WARNING, "exceeded retry limit in packrays"); |
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#endif |
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goto retry; |
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} |
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p->ra[i].r[1][0] = (int)(frandom()*rrng1[0][1]) |
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+ rrng1[0][0]; |
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p->ra[i].r[1][1] = (int)(frandom()*rrng1[1][1]) |
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+ rrng1[1][0]; |
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} else { |
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p->ra[i].r[0][0] = frandom() * 256.; |
| 173 |
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p->ra[i].r[0][1] = frandom() * 256.; |
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p->ra[i].r[1][0] = frandom() * 256.; |
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p->ra[i].r[1][1] = frandom() * 256.; |
| 176 |
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} |
| 177 |
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d = hdray(ro, rd, hdlist[p->hd], gc, p->ra[i].r); |
| 178 |
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#ifdef DEBUG |
| 179 |
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VSUM(vt, ro, rd, d); |
| 180 |
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dist2sum += dist2line(myeye.vpt, ro, vt); |
| 181 |
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#endif |
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gregl |
3.1 |
if (p->offset != NULL) { |
| 183 |
gwlarson |
3.16 |
if (!vdef(OBSTRUCTIONS)) |
| 184 |
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d *= frandom(); /* random offset */ |
| 185 |
gregl |
3.8 |
VSUM(ro, ro, rd, d); /* advance ray */ |
| 186 |
gwlarson |
3.19 |
p->offset[i] = d; |
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gregl |
3.1 |
} |
| 188 |
gwlarson |
3.19 |
VCOPY(rod, ro); |
| 189 |
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rod += 3; |
| 190 |
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VCOPY(rod, rd); |
| 191 |
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rod += 3; |
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gregl |
3.1 |
} |
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gwlarson |
3.16 |
#ifdef DEBUG |
| 194 |
gwlarson |
3.19 |
fprintf(stderr, "RMS distance = %f\n", sqrt(dist2sum/p->nr)); |
| 195 |
gwlarson |
3.16 |
#endif |
| 196 |
gwlarson |
3.19 |
#undef gp |
| 197 |
gregl |
3.1 |
} |
| 198 |
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| 199 |
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| 200 |
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donerays(p, rvl) /* encode finished ray computations */ |
| 201 |
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register PACKET *p; |
| 202 |
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register float *rvl; |
| 203 |
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{ |
| 204 |
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double d; |
| 205 |
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register int i; |
| 206 |
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| 207 |
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for (i = 0; i < p->nr; i++) { |
| 208 |
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setcolr(p->ra[i].v, rvl[0], rvl[1], rvl[2]); |
| 209 |
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d = rvl[3]; |
| 210 |
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if (p->offset != NULL) |
| 211 |
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d += p->offset[i]; |
| 212 |
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p->ra[i].d = hdcode(hdlist[p->hd], d); |
| 213 |
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rvl += 4; |
| 214 |
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} |
| 215 |
gregl |
3.4 |
p->nc += p->nr; |
| 216 |
gregl |
3.5 |
} |
| 217 |
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| 218 |
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| 219 |
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int |
| 220 |
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done_rtrace() /* clean up and close rtrace calculation */ |
| 221 |
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{ |
| 222 |
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int status; |
| 223 |
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/* already closed? */ |
| 224 |
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if (!nprocs) |
| 225 |
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return; |
| 226 |
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/* flush beam queue */ |
| 227 |
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done_packets(flush_queue()); |
| 228 |
gregl |
3.7 |
/* sync holodeck */ |
| 229 |
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hdsync(NULL, 1); |
| 230 |
gregl |
3.5 |
/* close rtrace */ |
| 231 |
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if ((status = end_rtrace())) |
| 232 |
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error(WARNING, "bad exit status from rtrace"); |
| 233 |
gregl |
3.9 |
if (vdef(REPORT)) { /* report time */ |
| 234 |
gregl |
3.10 |
eputs("rtrace process closed\n"); |
| 235 |
gregl |
3.5 |
report(0); |
| 236 |
gregl |
3.9 |
} |
| 237 |
gregl |
3.5 |
return(status); /* return status */ |
| 238 |
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} |
| 239 |
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| 240 |
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| 241 |
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new_rtrace() /* restart rtrace calculation */ |
| 242 |
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{ |
| 243 |
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char combuf[128]; |
| 244 |
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| 245 |
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if (nprocs > 0) /* already running? */ |
| 246 |
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return; |
| 247 |
gregl |
3.6 |
starttime = time(NULL); /* reset start time and counts */ |
| 248 |
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npacksdone = nraysdone = 0L; |
| 249 |
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if (vdef(TIME)) /* reset end time */ |
| 250 |
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endtime = starttime + vflt(TIME)*3600. + .5; |
| 251 |
gregl |
3.5 |
if (vdef(RIF)) { /* rerun rad to update octree */ |
| 252 |
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sprintf(combuf, "rad -v 0 -s -w %s", vval(RIF)); |
| 253 |
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if (system(combuf)) |
| 254 |
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error(WARNING, "error running rad"); |
| 255 |
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} |
| 256 |
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if (start_rtrace() < 1) /* start rtrace */ |
| 257 |
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error(WARNING, "cannot restart rtrace"); |
| 258 |
gregl |
3.9 |
else if (vdef(REPORT)) { |
| 259 |
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eputs("rtrace process restarted\n"); |
| 260 |
gregl |
3.5 |
report(0); |
| 261 |
gregl |
3.9 |
} |
| 262 |
gregl |
3.5 |
} |
| 263 |
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| 264 |
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| 265 |
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getradfile() /* run rad and get needed variables */ |
| 266 |
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{ |
| 267 |
gwlarson |
3.12 |
static short mvar[] = {OCTREE,EYESEP,-1}; |
| 268 |
gregl |
3.5 |
static char tf1[] = TEMPLATE; |
| 269 |
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char tf2[64]; |
| 270 |
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char combuf[256]; |
| 271 |
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char *pippt; |
| 272 |
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register int i; |
| 273 |
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register char *cp; |
| 274 |
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/* check if rad file specified */ |
| 275 |
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if (!vdef(RIF)) |
| 276 |
gregl |
3.11 |
return(0); |
| 277 |
gregl |
3.5 |
/* create rad command */ |
| 278 |
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mktemp(tf1); |
| 279 |
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sprintf(tf2, "%s.rif", tf1); |
| 280 |
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sprintf(combuf, |
| 281 |
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"rad -v 0 -s -e -w %s OPTFILE=%s | egrep '^[ \t]*(NOMATCH", |
| 282 |
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vval(RIF), tf1); |
| 283 |
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cp = combuf; |
| 284 |
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while (*cp){ |
| 285 |
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if (*cp == '|') pippt = cp; |
| 286 |
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cp++; |
| 287 |
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} /* match unset variables */ |
| 288 |
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for (i = 0; mvar[i] >= 0; i++) |
| 289 |
|
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if (!vdef(mvar[i])) { |
| 290 |
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*cp++ = '|'; |
| 291 |
|
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strcpy(cp, vnam(mvar[i])); |
| 292 |
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while (*cp) cp++; |
| 293 |
|
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pippt = NULL; |
| 294 |
|
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} |
| 295 |
|
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if (pippt != NULL) |
| 296 |
|
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strcpy(pippt, "> /dev/null"); /* nothing to match */ |
| 297 |
|
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else |
| 298 |
|
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sprintf(cp, ")[ \t]*=' > %s", tf2); |
| 299 |
gwlarson |
3.13 |
#ifdef DEBUG |
| 300 |
|
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wputs(combuf); wputs("\n"); |
| 301 |
|
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#endif |
| 302 |
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system(combuf); /* ignore exit code */ |
| 303 |
gregl |
3.5 |
if (pippt == NULL) { |
| 304 |
|
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loadvars(tf2); /* load variables */ |
| 305 |
|
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unlink(tf2); |
| 306 |
|
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} |
| 307 |
|
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rtargc += wordfile(rtargv+rtargc, tf1); /* get rtrace options */ |
| 308 |
|
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unlink(tf1); /* clean up */ |
| 309 |
gregl |
3.11 |
return(1); |
| 310 |
gregl |
3.6 |
} |
| 311 |
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| 312 |
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| 313 |
|
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report(t) /* report progress so far */ |
| 314 |
|
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time_t t; |
| 315 |
|
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{ |
| 316 |
|
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static time_t seconds2go = 1000000; |
| 317 |
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| 318 |
|
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if (t == 0L) |
| 319 |
|
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t = time(NULL); |
| 320 |
|
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sprintf(errmsg, "%ld packets (%ld rays) done after %.2f hours\n", |
| 321 |
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npacksdone, nraysdone, (t-starttime)/3600.); |
| 322 |
|
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eputs(errmsg); |
| 323 |
|
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if (seconds2go == 1000000) |
| 324 |
|
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seconds2go = vdef(REPORT) ? (long)(vflt(REPORT)*60. + .5) : 0L; |
| 325 |
|
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if (seconds2go) |
| 326 |
|
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reporttime = t + seconds2go; |
| 327 |
gregl |
3.1 |
} |
