| 1 |
gwlarson |
3.12 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */
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| 2 |
gregl |
3.1 |
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| 3 |
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#ifndef lint
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| 4 |
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static char SCCSid[] = "$SunId$ SGI";
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| 5 |
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#endif
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| 6 |
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| 7 |
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/*
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| 8 |
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* Rtrace support routines for holodeck rendering
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| 9 |
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*/
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| 10 |
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| 11 |
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#include "rholo.h"
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| 12 |
gregl |
3.5 |
#include "paths.h"
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| 13 |
gregl |
3.1 |
#include "random.h"
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| 14 |
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| 15 |
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| 16 |
gwlarson |
3.16 |
VIEWPOINT myeye; /* target view position */
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| 17 |
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| 18 |
gwlarson |
3.19 |
struct gclim {
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| 19 |
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HOLO *hp; /* holodeck pointer */
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| 20 |
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GCOORD gc; /* grid cell */
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| 21 |
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FVECT egp; /* eye grid point */
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| 22 |
gwlarson |
3.20 |
double erg2; /* mean square eye grid range */
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| 23 |
gwlarson |
3.19 |
double gmin[2], gmax[2]; /* grid coordinate limits */
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| 24 |
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}; /* a grid coordinate range */
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| 25 |
gwlarson |
3.16 |
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| 26 |
gwlarson |
3.19 |
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| 27 |
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static
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| 28 |
gwlarson |
3.20 |
initeyelim(gcl, hp, gc) /* initialize grid coordinate limits */
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| 29 |
gwlarson |
3.19 |
register struct gclim *gcl;
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| 30 |
gwlarson |
3.20 |
register HOLO *hp;
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| 31 |
gwlarson |
3.19 |
GCOORD *gc;
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| 32 |
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{
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| 33 |
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register FLOAT *v;
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| 34 |
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register int i;
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| 35 |
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| 36 |
gwlarson |
3.20 |
if (hp != NULL) {
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| 37 |
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hdgrid(gcl->egp, gcl->hp = hp, myeye.vpt);
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| 38 |
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gcl->erg2 = 0;
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| 39 |
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for (i = 0, v = hp->wg[0]; i < 3; i++, v += 3)
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| 40 |
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gcl->erg2 += DOT(v,v);
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| 41 |
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gcl->erg2 *= (1./3.) * myeye.rng*myeye.rng;
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gwlarson |
3.19 |
}
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| 43 |
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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| 46 |
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gcl->gmax[0] = gcl->gmax[1] = -FHUGE;
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| 47 |
gwlarson |
3.19 |
}
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| 48 |
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| 49 |
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| 50 |
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static
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gwlarson |
3.20 |
groweyelim(gcl, gc, r0, r1) /* grow grid limits about eye point */
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| 52 |
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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| 55 |
gwlarson |
3.19 |
{
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| 56 |
gwlarson |
3.20 |
FVECT gp, ab;
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| 57 |
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double vlen, plen, dv0, dv1;
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| 58 |
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double rd2, dwall, gpos;
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int eyeout;
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register int i, g0, g1;
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gwlarson |
3.19 |
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| 62 |
gwlarson |
3.20 |
i = gc->w>>1;
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| 63 |
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if (gc->w&1)
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eyeout = (gp[i] = gcl->hp->grid[i]) < gcl->egp[i];
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else
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| 66 |
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eyeout = (gp[i] = 0) > gcl->egp[i];
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| 67 |
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gp[hdwg0[gc->w]] = gc->i[0] + r0;
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| 68 |
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gp[hdwg1[gc->w]] = gc->i[1] + r1;
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| 69 |
gwlarson |
3.19 |
VSUB(ab, gcl->egp, gp);
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| 70 |
gwlarson |
3.20 |
rd2 = DOT(ab,ab);
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| 71 |
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if (rd2 <= gcl->erg2) {
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| 72 |
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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| 74 |
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return;
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| 75 |
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}
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gwlarson |
3.20 |
rd2 = gcl->erg2 / rd2;
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vlen = 1. - rd2;
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plen = sqrt(rd2 * vlen);
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| 79 |
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g0 = gcl->gc.w>>1;
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| 80 |
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dwall = (gcl->gc.w&1 ? gcl->hp->grid[g0] : 0) - gp[g0];
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| 81 |
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for (i = 0; i < 4; i++) {
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| 82 |
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if (i == 2)
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| 83 |
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plen = -plen;
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| 84 |
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g1 = (g0+(i&1)+1)%3;
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| 85 |
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dv0 = vlen*ab[g0] + plen*ab[g1];
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| 86 |
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dv1 = vlen*ab[g1] - plen*ab[g0];
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| 87 |
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if ((dv0 < 0 ^ dwall < 0 ^ eyeout) ||
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| 88 |
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(dv0 <= FTINY && dv0 >= -FTINY)) {
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| 89 |
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if (eyeout)
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| 90 |
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dv1 = -dv1;
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| 91 |
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if (dv1 > FTINY)
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| 92 |
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gcl->gmax[i&1] = FHUGE;
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| 93 |
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else if (dv1 < -FTINY)
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| 94 |
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gcl->gmin[i&1] = -FHUGE;
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| 95 |
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} else {
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| 96 |
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gpos = gp[g1] + dv1*dwall/dv0;
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| 97 |
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if (gpos < gcl->gmin[i&1])
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| 98 |
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gcl->gmin[i&1] = gpos;
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| 99 |
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if (gpos > gcl->gmax[i&1])
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| 100 |
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gcl->gmax[i&1] = gpos;
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| 101 |
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}
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| 102 |
gwlarson |
3.19 |
}
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| 103 |
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}
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| 104 |
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| 105 |
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| 106 |
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static int
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| 107 |
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clipeyelim(rrng, gcl) /* clip eye limits to grid cell */
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| 108 |
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register short rrng[2][2];
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| 109 |
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register struct gclim *gcl;
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| 110 |
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{
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| 111 |
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int incell = 1;
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register int i;
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| 114 |
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for (i = 0; i < 2; i++) {
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| 115 |
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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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| 117 |
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if (gcl->gmax[i] > gcl->gc.i[i]+1)
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| 118 |
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gcl->gmax[i] = gcl->gc.i[i]+1;
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| 119 |
gwlarson |
3.20 |
if (gcl->gmax[i] > gcl->gmin[i]) {
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| 120 |
gwlarson |
3.19 |
rrng[i][0] = 256.*(gcl->gmin[i] - gcl->gc.i[i]) +
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| 121 |
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(1.-FTINY);
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| 122 |
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rrng[i][1] = 256.*(gcl->gmax[i] - gcl->gc.i[i]) +
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| 123 |
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(1.-FTINY) - rrng[i][0];
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| 124 |
gwlarson |
3.20 |
} else
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| 125 |
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rrng[i][0] = rrng[i][1] = 0;
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| 126 |
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incell &= rrng[i][1] > 0;
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| 127 |
gwlarson |
3.19 |
}
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| 128 |
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return(incell);
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| 129 |
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}
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| 130 |
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| 131 |
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| 132 |
gregl |
3.1 |
packrays(rod, p) /* pack ray origins and directions */
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| 133 |
gwlarson |
3.15 |
register float *rod;
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| 134 |
gregl |
3.1 |
register PACKET *p;
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| 135 |
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{
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| 136 |
gwlarson |
3.19 |
int nretries = p->nr + 2;
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| 137 |
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struct gclim eyelim;
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| 138 |
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short rrng0[2][2], rrng1[2][2];
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| 139 |
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int useyelim;
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| 140 |
gregl |
3.3 |
GCOORD gc[2];
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| 141 |
gwlarson |
3.19 |
FVECT ro, rd;
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| 142 |
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double d;
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| 143 |
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register int i;
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| 144 |
gregl |
3.1 |
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| 145 |
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if (!hdbcoord(gc, hdlist[p->hd], p->bi))
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| 146 |
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error(CONSISTENCY, "bad beam index in packrays");
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| 147 |
gwlarson |
3.19 |
if ((useyelim = myeye.rng > FTINY)) {
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| 148 |
gwlarson |
3.20 |
initeyelim(&eyelim, hdlist[p->hd], gc);
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| 149 |
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groweyelim(&eyelim, gc+1, 0., 0.);
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| 150 |
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groweyelim(&eyelim, gc+1, 1., 1.);
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| 151 |
gwlarson |
3.19 |
useyelim &= clipeyelim(rrng0, &eyelim);
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| 152 |
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}
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| 153 |
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for (i = 0; i < p->nr; i++) {
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| 154 |
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retry:
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| 155 |
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if (useyelim) {
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| 156 |
gwlarson |
3.20 |
initeyelim(&eyelim, NULL, gc+1);
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| 157 |
gwlarson |
3.19 |
p->ra[i].r[0][0] = (int)(frandom()*rrng0[0][1])
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| 158 |
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+ rrng0[0][0];
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| 159 |
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p->ra[i].r[0][1] = (int)(frandom()*rrng0[1][1])
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| 160 |
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+ rrng0[1][0];
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| 161 |
gwlarson |
3.20 |
groweyelim(&eyelim, gc,
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| 162 |
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(1./256.)*(p->ra[i].r[0][0]+.5),
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| 163 |
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(1./256.)*(p->ra[i].r[0][1]+.5));
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| 164 |
gwlarson |
3.19 |
if (!clipeyelim(rrng1, &eyelim)) {
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| 165 |
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useyelim &= nretries-- > 0;
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| 166 |
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goto retry;
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| 167 |
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}
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| 168 |
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p->ra[i].r[1][0] = (int)(frandom()*rrng1[0][1])
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| 169 |
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+ rrng1[0][0];
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| 170 |
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p->ra[i].r[1][1] = (int)(frandom()*rrng1[1][1])
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| 171 |
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+ rrng1[1][0];
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| 172 |
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} else {
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| 173 |
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p->ra[i].r[0][0] = frandom() * 256.;
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| 174 |
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p->ra[i].r[0][1] = frandom() * 256.;
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| 175 |
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p->ra[i].r[1][0] = frandom() * 256.;
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| 176 |
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p->ra[i].r[1][1] = frandom() * 256.;
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| 177 |
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}
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| 178 |
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d = hdray(ro, rd, hdlist[p->hd], gc, p->ra[i].r);
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| 179 |
gregl |
3.1 |
if (p->offset != NULL) {
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| 180 |
gwlarson |
3.16 |
if (!vdef(OBSTRUCTIONS))
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| 181 |
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d *= frandom(); /* random offset */
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| 182 |
gregl |
3.8 |
VSUM(ro, ro, rd, d); /* advance ray */
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| 183 |
gwlarson |
3.19 |
p->offset[i] = d;
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| 184 |
gregl |
3.1 |
}
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| 185 |
gwlarson |
3.19 |
VCOPY(rod, ro);
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| 186 |
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rod += 3;
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| 187 |
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VCOPY(rod, rd);
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| 188 |
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rod += 3;
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| 189 |
gregl |
3.1 |
}
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| 190 |
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}
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| 191 |
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| 192 |
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| 193 |
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donerays(p, rvl) /* encode finished ray computations */
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| 194 |
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register PACKET *p;
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| 195 |
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register float *rvl;
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| 196 |
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{
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| 197 |
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double d;
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| 198 |
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register int i;
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| 199 |
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| 200 |
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for (i = 0; i < p->nr; i++) {
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| 201 |
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setcolr(p->ra[i].v, rvl[0], rvl[1], rvl[2]);
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| 202 |
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d = rvl[3];
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| 203 |
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if (p->offset != NULL)
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| 204 |
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d += p->offset[i];
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| 205 |
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p->ra[i].d = hdcode(hdlist[p->hd], d);
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| 206 |
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rvl += 4;
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| 207 |
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}
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| 208 |
gregl |
3.4 |
p->nc += p->nr;
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| 209 |
gregl |
3.5 |
}
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| 210 |
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| 211 |
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| 212 |
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int
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| 213 |
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done_rtrace() /* clean up and close rtrace calculation */
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| 214 |
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{
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| 215 |
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int status;
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| 216 |
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/* already closed? */
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| 217 |
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if (!nprocs)
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| 218 |
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return;
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| 219 |
|
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/* flush beam queue */
|
| 220 |
|
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done_packets(flush_queue());
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| 221 |
gregl |
3.7 |
/* sync holodeck */
|
| 222 |
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hdsync(NULL, 1);
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| 223 |
gregl |
3.5 |
/* close rtrace */
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| 224 |
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if ((status = end_rtrace()))
|
| 225 |
|
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error(WARNING, "bad exit status from rtrace");
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| 226 |
gregl |
3.9 |
if (vdef(REPORT)) { /* report time */
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| 227 |
gregl |
3.10 |
eputs("rtrace process closed\n");
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| 228 |
gregl |
3.5 |
report(0);
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| 229 |
gregl |
3.9 |
}
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| 230 |
gregl |
3.5 |
return(status); /* return status */
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| 231 |
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}
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| 232 |
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| 233 |
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| 234 |
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new_rtrace() /* restart rtrace calculation */
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| 235 |
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{
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| 236 |
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char combuf[128];
|
| 237 |
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| 238 |
|
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if (nprocs > 0) /* already running? */
|
| 239 |
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return;
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| 240 |
gregl |
3.6 |
starttime = time(NULL); /* reset start time and counts */
|
| 241 |
|
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npacksdone = nraysdone = 0L;
|
| 242 |
|
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if (vdef(TIME)) /* reset end time */
|
| 243 |
|
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endtime = starttime + vflt(TIME)*3600. + .5;
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| 244 |
gregl |
3.5 |
if (vdef(RIF)) { /* rerun rad to update octree */
|
| 245 |
|
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sprintf(combuf, "rad -v 0 -s -w %s", vval(RIF));
|
| 246 |
|
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if (system(combuf))
|
| 247 |
|
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error(WARNING, "error running rad");
|
| 248 |
|
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}
|
| 249 |
|
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if (start_rtrace() < 1) /* start rtrace */
|
| 250 |
|
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error(WARNING, "cannot restart rtrace");
|
| 251 |
gregl |
3.9 |
else if (vdef(REPORT)) {
|
| 252 |
|
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eputs("rtrace process restarted\n");
|
| 253 |
gregl |
3.5 |
report(0);
|
| 254 |
gregl |
3.9 |
}
|
| 255 |
gregl |
3.5 |
}
|
| 256 |
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|
| 257 |
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| 258 |
|
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getradfile() /* run rad and get needed variables */
|
| 259 |
|
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{
|
| 260 |
gwlarson |
3.12 |
static short mvar[] = {OCTREE,EYESEP,-1};
|
| 261 |
gregl |
3.5 |
static char tf1[] = TEMPLATE;
|
| 262 |
|
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char tf2[64];
|
| 263 |
|
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char combuf[256];
|
| 264 |
|
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char *pippt;
|
| 265 |
|
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register int i;
|
| 266 |
|
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register char *cp;
|
| 267 |
|
|
/* check if rad file specified */
|
| 268 |
|
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if (!vdef(RIF))
|
| 269 |
gregl |
3.11 |
return(0);
|
| 270 |
gregl |
3.5 |
/* create rad command */
|
| 271 |
|
|
mktemp(tf1);
|
| 272 |
|
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sprintf(tf2, "%s.rif", tf1);
|
| 273 |
|
|
sprintf(combuf,
|
| 274 |
|
|
"rad -v 0 -s -e -w %s OPTFILE=%s | egrep '^[ \t]*(NOMATCH",
|
| 275 |
|
|
vval(RIF), tf1);
|
| 276 |
|
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cp = combuf;
|
| 277 |
|
|
while (*cp){
|
| 278 |
|
|
if (*cp == '|') pippt = cp;
|
| 279 |
|
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cp++;
|
| 280 |
|
|
} /* match unset variables */
|
| 281 |
|
|
for (i = 0; mvar[i] >= 0; i++)
|
| 282 |
|
|
if (!vdef(mvar[i])) {
|
| 283 |
|
|
*cp++ = '|';
|
| 284 |
|
|
strcpy(cp, vnam(mvar[i]));
|
| 285 |
|
|
while (*cp) cp++;
|
| 286 |
|
|
pippt = NULL;
|
| 287 |
|
|
}
|
| 288 |
|
|
if (pippt != NULL)
|
| 289 |
|
|
strcpy(pippt, "> /dev/null"); /* nothing to match */
|
| 290 |
|
|
else
|
| 291 |
|
|
sprintf(cp, ")[ \t]*=' > %s", tf2);
|
| 292 |
gwlarson |
3.13 |
#ifdef DEBUG
|
| 293 |
|
|
wputs(combuf); wputs("\n");
|
| 294 |
|
|
#endif
|
| 295 |
|
|
system(combuf); /* ignore exit code */
|
| 296 |
gregl |
3.5 |
if (pippt == NULL) {
|
| 297 |
|
|
loadvars(tf2); /* load variables */
|
| 298 |
|
|
unlink(tf2);
|
| 299 |
|
|
}
|
| 300 |
|
|
rtargc += wordfile(rtargv+rtargc, tf1); /* get rtrace options */
|
| 301 |
|
|
unlink(tf1); /* clean up */
|
| 302 |
gregl |
3.11 |
return(1);
|
| 303 |
gregl |
3.6 |
}
|
| 304 |
|
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|
| 305 |
|
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|
| 306 |
|
|
report(t) /* report progress so far */
|
| 307 |
|
|
time_t t;
|
| 308 |
|
|
{
|
| 309 |
|
|
static time_t seconds2go = 1000000;
|
| 310 |
|
|
|
| 311 |
|
|
if (t == 0L)
|
| 312 |
|
|
t = time(NULL);
|
| 313 |
|
|
sprintf(errmsg, "%ld packets (%ld rays) done after %.2f hours\n",
|
| 314 |
|
|
npacksdone, nraysdone, (t-starttime)/3600.);
|
| 315 |
|
|
eputs(errmsg);
|
| 316 |
|
|
if (seconds2go == 1000000)
|
| 317 |
|
|
seconds2go = vdef(REPORT) ? (long)(vflt(REPORT)*60. + .5) : 0L;
|
| 318 |
|
|
if (seconds2go)
|
| 319 |
|
|
reporttime = t + seconds2go;
|
| 320 |
gregl |
3.1 |
}
|
