| 1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */
|
| 2 |
|
| 3 |
#ifndef lint
|
| 4 |
static char SCCSid[] = "$SunId$ SGI";
|
| 5 |
#endif
|
| 6 |
|
| 7 |
/*
|
| 8 |
* Rtrace support routines for holodeck rendering
|
| 9 |
*/
|
| 10 |
|
| 11 |
#include "rholo.h"
|
| 12 |
#include "paths.h"
|
| 13 |
#include "random.h"
|
| 14 |
|
| 15 |
|
| 16 |
VIEWPOINT myeye; /* target view position */
|
| 17 |
|
| 18 |
|
| 19 |
packrays(rod, p) /* pack ray origins and directions */
|
| 20 |
register float *rod;
|
| 21 |
register PACKET *p;
|
| 22 |
{
|
| 23 |
float packdc2[RPACKSIZ];
|
| 24 |
int iterleft = 3*p->nr + 9;
|
| 25 |
BYTE rpos[2][2];
|
| 26 |
FVECT ro, rd, rp1;
|
| 27 |
GCOORD gc[2];
|
| 28 |
double d, dc2, md2, td2, dc2worst = FHUGE;
|
| 29 |
int i;
|
| 30 |
register int ii;
|
| 31 |
|
| 32 |
if (!hdbcoord(gc, hdlist[p->hd], p->bi))
|
| 33 |
error(CONSISTENCY, "bad beam index in packrays");
|
| 34 |
td2 = myeye.rng + FTINY; td2 *= td2;
|
| 35 |
for (i = 0, md2 = 0.; i < p->nr || (md2 > td2 && iterleft--); ) {
|
| 36 |
rpos[0][0] = frandom() * 256.;
|
| 37 |
rpos[0][1] = frandom() * 256.;
|
| 38 |
rpos[1][0] = frandom() * 256.;
|
| 39 |
rpos[1][1] = frandom() * 256.;
|
| 40 |
d = hdray(ro, rd, hdlist[p->hd], gc, rpos);
|
| 41 |
if (myeye.rng > FTINY) { /* check eyepoint */
|
| 42 |
register int nexti;
|
| 43 |
|
| 44 |
VSUM(rp1, ro, rd, d);
|
| 45 |
dc2 = dist2line(myeye.vpt, ro, rp1) / p->nr;
|
| 46 |
if (i == p->nr) { /* packet full */
|
| 47 |
if (dc2 >= dc2worst) /* quick check */
|
| 48 |
continue;
|
| 49 |
nexti = 0; /* find worst */
|
| 50 |
for (ii = i; --ii; )
|
| 51 |
if (packdc2[ii] > packdc2[nexti])
|
| 52 |
nexti = ii;
|
| 53 |
if (dc2 >= (dc2worst = packdc2[nexti]))
|
| 54 |
continue; /* worse than worst */
|
| 55 |
md2 -= dc2worst;
|
| 56 |
} else
|
| 57 |
nexti = i++;
|
| 58 |
md2 += packdc2[nexti] = dc2; /* new distance */
|
| 59 |
ii = nexti; /* put it here */
|
| 60 |
} else
|
| 61 |
ii = i++;
|
| 62 |
if (p->offset != NULL) {
|
| 63 |
if (!vdef(OBSTRUCTIONS))
|
| 64 |
d *= frandom(); /* random offset */
|
| 65 |
VSUM(ro, ro, rd, d); /* advance ray */
|
| 66 |
p->offset[ii] = d;
|
| 67 |
}
|
| 68 |
p->ra[ii].r[0][0] = rpos[0][0];
|
| 69 |
p->ra[ii].r[0][1] = rpos[0][1];
|
| 70 |
p->ra[ii].r[1][0] = rpos[1][0];
|
| 71 |
p->ra[ii].r[1][1] = rpos[1][1];
|
| 72 |
VCOPY(rod+6*ii, ro);
|
| 73 |
VCOPY(rod+6*ii+3, rd);
|
| 74 |
}
|
| 75 |
#ifdef DEBUG
|
| 76 |
fprintf(stderr, "%f mean distance for target %f (%d iterations left)\n",
|
| 77 |
sqrt(md2), myeye.rng, iterleft);
|
| 78 |
#endif
|
| 79 |
}
|
| 80 |
|
| 81 |
|
| 82 |
donerays(p, rvl) /* encode finished ray computations */
|
| 83 |
register PACKET *p;
|
| 84 |
register float *rvl;
|
| 85 |
{
|
| 86 |
double d;
|
| 87 |
register int i;
|
| 88 |
|
| 89 |
for (i = 0; i < p->nr; i++) {
|
| 90 |
setcolr(p->ra[i].v, rvl[0], rvl[1], rvl[2]);
|
| 91 |
d = rvl[3];
|
| 92 |
if (p->offset != NULL)
|
| 93 |
d += p->offset[i];
|
| 94 |
p->ra[i].d = hdcode(hdlist[p->hd], d);
|
| 95 |
rvl += 4;
|
| 96 |
}
|
| 97 |
p->nc += p->nr;
|
| 98 |
}
|
| 99 |
|
| 100 |
|
| 101 |
int
|
| 102 |
done_rtrace() /* clean up and close rtrace calculation */
|
| 103 |
{
|
| 104 |
int status;
|
| 105 |
/* already closed? */
|
| 106 |
if (!nprocs)
|
| 107 |
return;
|
| 108 |
/* flush beam queue */
|
| 109 |
done_packets(flush_queue());
|
| 110 |
/* sync holodeck */
|
| 111 |
hdsync(NULL, 1);
|
| 112 |
/* close rtrace */
|
| 113 |
if ((status = end_rtrace()))
|
| 114 |
error(WARNING, "bad exit status from rtrace");
|
| 115 |
if (vdef(REPORT)) { /* report time */
|
| 116 |
eputs("rtrace process closed\n");
|
| 117 |
report(0);
|
| 118 |
}
|
| 119 |
return(status); /* return status */
|
| 120 |
}
|
| 121 |
|
| 122 |
|
| 123 |
new_rtrace() /* restart rtrace calculation */
|
| 124 |
{
|
| 125 |
char combuf[128];
|
| 126 |
|
| 127 |
if (nprocs > 0) /* already running? */
|
| 128 |
return;
|
| 129 |
starttime = time(NULL); /* reset start time and counts */
|
| 130 |
npacksdone = nraysdone = 0L;
|
| 131 |
if (vdef(TIME)) /* reset end time */
|
| 132 |
endtime = starttime + vflt(TIME)*3600. + .5;
|
| 133 |
if (vdef(RIF)) { /* rerun rad to update octree */
|
| 134 |
sprintf(combuf, "rad -v 0 -s -w %s", vval(RIF));
|
| 135 |
if (system(combuf))
|
| 136 |
error(WARNING, "error running rad");
|
| 137 |
}
|
| 138 |
if (start_rtrace() < 1) /* start rtrace */
|
| 139 |
error(WARNING, "cannot restart rtrace");
|
| 140 |
else if (vdef(REPORT)) {
|
| 141 |
eputs("rtrace process restarted\n");
|
| 142 |
report(0);
|
| 143 |
}
|
| 144 |
}
|
| 145 |
|
| 146 |
|
| 147 |
getradfile() /* run rad and get needed variables */
|
| 148 |
{
|
| 149 |
static short mvar[] = {OCTREE,EYESEP,-1};
|
| 150 |
static char tf1[] = TEMPLATE;
|
| 151 |
char tf2[64];
|
| 152 |
char combuf[256];
|
| 153 |
char *pippt;
|
| 154 |
register int i;
|
| 155 |
register char *cp;
|
| 156 |
/* check if rad file specified */
|
| 157 |
if (!vdef(RIF))
|
| 158 |
return(0);
|
| 159 |
/* create rad command */
|
| 160 |
mktemp(tf1);
|
| 161 |
sprintf(tf2, "%s.rif", tf1);
|
| 162 |
sprintf(combuf,
|
| 163 |
"rad -v 0 -s -e -w %s OPTFILE=%s | egrep '^[ \t]*(NOMATCH",
|
| 164 |
vval(RIF), tf1);
|
| 165 |
cp = combuf;
|
| 166 |
while (*cp){
|
| 167 |
if (*cp == '|') pippt = cp;
|
| 168 |
cp++;
|
| 169 |
} /* match unset variables */
|
| 170 |
for (i = 0; mvar[i] >= 0; i++)
|
| 171 |
if (!vdef(mvar[i])) {
|
| 172 |
*cp++ = '|';
|
| 173 |
strcpy(cp, vnam(mvar[i]));
|
| 174 |
while (*cp) cp++;
|
| 175 |
pippt = NULL;
|
| 176 |
}
|
| 177 |
if (pippt != NULL)
|
| 178 |
strcpy(pippt, "> /dev/null"); /* nothing to match */
|
| 179 |
else
|
| 180 |
sprintf(cp, ")[ \t]*=' > %s", tf2);
|
| 181 |
#ifdef DEBUG
|
| 182 |
wputs(combuf); wputs("\n");
|
| 183 |
#endif
|
| 184 |
system(combuf); /* ignore exit code */
|
| 185 |
if (pippt == NULL) {
|
| 186 |
loadvars(tf2); /* load variables */
|
| 187 |
unlink(tf2);
|
| 188 |
}
|
| 189 |
rtargc += wordfile(rtargv+rtargc, tf1); /* get rtrace options */
|
| 190 |
unlink(tf1); /* clean up */
|
| 191 |
return(1);
|
| 192 |
}
|
| 193 |
|
| 194 |
|
| 195 |
report(t) /* report progress so far */
|
| 196 |
time_t t;
|
| 197 |
{
|
| 198 |
static time_t seconds2go = 1000000;
|
| 199 |
|
| 200 |
if (t == 0L)
|
| 201 |
t = time(NULL);
|
| 202 |
sprintf(errmsg, "%ld packets (%ld rays) done after %.2f hours\n",
|
| 203 |
npacksdone, nraysdone, (t-starttime)/3600.);
|
| 204 |
eputs(errmsg);
|
| 205 |
if (seconds2go == 1000000)
|
| 206 |
seconds2go = vdef(REPORT) ? (long)(vflt(REPORT)*60. + .5) : 0L;
|
| 207 |
if (seconds2go)
|
| 208 |
reporttime = t + seconds2go;
|
| 209 |
}
|
