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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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|
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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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/* |
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* Rtrace support routines for holodeck rendering |
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*/ |
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|
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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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|
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|
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VIEWPOINT myeye; /* target view position */ |
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|
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|
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packrays(rod, p) /* pack ray origins and directions */ |
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register float *rod; |
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register PACKET *p; |
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{ |
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short packord[RPACKSIZ]; |
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float packdc[RPACKSIZ]; |
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int iterleft = 3*p->nr; |
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BYTE rpos[2][2]; |
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FVECT ro, rd, rp1; |
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GCOORD gc[2]; |
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double d, dc, meandist; |
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int i; |
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register int ii; |
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|
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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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for (i = 0, meandist = 0.; i < p->nr || meandist > myeye.rng+FTINY; ) { |
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rpos[0][0] = frandom() * 256.; |
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rpos[0][1] = frandom() * 256.; |
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rpos[1][0] = frandom() * 256.; |
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rpos[1][1] = frandom() * 256.; |
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d = hdray(ro, rd, hdlist[p->hd], gc, rpos); |
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if (myeye.rng > FTINY) { /* check eyepoint */ |
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register int nexti; |
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|
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VSUM(rp1, ro, rd, d); |
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dc = sqrt(dist2line(myeye.vpt, ro, rp1)) / p->nr; |
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if (i == p->nr) { /* packet full */ |
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nexti = packord[i-1]; |
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if (!iterleft--) |
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break; /* tried enough! */ |
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if (dc >= packdc[nexti]) |
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continue; /* worse than worst */ |
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meandist -= packdc[nexti]; |
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} else |
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nexti = i++; |
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meandist += packdc[nexti] = dc; /* new distance */ |
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for (ii = i; --ii; ) { /* insertion sort */ |
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if (dc > packdc[packord[ii-1]]) |
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break; |
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packord[ii] = packord[ii-1]; |
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} |
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packord[ii] = nexti; |
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ii = nexti; /* put it here */ |
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} else |
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ii = i++; |
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if (p->offset != NULL) { |
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if (!vdef(OBSTRUCTIONS)) |
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d *= frandom(); /* random offset */ |
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VSUM(ro, ro, rd, d); /* advance ray */ |
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p->offset[ii] = d; |
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} |
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p->ra[ii].r[0][0] = rpos[0][0]; |
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p->ra[ii].r[0][1] = rpos[0][1]; |
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p->ra[ii].r[1][0] = rpos[1][0]; |
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p->ra[ii].r[1][1] = rpos[1][1]; |
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VCOPY(rod+6*ii, ro); |
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VCOPY(rod+6*ii+3, rd); |
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} |
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#ifdef DEBUG |
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fprintf(stderr, "%f mean distance for target %f (%d iterations)\n", |
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meandist, myeye.rng, 3*p->nr - iterleft); |
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#endif |
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} |
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|
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|
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donerays(p, rvl) /* encode finished ray computations */ |
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register PACKET *p; |
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register float *rvl; |
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{ |
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double d; |
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register int i; |
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|
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for (i = 0; i < p->nr; i++) { |
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setcolr(p->ra[i].v, rvl[0], rvl[1], rvl[2]); |
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d = rvl[3]; |
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if (p->offset != NULL) |
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d += p->offset[i]; |
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p->ra[i].d = hdcode(hdlist[p->hd], d); |
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rvl += 4; |
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} |
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p->nc += p->nr; |
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} |
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|
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|
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int |
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done_rtrace() /* clean up and close rtrace calculation */ |
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{ |
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int status; |
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/* already closed? */ |
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if (!nprocs) |
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return; |
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/* flush beam queue */ |
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done_packets(flush_queue()); |
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/* sync holodeck */ |
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hdsync(NULL, 1); |
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/* close rtrace */ |
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if ((status = end_rtrace())) |
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error(WARNING, "bad exit status from rtrace"); |
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if (vdef(REPORT)) { /* report time */ |
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eputs("rtrace process closed\n"); |
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report(0); |
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} |
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return(status); /* return status */ |
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} |
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|
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|
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new_rtrace() /* restart rtrace calculation */ |
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{ |
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char combuf[128]; |
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|
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if (nprocs > 0) /* already running? */ |
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return; |
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starttime = time(NULL); /* reset start time and counts */ |
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npacksdone = nraysdone = 0L; |
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if (vdef(TIME)) /* reset end time */ |
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endtime = starttime + vflt(TIME)*3600. + .5; |
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if (vdef(RIF)) { /* rerun rad to update octree */ |
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sprintf(combuf, "rad -v 0 -s -w %s", vval(RIF)); |
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if (system(combuf)) |
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error(WARNING, "error running rad"); |
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} |
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if (start_rtrace() < 1) /* start rtrace */ |
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error(WARNING, "cannot restart rtrace"); |
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else if (vdef(REPORT)) { |
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eputs("rtrace process restarted\n"); |
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report(0); |
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} |
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} |
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|
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|
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getradfile() /* run rad and get needed variables */ |
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{ |
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static short mvar[] = {OCTREE,EYESEP,-1}; |
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static char tf1[] = TEMPLATE; |
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char tf2[64]; |
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char combuf[256]; |
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char *pippt; |
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register int i; |
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register char *cp; |
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/* check if rad file specified */ |
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if (!vdef(RIF)) |
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return(0); |
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/* create rad command */ |
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mktemp(tf1); |
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sprintf(tf2, "%s.rif", tf1); |
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sprintf(combuf, |
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"rad -v 0 -s -e -w %s OPTFILE=%s | egrep '^[ \t]*(NOMATCH", |
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vval(RIF), tf1); |
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cp = combuf; |
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while (*cp){ |
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if (*cp == '|') pippt = cp; |
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cp++; |
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} /* match unset variables */ |
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for (i = 0; mvar[i] >= 0; i++) |
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if (!vdef(mvar[i])) { |
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*cp++ = '|'; |
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strcpy(cp, vnam(mvar[i])); |
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while (*cp) cp++; |
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pippt = NULL; |
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} |
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if (pippt != NULL) |
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strcpy(pippt, "> /dev/null"); /* nothing to match */ |
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else |
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sprintf(cp, ")[ \t]*=' > %s", tf2); |
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#ifdef DEBUG |
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wputs(combuf); wputs("\n"); |
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#endif |
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system(combuf); /* ignore exit code */ |
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if (pippt == NULL) { |
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loadvars(tf2); /* load variables */ |
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unlink(tf2); |
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} |
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rtargc += wordfile(rtargv+rtargc, tf1); /* get rtrace options */ |
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unlink(tf1); /* clean up */ |
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return(1); |
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} |
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|
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|
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report(t) /* report progress so far */ |
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time_t t; |
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{ |
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static time_t seconds2go = 1000000; |
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|
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if (t == 0L) |
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t = time(NULL); |
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sprintf(errmsg, "%ld packets (%ld rays) done after %.2f hours\n", |
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npacksdone, nraysdone, (t-starttime)/3600.); |
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eputs(errmsg); |
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if (seconds2go == 1000000) |
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seconds2go = vdef(REPORT) ? (long)(vflt(REPORT)*60. + .5) : 0L; |
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if (seconds2go) |
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reporttime = t + seconds2go; |
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} |
