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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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/* Copyright (c) 1999 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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*/ |
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#include "rholo.h" |
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#include <sys/types.h> |
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#include "view.h" |
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#ifndef NFRAG2CHUNK |
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#define NFRAG2CHUNK 4096 /* number of fragments to start chunking */ |
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extern time_t time(); |
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int chunkycmp = 0; /* clump beams together on disk */ |
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static PACKHEAD *complist=NULL; /* list of beams to compute */ |
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static int complen=0; /* length of complist */ |
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static int listpos=0; /* current list position for next_packet */ |
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static int lastin= -1; /* last ordered position in list */ |
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static int chunky=0; /* clump beams together on disk */ |
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int |
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BEAMI *bip0, *bip1; |
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register long c; |
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/* first check desired quantities */ |
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if (chunky) |
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if (chunkycmp) |
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c = rchunk(b1->nr)*(rchunk(b0->nc)+1L) - |
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rchunk(b0->nr)*(rchunk(b1->nc)+1L); |
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else |
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n = b->nrm; |
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if (p == NULL) p = (PACKHEAD *)malloc(packsiz(n)); |
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else p = (PACKHEAD *)realloc((char *)p, packsiz(n)); |
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if (p == NULL) |
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error(SYSTEM, "out of memory in dispbeam"); |
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CHECK(p==NULL, SYSTEM, "out of memory in dispbeam"); |
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} |
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/* assign packet fields */ |
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bcopy((char *)hdbray(b), (char *)packra(p), b->nrm*sizeof(RAYVAL)); |
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error(CONSISTENCY, "unregistered holodeck in dispbeam"); |
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p->bi = hb->b; |
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disp_packet(p); /* display it */ |
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if (n >= 1024) { /* free ridiculous packets */ |
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free((char *)p); |
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p = NULL; n = 0; |
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} |
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} |
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complist[i].nr += csm->nr; |
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csm->nr = 0; |
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break; |
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case BS_MAX: /* maximum of counts */ |
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if (csm->nr > complist[i].nr) |
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complist[i].nr = csm->nr; |
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csm->nr = 0; |
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break; |
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case BS_ADJ: /* reset count */ |
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complist[i].nr = csm->nr; |
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csm->nr = 0; |
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bcopy((char *)clist, (char *)complist, nents*sizeof(PACKHEAD)); |
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break; |
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case BS_ADD: /* add to computation set */ |
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case BS_MAX: /* maximum of quantities */ |
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case BS_ADJ: /* adjust set quantities */ |
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if (nents <= 0) |
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return; |
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for (i = nents, csm = clist; i-- && csm->nr > csm->nc; csm++) |
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; |
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n = csm - clist; |
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if (op == BS_ADJ) { /* don't regenerate adjusted beams */ |
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if (op != BS_ADD) { /* don't regenerate adjusted beams */ |
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for (++i; i-- && csm->nr > 0; csm++) |
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; |
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nents = csm - clist; |
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} |
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init_global() /* initialize global ray computation */ |
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ambient_list() /* compute ambient beam list */ |
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{ |
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long wtotal = 0; |
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int4 wtotal, minrt; |
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double frac; |
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int i; |
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register int j, k; |
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/* free old list and empty queue */ |
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if (complen > 0) { |
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free((char *)complist); |
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done_packets(flush_queue()); |
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} |
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/* reseed random number generator */ |
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srandom(time(NULL)); |
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/* allocate beam list */ |
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complen = 0; |
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for (j = 0; hdlist[j] != NULL; j++) |
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complen += nbeams(hdlist[j]); |
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complist = (PACKHEAD *)malloc(complen*sizeof(PACKHEAD)); |
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if (complist == NULL) |
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error(SYSTEM, "out of memory in init_global"); |
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CHECK(complist==NULL, SYSTEM, "out of memory in ambient_list"); |
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/* compute beam weights */ |
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k = 0; |
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k = 0; wtotal = 0; |
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for (j = 0; hdlist[j] != NULL; j++) { |
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frac = 512. * VLEN(hdlist[j]->wg[0]) * |
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VLEN(hdlist[j]->wg[1]) * |
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wtotal += complist[k++].nr; |
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} |
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} |
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/* adjust weights */ |
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/* adjust sample weights */ |
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if (vdef(DISKSPACE)) |
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frac = 1024.*1024.*vflt(DISKSPACE) / (wtotal*sizeof(RAYVAL)); |
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else |
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frac = 1024.*1024.*16384. / (wtotal*sizeof(RAYVAL)); |
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while (k--) |
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complist[k].nr = frac*complist[k].nr + 0.5; |
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listpos = 0; lastin = -1; /* perform initial sort */ |
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sortcomplist(); |
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frac = 1024.*1024.*2048. / (wtotal*sizeof(RAYVAL)); |
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minrt = .02*frac*wtotal/complen + .5; /* heuristic mimimum */ |
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if (minrt > RPACKSIZ) |
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minrt = RPACKSIZ; |
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for (k = complen; k--; ) |
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if ((complist[k].nr = frac*complist[k].nr + 0.5) < minrt) |
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complist[k].nr = minrt; |
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listpos = 0; lastin = -1; /* flag initial sort */ |
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} |
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view_list(fp) /* assign beam priority from view list */ |
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FILE *fp; |
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{ |
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double pa = 1.; |
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VIEW curview; |
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int xr, yr; |
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char *err; |
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BEAMLIST blist; |
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copystruct(&curview, &stdview); |
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while (nextview(&curview, fp) != EOF) { |
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if ((err = setview(&curview)) != NULL) { |
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error(WARNING, err); |
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continue; |
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} |
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xr = yr = 1024; |
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normaspect(viewaspect(&curview), &pa, &xr, &yr); |
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viewbeams(&curview, xr, yr, &blist); |
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bundle_set(BS_MAX, blist.bl, blist.nb); |
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free((char *)blist.bl); |
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} |
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} |
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init_global() /* initialize global ray computation */ |
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{ |
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register int k; |
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/* free old list and empty queue */ |
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if (complen > 0) { |
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free((char *)complist); |
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done_packets(flush_queue()); |
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} |
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/* reseed random number generator */ |
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srandom(time(NULL)); |
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/* allocate beam list */ |
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if (readinp) |
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view_list(stdin); |
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else |
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ambient_list(); |
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/* no view vicinity */ |
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myeye.rng = 0; |
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} |
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if (complen <= 0) /* check to see if there is even a list */ |
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return; |
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if (!chunky) /* check to see if fragment list is full */ |
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if (!chunkycmp) /* check to see if fragment list is full */ |
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if (!hdfragOK(hdlist[0]->fd, &listlen, NULL) |
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#if NFRAG2CHUNK |
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|| listlen >= NFRAG2CHUNK |
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#endif |
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) { |
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chunkycmp++; /* use "chunky" comparison */ |
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lastin = -1; /* need to re-sort list */ |
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#ifdef DEBUG |
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error(WARNING, "using chunky comparison mode"); |
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#endif |
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chunky++; /* use "chunky" comparison */ |
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lastin = -1; /* need to re-sort list */ |
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} |
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#ifdef DEBUG |
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else |
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fprintf(stderr, "sortcomplist: %d fragments\n", |
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listlen); |
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#endif |
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if (lastin < 0 || listpos*4 >= complen*3) |
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qsort((char *)complist, complen, sizeof(PACKHEAD), beamcmp); |
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else if (listpos) { /* else sort and merge sublist */ |
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list2 = (PACKHEAD *)malloc(listpos*sizeof(PACKHEAD)); |
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if (list2 == NULL) |
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error(SYSTEM, "out of memory in sortcomplist"); |
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CHECK(list2==NULL, SYSTEM, "out of memory in sortcomplist"); |
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bcopy((char *)complist,(char *)list2,listpos*sizeof(PACKHEAD)); |
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qsort((char *)list2, listpos, sizeof(PACKHEAD), beamcmp); |
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mergeclists(complist, list2, listpos, |
