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gregl |
3.1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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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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* Create a closed environment from a holodeck section |
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*/ |
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#include "holo.h" |
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#define ourhp (hdlist[0]) |
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char *progname; /* global argv[0] */ |
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char *prefix; /* file name prefix */ |
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HDBEAMI *gabmi; /* beam index array */ |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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int sect; |
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register int n; |
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progname = argv[0]; |
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if (argc < 3 | argc > 4) |
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goto userr; |
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prefix = argv[1]; |
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sect = argc==3 ? 0 : atoi(argv[3]); |
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openholo(argv[2], sect); |
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mkcalfile(argv[2], sect); |
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n = ourhp->grid[0] * ourhp->grid[1]; |
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if (ourhp->grid[0] * ourhp->grid[2] > n) |
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n = ourhp->grid[0] * ourhp->grid[2]; |
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if (ourhp->grid[1] * ourhp->grid[2] > n) |
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n = ourhp->grid[1] * ourhp->grid[2]; |
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gabmi = (HDBEAMI *)malloc(n*sizeof(HDBEAMI)); |
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if (gabmi == NULL) |
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error(SYSTEM, "out of memory in main"); |
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while (n--) |
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gabmi[n].h = ourhp; |
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hdcachesize = 0; |
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for (n = 0; n < 6; n++) |
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mkwall(argv[2], sect, n); |
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quit(0); |
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userr: |
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fprintf(stderr, "Usage: %s prefix input.hdk [section]\n", progname); |
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exit(1); |
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} |
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openholo(fname, sect) /* open holodeck section for input */ |
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char *fname; |
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int sect; |
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{ |
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extern long ftell(); |
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FILE *fp; |
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int fd; |
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int4 nextloc; |
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int n; |
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/* open holodeck file */ |
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if ((fp = fopen(fname, "r")) == NULL) { |
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sprintf(errmsg, "cannot open \"%s\"", fname); |
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error(SYSTEM, errmsg); |
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} |
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/* check header and magic number */ |
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if (checkheader(fp, HOLOFMT, NULL) < 0 || getw(fp) != HOLOMAGIC) { |
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sprintf(errmsg, "file \"%s\" not in holodeck format", fname); |
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error(USER, errmsg); |
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} |
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fd = dup(fileno(fp)); /* dup file handle */ |
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nextloc = ftell(fp); /* get stdio position */ |
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fclose(fp); /* done with stdio */ |
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for (n = 0; nextloc > 0L; n++) { /* get the indicated section */ |
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lseek(fd, (long)nextloc, 0); |
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read(fd, (char *)&nextloc, sizeof(nextloc)); |
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if (n == sect) { |
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hdinit(fd, NULL); |
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return; |
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} |
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} |
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error(USER, "holodeck section not found"); |
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} |
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mkwall(hdk, sect, wn) /* make map for indicated wall */ |
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char *hdk; |
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int sect; |
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int wn; |
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{ |
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static char cname[3][6] = {"Red", "Green", "Blue"}; |
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char fnbuf[128]; |
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FILE *cdat[3]; |
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int st = 0; |
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int wo, i, j; |
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/* loop through each opposing wall */ |
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for (wo = 0; wo < 6; wo++) { |
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if (wo == wn) continue; |
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/* create data files */ |
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sprintf(fnbuf, "%s_%dr%d.dat", prefix, wn, wo); |
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if ((cdat[0] = fopen(fnbuf, "w")) == NULL) |
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goto openerr; |
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sprintf(fnbuf, "%s_%dg%d.dat", prefix, wn, wo); |
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if ((cdat[1] = fopen(fnbuf, "w")) == NULL) |
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goto openerr; |
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sprintf(fnbuf, "%s_%db%d.dat", prefix, wn, wo); |
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if ((cdat[2] = fopen(fnbuf, "w")) == NULL) |
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goto openerr; |
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/* write dimensions */ |
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for (i = 0; i < 3; i++) { |
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fprintf(cdat[i], |
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"# %s channel for wall %d -> wall %d of section %d in holodeck \"%s\"\n", |
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cname[i], wo, wn, sect, hdk); |
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fprintf(cdat[i], |
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"4\n0.5 %.1f %d\n0.5 %.1f %d\n0.5 %.1f %d\n0.5 %.1f %d\n", |
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ourhp->grid[hdwg0[wn]]-.5, ourhp->grid[hdwg0[wn]], |
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ourhp->grid[hdwg1[wn]]-.5, ourhp->grid[hdwg1[wn]], |
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ourhp->grid[hdwg0[wo]]-.5, ourhp->grid[hdwg0[wo]], |
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ourhp->grid[hdwg1[wo]]-.5, ourhp->grid[hdwg1[wo]]); |
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} |
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/* run each grid cell */ |
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for (i = 0; i < ourhp->grid[hdwg0[wn]]; i++) |
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for (j = 0; j < ourhp->grid[hdwg1[wn]]; j++) |
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dogrid(wn, i, j, wo, cdat); |
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/* close files */ |
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if (fclose(cdat[0]) == EOF | fclose(cdat[1]) == EOF | |
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fclose(cdat[2]) == EOF) |
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error(SYSTEM, "write error in mkwall"); |
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/* put out pattern */ |
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printf("\n%s colordata wallmap\n", st++ ? "wallmap" : "void"); |
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printf("11 f f f %s_%dr%d.dat %s_%dg%d.dat %s_%db%d.dat\n", |
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prefix,wn,wo, prefix,wn,wo, prefix,wn,wo); |
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printf("\t%s.cal nu nv ou ov\n0\n2 %d %d\n", prefix, wn, wo); |
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} |
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/* put out polygon */ |
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printf("\nwallmap glow wallglow\n0\n0\n4 1 1 1 0\n"); |
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printf("\nwallglow polygon wall%d\n0\n0\n12\n", wn); |
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wallverts(wn); |
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return; |
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openerr: |
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sprintf(errmsg, "cannot open \"%d\" for writing", fnbuf); |
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error(SYSTEM, errmsg); |
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} |
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wallverts(wn) /* print out vertices for wall wn */ |
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int wn; |
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{ |
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int rev, i0, i1; |
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FVECT corn, vt; |
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if ((rev = wn & 1)) |
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VSUM(corn, ourhp->orig, ourhp->xv[wn>>1], 1.); |
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else |
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VCOPY(corn, ourhp->orig); |
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fcross(vt, ourhp->xv[i0=hdwg0[wn]], ourhp->xv[i1=hdwg1[wn]]); |
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if (DOT(vt, ourhp->wg[wn>>1]) < 0.) |
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rev ^= 1; |
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if (rev) { |
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i0 = hdwg1[wn]; i1 = hdwg0[wn]; |
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} |
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printf("\t%.10e %.10e %.10e\n", corn[0], corn[1], corn[2]); |
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printf("\t%.10e %.10e %.10e\n", corn[0] + ourhp->xv[i0][0], |
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corn[1] + ourhp->xv[i0][1], corn[2] + ourhp->xv[i0][2]); |
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printf("\t%.10e %.10e %.10e\n", |
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corn[0] + ourhp->xv[i0][0] + ourhp->xv[i1][0], |
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corn[1] + ourhp->xv[i0][1] + ourhp->xv[i1][1], |
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corn[2] + ourhp->xv[i0][2] + ourhp->xv[i1][2]); |
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printf("\t%.10e %.10e %.10e\n", corn[0] + ourhp->xv[i1][0], |
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corn[1] + ourhp->xv[i1][1], corn[2] + ourhp->xv[i1][2]); |
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} |
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dogrid(wn, ci, cj, wo, dfp) /* compute and write grid cell data */ |
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int wn, ci, cj, wo; |
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FILE *dfp[3]; |
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{ |
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GCOORD gc[2]; |
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COLOR cavg; |
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register int n; |
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gc[1].w = wn; gc[1].i[0] = ci; gc[1].i[1] = cj; |
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gc[0].w = wo; |
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n = 0; /* load beams in optimal order */ |
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for (gc[0].i[0] = ourhp->grid[hdwg0[gc[0].w]]; gc[0].i[0]--; ) |
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for (gc[0].i[1] = ourhp->grid[hdwg1[gc[0].w]]; gc[0].i[1]--; ) |
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gabmi[n++].b = hdbindex(ourhp, gc); |
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hdloadbeams(gabmi, n, NULL); |
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/* run beams in regular order */ |
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fprintf(dfp[0], "\n# Begin grid cell (%d,%d)\n", ci, cj); |
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fprintf(dfp[1], "\n# Begin grid cell (%d,%d)\n", ci, cj); |
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fprintf(dfp[2], "\n# Begin grid cell (%d,%d)\n", ci, cj); |
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for (gc[0].i[0] = 0; gc[0].i[0] < ourhp->grid[hdwg0[gc[0].w]]; |
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gc[0].i[0]++) { |
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for (gc[0].i[1] = 0; gc[0].i[1] < ourhp->grid[hdwg1[gc[0].w]]; |
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gc[0].i[1]++) { |
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avgbeam(cavg, gc); |
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fprintf(dfp[0], " %.2e", colval(cavg,RED)); |
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fprintf(dfp[1], " %.2e", colval(cavg,GRN)); |
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fprintf(dfp[2], " %.2e", colval(cavg,BLU)); |
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} |
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fputc('\n', dfp[0]); |
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fputc('\n', dfp[1]); |
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fputc('\n', dfp[2]); |
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} |
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hdflush(NULL); /* flush cache */ |
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} |
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avgbeam(cavg, gc) /* compute average beam color */ |
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COLOR cavg; |
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GCOORD gc[2]; |
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{ |
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static COLOR crun = BLKCOLOR; |
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static int ncrun = 0; |
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register BEAM *bp; |
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COLOR cray; |
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unsigned beamlen; |
| 222 |
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int ls[2][3]; |
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FVECT gp[2], wp[2]; |
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double d; |
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int n; |
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register int i; |
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bp = hdgetbeam(ourhp, hdbindex(ourhp, gc)); |
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if (bp == NULL || !bp->nrm) { /* use running average */ |
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copycolor(cavg, crun); |
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if (ncrun > 1) { |
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d = 1./ncrun; |
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scalecolor(cavg, d); |
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} |
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} else { /* use beam average */ |
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hdlseg(ls, ourhp, gc); /* get beam length */ |
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for (i = 3; i--; ) { |
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gp[0][i] = ls[0][i] + .5; |
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gp[1][i] = ls[1][i] + .5; |
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} |
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hdworld(wp[0], ourhp, gp[0]); |
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hdworld(wp[1], ourhp, gp[1]); |
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d = sqrt(dist2(wp[0], wp[1])); |
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beamlen = hdcode(ourhp, d); |
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setcolor(cavg, 0., 0., 0.); |
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n = 0; |
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for (i = bp->nrm; i--; ) { |
| 248 |
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if (hdbray(bp)[i].d < beamlen) |
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continue; /* inside section */ |
| 250 |
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colr_color(cray, hdbray(bp)[i].v); |
| 251 |
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addcolor(cavg, cray); |
| 252 |
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n++; |
| 253 |
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} |
| 254 |
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if (n > 1) { |
| 255 |
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d = 1./n; |
| 256 |
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scalecolor(cavg, d); |
| 257 |
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} |
| 258 |
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if (n) { |
| 259 |
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addcolor(crun, cavg); |
| 260 |
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ncrun++; |
| 261 |
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} |
| 262 |
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} |
| 263 |
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} |
| 264 |
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| 265 |
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| 266 |
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mkcalfile(hdk, sect) /* create .cal file */ |
| 267 |
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char *hdk; |
| 268 |
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int sect; |
| 269 |
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{ |
| 270 |
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char fname[128]; |
| 271 |
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FILE *fp; |
| 272 |
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register int i; |
| 273 |
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| 274 |
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sprintf(fname, "%s.cal", prefix); |
| 275 |
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if ((fp = fopen(fname, "w")) == NULL) { |
| 276 |
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sprintf(errmsg, "cannot open \"%s\" for writing", fname); |
| 277 |
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error(SYSTEM, errmsg); |
| 278 |
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} |
| 279 |
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fprintf(fp, |
| 280 |
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"{\n\tCoordinate calculation for section %d of holodeck \"%s\"\n}\n", |
| 281 |
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sect, hdk); |
| 282 |
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| 283 |
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fprintf(fp, "\n{ Constants }\n"); |
| 284 |
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fprintf(fp, "hox : %.7e; hoy : %.7e; hoz : %.7e;\n", |
| 285 |
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ourhp->orig[0], ourhp->orig[1], ourhp->orig[2]); |
| 286 |
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fprintf(fp, "grid(i) : select(i+1, %d, %d, %d);\n", |
| 287 |
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ourhp->grid[0], ourhp->grid[1], ourhp->grid[2]); |
| 288 |
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fprintf(fp, "hwgx(i) : select(i+1, %.7e, %.7e, %.7e);\n", |
| 289 |
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ourhp->wg[0][0], ourhp->wg[1][0], ourhp->wg[2][0]); |
| 290 |
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fprintf(fp, "hwgy(i) : select(i+1, %.7e, %.7e, %.7e);\n", |
| 291 |
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ourhp->wg[0][1], ourhp->wg[1][1], ourhp->wg[2][1]); |
| 292 |
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fprintf(fp, "hwgz(i) : select(i+1, %.7e, %.7e, %.7e);\n", |
| 293 |
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ourhp->wg[0][2], ourhp->wg[1][2], ourhp->wg[2][2]); |
| 294 |
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fprintf(fp, "hwo(i) : select(i+1, %.7e, %.7e, %.7e,\n", |
| 295 |
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ourhp->wo[0], ourhp->wo[1], ourhp->wo[2]); |
| 296 |
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fprintf(fp, "\t\t%.7e, %.7e, %.7e);\n", |
| 297 |
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ourhp->wo[3], ourhp->wo[4], ourhp->wo[5]); |
| 298 |
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fprintf(fp, |
| 299 |
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"wgp(i,x,y,z) : (x-hox)*hwgx(i) + (y-hoy)*hwgy(i) + (z-hoz)*hwgz(i);\n"); |
| 300 |
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fprintf(fp, "wg0(w) : select(.5*w+.75, 1, 2, 0);\n"); |
| 301 |
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fprintf(fp, "wg1(w) : select(.5*w+.75, 2, 0, 1);\n"); |
| 302 |
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| 303 |
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fprintf(fp, "\n{ Variables }\n"); |
| 304 |
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fprintf(fp, "nw = arg(1); ow = arg(2);\n"); |
| 305 |
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fprintf(fp, "oax = .5*ow-.25;\n"); |
| 306 |
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fprintf(fp, "ng0 = wg0(nw); ng1 = wg1(nw);\n"); |
| 307 |
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fprintf(fp, "og0 = wg0(ow); og1 = wg1(ow);\n"); |
| 308 |
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fprintf(fp, |
| 309 |
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"odenom = Dx*hwgx(oax) + Dy*hwgy(oax) + Dz*hwgz(oax);\n"); |
| 310 |
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fprintf(fp, "odist = if(and(FTINY-odenom, FTINY+odenom), -1,\n"); |
| 311 |
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fprintf(fp, |
| 312 |
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"\t\t(Px*hwgx(oax) + Py*hwgy(oax) + Pz*hwgz(oax) - hwo(ow))/odenom);\n"); |
| 313 |
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fprintf(fp, |
| 314 |
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"opx = Px - odist*Dx; opy = Py - odist*Dy; opz = Pz - odist*Dz;\n"); |
| 315 |
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fprintf(fp, "nu = wgp(ng0,Px,Py,Pz);\n"); |
| 316 |
|
|
fprintf(fp, "nv = wgp(ng1,Px,Py,Pz);\n"); |
| 317 |
|
|
fprintf(fp, "ou = wgp(og0,opx,opy,opz);\n"); |
| 318 |
|
|
fprintf(fp, "ov = wgp(og1,opx,opy,opz);\n"); |
| 319 |
|
|
fprintf(fp, "f(v) = if(and(and(ou-FTINY,grid(og0)-ou-FTINY),\n"); |
| 320 |
|
|
fprintf(fp, "\t\tand(ov-FTINY,grid(og1)-ov-FTINY)), if(v,v,0), 1);\n"); |
| 321 |
|
|
fclose(fp); |
| 322 |
|
|
} |
| 323 |
|
|
|
| 324 |
|
|
|
| 325 |
|
|
eputs(s) /* put error message to stderr */ |
| 326 |
|
|
register char *s; |
| 327 |
|
|
{ |
| 328 |
|
|
static int midline = 0; |
| 329 |
|
|
|
| 330 |
|
|
if (!*s) |
| 331 |
|
|
return; |
| 332 |
|
|
if (!midline++) { /* prepend line with program name */ |
| 333 |
|
|
fputs(progname, stderr); |
| 334 |
|
|
fputs(": ", stderr); |
| 335 |
|
|
} |
| 336 |
|
|
fputs(s, stderr); |
| 337 |
|
|
if (s[strlen(s)-1] == '\n') { |
| 338 |
|
|
fflush(stderr); |
| 339 |
|
|
midline = 0; |
| 340 |
|
|
} |
| 341 |
|
|
} |
