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#include "paths.h" |
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#define RFTEMPLATE "rfXXXXXX" |
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#ifndef SIGCONT |
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#define SIGCONT SIGIO |
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#endif |
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|
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int dimlist[MAXDIM]; /* sampling dimensions */ |
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int ndims = 0; /* number of sampling dimensions */ |
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int samplendx; /* sample index number */ |
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double shadcert = .5; /* shadow certainty */ |
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int directrelay = 1; /* number of source relays */ |
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int vspretest = 512; /* virtual source pretest density */ |
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int directinvis = 0; /* sources invisible? */ |
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int directvis = 1; /* sources visible? */ |
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double srcsizerat = .25; /* maximum ratio source size/dist. */ |
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double specthresh = .15; /* specular sampling threshold */ |
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#define pixjitter() (.5+dstrpix*(.5-frandom())) |
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#define RFTEMPLATE "rfXXXXXX" |
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#define HFTEMPLATE TEMPLATE |
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static char *hfname = NULL; /* header file name */ |
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static FILE *hfp = NULL; /* header file pointer */ |
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static int hres, vres; /* resolution for this frame */ |
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extern char *mktemp(); |
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{ |
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if (code) /* report status */ |
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report(); |
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if (hfname != NULL) { /* delete header file */ |
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if (hfp != NULL) |
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fclose(hfp); |
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unlink(hfname); |
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} |
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headclean(); /* delete header file */ |
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pfclean(); /* clean up persist files */ |
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exit(code); |
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} |
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sprintf(errmsg, "%ld rays, %4.2f%% done after %5.4f hours\n", |
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nrays, pctdone, (tlastrept-tstart)/3600.0); |
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eputs(errmsg); |
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signal(SIGALRM, report); |
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signal(SIGCONT, report); |
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} |
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#endif |
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openheader() /* save standard output to header file */ |
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{ |
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hfname = mktemp(HFTEMPLATE); |
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if (freopen(hfname, "w", stdout) == NULL) { |
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sprintf(errmsg, "cannot open header file \"%s\"", hfname); |
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error(SYSTEM, errmsg); |
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} |
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} |
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|
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closeheader() /* done with header output */ |
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{ |
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if (hfname == NULL) |
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return; |
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if (fflush(stdout) == EOF || (hfp = fopen(hfname, "r")) == NULL) |
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error(SYSTEM, "error reopening header file"); |
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#ifdef MSDOS |
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setmode(fileno(hfp), O_BINARY); |
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#endif |
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} |
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dupheader() /* repeat header on standard output */ |
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{ |
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register int c; |
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|
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if (fseek(hfp, 0L, 0) < 0) |
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error(SYSTEM, "seek error on header file"); |
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while ((c = getc(hfp)) != EOF) |
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putchar(c); |
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} |
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|
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|
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rpict(seq, pout, zout, prvr) /* generate image(s) */ |
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int seq; |
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char *pout, *zout, *prvr; |
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* sequenced file naming. |
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*/ |
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{ |
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extern char *rindex(), *strncpy(), *strcat(); |
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extern char *rindex(), *strncpy(), *strcat(), *strcpy(); |
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char fbuf[128], fbuf2[128]; |
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register char *cp; |
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RESOLU rs; |
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double pa; |
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/* finished writing header */ |
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closeheader(); |
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/* check sampling */ |
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if (psample < 1) |
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psample = 1; |
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error(USER, "unexpected EOF on view input"); |
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prvr = fbuf; /* mark for renaming */ |
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} |
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if (pout != NULL) { |
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if (pout != NULL & prvr != NULL) { |
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sprintf(fbuf, pout, seq); |
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if (prvr != NULL && !strcmp(prvr, fbuf)) { /* rename */ |
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fbuf2[0] = '\0'; |
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if ((cp = rindex(fbuf, '/')) != NULL) |
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strncpy(fbuf2, fbuf, cp-fbuf+1); |
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strcat(fbuf2, RFTEMPLATE); |
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if (!strcmp(prvr, fbuf)) { /* rename */ |
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strcpy(fbuf2, fbuf); |
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for (cp = fbuf2; *cp; cp++) |
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; |
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while (cp > fbuf2 && !ISDIRSEP(cp[-1])) |
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cp--; |
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strcpy(cp, RFTEMPLATE); |
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prvr = mktemp(fbuf2); |
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if (rename(fbuf, prvr) < 0 && errno != ENOENT) { |
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sprintf(errmsg, |
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#ifndef BSD |
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else |
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#endif |
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signal(SIGALRM, report); |
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signal(SIGCONT, report); |
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ypos = vres-1 - i; |
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fillscanline(scanbar[0], zbar[0], sampdens, hres, ypos, hstep); |
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/* compute scanlines */ |
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fillscanbar(scanbar, zbar, hres, ypos, ystep); |
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/* write it out */ |
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#ifndef BSD |
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signal(SIGALRM, SIG_IGN); /* don't interrupt writes */ |
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signal(SIGCONT, SIG_IGN); /* don't interrupt writes */ |
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#endif |
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for (i = ystep; i > 0; i--) { |
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if (zfd != -1 && write(zfd, (char *)zbar[i], |
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report(); |
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#ifndef BSD |
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else |
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signal(SIGALRM, report); |
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signal(SIGCONT, report); |
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#endif |
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} |
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/* clean up */ |
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signal(SIGALRM, SIG_IGN); |
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signal(SIGCONT, SIG_IGN); |
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if (zfd != -1) { |
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if (write(zfd, (char *)zbar[0], hres*sizeof(float)) |
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< hres*sizeof(float)) |
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pctdone = 100.0; |
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if (ralrm > 0) |
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report(); |
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signal(SIGCONT, SIG_DFL); |
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return; |
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writerr: |
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error(SYSTEM, "write error in render"); |
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setmode(fileno(fp), O_BINARY); |
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#endif |
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/* discard header */ |
570 |
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getheader(fp, NULL); |
570 |
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getheader(fp, NULL, NULL); |
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/* get picture size */ |
572 |
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if (!fscnresolu(&x, &y, fp)) { |
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sprintf(errmsg, "bad recover file \"%s\"", oldfile); |