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/* Copyright (c) 1986 Regents of the University of California */ |
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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#include <sys/resource.h> |
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#endif |
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|
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#include <signal.h> |
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#include <fcntl.h> |
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|
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#include "view.h" |
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|
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#include "resolu.h" |
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|
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#include "random.h" |
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|
29 |
< |
VIEW ourview = STDVIEW(512); /* view parameters */ |
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int dimlist[MAXDIM]; /* sampling dimensions */ |
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int ndims = 0; /* number of sampling dimensions */ |
31 |
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int samplendx; /* sample index number */ |
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|
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VIEW ourview = STDVIEW; /* view parameters */ |
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int hresolu = 512; /* horizontal resolution */ |
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int vresolu = 512; /* vertical resolution */ |
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double pixaspect = 1.0; /* pixel aspect ratio */ |
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|
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int psample = 4; /* pixel sample size */ |
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double maxdiff = .05; /* max. difference for interpolation */ |
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double dstrpix = 0.67; /* square pixel distribution */ |
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double dstrsrc = 0.0; /* square source distribution */ |
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double shadthresh = .05; /* shadow threshold */ |
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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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double srcsizerat = .25; /* maximum ratio source size/dist. */ |
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|
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int maxdepth = 6; /* maximum recursion depth */ |
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double minweight = 5e-3; /* minimum ray weight */ |
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|
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double pctdone = 0.0; /* percentage done */ |
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|
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long tlastrept = 0L; /* time at last report */ |
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|
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extern long time(); |
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extern long tstart; /* starting time */ |
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|
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extern long nrays; /* number of rays traced */ |
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|
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#define MAXDIV 32 /* maximum sample size */ |
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#define MAXDIV 15 /* maximum sample size */ |
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|
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#define pixjitter() (.5+dstrpix*(.5-frandom())) |
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|
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} |
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|
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#ifdef BSD |
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report() /* report progress */ |
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{ |
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#ifdef BSD |
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struct rusage rubuf; |
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double t; |
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|
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|
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sprintf(errmsg, "%ld rays, %4.2f%% done after %5.4f CPU hours\n", |
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nrays, pctdone, t/3600.0); |
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eputs(errmsg); |
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tlastrept = time((long *)0); |
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} |
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#else |
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sprintf(errmsg, "%ld rays, %4.2f%% done\n", nrays, pctdone); |
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#endif |
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report() /* report progress */ |
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{ |
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signal(SIGALRM, report); |
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tlastrept = time((long *)0); |
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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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|
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if (ralrm > 0) |
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alarm(ralrm); |
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} |
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#endif |
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|
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|
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render(zfile, oldfile) /* render the scene */ |
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char *zfile, *oldfile; |
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{ |
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extern long lseek(); |
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COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
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float *zbar[MAXDIV+1]; /* z values */ |
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int ypos; /* current scanline */ |
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FILE *zfp; |
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int ystep; /* current y step size */ |
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int hstep; /* h step size */ |
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int zfd; |
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COLOR *colptr; |
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float *zptr; |
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register int i; |
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/* check sampling */ |
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if (psample < 1) |
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psample = 1; |
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else if (psample > MAXDIV) |
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else if (psample > MAXDIV) { |
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sprintf(errmsg, "pixel sampling reduced from %d to %d", |
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psample, MAXDIV); |
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error(WARNING, errmsg); |
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psample = MAXDIV; |
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} |
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/* allocate scanlines */ |
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for (i = 0; i <= psample; i++) { |
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scanbar[i] = (COLOR *)malloc(ourview.hresolu*sizeof(COLOR)); |
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scanbar[i] = (COLOR *)malloc(hresolu*sizeof(COLOR)); |
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if (scanbar[i] == NULL) |
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goto memerr; |
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} |
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/* open z file */ |
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if (zfile != NULL) { |
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if ((zfp = fopen(zfile, "a+")) == NULL) { |
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if ((zfd = open(zfile, O_WRONLY|O_CREAT, 0666)) == -1) { |
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sprintf(errmsg, "cannot open z file \"%s\"", zfile); |
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error(SYSTEM, errmsg); |
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} |
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for (i = 0; i <= psample; i++) { |
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zbar[i] = (float *)malloc(ourview.hresolu*sizeof(float)); |
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zbar[i] = (float *)malloc(hresolu*sizeof(float)); |
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if (zbar[i] == NULL) |
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goto memerr; |
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} |
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} else { |
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zfp = NULL; |
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zfd = -1; |
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for (i = 0; i <= psample; i++) |
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zbar[i] = NULL; |
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} |
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/* write out boundaries */ |
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fputresolu(YMAJOR|YDECR, ourview.hresolu, ourview.vresolu, stdout); |
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fprtresolu(hresolu, vresolu, stdout); |
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/* recover file and compute first */ |
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i = salvage(oldfile); |
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if (zfp != NULL && fseek(zfp, (long)i*ourview.hresolu*sizeof(float), 0) == EOF) |
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if (zfd != -1 && i > 0 && |
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lseek(zfd, (long)i*hresolu*sizeof(float), 0) == -1) |
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error(SYSTEM, "z file seek error in render"); |
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ypos = ourview.vresolu-1 - i; |
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fillscanline(scanbar[0], zbar[0], ourview.hresolu, ypos, psample); |
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pctdone = 100.0*i/vresolu; |
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if (ralrm > 0) /* report init stats */ |
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report(); |
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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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ypos = vresolu-1 - i; |
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hstep = (psample*140+49)/99; /* quincunx sampling */ |
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ystep = (psample*99+70)/140; |
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fillscanline(scanbar[0], zbar[0], hresolu, ypos, hstep); |
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/* compute scanlines */ |
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for (ypos -= psample; ypos >= 0; ypos -= psample) { |
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|
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pctdone = 100.0*(ourview.vresolu-ypos-psample)/ourview.vresolu; |
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|
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colptr = scanbar[psample]; /* move base to top */ |
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scanbar[psample] = scanbar[0]; |
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for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
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/* bottom adjust? */ |
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if (ypos < 0) { |
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ystep += ypos; |
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ypos = 0; |
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} |
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colptr = scanbar[ystep]; /* move base to top */ |
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scanbar[ystep] = scanbar[0]; |
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scanbar[0] = colptr; |
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zptr = zbar[psample]; |
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zbar[psample] = zbar[0]; |
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zptr = zbar[ystep]; |
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zbar[ystep] = zbar[0]; |
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zbar[0] = zptr; |
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/* fill base line */ |
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fillscanline(scanbar[0], zbar[0], ourview.hresolu, ypos, psample); |
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fillscanline(scanbar[0], zbar[0], hresolu, ypos, hstep); |
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/* fill bar */ |
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fillscanbar(scanbar, zbar, ourview.hresolu, ypos, psample); |
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fillscanbar(scanbar, zbar, hresolu, ypos, ystep); |
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/* write it out */ |
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for (i = psample; i > 0; i--) { |
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if (zfp != NULL && fwrite(zbar[i],sizeof(float),ourview.hresolu,zfp) != ourview.hresolu) |
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#ifndef BSD |
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signal(SIGALRM, 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], |
205 |
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hresolu*sizeof(float)) |
206 |
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< hresolu*sizeof(float)) |
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goto writerr; |
208 |
< |
if (fwritescan(scanbar[i],ourview.hresolu,stdout) < 0) |
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> |
if (fwritescan(scanbar[i], hresolu, stdout) < 0) |
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goto writerr; |
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} |
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if (zfp != NULL && fflush(zfp) == EOF) |
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goto writerr; |
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if (fflush(stdout) == EOF) |
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goto writerr; |
213 |
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/* record progress */ |
214 |
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pctdone = 100.0*(vresolu-1-ypos)/vresolu; |
215 |
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if (ralrm > 0 && time((long *)0) >= tlastrept+ralrm) |
216 |
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report(); |
217 |
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#ifndef BSD |
218 |
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else |
219 |
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signal(SIGALRM, report); |
220 |
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#endif |
221 |
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} |
166 |
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/* compute residual */ |
167 |
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colptr = scanbar[psample]; |
168 |
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scanbar[psample] = scanbar[0]; |
169 |
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scanbar[0] = colptr; |
170 |
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zptr = zbar[psample]; |
171 |
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zbar[psample] = zbar[0]; |
172 |
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zbar[0] = zptr; |
173 |
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if (ypos > -psample) { |
174 |
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fillscanline(scanbar[-ypos], zbar[-ypos], ourview.hresolu, |
175 |
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0, psample); |
176 |
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fillscanbar(scanbar-ypos, zbar-ypos, ourview.hresolu, |
177 |
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0, psample+ypos); |
178 |
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} |
179 |
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for (i = psample; i+ypos >= 0; i--) { |
180 |
– |
if (zfp != NULL && fwrite(zbar[i],sizeof(float),ourview.hresolu,zfp) != ourview.hresolu) |
181 |
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goto writerr; |
182 |
– |
if (fwritescan(scanbar[i], ourview.hresolu, stdout) < 0) |
183 |
– |
goto writerr; |
184 |
– |
} |
222 |
|
/* clean up */ |
223 |
< |
if (zfp != NULL) { |
224 |
< |
if (fclose(zfp) == EOF) |
223 |
> |
if (zfd != -1) { |
224 |
> |
if (write(zfd, (char *)zbar[0], hresolu*sizeof(float)) |
225 |
> |
< hresolu*sizeof(float)) |
226 |
|
goto writerr; |
227 |
+ |
if (close(zfd) == -1) |
228 |
+ |
goto writerr; |
229 |
|
for (i = 0; i <= psample; i++) |
230 |
|
free((char *)zbar[i]); |
231 |
|
} |
232 |
+ |
fwritescan(scanbar[0], hresolu, stdout); |
233 |
|
if (fflush(stdout) == EOF) |
234 |
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goto writerr; |
235 |
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for (i = 0; i <= psample; i++) |
248 |
|
register float *zline; |
249 |
|
int xres, y, xstep; |
250 |
|
{ |
251 |
+ |
static int nc = 0; /* number of calls */ |
252 |
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int b = xstep; |
253 |
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double z; |
254 |
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register int i; |
255 |
|
|
256 |
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z = pixvalue(scanline[0], 0, y); |
257 |
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if (zline) zline[0] = z; |
258 |
< |
|
259 |
< |
for (i = xstep; i < xres; i += xstep) { |
260 |
< |
|
258 |
> |
/* zig-zag start for quincunx pattern */ |
259 |
> |
for (i = nc++ & 1 ? xstep/2 : xstep; i < xres-1+xstep; i += xstep) { |
260 |
> |
if (i >= xres) { |
261 |
> |
xstep += xres-1-i; |
262 |
> |
i = xres-1; |
263 |
> |
} |
264 |
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z = pixvalue(scanline[i], i, y); |
265 |
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if (zline) zline[i] = z; |
266 |
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|
267 |
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b = fillsample(scanline+i-xstep, zline ? zline+i-xstep : NULL, |
268 |
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i-xstep, y, xstep, 0, b/2); |
269 |
|
} |
225 |
– |
if (i-xstep < xres-1) { |
226 |
– |
z = pixvalue(scanline[xres-1], xres-1, y); |
227 |
– |
if (zline) zline[xres-1] = z; |
228 |
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fillsample(scanline+i-xstep, zline ? zline+i-xstep : NULL, |
229 |
– |
i-xstep, y, xres-1-(i-xstep), 0, b/2); |
230 |
– |
} |
270 |
|
} |
271 |
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|
272 |
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|
278 |
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COLOR vline[MAXDIV+1]; |
279 |
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float zline[MAXDIV+1]; |
280 |
|
int b = ysize; |
242 |
– |
double z; |
281 |
|
register int i, j; |
282 |
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|
283 |
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for (i = 0; i < xres; i++) { |
361 |
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COLOR col; /* returned color */ |
362 |
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int x, y; /* pixel position */ |
363 |
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{ |
364 |
< |
static RAY thisray; /* our ray for this pixel */ |
364 |
> |
static RAY thisray; |
365 |
|
|
366 |
< |
rayview(thisray.rorg, thisray.rdir, &ourview, |
367 |
< |
x + pixjitter(), y + pixjitter()); |
366 |
> |
if (viewray(thisray.rorg, thisray.rdir, &ourview, |
367 |
> |
(x+pixjitter())/hresolu, (y+pixjitter())/vresolu) < 0) { |
368 |
> |
setcolor(col, 0.0, 0.0, 0.0); |
369 |
> |
return(0.0); |
370 |
> |
} |
371 |
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|
372 |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
373 |
< |
|
373 |
> |
|
374 |
> |
samplendx = pixnumber(x,y,hresolu,vresolu); /* set pixel index */ |
375 |
> |
|
376 |
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rayvalue(&thisray); /* trace ray */ |
377 |
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|
378 |
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copycolor(col, thisray.rcol); /* return color */ |
379 |
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|
380 |
< |
return(thisray.rot); /* return distance */ |
380 |
> |
return(thisray.rt); /* return distance */ |
381 |
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} |
382 |
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|
383 |
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|
400 |
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/* discard header */ |
401 |
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getheader(fp, NULL); |
402 |
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/* get picture size */ |
403 |
< |
if (fgetresolu(&x, &y, fp) != (YMAJOR|YDECR)) { |
403 |
> |
if (!fscnresolu(&x, &y, fp)) { |
404 |
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sprintf(errmsg, "bad recover file \"%s\"", oldfile); |
405 |
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error(WARNING, errmsg); |
406 |
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fclose(fp); |
407 |
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return(0); |
408 |
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} |
409 |
|
|
410 |
< |
if (x != ourview.hresolu || y != ourview.vresolu) { |
410 |
> |
if (x != hresolu || y != vresolu) { |
411 |
|
sprintf(errmsg, "resolution mismatch in recover file \"%s\"", |
412 |
|
oldfile); |
413 |
|
error(USER, errmsg); |
414 |
|
} |
415 |
|
|
416 |
< |
scanline = (COLR *)malloc(ourview.hresolu*sizeof(COLR)); |
416 |
> |
scanline = (COLR *)malloc(hresolu*sizeof(COLR)); |
417 |
|
if (scanline == NULL) |
418 |
|
error(SYSTEM, "out of memory in salvage"); |
419 |
< |
for (y = 0; y < ourview.vresolu; y++) { |
420 |
< |
if (freadcolrs(scanline, ourview.hresolu, fp) < 0) |
419 |
> |
for (y = 0; y < vresolu; y++) { |
420 |
> |
if (freadcolrs(scanline, hresolu, fp) < 0) |
421 |
|
break; |
422 |
< |
if (fwritecolrs(scanline, ourview.hresolu, stdout) < 0) |
422 |
> |
if (fwritecolrs(scanline, hresolu, stdout) < 0) |
423 |
|
goto writerr; |
424 |
|
} |
425 |
|
if (fflush(stdout) == EOF) |
430 |
|
return(y); |
431 |
|
writerr: |
432 |
|
error(SYSTEM, "write error in salvage"); |
433 |
+ |
} |
434 |
+ |
|
435 |
+ |
|
436 |
+ |
int |
437 |
+ |
pixnumber(x, y, xres, yres) /* compute pixel index (brushed) */ |
438 |
+ |
register int x, y; |
439 |
+ |
int xres, yres; |
440 |
+ |
{ |
441 |
+ |
x -= y; |
442 |
+ |
while (x < 0) |
443 |
+ |
x += xres; |
444 |
+ |
return((((x>>2)*yres + y) << 2) + (x & 3)); |
445 |
|
} |