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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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|
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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 */ |
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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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|
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double dstrsrc = 0.0; /* square source distribution */ |
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double shadthresh = .01; /* shadow threshold */ |
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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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COLOR ambval = BLKCOLOR; /* ambient value */ |
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double ambacc = 0.2; /* ambient accuracy */ |
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int ambres = 128; /* ambient resolution */ |
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int ambres = 32; /* ambient resolution */ |
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int ambdiv = 128; /* ambient divisions */ |
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int ambssamp = 0; /* ambient super-samples */ |
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int ambounce = 0; /* ambient bounces */ |
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double pctdone = 0.0; /* percentage done */ |
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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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#define pixjitter() (.5+dstrpix*(.5-frandom())) |
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double pixvalue(); |
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|
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quit(code) /* quit program */ |
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int code; |
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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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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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render(oldfile) /* render the scene */ |
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char *oldfile; |
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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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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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|
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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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ourview.hresolu -= ourview.hresolu % psample; |
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ourview.vresolu -= ourview.vresolu % psample; |
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|
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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+1)*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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error(SYSTEM, "out of memory in render"); |
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goto memerr; |
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} |
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|
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/* open z file */ |
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if (zfile != 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(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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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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printf("-Y %d +X %d\n", ourview.vresolu, ourview.hresolu); |
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|
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ypos = ourview.vresolu - salvage(oldfile); /* find top line */ |
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fillscanline(scanbar[0], ypos, psample); /* top scan */ |
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|
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< |
for (ypos -= psample; ypos > -psample; ypos -= psample) { |
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|
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< |
colptr = scanbar[psample]; /* get last scanline */ |
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scanbar[psample] = scanbar[0]; |
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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 (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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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 -= 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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fillscanline(scanbar[0], ypos, psample); /* base scan */ |
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|
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fillscanbar(scanbar, ypos, psample); |
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for (i = psample-1; i >= 0; i--) |
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if (fwritescan(scanbar[i], ourview.hresolu, stdout) < 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], hresolu, ypos, hstep); |
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/* fill bar */ |
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fillscanbar(scanbar, zbar, hresolu, 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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#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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hresolu*sizeof(float)) |
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< hresolu*sizeof(float)) |
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goto writerr; |
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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 (fflush(stdout) == EOF) |
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goto writerr; |
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pctdone = 100.0*(ourview.vresolu-ypos)/ourview.vresolu; |
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> |
/* record progress */ |
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pctdone = 100.0*(vresolu-1-ypos)/vresolu; |
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if (ralrm > 0 && time((long *)0) >= tlastrept+ralrm) |
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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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#endif |
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} |
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< |
|
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> |
/* clean up */ |
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> |
if (zfd != -1) { |
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> |
if (write(zfd, (char *)zbar[0], hresolu*sizeof(float)) |
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> |
< hresolu*sizeof(float)) |
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> |
goto writerr; |
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> |
if (close(zfd) == -1) |
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> |
goto writerr; |
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> |
for (i = 0; i <= psample; i++) |
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> |
free((char *)zbar[i]); |
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} |
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> |
fwritescan(scanbar[0], hresolu, stdout); |
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> |
if (fflush(stdout) == EOF) |
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> |
goto writerr; |
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for (i = 0; i <= psample; i++) |
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free((char *)scanbar[i]); |
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+ |
pctdone = 100.0; |
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return; |
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writerr: |
| 240 |
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error(SYSTEM, "write error in render"); |
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+ |
memerr: |
| 242 |
+ |
error(SYSTEM, "out of memory in render"); |
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} |
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|
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|
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< |
fillscanline(scanline, y, xstep) /* fill scan line at y */ |
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> |
fillscanline(scanline, zline, xres, y, xstep) /* fill scan line at y */ |
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register COLOR *scanline; |
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< |
int y, xstep; |
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> |
register float *zline; |
| 249 |
> |
int xres, y, xstep; |
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{ |
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+ |
static int nc = 0; /* number of calls */ |
| 252 |
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int b = xstep; |
| 253 |
+ |
double z; |
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register int i; |
| 255 |
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|
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< |
pixvalue(scanline[0], 0, y); |
| 257 |
< |
|
| 258 |
< |
for (i = xstep; i <= ourview.hresolu; i += xstep) { |
| 259 |
< |
|
| 260 |
< |
pixvalue(scanline[i], i, y); |
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> |
z = pixvalue(scanline[0], 0, y); |
| 257 |
> |
if (zline) zline[0] = z; |
| 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; |
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> |
} |
| 264 |
> |
z = pixvalue(scanline[i], i, y); |
| 265 |
> |
if (zline) zline[i] = z; |
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|
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< |
b = fillsample(scanline+i-xstep, i-xstep, y, xstep, 0, b/2); |
| 267 |
> |
b = fillsample(scanline+i-xstep, zline ? zline+i-xstep : NULL, |
| 268 |
> |
i-xstep, y, xstep, 0, b/2); |
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} |
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} |
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|
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|
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< |
fillscanbar(scanbar, y, ysize) /* fill interior */ |
| 273 |
> |
fillscanbar(scanbar, zbar, xres, y, ysize) /* fill interior */ |
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register COLOR *scanbar[]; |
| 275 |
< |
int y, ysize; |
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> |
register float *zbar[]; |
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> |
int xres, y, ysize; |
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{ |
| 278 |
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COLOR vline[MAXDIV+1]; |
| 279 |
+ |
float zline[MAXDIV+1]; |
| 280 |
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int b = ysize; |
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register int i, j; |
| 282 |
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|
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< |
for (i = 0; i < ourview.hresolu; i++) { |
| 283 |
> |
for (i = 0; i < xres; i++) { |
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|
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copycolor(vline[0], scanbar[0][i]); |
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copycolor(vline[ysize], scanbar[ysize][i]); |
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+ |
if (zbar[0]) { |
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+ |
zline[0] = zbar[0][i]; |
| 289 |
+ |
zline[ysize] = zbar[ysize][i]; |
| 290 |
+ |
} |
| 291 |
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|
| 292 |
< |
b = fillsample(vline, i, y, 0, ysize, b/2); |
| 292 |
> |
b = fillsample(vline, zbar[0] ? zline : NULL, |
| 293 |
> |
i, y, 0, ysize, b/2); |
| 294 |
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|
| 295 |
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for (j = 1; j < ysize; j++) |
| 296 |
|
copycolor(scanbar[j][i], vline[j]); |
| 297 |
+ |
if (zbar[0]) |
| 298 |
+ |
for (j = 1; j < ysize; j++) |
| 299 |
+ |
zbar[j][i] = zline[j]; |
| 300 |
|
} |
| 301 |
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} |
| 302 |
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|
| 303 |
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|
| 304 |
|
int |
| 305 |
< |
fillsample(colline, x, y, xlen, ylen, b) /* fill interior points */ |
| 305 |
> |
fillsample(colline, zline, x, y, xlen, ylen, b) /* fill interior points */ |
| 306 |
|
register COLOR *colline; |
| 307 |
+ |
register float *zline; |
| 308 |
|
int x, y; |
| 309 |
|
int xlen, ylen; |
| 310 |
|
int b; |
| 311 |
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{ |
| 312 |
+ |
extern double fabs(); |
| 313 |
|
double ratio; |
| 314 |
+ |
double z; |
| 315 |
|
COLOR ctmp; |
| 316 |
|
int ncut; |
| 317 |
|
register int len; |
| 324 |
|
if (len <= 1) /* limit recursion */ |
| 325 |
|
return(0); |
| 326 |
|
|
| 327 |
< |
if (b > 0 || bigdiff(colline[0], colline[len], maxdiff)) { |
| 327 |
> |
if (b > 0 |
| 328 |
> |
|| (zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
| 329 |
> |
|| bigdiff(colline[0], colline[len], maxdiff)) { |
| 330 |
|
|
| 331 |
< |
pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
| 331 |
> |
z = pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
| 332 |
> |
if (zline) zline[len>>1] = z; |
| 333 |
|
ncut = 1; |
| 334 |
|
|
| 335 |
|
} else { /* interpolate */ |
| 337 |
|
copycolor(colline[len>>1], colline[len]); |
| 338 |
|
ratio = (double)(len>>1) / len; |
| 339 |
|
scalecolor(colline[len>>1], ratio); |
| 340 |
< |
copycolor(ctmp, colline[0]); |
| 340 |
> |
if (zline) zline[len>>1] = zline[len] * ratio; |
| 341 |
|
ratio = 1.0 - ratio; |
| 342 |
+ |
copycolor(ctmp, colline[0]); |
| 343 |
|
scalecolor(ctmp, ratio); |
| 344 |
|
addcolor(colline[len>>1], ctmp); |
| 345 |
+ |
if (zline) zline[len>>1] += zline[0] * ratio; |
| 346 |
|
ncut = 0; |
| 347 |
|
} |
| 348 |
|
/* recurse */ |
| 349 |
< |
ncut += fillsample(colline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
| 349 |
> |
ncut += fillsample(colline, zline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
| 350 |
|
|
| 351 |
< |
ncut += fillsample(colline + (len>>1), x + (xlen>>1), y + (ylen>>1), |
| 352 |
< |
xlen - (xlen>>1), ylen - (ylen>>1), b/2); |
| 351 |
> |
ncut += fillsample(colline+(len>>1), zline ? zline+(len>>1) : NULL, |
| 352 |
> |
x+(xlen>>1), y+(ylen>>1), |
| 353 |
> |
xlen-(xlen>>1), ylen-(ylen>>1), b/2); |
| 354 |
|
|
| 355 |
|
return(ncut); |
| 356 |
|
} |
| 357 |
|
|
| 358 |
|
|
| 359 |
+ |
double |
| 360 |
|
pixvalue(col, x, y) /* compute pixel value */ |
| 361 |
|
COLOR col; /* returned color */ |
| 362 |
|
int x, y; /* pixel position */ |
| 363 |
|
{ |
| 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 |
|
|
| 372 |
|
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
| 373 |
< |
|
| 373 |
> |
|
| 374 |
> |
samplendx = pixnumber(x,y,hresolu,vresolu); /* set pixel index */ |
| 375 |
> |
|
| 376 |
|
rayvalue(&thisray); /* trace ray */ |
| 377 |
|
|
| 378 |
|
copycolor(col, thisray.rcol); /* return color */ |
| 379 |
+ |
|
| 380 |
+ |
return(thisray.rt); /* return distance */ |
| 381 |
|
} |
| 382 |
|
|
| 383 |
|
|
| 391 |
|
|
| 392 |
|
if (oldfile == NULL) |
| 393 |
|
return(0); |
| 394 |
< |
else if ((fp = fopen(oldfile, "r")) == NULL) { |
| 394 |
> |
|
| 395 |
> |
if ((fp = fopen(oldfile, "r")) == NULL) { |
| 396 |
|
sprintf(errmsg, "cannot open recover file \"%s\"", oldfile); |
| 397 |
|
error(WARNING, errmsg); |
| 398 |
|
return(0); |
| 400 |
|
/* discard header */ |
| 401 |
|
getheader(fp, NULL); |
| 402 |
|
/* get picture size */ |
| 403 |
< |
if (fscanf(fp, "-Y %d +X %d\n", &y, &x) != 2) { |
| 403 |
> |
if (!fscnresolu(&x, &y, fp)) { |
| 404 |
|
sprintf(errmsg, "bad recover file \"%s\"", oldfile); |
| 405 |
|
error(WARNING, errmsg); |
| 406 |
|
fclose(fp); |
| 407 |
|
return(0); |
| 408 |
|
} |
| 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); |
| 276 |
– |
return(0); |
| 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 |
|
} |
