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/* Copyright (c) 1993 Regents of the University of California */ |
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/* Copyright (c) 1994 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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struct position {int x,y; float z;}; |
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|
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#define NSTEPS 64 /* number steps in overlap prescan */ |
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#define MINSTEP 4 /* minimum worthwhile preview step */ |
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|
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struct bound {int min,max;}; |
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|
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VIEW ourview = STDVIEW; /* desired view */ |
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int hresolu = 512; /* horizontal resolution */ |
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int vresolu = 512; /* vertical resolution */ |
191 |
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if (fillsamp == 1) |
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fillo &= ~F_BACK; |
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/* set view */ |
194 |
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if (err = setview(&ourview)) { |
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if ((err = setview(&ourview)) != NULL) { |
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fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
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} |
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if (ourpict == NULL || ourzbuf == NULL) |
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syserror(progname); |
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bzero((char *)ourzbuf, hresolu*vresolu*sizeof(float)); |
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/* new header */ |
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newheader("RADIANCE", stdout); |
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/* get input */ |
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for ( ; i < argc; i += 2) |
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addpicture(argv[i], argv[i+1]); |
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fillpicture(fillfunc); |
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/* close calculation */ |
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caldone(); |
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/* aft clipping */ |
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clipaft(); |
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/* add to header */ |
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printargs(argc, argv, stdout); |
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if (gotvfile) { |
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{ |
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char fmt[32]; |
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if (isformat(s)) { |
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formatval(fmt, s); |
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if (isheadid(s)) |
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return; |
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if (formatval(fmt, s)) { |
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wrongformat = strcmp(fmt, COLRFMT); |
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return; |
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} |
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COLR *scanin; |
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float *zin; |
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struct position *plast; |
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struct bound *xlim, ylim; |
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int y; |
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/* open picture file */ |
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if ((pfp = fopen(pfile, "r")) == NULL) |
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} |
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/* compute transformation */ |
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hasmatrix = pixform(theirs2ours, &theirview, &ourview); |
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/* allocate scanlines */ |
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scanin = (COLR *)malloc(scanlen(&tresolu)*sizeof(COLR)); |
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/* get z specification or file */ |
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zin = (float *)malloc(scanlen(&tresolu)*sizeof(float)); |
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plast = (struct position *)calloc(scanlen(&tresolu), |
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sizeof(struct position)); |
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if (scanin == NULL || zin == NULL || plast == NULL) |
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if (zin == NULL) |
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syserror(progname); |
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/* get z specification or file */ |
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if ((zfd = open(zspec, O_RDONLY)) == -1) { |
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double zvalue; |
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register int x; |
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if (!isfloat(zspec) || (zvalue = atof(zspec)) <= 0.0) |
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syserror(zspec); |
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exit(1); |
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for (x = scanlen(&tresolu); x-- > 0; ) |
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zin[x] = zvalue; |
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} |
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/* load image */ |
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for (y = 0; y < numscans(&tresolu); y++) { |
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/* compute transferrable perimeter */ |
317 |
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xlim = (struct bound *)malloc(numscans(&tresolu)*sizeof(struct bound)); |
318 |
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if (xlim == NULL) |
319 |
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syserror(progname); |
320 |
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if (!getperim(xlim, &ylim, zin, zfd)) { /* overlapping area? */ |
321 |
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free((char *)zin); |
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free((char *)xlim); |
323 |
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if (zfd != -1) |
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close(zfd); |
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fclose(pfp); |
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return; |
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} |
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/* allocate scanlines */ |
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scanin = (COLR *)malloc(scanlen(&tresolu)*sizeof(COLR)); |
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plast = (struct position *)calloc(scanlen(&tresolu), |
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sizeof(struct position)); |
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if (scanin == NULL | plast == NULL) |
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syserror(progname); |
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/* skip to starting point */ |
335 |
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for (y = 0; y < ylim.min; y++) |
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if (freadcolrs(scanin, scanlen(&tresolu), pfp) < 0) { |
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fprintf(stderr, "%s: read error\n", pfile); |
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exit(1); |
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} |
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if (zfd != -1 && read(zfd,(char *)zin, |
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scanlen(&tresolu)*sizeof(float)) |
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< scanlen(&tresolu)*sizeof(float)) { |
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fprintf(stderr, "%s: read error\n", zspec); |
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if (zfd != -1 && lseek(zfd, |
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(long)ylim.min*scanlen(&tresolu)*sizeof(float), 0) < 0) |
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syserror(zspec); |
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/* load image */ |
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for (y = ylim.min; y <= ylim.max; y++) { |
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if (freadcolrs(scanin, scanlen(&tresolu), pfp) < 0) { |
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fprintf(stderr, "%s: read error\n", pfile); |
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exit(1); |
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} |
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addscanline(y, scanin, zin, plast); |
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if (zfd != -1 && read(zfd, (char *)zin, |
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scanlen(&tresolu)*sizeof(float)) |
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< scanlen(&tresolu)*sizeof(float)) |
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syserror(zspec); |
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addscanline(xlim+y, y, scanin, zin, plast); |
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} |
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/* clean up */ |
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free((char *)xlim); |
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free((char *)scanin); |
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free((char *)zin); |
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free((char *)plast); |
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} |
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addscanline(y, pline, zline, lasty) /* add scanline to output */ |
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addscanline(xl, y, pline, zline, lasty) /* add scanline to output */ |
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struct bound *xl; |
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int y; |
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COLR *pline; |
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float *zline; |
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register int x; |
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lastx.z = 0; |
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for (x = scanlen(&tresolu); x-- > 0; ) { |
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for (x = xl->max; x >= xl->min; x--) { |
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pix2loc(pos, &tresolu, x, y); |
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pos[2] = zline[x]; |
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if (movepixel(pos) < 0) { |
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movepixel(pos) /* reposition image point */ |
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FVECT pos; |
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{ |
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double d0, d1; |
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FVECT pt, direc; |
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|
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if (pos[2] <= 0) /* empty pixel */ |
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return(-1); |
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if (normdist && theirview.type == VT_PER) { /* adjust distance */ |
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d0 = pos[0] + theirview.hoff - .5; |
509 |
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d1 = pos[1] + theirview.voff - .5; |
510 |
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pos[2] /= sqrt(1. + d0*d0*theirview.hn2 + d1*d1*theirview.vn2); |
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} |
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if (hasmatrix) { |
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pos[0] += theirview.hoff - .5; |
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pos[1] += theirview.voff - .5; |
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if (theirview.type == VT_PER) { |
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if (normdist) /* adjust for eye-ray distance */ |
478 |
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pos[2] /= sqrt( 1. |
479 |
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+ pos[0]*pos[0]*theirview.hn2 |
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+ pos[1]*pos[1]*theirview.vn2 ); |
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pos[0] *= pos[2]; |
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pos[1] *= pos[2]; |
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} |
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pos[1] += .5 - ourview.voff; |
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return(0); |
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} |
530 |
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if (viewray(pt, direc, &theirview, pos[0], pos[1]) < 0) |
530 |
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if (viewray(pt, direc, &theirview, pos[0], pos[1]) < -FTINY) |
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return(-1); |
532 |
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pt[0] += direc[0]*pos[2]; |
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pt[1] += direc[1]*pos[2]; |
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} |
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getperim(xl, yl, zline, zfd) /* compute overlapping image area */ |
543 |
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register struct bound *xl; |
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struct bound *yl; |
545 |
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float *zline; |
546 |
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int zfd; |
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{ |
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int step; |
549 |
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FVECT pos; |
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register int x, y; |
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/* set up step size */ |
552 |
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if (scanlen(&tresolu) < numscans(&tresolu)) |
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step = scanlen(&tresolu)/NSTEPS; |
554 |
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else |
555 |
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step = numscans(&tresolu)/NSTEPS; |
556 |
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if (step < MINSTEP) { /* not worth cropping? */ |
557 |
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yl->min = 0; |
558 |
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yl->max = numscans(&tresolu) - 1; |
559 |
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x = scanlen(&tresolu) - 1; |
560 |
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for (y = numscans(&tresolu); y--; ) { |
561 |
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xl[y].min = 0; |
562 |
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xl[y].max = x; |
563 |
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} |
564 |
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return(1); |
565 |
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} |
566 |
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yl->min = 32000; yl->max = 0; /* search for points on image */ |
567 |
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for (y = step - 1; y < numscans(&tresolu); y += step) { |
568 |
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if (zfd != -1) { |
569 |
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if (lseek(zfd, (long)y*scanlen(&tresolu)*sizeof(float), |
570 |
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0) < 0) |
571 |
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syserror("lseek"); |
572 |
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if (read(zfd, (char *)zline, |
573 |
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scanlen(&tresolu)*sizeof(float)) |
574 |
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< scanlen(&tresolu)*sizeof(float)) |
575 |
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syserror("read"); |
576 |
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} |
577 |
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xl[y].min = 32000; xl[y].max = 0; /* x max */ |
578 |
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for (x = scanlen(&tresolu); (x -= step) > 0; ) { |
579 |
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pix2loc(pos, &tresolu, x, y); |
580 |
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pos[2] = zline[x]; |
581 |
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if (movepixel(pos) == 0 && pos[0] >= 0 && |
582 |
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pos[0] < 1 && pos[1] >= 0 && |
583 |
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pos[1] < 1) { |
584 |
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xl[y].max = x + step - 1; |
585 |
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xl[y].min = x - step + 1; /* x min */ |
586 |
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if (xl[y].min < 0) |
587 |
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xl[y].min = 0; |
588 |
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for (x = step - 1; x < xl[y].max; x += step) { |
589 |
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pix2loc(pos, &tresolu, x, y); |
590 |
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pos[2] = zline[x]; |
591 |
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if (movepixel(pos) == 0 && |
592 |
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pos[0] >= 0 && |
593 |
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pos[0] < 1 && |
594 |
+ |
pos[1] >= 0 && |
595 |
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pos[1] < 1) { |
596 |
+ |
xl[y].min = x - step + 1; |
597 |
+ |
break; |
598 |
+ |
} |
599 |
+ |
} |
600 |
+ |
if (y < yl->min) /* y limits */ |
601 |
+ |
yl->min = y - step + 1; |
602 |
+ |
yl->max = y + step - 1; |
603 |
+ |
break; |
604 |
+ |
} |
605 |
+ |
} |
606 |
+ |
/* fill in between */ |
607 |
+ |
if (y < step) { |
608 |
+ |
xl[y-1].min = xl[y].min; |
609 |
+ |
xl[y-1].max = xl[y].max; |
610 |
+ |
} else { |
611 |
+ |
if (xl[y].min < xl[y-step].min) |
612 |
+ |
xl[y-1].min = xl[y].min; |
613 |
+ |
else |
614 |
+ |
xl[y-1].min = xl[y-step].min; |
615 |
+ |
if (xl[y].max > xl[y-step].max) |
616 |
+ |
xl[y-1].max = xl[y].max; |
617 |
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else |
618 |
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xl[y-1].max = xl[y-step].max; |
619 |
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} |
620 |
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for (x = 2; x < step; x++) |
621 |
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copystruct(xl+y-x, xl+y-1); |
622 |
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} |
623 |
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if (yl->max >= numscans(&tresolu)) |
624 |
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yl->max = numscans(&tresolu) - 1; |
625 |
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for (x = numscans(&tresolu) - 1; x > y; x--) /* fill bottom rows */ |
626 |
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copystruct(xl+x, xl+y); |
627 |
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return(yl->max >= yl->min); |
628 |
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} |
629 |
+ |
|
630 |
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|
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backpicture(fill, samp) /* background fill algorithm */ |
632 |
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int (*fill)(); |
633 |
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int samp; |
735 |
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} |
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|
738 |
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clipaft() /* perform aft clipping as indicated */ |
739 |
+ |
{ |
740 |
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register int x, y; |
741 |
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double tstdist; |
742 |
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double yzn2, vx; |
743 |
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|
744 |
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if (ourview.vaft <= FTINY) |
745 |
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return; |
746 |
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tstdist = ourview.vaft - ourview.vfore; |
747 |
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for (y = 0; y < vresolu; y++) { |
748 |
+ |
if (ourview.type == VT_PER) { /* adjust distance */ |
749 |
+ |
yzn2 = (y+.5)/vresolu + ourview.voff - .5; |
750 |
+ |
yzn2 = 1. + yzn2*yzn2*ourview.vn2; |
751 |
+ |
tstdist = (ourview.vaft - ourview.vfore)*sqrt(yzn2); |
752 |
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} |
753 |
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for (x = 0; x < hresolu; x++) |
754 |
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if (zscan(y)[x] > tstdist) { |
755 |
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if (ourview.type == VT_PER) { |
756 |
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vx = (x+.5)/hresolu + ourview.hoff - .5; |
757 |
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if (zscan(y)[x] <= (ourview.vaft - |
758 |
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ourview.vfore) * |
759 |
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sqrt(vx*vx*ourview.hn2 + yzn2)) |
760 |
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continue; |
761 |
+ |
} |
762 |
+ |
bzero(pscan(y)[x], sizeof(COLR)); |
763 |
+ |
zscan(y)[x] = 0.0; |
764 |
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} |
765 |
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} |
766 |
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} |
767 |
+ |
|
768 |
+ |
|
769 |
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writepicture() /* write out picture */ |
770 |
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{ |
771 |
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int y; |
851 |
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cp = combuf; |
852 |
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wp = argv; |
853 |
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for ( ; ; ) { |
854 |
< |
while (isspace(*cp)) cp++; |
855 |
< |
if (!*cp) break; |
856 |
< |
*wp++ = cp; |
857 |
< |
while (!isspace(*cp)) |
858 |
< |
if (!*cp++) goto done; |
859 |
< |
*cp++ = '\0'; |
854 |
> |
while (isspace(*cp)) /* nullify spaces */ |
855 |
> |
*cp++ = '\0'; |
856 |
> |
if (!*cp) /* all done? */ |
857 |
> |
break; |
858 |
> |
*wp++ = cp; /* add argument to list */ |
859 |
> |
while (*++cp && !isspace(*cp)) |
860 |
> |
; |
861 |
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} |
706 |
– |
done: |
862 |
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*wp = NULL; |
863 |
|
/* start process */ |
864 |
|
if ((rval = open_process(PDesc, argv)) < 0) |