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/* Copyright (c) 1995 Regents of the University of California */ |
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/* Copyright (c) 1999 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
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/* |
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#define PACKSIZ 256 /* max. calculation packet size */ |
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#define RTCOM "rtrace -h- -ovl -fff " |
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#define RTCOM "rtrace -h- -ovl -fff -ld- -i- -I- " |
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#define ABS(x) ((x)>0?(x):-(x)) |
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COLOR backcolor = BLKCOLOR; /* background color (float) */ |
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double backz = 0.0; /* background z value */ |
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int normdist = 1; /* i/o normalized distance? */ |
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char ourfmt[LPICFMT+1] = PICFMT; /* original picture format */ |
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double ourexp = -1; /* original picture exposure */ |
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int expadj = 0; /* exposure adjustment (f-stops) */ |
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double rexpadj = 1; /* real exposure adjustment */ |
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#define childpid (PDesc[2]) |
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unsigned short queue[PACKSIZ][2]; /* pending pixels */ |
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int packsiz; /* actual packet size */ |
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int queuesiz; /* number of pixels pending */ |
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int queuesiz = 0; /* number of pixels pending */ |
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extern double movepixel(); |
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rexpadj = pow(2.0, (double)expadj); |
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} |
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/* set view */ |
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if (nextview(doblur ? stdin : NULL) == EOF) { |
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if (nextview(doblur ? stdin : (FILE *)NULL) == EOF) { |
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fprintf(stderr, "%s: no view on standard input!\n", |
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progname); |
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exit(1); |
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ourexp = rexpadj; |
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if (ourexp < .995 | ourexp > 1.005) |
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fputexpos(ourexp, stdout); |
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fputformat(COLRFMT, stdout); |
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if (strcmp(ourfmt, PICFMT)) /* print format if known */ |
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fputformat(ourfmt, stdout); |
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putc('\n', stdout); |
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/* write picture */ |
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writepicture(); |
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} |
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int |
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headline(s) /* process header string */ |
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char *s; |
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{ |
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char fmt[32]; |
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if (isheadid(s)) |
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return; |
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return(0); |
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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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if (globmatch(ourfmt, fmt)) { |
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wrongformat = 0; |
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strcpy(ourfmt, fmt); |
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} else |
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wrongformat = 1; |
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return(0); |
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} |
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if (nvavg < 2) { |
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putc('\t', stdout); |
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} |
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if (isexpos(s)) { |
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theirexp *= exposval(s); |
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return; |
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return(0); |
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} |
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if (isview(s) && sscanview(&theirview, s) > 0) |
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gotview++; |
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return(0); |
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} |
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{ |
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FVECT pt, tdir, odir; |
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double d; |
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register int i; |
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if (pos[2] <= 0) /* empty pixel */ |
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return(0); |
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return(0); |
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if (!averaging) |
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return(1); |
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if (ourview.type == VT_PAR) /* compute our direction */ |
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VCOPY(odir, ourview.vdir); |
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else |
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for (i = 0; i < 3; i++) |
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odir[i] = (pt[i] - ourview.vp[i])/pos[2]; |
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d = DOT(odir,tdir); /* compute pixel weight */ |
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if (d >= 1.-1./MAXWT/MAXWT) |
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/* compute pixel weight */ |
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if (ourview.type == VT_PAR) { |
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d = DOT(ourview.vdir,tdir); |
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d = 1. - d*d; |
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} else { |
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VSUB(odir, pt, ourview.vp); |
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d = DOT(odir,tdir); |
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d = 1. - d*d/DOT(odir,odir); |
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} |
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if (d <= 1./MAXWT/MAXWT) |
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return(MAXWT); /* clip to maximum weight */ |
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return(1./sqrt(1.-d)); |
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return(1./sqrt(d)); |
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} |
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for (x = 0; x < hresolu; x++) |
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if (zscan(y)[x] <= 0) |
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(*fill)(x,y); |
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if (fill == rcalfill) |
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clearqueue(); |
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} |
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} |
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/* mark end and get results */ |
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bzero((char *)fbp, 6*sizeof(float)); |
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if (process(PDesc, fbuf, fbuf, 4*sizeof(float)*queuesiz, |
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if (process(PDesc, fbuf, fbuf, 4*sizeof(float)*(queuesiz+1), |
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6*sizeof(float)*(queuesiz+1)) != |
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4*sizeof(float)*queuesiz) { |
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4*sizeof(float)*(queuesiz+1)) { |
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fprintf(stderr, "%s: error reading from rtrace process\n", |
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progname); |
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exit(1); |
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if (averaging) { |
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setcolor(sscan(queue[i][1])[queue[i][0]], |
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fbp[0], fbp[1], fbp[2]); |
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wscan(queue[i][1])[queue[i][0]] = MAXWT; |
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wscan(queue[i][1])[queue[i][0]] = 1; |
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} else |
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setcolr(pscan(queue[i][1])[queue[i][0]], |
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fbp[0], fbp[1], fbp[2]); |