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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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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Compute Glare Index given by program name or -t option: |
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* |
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* 19 April 1993 R. Compagnon EPFL (added dgi, brs_gi, ugr) |
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*/ |
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#include <string.h> |
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#include "standard.h" |
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#include "view.h" |
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int argc; |
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char *argv[]; |
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{ |
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extern char *rindex(); |
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struct named_func *funp; |
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char *progtail; |
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int i; |
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/* get program name */ |
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progname = argv[0]; |
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progtail = rindex(progname, '/'); /* final component */ |
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progtail = strrchr(progname, '/'); /* final component */ |
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if (progtail == NULL) |
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progtail = progname; |
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else |
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{ |
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register struct glare_src *gs; |
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FVECT mydir,testdir[7],vhor; |
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double r,omega,p[7],sum; |
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double r,posn,omega,p[7],sum; |
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int i,n; |
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spinvector(mydir, midview.vdir, midview.vup, gd->ang); |
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fvsum(testdir[4],testdir[4],midview.vup,-0.866*r); |
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for (i = 0; i < 7; i++) { |
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normalize(testdir[i]); |
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p[i] = pow(posindex(testdir[i],mydir,midview.vup),-2.0); |
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if (p[i] <= FTINY) p[i] = 0.0; |
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posn = posindex(testdir[i],mydir,midview.vup); |
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if (posn <= FTINY) |
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p[i] = 0.0; |
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else |
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p[i] = 1./(posn*posn); |
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} |
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r = 1-gs->dom/2./PI; |
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omega = gs->dom*p[0]; |