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#!/bin/csh -f |
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# RCSid: $Id$ |
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# |
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# Add veiling glare to picture |
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# |
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if ($#argv != 1) then |
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echo "Usage: $0 input.pic > output.pic" |
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exit 1 |
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endif |
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set ifile=$1 |
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set td=/usr/tmp |
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set gf=$td/av$$.gs |
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set cf=$td/av$$.cal |
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set tf=($gf $cf) |
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onintr quit |
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findglare -r 400 -c -p $ifile \ |
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| sed -e '1,/^BEGIN glare source$/d' -e '/^END glare source$/,$d' \ |
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> $gf |
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if ( -z $gf ) then |
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cat $ifile |
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goto quit |
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endif |
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( rcalc -e '$1=recno;$2=$1;$3=$2;$4=$3;$5=$4*$5' $gf \ |
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| tabfunc SDx SDy SDz I ; cat ) > $cf << '_EOF_' |
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N : I(0); |
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K : 9.2; { should be 9.6e-3/PI*(180/PI)^2 == 10.03 ? } |
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bound(a,x,b) : if(a-x, a, if(x-b, b, x)); |
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Acos(x) : acos(bound(-1,x,1)); |
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sq(x) : x*x; |
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mul(ct) : if(ct-cos(.5*PI/180), K/sq(.5), K/sq(180/PI)*ct/sq(Acos(ct))); |
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Dx1 = Dx(1); Dy1 = Dy(1); Dz1 = Dz(1); { minor optimization } |
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cosa(i) = SDx(i)*Dx1 + SDy(i)*Dy1 + SDz(i)*Dz1; |
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sum(i) = if(i-.5, mul(cosa(i))*I(i)+sum(i-1), 0); |
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veil = le(1)/WE * sum(N); |
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ro = ri(1) + veil; |
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go = gi(1) + veil; |
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bo = bi(1) + veil; |
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'_EOF_' |
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getinfo < $ifile | egrep '^((VIEW|EXPOSURE|PIXASPECT|PRIMARIES|COLORCORR)=|[^ ]*(rpict|rview|pinterp) )' |
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pcomb -f $cf $ifile |
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quit: |
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rm -f $tf |
