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greg |
3.1 |
#!/bin/csh -f
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greg |
3.2 |
# RCSid: $Id$
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greg |
3.1 |
#
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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
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