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#!/bin/csh -f |
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# SCCSid "$SunId$ SGI" |
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# |
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# Compute best ambient value for a scene and append to rad input file |
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# |
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while ( $#argv > 1 ) |
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switch ( $argv[1] ) |
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case -e: |
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set doexpos |
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breaksw |
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case -c: |
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set docolor |
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breaksw |
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default: |
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goto userr |
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endsw |
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shift argv |
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end |
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userr: |
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if ( $#argv != 1 ) then |
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echo Usage: $0 [-e][-c] rad_input_file |
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exit 1 |
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endif |
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onintr quit |
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set tf=/usr/tmp/ca$$ |
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set oct=`rad -w -s -e -v 0 $argv[1] QUA=High AMB=$tf.amb OPT=$tf.opt | sed -n 's/^OCTREE= //p'` |
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rad -n -s -V $argv[1] \ |
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| rpict @$tf.opt -av 0 0 0 -aw 16 -dv- -S 1 -x 16 -y 16 -ps 1 $oct \ |
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| ra_rgbe - '\!pvalue -h -H -d' > $tf.dat |
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if ( $?doexpos ) then |
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(echo -n 'EXPOSURE= '; \ |
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total -u $tf.dat | rcalc -e '$1=1/(.265*$1+.670*$2+.065*$3)') \ |
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>> $argv[1] |
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endif |
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lookamb -h -d $tf.amb | rcalc -e '$1=$10;$2=$11;$3=$12' >> $tf.dat |
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set lavg=`rcalc -e '$1=lum;lum=.265*$1+.670*$2+.065*$3;cond=lum-1e-5' $tf.dat | total -m -p` |
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if ( $?docolor ) then |
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set cavg=(`total -m $tf.dat`) |
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set av=(`rcalc -n -e "r=$cavg[1];g=$cavg[2];b=$cavg[3];sf=$lavg/(.265*r+.670*g+.065*b)" -e '$1=sf*r;$2=sf*g;$3=sf*b'`) |
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else |
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set av=($lavg $lavg $lavg) |
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endif |
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echo "render= -av $av" >> $argv[1] |
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quit: |
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exec rm -f $tf.{amb,opt,dat} |
