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#!/bin/csh -f
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# RCSid: $Id$
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#
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# Interactive program for calculating glare values
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#
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set fgargs=(-v)
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set nofile="none"
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set octree=$nofile
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set picture=$nofile
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set glarefile=$nofile
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if ($#argv >= 1) then
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set glarefile=$argv[1]
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if ($#argv >= 2) then
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set picture=$argv[2]
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if ($#argv >= 3) then
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set octree=$argv[3]
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endif
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endif
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endif
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set rtargs=
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set view=
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set threshold=300
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set maxangle=0
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set stepangle=10
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set gndxfile="glr$$.ndx"
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set plotfile="glr$$.plt"
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set tempfiles=($gndxfile $plotfile)
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alias readvar 'echo -n Enter \!:1 "[$\!:1]: ";set ans="$<";if("$ans" != "")set \!:1="$ans"'
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onintr quit
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cat <<_EOF_
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This script provides a convenient interface to the glare calculation
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and analysis programs. It works on a single output file from findglare,
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which you must either create here or have created already before.
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_EOF_
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while ( $glarefile == $nofile )
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echo ""
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echo "Please specify a glare file, or use ^C to exit."
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readvar glarefile
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end
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if ( ! -f $glarefile ) then
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echo ""
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echo -n "The glare file '$glarefile' doesn't exist -- shall we create it? "
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if ("$<" =~ [nN]*) exit 0
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cat <<_EOF_
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A glare file can be created from a wide-angle Radiance picture (preferably
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a fisheye view), an octree, or both. Computing glare source locations
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from a finished image is faster, but using an octree is more reliable
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since all of the scene information is there. Whenever it is possible,
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you should use both a picture and an octree to compute the glare file.
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You must also have a viewpoint and direction for the glare calculation.
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If the viewpoint is not the same as the picture, an error will result.
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If no view is specified, the view parameters are taken from the picture,
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so the view specification is optional unless you are starting from an
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octree.
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_EOF_
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if ( $picture == $nofile ) then
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readvar picture
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endif
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if ( $octree == $nofile ) then
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readvar octree
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endif
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readvar view
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if ( $picture == $nofile && $octree == $nofile ) then
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echo "You must specify a picture or an octree"
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exit 1
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endif
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if ( $picture == $nofile && "$view" == "" ) then
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echo "You must give a view if there is no picture"
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exit 1
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endif
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if ( $picture != $nofile ) then
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if ( ! -r $picture ) then
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echo "Cannot read $picture"
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exit 1
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endif
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set fgargs=($fgargs -p $picture)
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if ( "$view" != "" ) then
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set view=(-vf $picture $view)
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endif
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endif
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set fgargs=($fgargs $view)
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if ( $octree != $nofile ) then
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if ( ! -r $octree ) then
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echo "Cannot read $octree"
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exit 1
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endif
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cat <<_EOF_
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With an octree, you should give the same options for -av, -ab and
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so forth as are used to render the scene. Please enter them below.
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_EOF_
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if ($picture != $nofile) then
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echo "These are the parameters from the picture:"
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getinfo $picture
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endif
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readvar rtargs
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set fgargs=($fgargs $rtargs $octree)
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endif
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echo ""
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echo -n "Do you expect glare sources in the scene to be small? "
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if ("$<" =~ [yY]) then
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echo -n "Very small? "
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if ("$<" =~ [yY]) then
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set fgargs=(-r 400 $fgargs)
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else
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set fgargs=(-r 250 $fgargs)
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endif
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echo -n "Are these sources relatively bright? "
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if ("$<" =~ [nN]*) then
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set fgargs=(-c $fgargs)
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endif
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endif
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cat <<_EOF_
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Glare sources are determined by a threshold level. Any part of the
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view that is above this threshold is considered to be part of a glare
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source. If you do not choose a threshold value, it will be set auto-
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matically to 7 times the average field luminance (in candelas/sq.meter).
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_EOF_
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echo -n "Do you wish to set the glare threshold manually? "
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if ("$<" =~ [yY]) then
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readvar threshold
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set fgargs=(-t $threshold $fgargs)
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endif
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cat <<_EOF_
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It is often desirable to know how glare changes as a function of
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viewing direction. If you like, you can compute glare for up
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to 180 degrees to the left and right of the view center. Enter
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the maximum angle that you would like to compute below.
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_EOF_
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readvar maxangle
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if ( $maxangle >= $stepangle ) then
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set fgargs=(-ga $stepangle-$maxangle\:$stepangle $fgargs)
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endif
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echo ""
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echo "Starting calculation..."
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echo findglare $fgargs
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findglare $fgargs > $glarefile
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if ($status) then
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echo "Uh-oh. Something went wrong with findglare\!"
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rm $glarefile
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exit 1
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endif
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endif
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if ($?DISPLAY && $picture != $nofile) then
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echo ""
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echo "Displaying glare sources in '$picture'..."
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xglaresrc $picture $glarefile
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endif
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set ndxnam=("Guth Visual Comfort Probability" "Guth Disability Glare Ratio" "CIE Glare Index" "BRS Glare Index" "Unified Glare Rating" "Daylight Glare Index")
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set ndxcom=("glarendx -t guth_vcp" "glarendx -t guth_dgr" "glarendx -t cie_cgi" "glarendx -t brs_gi" "glarendx -t ugr" "glarendx -t dgi")
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set bcdlvl=(50 124 18.5 18.5 18.5 21.7)
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while ( 1 )
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echo ""
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echo " 0. Quit"
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set i=1
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while ($i <= $#ndxnam)
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echo " $i. $ndxnam[$i]"
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@ i++
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end
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echo ""
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set choice=0
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readvar choice
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if ($choice < 1 || $choice > $#ndxcom) goto quit
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$ndxcom[$choice] $glarefile > $gndxfile
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echo ""
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echo $ndxnam[$choice]
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echo "Angle Value"
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getinfo - < $gndxfile
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echo ""
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set save_file=$nofile
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readvar save_file
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if ($save_file != $nofile) then
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cp -i $gndxfile $save_file
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endif
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if ( `getinfo - < $gndxfile | wc -l` > 4 ) then
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echo ""
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echo -n "Do you want to plot this data? "
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if ( "$<" =~ [yY]* ) then
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set subtitle="$view"
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if ($picture != $nofile) then
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set subtitle="$picture $subtitle"
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else if ($octree != $nofile) then
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set subtitle="$subtitle $octree"
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endif
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if ( "$subtitle" == "" ) then
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set subtitle="`getinfo < $glarefile | grep findglare`"
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endif
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cat <<_EOF_ > $plotfile
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include=line.plt
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include=polar.plt
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title="$ndxnam[$choice]"
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subtitle="$subtitle"
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Bdata=
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0 $bcdlvl[$choice]
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360 $bcdlvl[$choice]
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;
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Blabel="BCD level"
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Adata=
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_EOF_
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getinfo - < $gndxfile >> $plotfile
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igraph $plotfile
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endif
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endif
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end
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quit:
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rm -f $tempfiles
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exit 0
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