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#!/bin/csh -f |
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# SCCSid "$SunId$ LBL" |
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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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if ($#argv >= 1) then |
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set glarefile=$argv[1] |
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else |
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set glarefile=$nofile |
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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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|
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set gndxfile="glr$$.ndx" |
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set plotfile="glr$$.plt" |
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set tempfiles=($gndxfile $plotfile) |
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|
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alias readvar 'echo -n Enter \!:1 "[$\!:1]: ";set ans="$<";if("$ans" != "")set \!:1="$ans"' |
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|
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onintr quit |
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|
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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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|
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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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|
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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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|
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_EOF_ |
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readvar picture |
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readvar octree |
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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 -vf $picture) |
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endif |
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set fgargs=($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 $octree" |
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exit 1 |
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endif |
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cat <<_EOF_ |
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|
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With an octree, you should give the same options for -av, -ab and |
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so forth as are used to render the scene. Please enter them below. |
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|
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_EOF_ |
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readvar rtargs |
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set fgargs=($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 $fgargs) |
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endif |
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endif |
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cat <<_EOF_ |
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|
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Glare sources are determined by a threshold level. Any part of the |
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view that is above this threshold is considered to be part of a glare |
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source. If you do not choose a threshold value, it will be set auto- |
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matically to 7 times the average field luminance (in candelas/sq.meter). |
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|
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_EOF_ |
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echo -n "Do you wish to set the glare threshold manually? " |
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if ("$<" =~ [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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|
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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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|
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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 > $glarefile |
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endif |
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if ($?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 $glarefile |
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endif |
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set ndxnam=("Guth Visual Comfort Probability" "Guth Disability Glare Ratio" "CIE Glare Index") |
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set ndxcom=("glarendx -t guth_vcp" "glarendx -t guth_dgr" "glarendx -t cie_cgi") |
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set bcdlvl=(50 124 18.5) |
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while ( 1 ) |
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echo "" |
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echo " 0. Quit" |
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set i=1 |
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while ($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 |
