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#!/bin/csh -f
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# RCSid: $Id$
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#
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# Generate source description for window with venetian blinds.
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#
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# 1/11/88 Greg Ward
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#
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# Usage: genwindow shellfile
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#
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# Takes as input the following shell variables from file $1:
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#
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# worient Window orientation (degrees from south)
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# wwidth Window width
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# wheight Window height
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# wtrans Window transmission
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# bdepth Blind depth
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# bspac Blind vertical spacing
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# gap Gap between blinds and window
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# brcurv Blind curvature radius (negative upward, zero none)
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# bangle Blind inclination (degrees from horizontal, up and out)
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# material Blind material type (metal or plastic)
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# ucolor Blind up side color ("red green blue")
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# uspec Blind up side specularity (0 to 1)
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# urough Blind up side roughness (0 to .2)
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# dcolor Blind down side color (opt)
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# dspec Blind down side specularity (opt)
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# drough Blind down side roughness (opt)
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# lat Site latitude (degrees)
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# long Site longitude (degrees)
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# mer Site standard meridian (degrees)
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# hour Hour (standard 24hr time)
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# day Day (of month)
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# month Month (of year)
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# grefl Ground plane reflectance
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# sky Sky conditions (sunny, clear, cloudy)
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# nsources Number of sources to divide window
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#
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# Creates the following output files:
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#
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# stdout Window description for Radiance
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# $1.d$$ Window output distribution
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#
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if ( $#argv != 1 ) then
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echo Usage: $0 input
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exit 1
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endif
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# Set input and output files
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set input = $1
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set distrib = $1.d$$
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set tmpdir = /tmp
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set descrip = $tmpdir/gw$$.des
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set distoct = $tmpdir/gw$$.oct
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set skydesc = $tmpdir/gw$$.sky
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set remove = ( $distoct $skydesc $descrip )
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set removerr = ( $remove $distrib )
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onintr error
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# Set default values
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set worient = 0.
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set wtrans = ( .96 .96 .96 )
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set bdepth = 0.025
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set bspac = 0.0155
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set gap = 0.
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set brcurv = 0.
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set bangle = 0.
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set material = plastic
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set ucolor = ( 0.5 0.5 0.5 )
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set uspec = 0.
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set urough = 0.05
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set lat = 37.8
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set long = 122
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set mer = 120
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set hour = 12
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set day = 21
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set month = 10
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set grefl = .2
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set sky = sunny
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set nsources = 6
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# Get input
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source $input
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if ( $status ) goto error
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# Create window
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cat > $descrip <<_EOF_
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void glass clear_glass
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0
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0
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3 $wtrans
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clear_glass polygon window
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0
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0
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12
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0 0 0
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0 0 $wheight
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$wwidth 0 $wheight
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$wwidth 0 0
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void $material blind_upmat
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0
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0
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5 $ucolor $uspec $urough
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_EOF_
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if ( $status ) goto error
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# Blinds
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genblinds blind_upmat blind_up $bdepth $wwidth $wheight \
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`ev "ceil($wheight/$bspac)"` $bangle -r $brcurv \
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| xform -t $gap -$wwidth 1e-4 -rz 90 >> $descrip
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if ( $status ) goto error
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if ( $?dcolor ) then
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cat >> $descrip <<_EOF_
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void $material blind_dnmat
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0
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0
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5 $dcolor $dspec $drough
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_EOF_
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genblinds blind_dnmat blind_down $bdepth $wwidth $wheight \
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`ev "ceil($wheight/$bspac)"` $bangle -r $brcurv \
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| xform -t $gap -$wwidth 0 -rz 90 >> $descrip
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if ( $status ) goto error
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endif
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# Make sky
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switch ($sky)
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case sun*:
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set skysw = +s
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breaksw
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case clear:
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set skysw = -s
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breaksw
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case cloud*:
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set skysw = -c
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breaksw
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endsw
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dosky:
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gensky $month $day $hour $skysw -a $lat -o $long -m $mer -g $grefl \
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| xform -rz `ev "-($worient)"` > $skydesc
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if ( $skysw == +s ) then
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if ( `sed -n 13p $skydesc | rcalc -e '$1=if($3,-1,1)'` < 0 ) then
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set skysw = -s
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goto dosky
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endif
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endif
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cat >> $skydesc <<_EOF_
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skyfunc glow skyglow
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0
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0
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4 1 1 1 0
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skyglow source sky
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0
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0
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4 0 -1 0 180
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_EOF_
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# Make distribution
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oconv $skydesc $descrip > $distoct
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if ( $status ) goto error
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echo 2 5 85 9 0 340 18 > $distrib
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makedist -h -d -x1 0 1 0 -x2 0 0 1 -x3 1 0 0 -alpha 5-85:10 -beta 0-340:20 \
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-tw $bspac -th $bspac -td `ev "2*($bdepth+$gap)"` \
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-tc `ev "$wwidth/2" "$bdepth+$gap" "$wheight/2"` \
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-ab 2 -aa .1 -ad 64 -as 64 \
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-x 16 -y 16 $distoct >> $distrib
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if ( $status ) goto error
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set wsgrid = (`ev "floor(sqrt($nsources*$wwidth/$wheight)+.5)" "floor(sqrt($nsources*$wheight/$wwidth)+.5)"`)
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@ nsources = $wsgrid[1] * $wsgrid[2]
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# Print header
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cat <<_EOF_
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#
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# Window with venetian blinds
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# Created from $input `date`
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#
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# Window orientation (degrees from south): $worient
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# Window height: $wheight
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# Window width: $wwidth
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# Window transmission: $wtrans
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# Blind depth: $bdepth
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# Blind spacing: $bspac
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# Gap to window: $gap
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# Blind curvature radius: $brcurv
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# Blind inclination (degrees altitude): $bangle
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# Blind material: $material
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# Up side color: $ucolor
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# Up side specularity: $uspec
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# Up side roughness: $urough
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_EOF_
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if ( $?dcolor ) then
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cat <<_EOF_
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# Down side color: $dcolor
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# Down side specularity: $dspec
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# Down side roughness: $drough
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_EOF_
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else
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echo \#\ Down side same as up
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endif
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cat <<_EOF_
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# Latitude (degrees): $lat
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# Longitude (degrees): $long
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# Standard Meridian (degrees): $mer
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# Month Day Hour: $month $day $hour
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# Ground plane reflectance: $grefl
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# Sky condition: $sky
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# Number of window sources: $nsources
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#
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_EOF_
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# Send sources
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xform -e -rz $worient <<_EOF_
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void brightdata wdistrib
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10 noop $distrib source.cal src_theta src_phi -rx 90 -ry -90 -mx
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0
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0
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wdistrib illum willum
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0
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0
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3 1 1 1
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!gensurf willum wsource "$wwidth*t" $bdepth "$wheight*s" $wsgrid[2] $wsgrid[1]
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_EOF_
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if ( $status ) goto error
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# Send window
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xform -rz $worient $descrip
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if ( $status ) goto error
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# All done, print and exit
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rm -f $remove
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exit 0
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# Error exit
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error:
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rm -f $removerr
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exit 1
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