#! /usr/bin/ksh
# Converts multi-image NCAR gmeta into individual image files
# in gif format, needs ImageMagick and gifsicle
# $1 is the NCAR gmeta filename
# $2 is the desired startframe number 
# $3 is the desired endframe number 
# $4 is the output resolution n (one side only, units of n x 256 pixels) 
# $5 is a unique file number for the linkage to the webpage 
typeset -Z3 num
typeset -Z3 numend

PATH=/bin:/usr/bin:/usr/local/bin:/viper/home/flexpart/ncarg/bin
NCARG_ROOT=/viper/home/flexpart/ncarg
GIF_DIR="/viper/home/flexpart/public_html/fpinteractive/plots_mail"

file=$1
num=$2
numend=$3
outres=$4
web_num=$5
inres=1
rres=0
while [ $inres -le $outres ] ; do
rres=`expr $rres + 384`
inres=`expr $inres + 1`
done
med -e '1,$ split $' ${file}
while [ $num -le $numend ] ; do
$NCARG_ROOT/bin/ctrans -d sgi -quiet -res ${rres}x${rres} med${num}.ncgm > ${file}_${num}.sgi
convert ${file}_${num}.sgi $GIF_DIR/tracer_v_${web_num}.gif
rm ${file}_${num}.sgi
num=`expr $num + 1`
done
rm med*.ncgm