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455 lines
9.7 KiB
Markdown
455 lines
9.7 KiB
Markdown
---
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title: XPlanet
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layout: default
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created: 2009-02-17 09:24:01 +0100
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updated: 2012-02-15 15:10:04 +0100
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toc: false
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tags:
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- know-how
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- software
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- linux
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- xplanet
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---
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XPlanet renders an Earth globe including actual clouds and satellites' positions. It also has data to render the moon,
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mars or the sun. You can even put the image on your Desktop so that it shows the current Earth view from space instead
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of a boring wallpaper.
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To make things a bit easier, there's [this Python script](http://ubuntuforums.org/showpost.php?s=dba5c223bddb4c7d1e119ad00225548d&p=258035&postcount=6)
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which handles downloading new cloudmaps and updating the image. I re-wrote that thing to pure Bash:
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handle-xplanet.sh
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=================
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{% highlight bash %}
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#!/bin/sh
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# Script for using xplanet in Gnome
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# made after http://ubuntuforums.org/showpost.php?p=259290&postcount=10
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# XPlanet configuration
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BODY="-body earth -latitude 52.51667 -longitude 13.41667"
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SCREEN="-geometry 2560x1024 -center +1920+512 -radius 75"
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STARS="-starmap /usr/share/xplanet/stars/BSC -marker_file /usr/share/xplanet/markers/brightStars -arc_file /usr/share/xplanet/arcs/constellations"
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# other configuration
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TMPDIR="/tmp"
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PREFIX="xplanet-"
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ORIGINAL="${TMPDIR}/${PREFIX}original.png"
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OPTIONS="-config /opt/xplanet/xplanet.conf $BODY $SCREEN $STARS -ephemeris_file ephemeris/unxp1800.406"
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TIMING="-wait 300 -hibernate 600"
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if [ $# -gt 0 ]; then
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# Update data
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./update-cloudmap.sh
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./update-satellites.sh
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# Update picture
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for f in ${TMPDIR}/${PREFIX}background-*.png; do
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rm $f
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done
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TIME=`date +"%s"`
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BGFILE="${TMPDIR}/${PREFIX}background-${TIME}.png"
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mv $ORIGINAL $BGFILE
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# set background picture
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gconftool-2 -t str -s /desktop/gnome/background/picture_filename ""
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sleep 1
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gconftool-2 -t str -s /desktop/gnome/background/picture_filename "$BGFILE"
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# following line is for Compiz
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# dbus-send --print-reply --type=method_call --dest=org.freedesktop.compiz /org/freedesktop/compiz/cube/screen0/backgrounds org.freedesktop.compiz.set array:string:"$BGFILE"
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else
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# Initialize
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/usr/bin/nice -19 /usr/bin/xplanet $TIMING -output "$ORIGINAL" $OPTIONS -post_command "/opt/xplanet/handle-xplanet.sh update"
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fi
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{% endhighlight %}
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This script makes use of the following two helper scripts.
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update-cloudmap.sh
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==================
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{% highlight bash %}
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#!/bin/sh
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CLOUDFILE="clouds.jpg"
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URLLIST="update-cloudmap.lst"
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UPDATE=$((3*60*60))
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URL=`head -n 2 $URLLIST | tr "\n" " "`
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NOW=`date +"%s"`
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MTIME=`stat -c "%Y" $CLOUDFILE`
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DIFF=$((NOW - MTIME))
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. ./colors.sh
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echo "${BOLD}Cloudmap$NORMAL is $BOLD$BLUE$DIFF$NORMAL seconds old (outdated after $UPDATE)."
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DOUPDATE=0
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if [ ! -e $CLOUDFILE ]; then
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echo "$BOLD${RED}File not found.$NORMAL"
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DOUPDATE=1
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fi
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if [ $DIFF -ge $UPDATE ]; then
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echo "$BOLD${YELLOW}File is outdated.$NORMAL"
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DOUPDATE=1
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fi
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if [ "$1" = "-f" ]; then
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echo "$BOLD${GREEN}Update forced.$NORMAL"
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DOUPDATE=1
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fi
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if [ $DOUPDATE = 1 ]; then
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aria2c $URL --allow-overwrite=true -o $CLOUDFILE
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{% endhighlight %}
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This one reads the URL to download from a file `update-cloudmap.lst`:
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~~~
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http://userpage.fu-berlin.de/~jml/clouds_4096.jpg
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http://www.ruwenzori.net/earth/clouds_4096.jpg
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http://www.narrabri.atnf.csiro.au/operations/NASA/clouds_4096.jpg
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http://userpage.fu-berlin.de/~jml/clouds_2048.jpg
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http://rcswww.urz.tu-dresden.de/~es179238/clouds_2048.jpg
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http://xplanet.dyndns.org/clouds/clouds_2048.jpg
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http://www.ruwenzori.net/earth/clouds_2048.jpg
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http://xplanet.arculeo.com/clouds_2048.jpg
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http://xplanet.sourceforge.net/clouds/clouds_2048.jpg
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ftp://mirror.pacific.net.au/xplanet/clouds_2048.jpg
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http://www.narrabri.atnf.csiro.au/operations/NASA/clouds_2048.jpg
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http://home.megapass.co.kr/~gitto88/cloud_data/clouds_2048.jpg
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http://home.megapass.co.kr/~holywatr/cloud_data/clouds_2048.jpg
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http://home.megapass.co.kr/~ysy00/cloud_data/clouds_2048.jpg
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http://user.chol.com/~winxplanet/cloud_data/clouds_2048.jpg
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ftp://ftp.iastate.edu/pub/xplanet/clouds_2048.jpg
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http://xplanet.explore-the-world.net/clouds_2048.jpg
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~~~
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update-satellites.sh
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====================
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{% highlight bash %}
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#!/bin/sh
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TLEFILE="satellites/iss+.tle"
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UPDATE=$((12*60*60))
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FILES="stations.txt science.txt"
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BASEURL="http://www.celestrak.com/NORAD/elements/"
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NOW=`date +"%s"`
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MTIME=`stat -c "%Y" $TLEFILE`
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DIFF=$((NOW - MTIME))
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URLS=""
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for f in $FILES; do
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URLS="$URLS $BASEURL$f"
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done
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. ./colors.sh
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echo "${BOLD}Satellite$NORMAL data is $BOLD$BLUE$DIFF$NORMAL seconds old (outdated after $UPDATE)."
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DOUPDATE=0
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if [ ! -e $TLEFILE ]; then
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echo "$BOLD${RED}File not found.$NORMAL"
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DOUPDATE=1
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fi
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if [ $DIFF -ge $UPDATE ]; then
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echo "$BOLD${YELLOW}File is outdated.$NORMAL"
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DOUPDATE=1
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fi
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if [ "$1" = "-f" ]; then
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echo "$BOLD${GREEN}Update forced.$NORMAL"
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DOUPDATE=1
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fi
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if [ $DOUPDATE = 1 ]; then
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wget -O $TLEFILE $URLS
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# aria2c $URL --allow-overwrite=true -o $TLEFILE
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{% endhighlight %}
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colors.sh
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=========
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This is a helper script which provides ANSI colors through variables.
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{% highlight bash %}
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#!/bin/sh
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TPUT=/usr/bin/tput
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NORMAL=`$TPUT sgr0`
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BOLD=`$TPUT bold`
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BLINK=`$TPUT blink`
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RED=`$TPUT setaf 1`
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GREEN=`$TPUT setaf 2`
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YELLOW=`$TPUT setaf 3`
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BLUE=`$TPUT setaf 4`
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MAGENTA=`$TPUT setaf 5`
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CYAN=`$TPUT setaf 6`
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WHITE=`$TPUT setaf 7`
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{% endhighlight %}
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get-ephemeris.sh
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================
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This script has to be run only once since the ephemeris is valid for several years.
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{% highlight bash %}
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#!/bin/sh
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wget -r ftp://ssd.jpl.nasa.gov/pub/eph/export/unix/* -P ephemeris/ --no-passive-ftp -nd -c
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{% endhighlight %}
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xplanet.conf
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============
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Finally the configuration file for XPlanet: `xplanet.conf`.
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{% highlight ini %}
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# This file contains options you might want to customize for each
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# body. It's best to leave this file alone and modify a copy. Use the
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# -config option to tell xplanet to read your copy.
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[default] # Values in this section apply to all
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# bodies unless overridden below.
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arc_color=gray
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#arc_file=
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#bump_map=
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bump_scale=1
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cloud_gamma=1
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#cloud_map=
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cloud_ssec=false # true if the cloud map is from the
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# University of Wisconsin Space
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# Science and Engineering Center
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cloud_threshold=90
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color={255,255,255} # fallback color in case an image map
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# isn't found
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draw_orbit=false # if true, draw this body's orbit
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# about its primary
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grid=false
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grid1=6
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grid2=15
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#image=
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magnify=1 # draw the body as if its radius were
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# magnified by this factor
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marker_color=yellow
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#marker_file=
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#marker_font=
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marker_fontsize=8
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max_radius_for_label=3 # don't draw a label if the body's
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# radius in pixels is more than this
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min_radius_for_label=.01 # don't draw a label if the body's
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# radius in pixels is less than this
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min_radius_for_markers=40 # don't draw markers if the body's
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# radius in pixels is less than this
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#night_map=
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orbit={-.5,.5,2} # extent of orbit to draw,
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# {start, end, delta}, where
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# start and end are in units of period
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# of revolution and delta is angular
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# increment in degrees to evaluate
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# position
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orbit_color={255,255,255} # color for the orbit
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random_origin=true # Can this body be considered if
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# -origin random is used?
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random_target=true # Can this body be considered if
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# -target random is used?
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#satellite_file=
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shade=30 # 0 = black, 100 = same as dayside
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#specular_map=
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text_color={255,0,0} # color for text (markers & body label)
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twilight=6 # blend the day and night images for
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# pixels within this many degrees of
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# the terminator
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[sun]
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"Sun"
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color={255,255,166}
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max_radius_for_label=0 # never draw a label for the sun
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shade=100 # No night side!
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map=maps/sun/map.jpg
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[mercury]
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"Mercury"
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color={100, 100, 100}
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min_radius_for_label=0 # always draw a label
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[venus]
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"Venus"
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color={161, 129, 70}
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min_radius_for_label=0
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[earth]
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"Earth"
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color={28, 82, 110}
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cloud_map=clouds.jpg
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bump_map=maps/earth/bump.jpg
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map=maps/earth/map.jpg
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night_map=maps/earth/night.jpg
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# I have day and night maps of Australia centered on Alice Springs,
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# which are cropped from higher resolution maps.
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#map=alice_springs.png
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#night_map=alice_springs_night.png
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#mapbounds={-1.2,98.7107,-46.2,169.023} # lat1, lon1, lat2, lon2
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#marker_file=capitals.mark
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marker_file=earth
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min_radius_for_label=0
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satellite_file=satellites/iss+
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[moon]
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"Moon"
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color={100, 100, 100}
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map=maps/moon/map.jpg
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bump_map=maps/moon/bump.jpg
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marker_file=moon
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[mars]
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"Mars"
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color={172, 123, 67}
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map=maps/mars/map.jpg
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min_radius_for_label=0
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marker_file=mars
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[phobos]
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"Phobos"
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[deimos]
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"Deimos"
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[jupiter]
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"Jupiter"
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color={204, 163, 133}
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min_radius_for_label=0
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[io]
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"Io"
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color={212, 182, 52}
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[europa]
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"Europa"
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color={140, 140, 140}
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[ganymede]
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"Ganymede"
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color={150, 150, 150}
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[callisto]
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"Callisto"
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color={70, 70, 70}
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[saturn]
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"Saturn"
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color={244, 199, 134}
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min_radius_for_label=0
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[mimas]
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"Mimas"
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[enceladus]
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"Enceladus"
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[tethys]
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"Tethys"
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[dione]
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"Dione"
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[rhea]
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"Rhea"
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[titan]
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"Titan"
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color={252,94,7}
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[hyperion]
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"Hyperion"
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[iapetus]
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"Iapetus"
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[phoebe]
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"Phoebe"
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[uranus]
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"Uranus"
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color={105, 197, 238}
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min_radius_for_label=0
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[miranda]
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"Miranda"
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[ariel]
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"Ariel"
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[umbriel]
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"Umbriel"
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[titania]
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"Titania"
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[oberon]
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"Oberon"
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[neptune]
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"Neptune"
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color={95, 133, 232}
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min_radius_for_label=0
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[triton]
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"Triton"
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[nereid]
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"Nereid"
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[pluto]
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"Pluto"
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color={206, 180, 153}
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min_radius_for_label=0
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[charon]
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"Charon"
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{% endhighlight %}
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