From 9ec0b02148363742768cc5cf5698b67a8ea19cfd Mon Sep 17 00:00:00 2001
From: Jogi Hofmüller <jogi@mur.at>
Date: Tue, 9 Aug 2011 19:02:08 +0000
Subject: - we are tracking ARISSAT-1 now ;)

git-svn-id: https://svn.spreadspace.org/mur.sat@106 7de4ea59-55d0-425e-a1af-a3118ea81d4c
---
 tools/mmd/MmdWidgets.py | 95 +++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 85 insertions(+), 10 deletions(-)

(limited to 'tools/mmd/MmdWidgets.py')

diff --git a/tools/mmd/MmdWidgets.py b/tools/mmd/MmdWidgets.py
index 4f0d582..accb87e 100644
--- a/tools/mmd/MmdWidgets.py
+++ b/tools/mmd/MmdWidgets.py
@@ -3,8 +3,54 @@ web widgets for MURSAT1 Dashboard
 """
 
 import time
+import ephem
 from MmdLocation import Location
 
+def createJavaArray (jarray, name):
+  astring = '''var {0} = new Array ('''.format (name)
+  for e in jarray:
+    astring = '''{0}\n\t{1}'''.format (astring, e)
+  astring = '''{0}\n);'''.format (astring)
+  return astring
+
+def dms2degdec (lonlat):
+  parts = lonlat.split (':')
+  if len (parts) != 3:
+    return 0.0
+  degrees = float (parts[0])
+  fraction =  (float (parts[1]) * 60.0 + float (parts[2])) / 3600
+  if parts[0][0] == '-':
+    return degrees - fraction
+  return degrees + fraction
+
+def computeTrajectory (longitude, latitude, elevation):
+  """
+  test for static TLE to trajectory computation
+  """
+  line0 = "ARISSAT-1/RADIOSCAF-B"
+  line1 = "1 37772U 98067CK  11220.22334818  .00031592  00000-0  37647-3 0   118"
+  line2 = "2 37772  51.6391 258.8215 0013530  58.1430  19.7106 15.60689826   619"
+
+  sat = ephem.readtle (line0, line1, line2)
+  graz = ephem.Observer ()
+  graz.long, graz.lat, graz.elevation = longitude, latitude, elevation
+
+  sat.compute (graz)
+  array_string = 'new OpenLayers.LonLat ({0}, {1}).transform (from, to){2}'
+  longitude = dms2degdec (sat.sublong.__str__ ())
+  latitude = dms2degdec (sat.sublat.__str__ ())
+  java_array = [array_string.format (dms2degdec (sat.sublong.__str__ ()), dms2degdec (sat.sublat.__str__ ()), ',')]
+  for i in range (12 * 24):
+    graz.date += 5 * ephem.minute
+    sat.compute (graz)
+    java_array.append (array_string.format (dms2degdec (sat.sublong.__str__ ()), dms2degdec (sat.sublat.__str__ ()), ','))
+
+  graz.date += 5 * ephem.minute
+  sat.compute (graz)
+  java_array.append (array_string.format (dms2degdec (sat.sublong.__str__ ()), dms2degdec (sat.sublat.__str__ ()), ''))
+
+  return  longitude, latitude, createJavaArray (java_array, 'trajectory')
+
 def loginFormWidget ():
   html = '''
    Please enter your email and password in the form below.
@@ -155,30 +201,59 @@ def osmWidget (satellite, user):
   user_location = user.getDefaultLocation ()
   if not user_location:
     user_location = Location ()
+  longitude, latitude, java = computeTrajectory (user_location.longitude, user_location.latitude, 300)
+
+  #
+  # how can we use { and } in javascript that can be ignored by python format ()?
+  #
   html = '''
   <div id="osm"></div>
   <script src="http://www.openlayers.org/api/OpenLayers.js"></script>
   <script>
+    // satellite and user position
     var from = new OpenLayers.Projection ("EPSG:4326");
     var to = new OpenLayers.Projection ("EPSG:900913");
-    var satellite = new OpenLayers.LonLat ({0}, {1}).transform (from, to);
+    var sat_position = new OpenLayers.LonLat ({0}, {1}).transform (from, to);
     var user_location = new OpenLayers.LonLat ({2}, {3}).transform (from, to);
 
     // create a map
-    map = new OpenLayers.Map ("osm");
+    var map = new OpenLayers.Map ("osm");
     map.addLayer (new OpenLayers.Layer.OSM ());
 
-    // set a marker
-    var markers = new OpenLayers.Layer.Markers ("Markers");
-    map.addLayer (markers);
-    markers.addMarker (new OpenLayers.Marker (satellite));
-    markers.addMarker (new OpenLayers.Marker (user_location));
+    // create a markers
+    var markersLayer = new OpenLayers.Layer.Markers ("Markers");
+    var sat = new OpenLayers.Marker (sat_position);
+    var user = new OpenLayers.Marker (user_location);
+    user.setOpacity (0.5);
+    map.addLayer (markersLayer);
+    markersLayer.addMarker (sat);
+    markersLayer.addMarker (user);
+
+    // array build by python ;)
+    {4}
+
+    // points/polygons
+    var lineLayer = new OpenLayers.Layer.Vector ("Polygons");
+    map.addLayer (lineLayer);
+    map.addControl (new OpenLayers.Control.DrawFeature(lineLayer, OpenLayers.Handler.Path));
+
+    var points = new Array (new OpenLayers.Geometry.Point (sat_position.lon, sat_position.lat));
+
+    for (var i = 0; i < trajectory.length; i++)
+    {{
+      points.push (new OpenLayers.Geometry.Point (trajectory[i].lon, trajectory[i].lat));
+    }}
+
+    var polygon = new OpenLayers.Geometry.LineString (points);
+    var lineStyle = {{strokeColor: '#00ff00', strokeOpacity: 1, strokeWidth: 2}};
+    var lineFeature = new OpenLayers.Feature.Vector (polygon, null, lineStyle);
+    lineLayer.addFeatures ([lineFeature]);
 
     // center the map
-    map.setCenter (user_location, 2);
+    map.setCenter (sat_position, 2);
+    
   </script>
-  <!-- lon: {2} lat: {3} -->
-  '''.format (satellite['longitude'], satellite['latitude'], user_location.longitude, user_location.latitude)
+  '''.format (longitude, latitude, user_location.longitude, user_location.latitude, java)
 
   return html
 
-- 
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