70 lines
2.0 KiB
Python
70 lines
2.0 KiB
Python
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#!/usr/bin/python3
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import random
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import urllib.request
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import dash
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from dash import html
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from dash import dcc
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from dash.dependencies import Input, Output
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from datetime import datetime, timedelta
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from satellite_czml import satellite_czml
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from satellite_czml import satellite
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# Beidou
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url = 'https://celestrak.com/NORAD/elements/beidou.txt'
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apikey = open('cesium.key').read().strip()
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tles = [l.decode("utf-8").strip() for l in urllib.request.urlopen(url).readlines()]
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tle_list = [[tles[i],tles[i+1],tles[i+2]] for i,_ in enumerate(tles) if i%3==0]
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multiple_czml = satellite_czml(tle_list=tle_list).get_czml()
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# DASH
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external_css = ['https://cesium.com/downloads/cesiumjs/releases/1.76/Build/Cesium/Widgets/widgets.css']
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external_scripts = [{'src':'https://cesium.com/downloads/cesiumjs/releases/1.76/Build/Cesium/Cesium.js'}]
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app = dash.Dash(__name__,
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title='Spacecruft Beidou Earth',
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external_scripts=external_scripts,
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external_stylesheets=external_css)
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app.layout = html.Div(children=[
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html.Div(id='cesiumContainer'),
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html.Div(id='czml', style={'display': 'none'}, children=multiple_czml),
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html.Div(id='apikey', style={'display': 'none'}, children=apikey),
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])
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app.clientside_callback(
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'''
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function(id, czml, apikey) {
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// Create the Cesium Viewer
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if (!window.viewer) {
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Cesium.Ion.defaultAccessToken = apikey;
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window.viewer = new Cesium.Viewer(id,{
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shouldAnimate: false,
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});
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window.viewer.scene.globe.enableLighting = true;
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}
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// Update the Cesium Viewer
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if (czml) {
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window.viewer.dataSources.removeAll();
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czmlJson = JSON.parse(czml);
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window.viewer.dataSources.add(
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Cesium.CzmlDataSource.load(czmlJson)
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);
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}
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return true;
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}
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''',
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Output('cesiumContainer', 'data-done'),
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Input('cesiumContainer', 'id'),
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Input('czml', 'children'),
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Input('apikey', 'children')
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)
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if __name__ == '__main__':
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app.run_server(debug=False, port=8051, use_reloader=False)
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