def _writeEmptyAssignments(fullDir):
    """
	This script generates "empty" routes.czml and displayPaths.js files

	Parameters
	----------
	fullDir: string
		The directory of cesium, including the name of the instance.
	"""
    czmlFilePath = '%s/routes.czml' % fullDir
    f = open(czmlFilePath, 'w')
    czmlStr = '[ \n'
    czmlStr += '{ \n'
    czmlStr += '    "id": "document", \n'
    czmlStr += '    "version": "1.0" \n'
    czmlStr += '}\n'
    czmlStr += ']'
    f.write(czmlStr)
    f.close()
    jsFilePath = '%s/displayPaths.js' % fullDir
    f = open(jsFilePath, 'w')
    jsStr = (
        '// This .js file is auto-generated by `createCesium` from VeRoViz\n')
    jsStr += '// Display paths for cesium application\n\n'
    jsStr += 'function displayPaths() {\n'
    jsStr += '    // pass \n'
    jsStr += '}'
    f.write(jsStr)
    f.close()
