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JSBSim_nb_utils.py
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JSBSim_nb_utils.py
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# JSBSim_nb_utils.py
#
# Some utilities to help developing Jupyter notebooks (Python 3 kernel) to test JSBSim.
#
# Copyright (c) 2018 JSBSim-Team
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, see <http://www.gnu.org/licenses/>
import os, sys, tempfile, shutil, unittest
import xml.etree.ElementTree as et
import numpy as np
import pandas as pd
import jsbsim
class SandBox:
def __init__(self, *args):
self._tmpdir = tempfile.mkdtemp(dir=os.getcwd())
path_to_jsbsim = os.path.join(sys.argv[1], *args)
self._relpath_to_jsbsim = os.path.relpath(path_to_jsbsim, self._tmpdir)
def __call__(self, *args):
return os.path.relpath(os.path.join(self._tmpdir, *args), os.getcwd())
def delete_csv_files(self):
files = os.listdir(self._tmpdir)
for f in files:
if f[-4:] == '.csv':
os.remove(os.path.join(self._tmpdir, f))
def path_to_jsbsim_file(self, *args):
return os.path.join(self._relpath_to_jsbsim, *args)
def exists(self, filename):
return os.path.exists(self(filename))
def erase(self):
shutil.rmtree(self._tmpdir)
def CreateFDM(sandbox):
_fdm = jsbsim.FGFDMExec(root_dir=os.path.join(sandbox(), ''))
path = sandbox.path_to_jsbsim_file()
_fdm.set_aircraft_path(os.path.join(path, 'aircraft'))
_fdm.set_engine_path(os.path.join(path, 'engine'))
_fdm.set_systems_path(os.path.join(path, 'systems'))
return _fdm
def ExecuteUntil(_fdm, end_time):
while _fdm.run():
if _fdm.get_sim_time() > end_time:
return
def append_xml(name):
if len(name) < 4 or name[-4:] != '.xml':
return name+'.xml'
return name
def CheckXMLFile(f, header):
# Is f a file ?
if not os.path.isfile(f):
return False
# Is f an XML file ?
try:
tree = et.parse(f)
except et.ParseError:
return False
# Check the file header
return tree.getroot().tag.upper() == header.upper()
def CopyAircraftDef(script_path, sandbox):
# Get the aircraft name
tree = et.parse(script_path)
use_element = tree.getroot().find('use')
aircraft_name = use_element.attrib['aircraft']
# Then, create a directory aircraft/aircraft_name in the build directory
aircraft_path = os.path.join('aircraft', aircraft_name)
path_to_jsbsim_aircrafts = sandbox.path_to_jsbsim_file(aircraft_path)
aircraft_path = sandbox(aircraft_path)
if not os.path.exists(aircraft_path):
os.makedirs(aircraft_path)
# Make a copy of the initialization file in
# build/.../aircraft/aircraft_name
IC_file = append_xml(use_element.attrib['initialize'])
shutil.copy(os.path.join(path_to_jsbsim_aircrafts, IC_file), aircraft_path)
tree = et.parse(os.path.join(path_to_jsbsim_aircrafts,
aircraft_name+'.xml'))
# The aircraft definition file may also load some data from external files.
# If so, we need to copy these files in our directory
# build/.../aircraft/aircraft_name Only the external files that are in the
# original directory aircraft/aircraft_name will be copied. The files
# located in 'engine' and 'systems' do not need to be copied.
for element in list(tree.getroot()):
if 'file' in element.keys():
name = append_xml(element.attrib['file'])
name_with_path = os.path.join(path_to_jsbsim_aircrafts, name)
subdirs = os.path.split(name)[0]
if os.path.exists(name_with_path):
shutil.copy(name_with_path, os.path.join(aircraft_path,
subdirs))
else:
name_with_system_path = os.path.join(path_to_jsbsim_aircrafts,
'Systems', name)
print(name_with_system_path)
if os.path.exists(name_with_system_path):
system_path = sandbox(aircraft_path, 'Systems')
if not os.path.exists(system_path):
os.makedirs(system_path)
shutil.copy(name_with_system_path,
os.path.join(system_path, subdirs))
return tree, aircraft_name, path_to_jsbsim_aircrafts