old_contents: #!/usr/bin/env python
  
  # Copyright (c) 2013 Leif Johnson <leif@leifjohnson.net>
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in all
  # copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  # SOFTWARE.
  
  import lmj.cli
  import lmj.sim
  import numpy as np
  import numpy.random as rng
  
  
  @lmj.cli.annotate(
      asf='load skeleton data from this file',
      frame_rate=('frame rate of the simulation', 'option', None, float),
      friction=('coefficient of friction', 'option', None, float),
      elasticity=('elasticity constant for collisions', 'option', None, float),
      )
  def main(asf, frame_rate=60., friction=5000, elasticity=0.1):
      w = lmj.sim.physics.World(dt=1. / frame_rate, friction=friction, elasticity=elasticity)
      lmj.sim.skeleton.parse(asf).create_bodies(w)
      lmj.sim.viewer.GL(w, paused=True).run()
  
  
  if __name__ == '__main__':
      lmj.cli.call(main)
  
new_contents: #!/usr/bin/env python
  
  # Copyright (c) 2013 Leif Johnson <leif@leifjohnson.net>
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in all
  # copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  # SOFTWARE.
  
  import lmj.cli
  import lmj.sim
  
  
  @lmj.cli.annotate(
      asf='load skeleton data from this file',
      frame_rate=('frame rate of the simulation', 'option', None, float),
      friction=('coefficient of friction', 'option', None, float),
      elasticity=('elasticity constant for collisions', 'option', None, float),
      )
  def main(asf, frame_rate=60., friction=5000, elasticity=0.1):
      w = lmj.sim.physics.World(dt=1. / frame_rate, friction=friction, elasticity=elasticity)
      lmj.sim.skeleton.parse(asf).create_bodies(w)
      lmj.sim.viewer.GL(w, paused=True).run()
  
  
  if __name__ == '__main__':
      lmj.cli.call(main)
  
subject: Remove unused imports.