text: #! /usr/bin/env python
  
  """
  File: sombrero_gif_maker.py
  Copyright (c) 2016 Michael Seaman
  License: MIT
  
  Description: Draws upon the sombrero class to create an animated gif
  via commandline
  1st argument is the number of steps
  
  """
  from sombrero import Sombrero
  import sys
  import subprocess
  import numpy as np
  
  num_frames = 100
  step_size = 2 * np.pi
  precision = 1000
  h = step_size / precision
  a = 0
  b = step_size * 1000
  n = int((b-a)/h)
  
  
  s = Sombrero(.4, 0, 0)
  
  print "Calculating points"
  s.calc_n_rk4_steps(n, h)
  print "Function approximated."
  
  for theta in np.linspace(0, .99, num_frames):
      s.generate_poincare_graph(precision, theta = theta, xLim = (-1.5, 1.5), yLim = (-1.1, 1.1))
  print "Frames Generated."
      
  subprocess.call("convert -delay 5 -loop 0 *.png Sombrero.gif", shell=True)
  subprocess.call("rm *.png", shell=True)
  print "Process complete!"
  