def make_movie(c0, c1, theta0, movie_name,
m=2, dims=(-1.5, 1.5, -1.5, 1.5), numframes=100):
"""
Create linear interpolation movie.
"""
xmin, xmax, ymin, ymax = dims
mp = MatchingProblem(c0, c1, m)
g, res, n = mp.match(theta0)
interp = LiegroupInterpolationMethod(c0, c1, g)
# Generate frames
for n in xrange(0, numframes):
epsilon = float(n)/(numframes-1)
c0_transformed = interp.transform(epsilon)
im = LineImage(xmin=xmin, xmax=xmax, ymin=ymin, ymax=ymax);
im.plot_curve(c0_transformed)
im.save(TMP_FOLDER + 'still%04d.png' % n)
im.close()
# Compile movie
cwd = os.getcwd()
os.chdir(TMP_FOLDER)
os.system('/Users/Joris/localsoft/bin/ffmpeg -i still%%04d.png %s' % movie_name)
shutil.move(movie_name, cwd)
os.chdir(cwd)
