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Fixes to funcanimation #4800

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Merged
merged 4 commits into from
Jul 31, 2015
Merged

Fixes to funcanimation #4800

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6f674d5
Make sure that animations are probably cleared before rerunning by ca…
jenshnielsen Jul 26, 2015
2b77d8e
Make a copy of _save_seq to iterate over
jenshnielsen Jul 27, 2015
aa04769
Add init function to anim decay example
jenshnielsen Jul 27, 2015
b4b0c91
PEP8
jenshnielsen Jul 27, 2015
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13 changes: 10 additions & 3 deletions examples/animation/animate_decay.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,10 +10,17 @@ def data_gen(t=0):
t += 0.1
yield t, np.sin(2*np.pi*t) * np.exp(-t/10.)


def init():
ax.set_ylim(-1.1, 1.1)
ax.set_xlim(0, 10)
del xdata[:]
del ydata[:]
line.set_data(xdata, ydata)
return line,

fig, ax = plt.subplots()
line, = ax.plot([], [], lw=2)
ax.set_ylim(-1.1, 1.1)
ax.set_xlim(0, 5)
ax.grid()
xdata, ydata = [], []

Expand All @@ -33,5 +40,5 @@ def run(data):
return line,

ani = animation.FuncAnimation(fig, run, data_gen, blit=False, interval=10,
repeat=False)
repeat=False, init_func=init)
plt.show()
9 changes: 8 additions & 1 deletion lib/matplotlib/animation.py
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Original file line number Diff line number Diff line change
Expand Up @@ -611,6 +611,7 @@ def _start(self, *args):
# actually start the event_source. We also disconnect _start
# from the draw_events
self.event_source.add_callback(self._step)
self._init_draw()
self.event_source.start()
self._fig.canvas.mpl_disconnect(self._first_draw_id)
self._first_draw_id = None # So we can check on save
Expand Down Expand Up @@ -760,6 +761,9 @@ def save(self, filename, writer=None, fps=None, dpi=None, codec=None,
# since GUI widgets are gone. Either need to remove extra code to
# allow for this non-existant use case or find a way to make it work.
with writer.saving(self._fig, filename, dpi):
for anim in all_anim:
# Clear the initial frame
anim._init_draw()
for data in zip(*[a.new_saved_frame_seq()
for a in all_anim]):
for anim, d in zip(all_anim, data):
Expand Down Expand Up @@ -1080,7 +1084,10 @@ def new_saved_frame_seq(self):
# no saved frames, generate a new frame sequence and take the first
# save_count entries in it.
if self._save_seq:
return iter(self._save_seq)
# While iterating we are going to update _save_seq
# so make a copy to safely iterate over
self._old_saved_seq = self._save_seq.copy()
return iter(self._old_saved_seq)
else:
return itertools.islice(self.new_frame_seq(), self.save_count)

Expand Down