On Thu, Dec 09, 2010 at 05:09:37PM +0000, Juha Jäykkä wrote:
> Now, I would have thought that
> foo=mlab.get_engine().current_scene.scene
> mlab.get_engine().remove_scene(foo)
> would free the memory used by said scene, but it does not. I assume
> that there is a hidden reference to the data somewhere inside
> mayavi/mlab which is not removed by remove_scene, but it seems hopeless
> to find it.
First of all, it seems to me that the right way to close a scene would be
to use the 'close_scene' method of the engine. You can see this by
looking at the source code of the mlab.close function.
If you still have leaks, I suggest that you have a look at the mlab.clf
function that clears a scene:
def clf(figure=None):
"""Clear the current figure.
You can also supply the figure that you want to clear.
"""
try:
if figure is None:
scene = gcf()
else:
scene = figure
disable_render = scene.scene.disable_render
scene.scene.disable_render = True
scene.children[:] = []
scene._mouse_pick_dispatcher.clear_callbacks()
scene.scene.disable_render = disable_render
except AttributeError:
pass
gc.collect()
You can see that they are a few calls to make sure that nothing is left
behind. It might even be worth calling clf before closing the scene (you
can use the disable_render flag to avoid extra costly rendering).
> How do properly clean up the pipeline and free all the memory involved?
If the above suggestion doesn't fix the problem, I would need a
minimalistic example that reproduces the problem, as chances are that you
are simply leaving some references lying around to your objects.
HTH,
Gaël
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