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How can you twll within Matlab code when a render is done?

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This comes up when manually manipulating large surfaces drawn via trisurf.
It can take several seconds/minutes to redraw the figure after zooming (via the mag pointer) of moving the target point (via the hand pointer).
Rather than sitting there waiting, and having to remember the previous state to be sure it has changed, it would be helpful to have a way to know when the last render has completed.
Any hints?

Accepted Answer

Jan on 21 Dec 2014
What do you mean by "know"?
You could add a beep command as the 'ActionPostCallback' of the zoom and pan object, see doc zoom and doc pan.

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