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help with pan, rotate3d, and zoom functions

From: John W. Eaton
Subject: help with pan, rotate3d, and zoom functions
Date: Fri, 12 Sep 2014 15:32:40 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Icedove/24.5.0

I'm working on adding the zoom function to Octave. I see we already have the pan and rotate3d functions. I'd like to make all three of these as compatible with Matlab as possible.

Currently, Octave's rotate3d and pan functions add a property to axes objects but in Matlab, pan and zoom work on figures instead of axes and rotate3d can apply to either figures or axes. Matlab also appears to attach a handle class object to the figure properties, though it doesn't seem to appear in the property list of a figure handle so I assume it is hidden or private in some way.

Assuming Octave's classdef support is sufficient, is there any objection to changing Octave's implementation to use a handle class object instead of the current simple string property?

Is there an objection to making the pan function operate on figures instead of axes? I think that's required for compatibility.

How is rotate3d supposed to work on either axes or figures? Is the rotate3d object for an axis object actually just another reference to the rotate3d object of the parent figure? It seems like that would be simple to do by storing the handle class object in the figure object that contains the axes object. Is there any reason that zoom and pan should not allow axes arguments as well?


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