Support derived Animate classes in order to use the same axes.

[tahsinkose]

Hello there,

I've been using the MATLAB version of these nice toolboxes and just recently finally had a use-case to migrate to Python. I needed to visualize multiple frames in a single animation view. In order to do that, I have to derive from base.animate.Animate and adjust some of the internal data structures. In order to use the same ax as base.animate.Animate does, however, I had to clone this repo and make this change so that all derived classes receive the exact same treatment with the base class.

[tahsinkose]

@jhavl this is a rather simple yet capable improvement that provides trivial extensibility of Animate classes. Could you please give it a quick look and merge? 🙏🏼

Cc. @petercorke

[petercorke]

Looks great! I'll have a look at the change on the weekend. There's more I'd like to do with animations but this seems like a win. Thx for your interest

[tahsinkose]

@petercorke friendly ping 🙂

[tahsinkose]

Another friendly ping for @jhavl and @myeatman-bdai. This is rather a simple improvement, thus should not take too much of your time. PTAL 🙏🏼

[tahsinkose]

@baxelrod-bdai could you check please? It is a pretty small PR

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
spatialmath/base/graphics.py	80.00%	1 Missing ⚠️

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[petercorke]

Really useful small clean fix, embarrassingly long time in approving it.

[petercorke]

@jbarry-bdai rebased and tested, it passes.