Re: [Matplotlib-users] zorder taking an array

[Benjamin R. <ben...@ou...>]

I see what you are getting at. The issue is that artists are first sorted
by the zorder and then drawn one at a time. The draw for a collection
artist is an at-once operation, it can't (currently) be split out and
interspersed with the draws from another artist. This is one of the major
limitations for mplot3d, as it would be nice to compose a 3d scene properly
so that everything is logically consistent.

I have actually been working on some changes that would allow one to sort
the draws of individual elements of a collection, but I still haven't
figured out a way to "break out" the elements with other collection
elements in a way that doesn't break the current design or introduce major
performance penalties. Maybe I'll figure something out during SciPy2015.

Cheers!
Ben Root


On Tue, Jun 23, 2015 at 5:44 AM, Simon Walker <s.r...@go...>
wrote:

> When multiple datasets are plotted on the same axis, the points overlay
> each other making it hard to see the points under the most recent ones. One
> way to avoid this is to give each point a random zorder, randomising its
> position in the z axis. This way, points from the first dataset may overly
> points from the last dataset.
>
> This could be achieved nicely if the zorder keyword took an array so the
> random zorder values per point can be pre-computed, but currently it only
> accepts a single number for the whole dataset. Would this be a useful
> feature for others to have? How difficult would it be to implement?
>
> Thanks,
>
> Simon Walker
>
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