Re: [Matplotlib-users] creating a path from multiple sets of xy coordinates (inner and outer outlines)

[Phil E. <pel...@gm...>]

Sorry its taken so long to get an answer, but essentially you want to
concatenate the outer coordinates with the inner ones (reversed) to
indicate that it is a hole. There is a pretty (simple) useful example that
I added a few years ago for demonstrating the use of paths for markers:
http://matplotlib.org/examples/pylab_examples/marker_path.html

Constructing a patch from a path is as simple as (untested):

import matplotlib.patches as mpatches
patch = mpatches.PathPatch(my_path, facecolor='red', edgecolor='yellow')
axes.add_patch(patch)


HTH,

Phil


On 19 December 2014 at 23:01, Denis-Alexander Engemann <
den...@gm...> wrote:

> Dear list,
>
> I would like to create a custom image clipping mask using patches. My
> constraint is that my patch is required to have an outer and multiple inner
> outlines.
> To provide an analogy, think of a mask used for disguise where you leave
> three holes, two for the eyes, one for the mouth.
> I have the xy coordinates for the 'head', and the xy coordinates for each
> of the holes that I don't want to be hidden by the ensuing clipping mask.
>
> What's the matplotlib way to construct my desired path + patch from that?
> Note, it's important in my case to use a patch object. What I need to do
> would not work by simply masking my image using a masked array.
>
> Any pointer would be highly appreciated --
> Denis
>
>
> ------------------------------------------------------------------------------
> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server
> from Actuate! Instantly Supercharge Your Business Reports and Dashboards
> with Interactivity, Sharing, Native Excel Exports, App Integration & more
> Get technology previously reserved for billion-dollar corporations, FREE
>
> http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>