On Fri, Apr 23, 2010 at 11:07 AM, Thomas Robitaille
<thomas.robitai...@gmail.com> wrote:
> Hi,
>
> I'm having issues with translucent patches. The following code
>
> import matplotlib
> matplotlib.use('Agg')
> import matplotlib.pyplot as mpl
> from matplotlib.patches import Circle
>
> fig = mpl.figure()
> ax = fig.add_subplot(111)
> c = Circle((0.25,0.5), radius=0.2, facecolor='none', edgecolor='green',
> alpha=0.2)
> ax.add_patch(c)
> c = Circle((0.75,0.5), radius=0.2, facecolor='blue', edgecolor='green',
> alpha=0.2)
> ax.add_patch(c)
> fig.savefig('test_alpha.png')
>
> Produces a plot where the two circles have different borders - the left
> circle has a border with alpha=1.0 and the right circle has a border with
> alpha=0.2. Should I submit this as a bug report?
>
This is kind of a known bug.
http://old.nabble.com/patches-have-incorrect-alpha-values-td22667217.html#a22667217
But, please go ahead and file a bug report.
Fixing this requires some changes in backend api, and I'm not sure if
this will be fixed soon.
Regards,
-JJ
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