Thomas Robitaille wrote:
> Hello,
>
> The following code should produce identical plots, but in the second
> case the alpha value is ignored:
>
> ---
>
> import matplotlib
> matplotlib.use('Agg')
> import matplotlib.pyplot as mpl
> from matplotlib.patches import Ellipse
> from matplotlib.collections import PatchCollection
>
> fig = mpl.figure()
> ax = fig.add_subplot(111)
> ax.add_patch(Ellipse((0.5,0.5),0.7,0.3,angle=30,alpha=0.3))
> fig.savefig('test1.png')
>
> fig = mpl.figure()
> ax = fig.add_subplot(111)
> ax.add_collection(PatchCollection([Ellipse((0.5,0.5),
> 0.7,0.3,angle=30,alpha=0.3)],match_original=True))
> fig.savefig('test2.png
>
> ---
>
> Is this a bug? I'm using the latest svn version of matplotlib.
Yes. Alpha-handling in general is a confusing mess in mpl. Ideally, it
needs an overhaul rather than an isolated bug-fix or two. This might
best be done in the context of a color-handling overhaul, which we have
discussed a little bit.
Eric
>
> Thanks,
>
> Thomas
>
>
>
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Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700
Series Scanner you'll get full speed at 300 dpi even with all image
processing features enabled. http://p.sf.net/sfu/kodak-com
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