Re: [Matplotlib-users] path effects question

[Jae-Joon L. <lee...@gm...>]

I think it is me who put that code there. But I cannot recall why I did it.
I may have copied that behavior from other code, but cannot find which.

Yes, I agree that the current behavior is not very desirable.
So, anyone who have an idea how this should behave, please go ahead
and fix this.

Regards,

-JJ


On Sun, Jul 15, 2012 at 1:54 AM, John Hunter <jd...@gm...> wrote:
>
>
> On Sat, Jul 14, 2012 at 11:48 AM, John Hunter <jd...@gm...> wrote:
>>
>> I do not understand why in the following example, if I set
>> patch_alpha=1.0, I do not see the shadow effect.  I would expect to see it
>> for the the rightmost four bars, where the original bars do not entirely
>> occlude the shadow, so even if alpha is 1.0, there are parts of the shadow
>> that are not behind the original bars and should still be visible.
>>
>>
>
>
> I now see that this line explains the behavior
>
> https://github.com/matplotlib/matplotlib/blob/master/lib/matplotlib/patheffects.py#L183
>
>  gc0.set_alpha(1.-self._patch_alpha)
>
> so maybe I should amend my question: is this desirable that the shadow alpha
> is 1-patch_alpha, since an alpha of 1 on the patch does not imply that there
> is no visible shadow?
>
>