Ok.  I'll apply this fix to SVN.  I'll have to go back and find a better 
way to do this later.  Personally, I think the markers at normal to 
largish size (5+ pixels in diameter) look too fuzzy without the pixel 
quantizing.

Mike

Andrew Straw wrote:
> Hi Mike,
>
> That does fix the issue. Another thing I noticed that is fixed with your
> patch: the '.' marks appear like '+' when drawn at a smallish size.
>
> Thanks,
> Andrew
>
> Michael Droettboom wrote:
>   
>> This might be related to a change I made in the Agg backend to make the
>> markers look better by rounding their coordinates to the nearest pixel. 
>> It certainly made the stock markers at a standard size look better, but
>> I suspect as they get smaller, they are converging down to the same
>> value, thus having a truly zero-sized marker.
>>
>> I'm away from a machine with build tools at the moment, so can't
>> confirm.  Does the attached patch work for you?
>>
>> Mike
>>
>> Andrew Straw wrote:
>>     
>>> John Hunter wrote:
>>>  
>>>       
>>>> On Sat, Nov 29, 2008 at 3:55 PM, Andrew Straw <[EMAIL PROTECTED]>
>>>> wrote:
>>>>    
>>>>         
>>>>> Hi All,
>>>>>
>>>>> I have been testing the latest svn matplotlib, which failed to produce
>>>>> any visible data in some long-standing scripts of mine. :(
>>>>>
>>>>> Investigating further, my use of markersize=0.5 combined with the '.'
>>>>> symbol and the Agg backend caused a complete disappearance of the
>>>>> markers. I'm attaching example images from 0.93.3 and the most recent
>>>>> SVN using the attached script.
>>>>>
>>>>> I'd be happy to track this down, but I think this might be a no-brainer
>>>>> for someone on the list.
>>>>>       
>>>>>           
>>>> Is this agg only?
>>>>     
>>>>         
>>> It doesn't happen with PS or SVG, so I'll say yes.
>>>
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>   

-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA


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