Re: [matplotlib-devel] Should Path objects have an initial MOVETO?

The bug was actually in the path simplification.  In really degenerate 
cases (bravo for finding it) of paths that are completely outside of the 
clip region, it would create a path with a single LINETO command.

This is now fixed in SVN on the branch and trunk.

Mike

Michael Droettboom wrote:
> Jouni K. Seppänen wrote:
>   
>> Jeff Whitaker <js...@fa...> writes:
>>
>>   
>>     
>>> Jouni:  That test script now crashes with:
>>>
>>>   File "/Users/jwhitaker/lib/python/matplotlib/backends/backend_pdf.py", 
>>> line 1214, in pathOperations
>>>     raise ValueError, 'Path lacks initial MOVETO'
>>> ValueError: Path lacks initial MOVETO
>>>     
>>>       
>> I think this confirms my suspicion that the bug is really elsewhere. A
>> path in PDF needs to begin with a "m" that sets the initial point, and
>> that particular Path object only consisted of one LINETO operation. Am I
>> correct in thinking that this is an invalid path?
>>   
>>     
> Yes -- that path should be considered invalid, though the Path class 
> doesn't do any verification.  I'll add this.  I'm surprised that it's 
> coming from the line class, which in general doesn't allow for 
> customization of the path codes.  There must be something unanticipated 
> happening.
>
> Cheers,
> Mike
>
>   

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