[vtk-developers] Strange problem with vtkPLYReader

[Prabhu Ramachandran]

Hi Bill,

This is very embarrassing!  Thank you for finding the source of the problem.  I
had assumed that the file was a standard one but apparently a buggy writer had
generated it in the past.

While it would be nice to have readers detect these I understand that this is
going to be hard.  Thanks again and sorry for the noise!

cheers,
Prabhu


On 8/10/17 10:36 PM, Bill Lorensen wrote:
> The PLYReader is fine. The file is not a proper PLY file. The face
> indices should be zero-based, but in this file they are one-based. So,
> the face
> 3 1 2 5
> is referencing an point 5 which exceeds the points array which has
> tuples from 0 - 4 (5 points).
>
> On Thu, Aug 10, 2017 at 6:48 AM, David E DeMarle
> <dave.demarle at kitware.com> wrote:
>> Please submit a bug report via gitlab to help us keep track of this.
>>
>> On Aug 5, 2017 2:04 PM, "Prabhu Ramachandran" <prabhu at aero.iitb.ac.in>
>> wrote:
>>> Hi all,
>>>
>>> We've been running into a strange issue with the vtkPLYReader ever since
>>> VTK 5.6 all the way up to 8.0.0.  I am attaching a simple VTK Python script.
>>> If you run it a few times you'll see inconsistent results for the bounds of
>>> the data like so:
>>>
>>> (0.0, 1.0, 0.0, 1.0, 0.0, 1.600000023841858)
>>> (0.0, 1.5845632502852868e+29, 0.0, 1.0, 0.0, 1.600000023841858)
>>>
>>> ...
>>>
>>>
>>> I've also attached a standard dataset for this.  I could find the bug but
>>> I figured someone more familiar with the code may be quicker fixing it.
>>> Thanks! :)
>>>
>>>
>>> cheers,
>>>
>>> Prabhu
>>>
>>>
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