[vtkusers] vtkStreamTracer not connecting through boundaries

[Berk Geveci]

Awesome! Using the cell locator is slower but it should always work with
this type of mesh.

On Thu, Feb 11, 2010 at 7:20 PM, da <remywendy at gmail.com> wrote:

> Using the nightly works for my case. Thanks Berk!
>
>
>
> On Thu, Feb 11, 2010 at 3:31 PM, da <remywendy at gmail.com> wrote:
>
>> Hey Berk,
>>
>> I am not using the development version. I will try that next (what is the
>> development version? Is this a CMAKE flag when compiling VTK?). I have
>> tested my file with Paraview's streamtracer (using the same integration
>> units, and even smaller integration units), and it does not have this
>> problem regardless of what integration unit I use. Is this because Paraview
>> applies a filter before stream tracer? (I noticed it took a much longer time
>> to do it in Paraview).
>>
>> Here is the latest thing I've tried: I was thinking that it had to do with
>> the tolerance (const double vtkInterpolatedVelocityField::TOLERANCE_SCALE =
>> 1.0E-8; ) when calling FindCell(), so I implemented a subclass of
>> vtkInterpolatedVelocityField that used a tolerance of 1E-03 which didn't
>> change a thing - so it seems to be a problem with vtkPointSet's FindCell
>> method?
>>
>> I'll let you know if the development version improves things.
>>
>> Thanks,
>> Da
>>
>>
>> On Thu, Feb 11, 2010 at 3:01 PM, Berk Geveci <berk.geveci at kitware.com>wrote:
>>
>>> This is a known issue for which we now have a solution (crossing
>>> fingers). Are you using the development version of VTK? If yes, try calling
>>> SetInterpolatorType(vtkStreamTracer::INTERPOLATOR_WITH_CELL_LOCATOR)
>>>
>>> Please let me know whether this works or not.
>>>
>>> Best,
>>> -berk
>>>
>>> On Thu, Feb 11, 2010 at 3:33 PM, da <remywendy at gmail.com> wrote:
>>>
>>>> Hey guys,
>>>>
>>>> I have a single structured grid that is split in the middle (see
>>>> picture). When I try to run a vtkStreamTracer through it, the stream lines
>>>> will be cut off at this boundary if the Integration Unit is set too fine.
>>>> However, if I make the integration unit big enough so that the line goes
>>>> through okay, I lose too much resolution elsewhere. I tried using a
>>>> vtkConnectivityFilter before the stream tracer, but it didn't seem to
>>>> connect the cells on the boundary. Any ideas?
>>>>
>>>> -Da
>>>>
>>>>
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>>
>
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