[vtkusers] Problem with vtkPolyDataToImageStencil in 5.8

[Jothybasu Selvaraj]

Another point here,

I am creating a vtkPolyData for each contour and then adding it to the
vtkAppendPolydataFilter, then the output of vtkAppenPolydataFilter is set
as input to vtkPolydataToImageStencil.

Could this make any difference?

Thanks

Jothy

On Mon, Mar 5, 2012 at 7:49 PM, Jothybasu Selvaraj <jothybasu at gmail.com>wrote:

> No, it doesn't fix the problem.
>
> But it seems to work fine for contours with z-spacing in steps of 1mm.
>
> It is working well for a dataset with 3mm spacing but fails for 2.5 mm.
>
> Maybe I need to test it thoroughly. Can I use those cxx and .h from 5.6 in
> 5.8, that would be a easy workaround.
>
> Thanks
>
> Jothy
>
>
> On Mon, Mar 5, 2012 at 4:01 PM, David Gobbi <david.gobbi at gmail.com> wrote:
>
>> Hi Jothy,
>>
>> It underwent significant changes, but the only change I can think
>> of that might have affected your pipeline is the way that it does
>> rounding, it used to use a Floor() method that provided a small
>> tolerance even if you did SetTolerance(0).  Try calling
>> SetTolerance(1e-6) on your PolyDataToImageStencil object, it
>> might help.
>>
>>  - David
>>
>> On Mon, Mar 5, 2012 at 3:17 AM, Jothybasu Selvaraj <jothybasu at gmail.com>
>> wrote:
>> > Hi all,
>> >
>> > I was able to create a mesh using the following pipeline in 5.6 and it
>> > worked well
>> >
>> >
>> vtkPolyDataToImageStencil->vtkLinearExtrusionFilter->vtkImageStencil->vtkDiscreteMarchingCubes
>> >
>> > Now, I have updated vtk to 5.8 and I am getting gaps in the mesh along
>> the z
>> > axis. I am really puzzled, I have tried with different data sets as
>> well.
>> >
>> > I have read somewhere that vtkPolyDataToImageStencil had some changes in
>> > 5.8, does it has anything to do with this problem, or am I doing
>> > anything wrong?
>> >
>> > I have contours of constant z-spacing.
>> >
>> > Any hints?
>> >
>> > Thanks
>> >
>> > --
>> > Jothy
>>
>
>
>
> --
> Jothy
>
>


-- 
Jothy
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