[Paraview] vtkDataSet algorithm that takes composite data set as input

[David E DeMarle]

I'ld sit down with a debugger and see which request exactly is failing and
why.

Try overriding vtkAlgorithm::ProcessRequest() in your filter so that you
can easily get a breakpoint in an instance of your class.

In that method call PrintSelf(cerr, vtkIndent(0)) on the "request"
vtkInformation. Put the breakpoint right after that.
After the breakpoint call this->Superclass::ProcessRequest().

When the PrintSelf tells you which request fails, rerun and step in until
you see why the handling method returns.

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Fri, Jan 20, 2012 at 3:34 PM, Sohail Shafii <sohailshafii at yahoo.com>wrote:

> Thanks. I get these sorts of errors:
> vtkPVCompositeDataPipeline (0x2a831a0): Algorithm
> vtkFastMarcher(0x2a80860) returned failure for request: vtkInformation
> (0x339b0f0
> Before RequestData is reached...
>
> Sohail
>   ------------------------------
> *From:* David E DeMarle <dave.demarle at kitware.com>
> *To:* Sohail Shafii <sohailshafii at yahoo.com>
> *Cc:* "paraview at paraview.org" <paraview at paraview.org>
> *Sent:* Friday, January 20, 2012 11:42 AM
> *Subject:* Re: [Paraview] vtkDataSet algorithm that takes composite data
> set as input
>
> Try something like this.
> In this case the mapper takes in either type, which you may or may not
> want.
>
>
> //----------------------------------------------------------------------------
>  int vtkCompositePolyDataMapper2::FillInputPortInformation(
>   int vtkNotUsed(port), vtkInformation* info)
> {
>   info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkPolyData");
>   info->Append(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(),
> "vtkCompositeDataSet");
>   return 1;
> }
>
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
>
>
> On Fri, Jan 20, 2012 at 2:36 PM, Sohail Shafii <sohailshafii at yahoo.com>wrote:
>
> Hi,
>
> I am developing an algorithm that requires a composite data set as input
> while creating a vtkDataSet as output -- basically it inherit from
> vtkDataSetAlgorithm. I know that one must provide a new definition to the
> FillInputPortInformation(int port, vtkInformation *info) function, but I'm
> not sure how. Please advise, thank you.
>
> Sohail
>
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