[vtkusers] Does anybody know how to use vtkIdType in Python?

[David Gobbi]

Just a quick note:  The InsertNextCell() call should be outside the loop.

    for i in range(0, num):
        ids.SetId(i, i)

    model.InsertNextCell(vtk.VTK_VERTEX, ids)

Otherwise, the IdList isn't completely set when you call
InsertNextCell().  Or if you want just one Id per cell, do this:

    ids.SetNumberOfIds(1)

    for i in range(0, num):
        ids.SetId(0, i)
        model.InsertNextCell(vtk.VTK_VERTEX, ids)

   David


On Mon, Jan 11, 2010 at 7:36 AM, Youbing Zhao <zhaoyoubing at gmail.com> wrote:
> Thank you very much, yes I made a mistake on the argument type.  The problem
> has been solved now :)
>
> The code looks like the following
>
>     num = model.GetNumberOfPoints()
>     ids = vtk.vtkIdList()
>     ids.SetNumberOfIds(num);
>     model.Allocate(1,1)
>
>     for i in range(0, num):
>         ids.SetId(i, i)
>         model.InsertNextCell(vtk.VTK_VERTEX, ids)
>
> On Mon, Jan 11, 2010 at 3:13 PM, David Gobbi <david.gobbi at gmail.com> wrote:
>>
>> Hi Youbing,
>>
>> For the second parameter for InsertNextCell() use a vtkIdList, not a
>> vtkIdType.  But as for for vtkIdType, it's just a typedef as Jerome
>> says.  In Python, you can use a python "int" or "long" for vtkIdType.
>>
>>   David
>>
>> On Mon, Jan 11, 2010 at 7:10 AM, Jérôme <jerome.velut at gmail.com> wrote:
>> > Hi,
>> >
>> > In python, as far as I remember, the type of the data is given by the
>> > first
>> > affectation. And in vtkType.h,
>> > vtkIdType is a simple c++ define of int (basically speaking. It seems to
>> > handle 64/32 integer cases.).
>> > I think you should not have to give such a type to your "id"...
>> >
>> > Can you be more precise about your problem? eg giving code, error
>> > messages,
>> > etc. ?
>> >
>> > Jerome
>> >
>> > 2010/1/11 Youbing Zhao <zhaoyoubing at gmail.com>
>> >>
>> >> Dear Guys,
>> >>
>> >> I'm try to call vtkPolyData.InsertNextCell(1, id) in Python which
>> >> requires
>> >> a vtkIdType variable as the second input.
>> >>
>> >> But I have no idea of setup a vtkIdType variable. I tried
>> >> vtk.vtkIdType,
>> >> but it's not in the module.
>> >>
>> >> Does anybody has the experience?
>> >>
>> >> Thank you very much
>> >>
>> >> Youbing
>> >>
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>
>
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> Youbing Zhao(趙友兵)
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