[vtkusers] Request help on Python VTK setCells error

[Aso agile]

Thanks Gil for reminding me of my silly mistake! SetCells is correct not
setCells (capital S..).

Now my code works fine with 'cells2' which is created as follow:
        cell_ids = np.arange(0,8*Nx*Ny*Nz,
dtype=np.int64).reshape(Nx*Ny*Nz, 8)
        cells2 = vtk.vtkCellArray()
        for cell in cell_ids:
            pids = vtk.vtkIdList()
            for p in cell:
                pids.InsertNextId(p)
            cells2.InsertNextCell(pids)
        grid.SetCells(vtk.VTK_HEXAHEDRON, cells2)

but it doesn't work with  'cells' as in follow:
        cell_ids = np.arange(0,8*Nx*Ny*Nz,
dtype=np.int64).reshape(Nx*Ny*Nz, 8)
        cells = VN.numpy_to_vtkIdTypeArray(cell_ids, deep=True)
        grid.SetCells(vtk.VTK_HEXAHEDRON, cells)
#Returns error:
TypeError: function takes exactly 3 arguments (2 given).

Any help is appreciated.

Thanks,


Asaad


On Wed, Apr 10, 2013 at 2:23 PM, Aso agile <aso.agile at gmail.com> wrote:

> Hi ,
>
> I am having problem with VTK's setCell for creating unstructured grid from
> a numpy array. I used following two methods to create cells:
>         - using numpy_to_vtkIdTypeArray, which result in cell
>         - using vtkCellArray and filling it with individual cell's poit
> list. Results stored in cells2 in the code
> But both method return following error:
>
>         # Create points
>         grid_array = ...
>         grid_array = grid_array.reshape(8*Nz*Ny*Nx,3)
>         vtk_points = vtk.vtkPoints()
>         grid = vtk.vtkUnstructuredGrid()
>         points = VN.numpy_to_vtk(grid_array, deep=True)
>         vtk_points.SetData(points)
>         grid.SetPoints(vtk_points)
>
>
>         # Create cells
>         cell_ids = np.arange(0,8*Nx*Ny*Nz,
> dtype=np.int64).reshape(Nx*Ny*Nz, 8)
>         cells = VN.numpy_to_vtkIdTypeArray(cell_ids, deep=True)
>         cells2 = vtk.vtkCellArray()
>         for cell in cell_ids:
>             pids = vtk.vtkIdList()
>             for p in cell:
>                 pids.InsertNextId(p)
>             cells2.InsertNextCell(pids)
>         print cells
>         print cells2
>         # Assign cells to grid and create unstructured grid. Error comes
> after this:
>         grid.setCells(vtk.VTK_HEXAHEDRON, cells2)    #
> 12==vtk.VTK_HEXAHEDRON
>
> AttributeError: setCells
>
>
> I really appriciate your help. I spent 2 days on this problem googled it
> but couldn't find anything useful.
>
> Regards,
>
> Aso
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20130412/d8e364bc/attachment.htm>