[vtkusers] help displaying a set of points

[Amy Squillacote]

Hi Gala,

Does your vtkUnstructuredGrid dataset have vertex cells in it, or only 
points? In order for VTK to display points, you have to create a vertex 
cell for each point. You can either do that when you create the 
unstructured grid, or you can use vtkGlyph3D filter 
(http://www.vtk.org/doc/nightly/html/classvtkGlyph3D.html) to do it.

- Amy

wind wrote:
> I did that and still nothing. 
>
> On Feb 21, 2007, at 8:34 PM, Michael Rice wrote:
>
>> You probably need to set the Actor properties to display as points:
>>
>> actor->GetPropery()->SetRepresentationToPoints()
>>
>> If you've assigned scalars, then you need to turn those on too:
>>
>> mapper->ScalarVisibilityOn()
>>
>> Michael
>>
>> On Feb 21, 2007, at 2:17 PM, wind wrote:
>>
>>> Hello,
>>>
>>> I have a dataset that consists of XYZ point coordinates and one 
>>> scalar at each point. I want to display the points as individual 
>>> points, not a surface, not a wireframe, nothing. The points are not 
>>> related to each other, so I don't want to do anything to connect 
>>> them explicitly. I've tried just about every combination of 
>>> vtkUnstructuredGrid, vtkDataSetMapper and what not and I still end 
>>> up with a blank screen. I know the data is there and read in 
>>> correctly. I have the vtkPoints object and the vtkFloatArray for 
>>> scalars.
>>>
>>> Thanks,
>>>
>>> -- Gala
>>>
>>> Gala Wind
>>> (301) 614-6221
>>> wind at climate.gsfc.nasa.gov <mailto:wind at climate.gsfc.nasa.gov>
>>> Code 613.2, Climate and Radiation
>>> SSAI, Inc.
>>> NASA/GSFC
>>> Greenbelt, MD 20771
>>>
>>> /*--------------------------------------------------------------------
>>>   -- There's always a way, you just have to find it.
>>>             ( B. Hambly "Children of the Jedi" )
>>> ----------------------------------------------------------------------*/
>>>
>>>
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>>
>>
>
> Gala Wind
>
> (301) 614-6221
>
> wind at climate.gsfc.nasa.gov <mailto:wind at climate.gsfc.nasa.gov>
>
> Code 613.2, Climate and Radiation
>
> SSAI, Inc.
>
> NASA/GSFC
>
> Greenbelt, MD 20771
>
>
> /*--------------------------------------------------------------------
>
>   -- There's always a way, you just have to find it.
>
>             ( B. Hambly "Children of the Jedi" )
>
> ----------------------------------------------------------------------*/
>
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> This is the private VTK discussion list. 
> Please keep messages on-topic. Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>   

-- 
Amy Squillacote
Kitware, Inc.
28 Corporate Drive
Clifton Park, NY 12065
Phone: (518) 371-3971 x106