[vtkusers] help displaying a set of points

[wind]

I figured it out, whatever it was. This code did it, even though I  
swear I tried this before

	vtkPolyData* pd1 = vtkPolyData::New();
	pd1->SetPoints(flight_track);
	pd1->GetPointData()->SetScalars(scalars);
	pd1->Update();


	vtkMaskPoints* mp = vtkMaskPoints::New();
	mp->SetInput(pd1);
	mp->GenerateVerticesOn();


   vtkPolyDataMapper *popMapper = vtkPolyDataMapper::New();
	popMapper->SetInput(mp->GetOutput());
     popMapper->ScalarVisibilityOn();
	popMapper->SetScalarRange(21.59, 3369.36);
	popMapper->Update();
	
   vtkActor *popActor = vtkActor::New();
     popActor->SetMapper(popMapper);
	popActor->GetProperty()->SetRepresentationToPoints();
	popActor->GetProperty()->SetPointSize(1.0);

This is the result of this little madness


> 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" )
>>>> ------------------------------------------------------------------- 
>>>> ---*/
>>>>
>>>>
>>>> _______________________________________________
>>>> This is the private VTK discussion list.
>>>> Please keep messages on-topic. Check the FAQ at: http:// 
>>>> www.vtk.org/Wiki/VTK_FAQ
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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
>
>

Gala Wind
(301) 614-6221
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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