[Paraview] bug in vtkLookupTable?

[Rafael Küng]

Thanks for your reply!

Sadly, this doesnt help.

Here's a screenshot, i marked the points, so you can see that it's the 
line between points with SnapId 0 and 1 witch is colored, not the actual 
points themselves.. No matter how big i set the table range, only the 
first linesegment gets colored..
(Each line connects the same point in different snapshots, so snapid is 
increasing here from left to right along one line..)

http://www.physik.uzh.ch/~rafik/pv%20coloring.png

here the orginal code, wich generated this pic, or at least part of..:
(i can paste everything if needed..)

....

	vtkSmartPointer<vtkLookupTable> lut2 = 
vtkSmartPointer<vtkLookupTable>::New();
	lut2->SetTableRange(0,3);
	lut2->SetNumberOfTableValues(4);
	lut2->SetTableValue(0,1,0,0);
	lut2->SetTableValue(1,1,1,0);
	lut2->SetTableValue(2,1,1,1);
	lut2->SetTableValue(3,0,0,1);
	lut2->Build();

	actData->SnapId->SetLookupTable(lut2);

	//lut2->PrintSelf(cerr, vtkIndent(0)) ;

	out->SetPoints(actData->Position);
	out->SetVerts(actData->Cells);
	out->SetLines(actData->Tracks);
	out->GetPointData()->AddArray(actData->Velocity);
	out->GetPointData()->AddArray(actData->GId);
	out->GetPointData()->AddArray(actData->SnapId);
	out->GetPointData()->AddArray(actData->Mvir);
	out->GetPointData()->AddArray(actData->Rvir);
	out->GetPointData()->AddArray(actData->Vmax);
	out->GetPointData()->AddArray(actData->Rmax);
	out->GetPointData()->AddArray(actData->Redshift);
	out->GetPointData()->AddArray(actData->TrackId);

Many thanks
Rafael Kueng


Am 08.12.2010 22:48, schrieb John Drescher:
> On Wed, Dec 8, 2010 at 4:27 PM, Rafael Küng<rafi.kueng at gmx.ch>  wrote:
>> Hi There
>>
>> I'm trying to get colored points and tracks with a reader, but i only get
>> the first point colored.. can somebody please give me a hint? It looks to me
>> that the SetTableRange(d,d) is not doing what it's supposed to do... (pv
>> 3.8.0)
>>
>> In position (vtkPoints) i've got 10 points, connected with lines. I would
>> like to color each point according to it's snapid (vtkIdTypeArray).
>> So, it does some coloring, but only on the line between the 1st point
>> (SnapId=0) and the second point (SnapId 1)..
>>
>> Many thanks
>> Rafael Kueng
>> University of Zuerich
>>
>>
>> My code:
>>
>> -----
>> vtkPolyData * out = vtkPolyData::GetData(outputVector);
>>
>> //...generate points...
>>
>> vtkSmartPointer<vtkLookupTable>  lut =
>> vtkSmartPointer<vtkLookupTable>::New();
>> lut->Build();
>> lut->SetTableRange(0,9);
>> lut->SetNumberOfTableValues(10);
>> lut->SetTableValue(0,1,0,0);
>> lut->SetTableValue(1,1,1,0);
>> lut->SetTableValue(2,1,1,1);
>> lut->SetTableValue(3,0,1,1);
>> //...
>>
>
> Put the following line here instead of at the top.
>
> lut->Build();
>
>> SnapId->SetLookupTable(lut2);
>>
>> out->SetPoints(Position);
>> out->SetVerts(Cells);
>> out->SetLines(Tracks);
>> out->GetPointData()->AddArray(SnapId);
>>
>> -----
>>
>> i also tried lut->build after setting the table values, doesn't make any
>> difference..
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