[vtkusers] update unstructured grid

Tue Oct 3 10:45:03 EDT 2006

Yes John I did it in my Lut. 

vtkLookupTable* pLut =
(vtkLookupTable*)this->Actor->GetMapper()->GetLookupTable();

      pLut->SetTableRange(NewMinValue, NewMaxValue);

      pLut->Modified();

Thanks.

Naim Himrane

Electromagneticworks Inc.

-----Original Message-----
From: John Platt [mailto:jcplatt at dsl.pipex.com] 
Sent: September 29, 2006 7:00 PM
To: 'Naim'
Cc: vtkusers at vtk.org
Subject: RE: [vtkusers] update unstructured grid

I change the scalars in a UGrid all the time so I would be surprised if

you have hit a bug.

Have you updated the scalar range in your LUT or mapper?

John.

-----Original Message-----

From: vtkusers-bounces+jcplatt=dsl.pipex.com at vtk.org

[mailto:vtkusers-bounces+jcplatt=dsl.pipex.com at vtk.org] On Behalf Of

Naim

Sent: 29 September 2006 17:55

To: 'Dominik Szczerba'

Cc: vtkusers at public.kitware.com

Subject: RE: [vtkusers] update unstructured grid

Exactly, the results coloring are random.

I have 5 steps to plot my model. When I plot one by one step creating

again

the unstructured grid, all plots are correct (color), but when I do it

on

the loop by changing just the scalars values and update my unstructured

grid, the coloring results are not the same.

Naim Himrane

Electromagneticworks Inc.

1 Provost street, Suite 305 

Montreal, Quebec H8S 4H2

Canada

Phone: (514) 634-9797

-----Original Message-----

From: Dominik Szczerba [mailto:domi at vision.ee.ethz.ch] 

Sent: September 29, 2006 11:51 AM

To: Naim

Cc: 'Olivier Feys'; vtkusers at public.kitware.com

Subject: Re: [vtkusers] update unstructured grid

what do you mean by not correct results. I once had a similar problem 

which turned out to be merely an error in cell id numbering (my cell 

id's didnt match those of vtk and resulting coloring seemed random)

--DS

Naim wrote:

> Hi Olivier,

> 

> I try it, but the results still the same.

> I try also calling Modified() and/or Update() functions for all

pipeline

> objects, it still not working. May be there is a bug when we update an

> unstructured grid 's scalars inside the pipeline connections (sources,

> filters and mappers).

> 

> Thank you.

> 

> Naim Himrane

> Electromagneticworks Inc.

> 

> -----Original Message-----

> From: Olivier Feys [mailto:olivier.feys at gmail.com] 

> Sent: September 29, 2006 5:01 AM

> To: Naim

> Cc: vtkusers at public.kitware.com

> Subject: Re: [vtkusers] update unstructured grid

> 

> 

> try

> 

> pUnstructuredGrid->Modified()

> 

> Naim wrote:

>> Hi vtkUsers,

>> 

>> I need help how to update an unstructured grid?

>> 

>> I change the scalars and I call "update" and/or "modified" functions,

>> but the results are wrong.

>> 

>> I create pScalars (vtkDoubleArray)

>> 

>> pUnstructuredGrid->GetPointData()->SetScalars(pScalars);

>> 

>> .

>> 

>> I show the plot. The plot is fine.

>> 

>> I change the scalars like this:

>> 

>> for(long i = 0; i < Size; ++i)

>> 

>> {

>> 

>> aNodeValue = pPlotData[i]; // new scalars data

>> 

>> pScalars->SetValue(i, aNodeValue);

>> 

>> }

>> 

>> pScalars->Update(); // or pScalars->Modified();

>> 

>> pUnstructuredGrid->GetPointData()->SetScalars(pScalars);

>> 

>> .

>> 

>> I show the plot but the results are not correct.

>> 

>> Please any idea.

>> 

>> //Naim Himrane//////

>> 

>> //Electromagneticworks Inc.//

>> 

>> 

------------------------------------------------------------------------

>> 

>> _______________________________________________

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> 

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-- 

Dominik Szczerba, Ph.D.

Computer Vision Lab CH-8092 Zurich

http://www.vision.ee.ethz.ch/~domi

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