[vtkusers] vtkQuadHex test fails

[Budd Hirons]

Thanks John,

I brought my vtk4.4 version of vtkQuadraticHexahedron.cxx up to 1.23 
(just before the class was moved to Filtering) and everything works 
beautifully.

Budd.


John Platt wrote:
> Hi Budd,
> 
> You need at least version 1.23 of vtkQuadraticHexahedron.cxx
> 
> John.
> 
> -----Original Message-----
> From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] On
> Behalf Of Budd Hirons
> Sent: 20 April 2005 16:11
> To: vtk-users
> Subject: [vtkusers] vtkQuadHex test fails
> 
> Hello,
> 
> We are trying to exercise EvaluatePosition in vtkQuadraticHexahedron, 
> and we find that the test included in the code only works of the point 
> you are evaluating is at the parametric center of the cell points.
> 
> Is there a fix for this or is there something done wrong?  The code 
> below is directly out of /Common/Testing/Cxx/quadraticEvaluation.cxx
> 
> rval is always -1 unless you set the point you are evaluating to 
> .5,.5,.5 ...
> 
> Cheers,
> Budd.
> 
> 
> <code>
> 
>    vtkQuadraticHexahedron *hex = vtkQuadraticHexahedron::New();
> 
>    // vtkQuadraticHexahedron
>    double hexPCoords[3], hexWeights[20], hexPosition[3];
>    //double hexPoint[1][3] = {{0.25, 0.33333, 0.666667}};
> 	double hexPoint[1][3] = {{0.5, 0.51, 0.5}};
> 
>    double hexClosest[3];
> 
>    hex->GetPointIds()->SetId(0,0);
>    hex->GetPointIds()->SetId(1,1);
>    hex->GetPointIds()->SetId(2,2);
>    hex->GetPointIds()->SetId(3,3);
>    hex->GetPointIds()->SetId(4,4);
>    hex->GetPointIds()->SetId(5,5);
>    hex->GetPointIds()->SetId(6,6);
>    hex->GetPointIds()->SetId(7,7);
>    hex->GetPointIds()->SetId(8,8);
>    hex->GetPointIds()->SetId(9,9);
>    hex->GetPointIds()->SetId(10,10);
>    hex->GetPointIds()->SetId(11,11);
>    hex->GetPointIds()->SetId(12,12);
>    hex->GetPointIds()->SetId(13,13);
>    hex->GetPointIds()->SetId(14,14);
>    hex->GetPointIds()->SetId(15,15);
>    hex->GetPointIds()->SetId(16,16);
>    hex->GetPointIds()->SetId(17,17);
>    hex->GetPointIds()->SetId(18,18);
>    hex->GetPointIds()->SetId(19,19);
> 
>    hex->GetPoints()->SetPoint( 0, 0, 0, 0  );
>    hex->GetPoints()->SetPoint( 1, 1, 0, 0  );
>    hex->GetPoints()->SetPoint( 2, 1, 1, 0  );
>    hex->GetPoints()->SetPoint( 3, 0, 1, 0  );
>    hex->GetPoints()->SetPoint( 4, 0, 0, 1  );
>    hex->GetPoints()->SetPoint( 5, 1, 0, 1  );
>    hex->GetPoints()->SetPoint( 6, 1, 1, 1  );
>    hex->GetPoints()->SetPoint( 7, 0, 1, 1  );
>    hex->GetPoints()->SetPoint( 8, 0.5, 0, 0);
>    hex->GetPoints()->SetPoint( 9, 1, 0.5, 0);
>    hex->GetPoints()->SetPoint(10, 0.5, 1, 0);
>    hex->GetPoints()->SetPoint(11, 0, 0.5, 0);
>    hex->GetPoints()->SetPoint(12, 0.5, 0, 1);
>    hex->GetPoints()->SetPoint(13, 1, 0.5, 1);
>    hex->GetPoints()->SetPoint(14, 0.5, 1, 1);
>    hex->GetPoints()->SetPoint(15, 0, 0.5, 1);
>    hex->GetPoints()->SetPoint(16, 0, 0, 0.5);
>    hex->GetPoints()->SetPoint(17, 1, 0, 0.5);
>    hex->GetPoints()->SetPoint(18, 1, 1, 0.5);
>    hex->GetPoints()->SetPoint(19, 0, 1, 0.5);
> 
>    int subId = 0;
>    double dist2 = 0.0;
>    int rval = hex->EvaluatePosition(hexPoint[0], hexClosest, subId, 
> hexPCoords, dist2, hexWeights);
> 
>    cout << rval << endl;
> 
> </code>
> 
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