[vtkusers] vtkCutter + quadratic cells + invalid heap allocation size + VTK 4.5

[John Platt]

Hi all,

 

I am getting a memory exception cutting quadratic hexes after rotating
the plane widget for a few seconds.

 

There is some unusual behaviour in the following code :

 

void vtkQuadraticHexahedron::Subdivide(vtkPointData *inPd, vtkCellData
*inCd, 

                                       vtkIdType cellId)

{

  ...

  //Copy point and cell attribute data

  this->PointData->CopyAllocate(inPd,27);

 

Each time the point data is copied, the number of arrays in the field
increases by 1. So after cutting 32 hexes I get 34 arrays (only 2 of
these are in the input data). This number keeps growing as the plane is
moved.

 

I don't think this is helping. Has anybody any suggestions for a
solution?

 

The particular version of vtkQuadraticHexahedron is 1.21.

 

Apologies in advance if this has already been resolved.

 

Many thanks,

 

John.

 

 

 

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