[Paraview] vtkCompositeDataIterator and GoToFirstItem()

[Adriano Gagliardi]

I'm using the vtkCompositeDataIterator to iterate over a multiblock data-set
multiple times. I'd like to reuse the iterator I create in the first
instance by using GoToFirstItem after it has finished the traversal, but I'm
getting a segmentation fault. Is this possible or am I doing this wrong?
Example code below:

      for ( vtkIdType i = 0; i != max; ++i ) {
	  vtkCompositeDataIterator* iter = test->NewIterator();
        iter->GoToFirstItem();
        for ( int j = 0; j != test->GetNumberOfBlocks(); ++j ) {
          //do something here
        }
        iter->GoToNextItem();
      }
      iter->Delete();

It works when the for loops are switched around. I'm just interested to see
what the performance difference is between them:

	vtkCompositeDataIterator* iter = test->NewIterator();
      iter->GoToFirstItem();
	for ( int j = 0; j != test->GetNumberOfBlocks(); ++j ) {
        for ( vtkIdType i = 0; i != max; ++i ) {
          //do something here
        }
        iter->GoToNextItem();
      }
      iter->Delete();

Cheers,

Adriano

===================================

Adriano Gagliardi MEng PhD
Business Sector Leader
Computational Aerodynamics
Aircraft Research Association Ltd.
Manton Lane
Bedford

Tel: 01234 32 4644
E-mail: agagliardi at ara.co.uk
Url: www.ara.co.uk 


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