VTK/VTK 6 Migration/Removal of SetWholeExtent

Removal of SetWholeExtent() from vtkDataObject

VTK 6 introduces a number of backwards-incompatible changes. The reasons behind these changes are described in more detail VTK/VTK_6_Migration/Overview. One of these changes is the removal of all pipeline related methods from vtkDataObject. Among these methods is SetWholeExtent(). SetWholeExtent() was previously (correctly) used to set meta-data about the whole available extent of a structured dataset in RequestInformation() and (incorrectly) used to try to set the actual extent of a structured dataset. The first use case can be replaced with the setting of the WHOLE_EXTENT() in the output information and the second one can be safely removed.

Example 1

Replace

<source lang="cpp"> int vtkMyReader::RequestInformation(vtkInformation*, vtkInformationVector**,

      vtkInformationVector* outInfoVec)

{

  vtkImageData* image = this->GetOutput();
  int wext[6] = {0, 10, 0, 10, 0, 10};
  image->SetWholeExtent(wext);
  return 1;

} </source>

with

<source lang="cpp"> int vtkMyReader::RequestInformation(vtkInformation*, vtkInformationVector**,

      vtkInformationVector* outInfoVec)

{

  vtkInformation* outInfo = outInfoVec->GetInformationObject(0);
  int wext[6] = {0, 10, 0, 10, 0, 10};
  outInfo->Set(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(), wext, 6);
  return 1;

} </source>

Example 2

If outside RequestInformation, replace

<source lang="cpp"> int wext[6] = {0, 10, 0, 10, 0, 10}; image->SetExtent(wext); image->SetWholeExtent(wext); </source>

with

<source lang="cpp"> int wext[6] = {0, 10, 0, 10, 0, 10}; image->SetExtent(wext); </source>