Difference between revisions of "VTK/VTK 6 Migration/Removal of SetWholeExtent"
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= Removal of SetWholeExtent() from vtkDataObject = | = 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. | VTK 6 introduces a number of backwards-incompatible changes. The reasons behind these changes are described in more detail [[VTK/VTK_6_Migration/Overview | here]]. 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 == | == Example 1 == |
Latest revision as of 19:08, 6 April 2012
Removal of SetWholeExtent() from vtkDataObject
VTK 6 introduces a number of backwards-incompatible changes. The reasons behind these changes are described in more detail here. 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
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;
}
with
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;
}
Example 2
If outside RequestInformation, replace
int wext[6] = {0, 10, 0, 10, 0, 10};
image->SetExtent(wext);
image->SetWholeExtent(wext);
with
int wext[6] = {0, 10, 0, 10, 0, 10};
image->SetExtent(wext);