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/*=========================================================================
Program: Visualization Toolkit
Module: vtkExtractSelectedBlock.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkExtractSelectedBlock.h"
#include "vtkCompositeDataIterator.h"
#include "vtkUnsignedIntArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMultiBlockDataSet.h"
#include "vtkObjectFactory.h"
#include "vtkSelection.h"
#include "vtkSelectionNode.h"
#include <set>
vtkStandardNewMacro(vtkExtractSelectedBlock);
//----------------------------------------------------------------------------
vtkExtractSelectedBlock::vtkExtractSelectedBlock()
{
}
//----------------------------------------------------------------------------
vtkExtractSelectedBlock::~vtkExtractSelectedBlock()
{
}
//----------------------------------------------------------------------------
int vtkExtractSelectedBlock::FillInputPortInformation(
int port, vtkInformation* info)
{
this->Superclass::FillInputPortInformation(port, info);
// now add our info
if (port == 0)
{
// Can work with composite datasets.
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkDataObject");
}
return 1;
}
//----------------------------------------------------------------------------
// Needed because parent class sets output type to input type
// and we sometimes want to change it to make an UnstructuredGrid regardless of
// input type
int vtkExtractSelectedBlock::RequestDataObject(
vtkInformation* req,
vtkInformationVector** inputVector ,
vtkInformationVector* outputVector)
{
vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
if (!inInfo)
{
return 0;
}
vtkCompositeDataSet *input = vtkCompositeDataSet::GetData(inInfo);
vtkInformation* outInfo = outputVector->GetInformationObject(0);
if (input)
{
vtkMultiBlockDataSet* output = vtkMultiBlockDataSet::GetData(outInfo);
if (!output)
{
output = vtkMultiBlockDataSet::New();
outInfo->Set(vtkDataObject::DATA_OBJECT(), output);
output->Delete();
}
return 1;
}
return this->Superclass::RequestDataObject(req, inputVector, outputVector);
}
//----------------------------------------------------------------------------
int vtkExtractSelectedBlock::RequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
// get the info objects
vtkInformation *selInfo = inputVector[1]->GetInformationObject(0);
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
vtkCompositeDataSet* cd = vtkCompositeDataSet::GetData(inInfo);
if (!cd)
{
vtkDataObject* outputDO = vtkDataObject::GetData(outInfo);
outputDO->ShallowCopy(vtkDataObject::GetData(inInfo));
return 1;
}
if (!selInfo)
{
//When not given a selection, quietly select nothing.
return 1;
}
vtkSelection* input = vtkSelection::GetData(selInfo);
vtkSelectionNode* node = input->GetNode(0);
if (input->GetNumberOfNodes() != 1 || node->GetContentType() != vtkSelectionNode::BLOCKS)
{
vtkErrorMacro("This filter expects a single-node selection of type BLOCKS.");
return 0;
}
vtkMultiBlockDataSet* output = vtkMultiBlockDataSet::GetData(outInfo);
bool inverse = (node->GetProperties()->Has(vtkSelectionNode::INVERSE()) &&
node->GetProperties()->Get(vtkSelectionNode::INVERSE()) == 1);
output->CopyStructure(cd);
vtkDataArray* selectionList = vtkArrayDownCast<vtkDataArray>(
node->GetSelectionList());
std::set<unsigned int> blocks;
if (selectionList)
{
vtkIdType numValues = selectionList->GetNumberOfTuples();
void * dataPtr = selectionList->GetVoidPointer(0);
switch (selectionList->GetDataType())
{
vtkTemplateMacro(
for (vtkIdType cc=0; cc < numValues; cc++)
{
blocks.insert(
static_cast<unsigned int>(static_cast<VTK_TT*>(dataPtr)[cc]));
});
}
}
vtkCompositeDataIterator* citer = cd->NewIterator();
for (citer->InitTraversal(); !citer->IsDoneWithTraversal();
citer->GoToNextItem())
{
std::set<unsigned int>::iterator fiter =
blocks.find(citer->GetCurrentFlatIndex());
if ((inverse && fiter == blocks.end()) || (!inverse && fiter != blocks.end()))
{
output->SetDataSet(citer, citer->GetCurrentDataObject());
}
}
citer->Delete();
return 1;
}
//----------------------------------------------------------------------------
void vtkExtractSelectedBlock::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
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