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vtkExtractSelectedPolyDataIds.cxx
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vtkExtractSelectedPolyDataIds.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkExtractSelectedPolyDataIds.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 "vtkExtractSelectedPolyDataIds.h"
#include "vtkCellArray.h"
#include "vtkCellData.h"
#include "vtkFloatArray.h"
#include "vtkIdTypeArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPolyData.h"
#include "vtkSelection.h"
#include "vtkSelectionNode.h"
vtkStandardNewMacro(vtkExtractSelectedPolyDataIds);
//----------------------------------------------------------------------------
vtkExtractSelectedPolyDataIds::vtkExtractSelectedPolyDataIds()
{
this->SetNumberOfInputPorts(2);
}
//----------------------------------------------------------------------------
vtkExtractSelectedPolyDataIds::~vtkExtractSelectedPolyDataIds()
{
}
//----------------------------------------------------------------------------
int vtkExtractSelectedPolyDataIds::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);
// get the input and output
vtkPolyData *input = vtkPolyData::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkPolyData *output = vtkPolyData::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkSelection *sel = vtkSelection::SafeDownCast(
selInfo->Get(vtkDataObject::DATA_OBJECT()));
if ( ! sel )
{
vtkErrorMacro(<<"No selection specified");
return 1;
}
vtkPointData *pd = input->GetPointData();
vtkCellData *cd = input->GetCellData();
vtkPointData *outputPD = output->GetPointData();
vtkCellData *outputCD = output->GetCellData();
vtkDebugMacro(<< "Extracting poly data geometry");
vtkSelectionNode* node = 0;
if (sel->GetNumberOfNodes() == 1)
{
node = sel->GetNode(0);
}
if (!node)
{
return 1;
}
if (!node->GetProperties()->Has(vtkSelectionNode::CONTENT_TYPE()) ||
node->GetProperties()->Get(vtkSelectionNode::CONTENT_TYPE()) != vtkSelectionNode::INDICES ||
!node->GetProperties()->Has(vtkSelectionNode::FIELD_TYPE()) ||
node->GetProperties()->Get(vtkSelectionNode::FIELD_TYPE()) != vtkSelectionNode::CELL)
{
return 1;
}
vtkIdTypeArray* idArray =
vtkArrayDownCast<vtkIdTypeArray>(node->GetSelectionList());
if (!idArray)
{
return 1;
}
vtkIdType numCells =
idArray->GetNumberOfComponents()*idArray->GetNumberOfTuples();
if (numCells == 0)
{
return 1;
}
output->Allocate(numCells);
output->SetPoints(input->GetPoints());
outputPD->PassData(pd);
outputCD->CopyAllocate(cd);
// Now loop over all cells to see whether they are in the selection.
// Copy if they are.
vtkIdList* ids = vtkIdList::New();
vtkIdType numInputCells = input->GetNumberOfCells();
for (vtkIdType i=0; i < numCells; i++)
{
vtkIdType cellId = idArray->GetValue(i);
if (cellId >= numInputCells)
{
continue;
}
input->GetCellPoints(cellId, ids);
vtkIdType newId = output->InsertNextCell(
input->GetCellType(cellId), ids);
outputCD->CopyData(cd, cellId, newId);
}
ids->Delete();
output->Squeeze();
return 1;
}
//----------------------------------------------------------------------------
void vtkExtractSelectedPolyDataIds::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
}
//----------------------------------------------------------------------------
int vtkExtractSelectedPolyDataIds::FillInputPortInformation(
int port, vtkInformation* info)
{
if (port==0)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkPolyData");
}
else
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkSelection");
}
return 1;
}