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128 lines
3.7 KiB
128 lines
3.7 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkCellDataToPointData.cxx,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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#include "vtkCellDataToPointData.h"
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#include "vtkCellData.h"
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#include "vtkDataSet.h"
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#include "vtkIdList.h"
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#include "vtkInformation.h"
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#include "vtkInformationVector.h"
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#include "vtkObjectFactory.h"
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#include "vtkPointData.h"
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vtkCxxRevisionMacro(vtkCellDataToPointData, "$Revision: 1.31 $");
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vtkStandardNewMacro(vtkCellDataToPointData);
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//----------------------------------------------------------------------------
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// Instantiate object so that cell data is not passed to output.
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vtkCellDataToPointData::vtkCellDataToPointData()
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{
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this->PassCellData = 0;
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}
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#define VTK_MAX_CELLS_PER_POINT 4096
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//----------------------------------------------------------------------------
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int vtkCellDataToPointData::RequestData(
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vtkInformation*,
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vtkInformationVector** inputVector,
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vtkInformationVector* outputVector)
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{
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vtkInformation* info = outputVector->GetInformationObject(0);
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vtkDataSet *output = vtkDataSet::SafeDownCast(
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info->Get(vtkDataObject::DATA_OBJECT()));
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vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
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vtkDataSet *input = vtkDataSet::SafeDownCast(
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inInfo->Get(vtkDataObject::DATA_OBJECT()));
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vtkIdType cellId, ptId;
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vtkIdType numCells, numPts;
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vtkCellData *inPD=input->GetCellData();
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vtkPointData *outPD=output->GetPointData();
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vtkIdList *cellIds;
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double weight;
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double *weights;
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vtkDebugMacro(<<"Mapping cell data to point data");
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// First, copy the input to the output as a starting point
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output->CopyStructure( input );
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cellIds = vtkIdList::New();
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cellIds->Allocate(VTK_MAX_CELLS_PER_POINT);
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if ( (numPts=input->GetNumberOfPoints()) < 1 )
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{
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vtkDebugMacro(<<"No input point data!");
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cellIds->Delete();
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return 1;
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}
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weights = new double[VTK_MAX_CELLS_PER_POINT];
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// Pass the point data first. The fields and attributes
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// which also exist in the cell data of the input will
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// be over-written during CopyAllocate
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output->GetPointData()->PassData(input->GetPointData());
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// notice that inPD and outPD are vtkCellData and vtkPointData; respectively.
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// It's weird, but it works.
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outPD->CopyAllocate(inPD,numPts);
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int abort=0;
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vtkIdType progressInterval=numPts/20 + 1;
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for (ptId=0; ptId < numPts && !abort; ptId++)
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{
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if ( !(ptId % progressInterval) )
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{
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this->UpdateProgress((double)ptId/numPts);
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abort = GetAbortExecute();
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}
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input->GetPointCells(ptId, cellIds);
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numCells = cellIds->GetNumberOfIds();
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if ( numCells > 0 )
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{
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weight = 1.0 / numCells;
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for (cellId=0; cellId < numCells; cellId++)
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{
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weights[cellId] = weight;
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}
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outPD->InterpolatePoint(inPD, ptId, cellIds, weights);
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}
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else
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{
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outPD->NullPoint(ptId);
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}
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}
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if ( this->PassCellData )
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{
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output->GetCellData()->PassData(input->GetCellData());
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}
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cellIds->Delete();
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delete [] weights;
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return 1;
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}
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//----------------------------------------------------------------------------
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void vtkCellDataToPointData::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os,indent);
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os << indent << "Pass Cell Data: " << (this->PassCellData ? "On\n" : "Off\n");
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}
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