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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkCellDataToPointData.cxx,v $
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 "vtkCellDataToPointData.h"
#include "vtkCellData.h"
#include "vtkDataSet.h"
#include "vtkIdList.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
vtkCxxRevisionMacro(vtkCellDataToPointData, "$Revision: 1.31 $");
vtkStandardNewMacro(vtkCellDataToPointData);
//----------------------------------------------------------------------------
// Instantiate object so that cell data is not passed to output.
vtkCellDataToPointData::vtkCellDataToPointData()
{
this->PassCellData = 0;
}
#define VTK_MAX_CELLS_PER_POINT 4096
//----------------------------------------------------------------------------
int vtkCellDataToPointData::RequestData(
vtkInformation*,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
vtkInformation* info = outputVector->GetInformationObject(0);
vtkDataSet *output = vtkDataSet::SafeDownCast(
info->Get(vtkDataObject::DATA_OBJECT()));
vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
vtkDataSet *input = vtkDataSet::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkIdType cellId, ptId;
vtkIdType numCells, numPts;
vtkCellData *inPD=input->GetCellData();
vtkPointData *outPD=output->GetPointData();
vtkIdList *cellIds;
double weight;
double *weights;
vtkDebugMacro(<<"Mapping cell data to point data");
// First, copy the input to the output as a starting point
output->CopyStructure( input );
cellIds = vtkIdList::New();
cellIds->Allocate(VTK_MAX_CELLS_PER_POINT);
if ( (numPts=input->GetNumberOfPoints()) < 1 )
{
vtkDebugMacro(<<"No input point data!");
cellIds->Delete();
return 1;
}
weights = new double[VTK_MAX_CELLS_PER_POINT];
// Pass the point data first. The fields and attributes
// which also exist in the cell data of the input will
// be over-written during CopyAllocate
output->GetPointData()->PassData(input->GetPointData());
// notice that inPD and outPD are vtkCellData and vtkPointData; respectively.
// It's weird, but it works.
outPD->CopyAllocate(inPD,numPts);
int abort=0;
vtkIdType progressInterval=numPts/20 + 1;
for (ptId=0; ptId < numPts && !abort; ptId++)
{
if ( !(ptId % progressInterval) )
{
this->UpdateProgress((double)ptId/numPts);
abort = GetAbortExecute();
}
input->GetPointCells(ptId, cellIds);
numCells = cellIds->GetNumberOfIds();
if ( numCells > 0 )
{
weight = 1.0 / numCells;
for (cellId=0; cellId < numCells; cellId++)
{
weights[cellId] = weight;
}
outPD->InterpolatePoint(inPD, ptId, cellIds, weights);
}
else
{
outPD->NullPoint(ptId);
}
}
if ( this->PassCellData )
{
output->GetCellData()->PassData(input->GetCellData());
}
cellIds->Delete();
delete [] weights;
return 1;
}
//----------------------------------------------------------------------------
void vtkCellDataToPointData::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Pass Cell Data: " << (this->PassCellData ? "On\n" : "Off\n");
}
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