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/*=========================================================================
Program: Visualization Toolkit
Module: vtkCellCenters.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 "vtkCellCenters.h"
#include "vtkCell.h"
#include "vtkCellData.h"
#include "vtkDataSet.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
#include "vtkPolyData.h"
#include "vtkCellArray.h"
vtkStandardNewMacro(vtkCellCenters);
//----------------------------------------------------------------------------
// Construct object with vertex cell generation turned off.
vtkCellCenters::vtkCellCenters()
{
this->VertexCells = 0;
}
//----------------------------------------------------------------------------
// Generate points
int vtkCellCenters::RequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
// get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
// get the input and output
vtkDataSet *input = vtkDataSet::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkPolyData *output = vtkPolyData::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkIdType cellId, numCells;
int subId;
vtkCellData *inCD;
vtkPointData *outPD;
vtkPoints *newPts;
vtkCell *cell;
double x[3], pcoords[3];
double *weights;
inCD=input->GetCellData();
outPD=output->GetPointData();
if ( (numCells = input->GetNumberOfCells()) < 1 )
{
vtkDebugMacro(<<"No cells to generate center points for");
return 1;
}
newPts = vtkPoints::New();
newPts->SetNumberOfPoints(numCells);
weights = new double [input->GetMaxCellSize()];
int abort=0;
vtkIdType progressInterval = numCells/10 + 1;
int hasEmptyCells = 0;
for (cellId=0; cellId < numCells && !abort; cellId++)
{
if ( ! (cellId % progressInterval) )
{
vtkDebugMacro(<<"Processing #" << cellId);
this->UpdateProgress (0.5*cellId/numCells);
abort = this->GetAbortExecute();
}
cell = input->GetCell(cellId);
if (cell->GetCellType() != VTK_EMPTY_CELL)
{
subId = cell->GetParametricCenter(pcoords);
cell->EvaluateLocation(subId, pcoords, x, weights);
newPts->SetPoint(cellId,x);
}
else
{
hasEmptyCells = 1;
}
}
if ( this->VertexCells )
{
vtkIdType pts[1];
vtkCellData *outCD=output->GetCellData();
vtkCellArray *verts = vtkCellArray::New();
verts->Allocate(verts->EstimateSize(1,numCells),1);
for (cellId=0; cellId < numCells && !abort; cellId++)
{
if ( ! (cellId % progressInterval) )
{
vtkDebugMacro(<<"Processing #" << cellId);
this->UpdateProgress (0.5+0.5*cellId/numCells);
abort = this->GetAbortExecute();
}
cell = input->GetCell(cellId);
if (cell->GetCellType() != VTK_EMPTY_CELL)
{
pts[0] = cellId;
verts->InsertNextCell(1,pts);
}
}
output->SetVerts(verts);
verts->Delete();
if (!hasEmptyCells)
{
outCD->PassData(inCD); //only if verts are generated
}
}
// clean up and update output
output->SetPoints(newPts);
newPts->Delete();
if (!hasEmptyCells)
{
outPD->PassData(inCD); //because number of points = number of cells
}
delete [] weights;
return 1;
}
//----------------------------------------------------------------------------
int vtkCellCenters::FillInputPortInformation(int, vtkInformation *info)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkDataSet");
return 1;
}
//----------------------------------------------------------------------------
void vtkCellCenters::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Vertex Cells: " << (this->VertexCells ? "On\n" : "Off\n");
}
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