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/*=========================================================================
Program: Visualization Toolkit
Module: vtkMaskPolyData.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 "vtkMaskPolyData.h"
#include "vtkCellArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPolyData.h"
vtkStandardNewMacro(vtkMaskPolyData);
vtkMaskPolyData::vtkMaskPolyData()
{
this->OnRatio = 11;
this->Offset = 0;
}
// Down sample polygonal data. Don't down sample points (that is, use the
// original points, since usually not worth it.
//
int vtkMaskPolyData::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
vtkPolyData *input = vtkPolyData::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkPolyData *output = vtkPolyData::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkIdType id;
vtkPointData *pd;
vtkIdType numCells;
vtkIdType *pts = 0;
vtkIdType npts = 0;
int abortExecute=0;
// Check input / pass data through
//
numCells = input->GetNumberOfCells();
if ( numCells < 1 )
{
vtkErrorMacro (<<"No PolyData to mask!");
return 1;
}
output->Allocate(input,numCells);
input->BuildCells();
// Traverse topological lists and traverse
//
vtkIdType tenth = numCells/10 + 1;
for (id=this->Offset; id < numCells && !abortExecute; id+=this->OnRatio)
{
if ( ! (id % tenth) )
{
this->UpdateProgress ((float)id/numCells);
abortExecute = this->GetAbortExecute();
}
input->GetCellPoints(id, npts, pts);
output->InsertNextCell(input->GetCellType(id), npts, pts);
}
// Update ourselves and release memory
//
output->SetPoints(input->GetPoints());
pd = input->GetPointData();
output->GetPointData()->PassData(pd);
output->Squeeze();
return 1;
}
void vtkMaskPolyData::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "On Ratio: " << this->OnRatio << "\n";
os << indent << "Offset: " << this->Offset << "\n";
}
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