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102 lines
2.8 KiB
102 lines
2.8 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkMaskPolyData.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 "vtkMaskPolyData.h"
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#include "vtkCellArray.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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#include "vtkPolyData.h"
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vtkCxxRevisionMacro(vtkMaskPolyData, "$Revision: 1.45 $");
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vtkStandardNewMacro(vtkMaskPolyData);
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vtkMaskPolyData::vtkMaskPolyData()
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{
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this->OnRatio = 11;
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this->Offset = 0;
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}
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// Down sample polygonal data. Don't down sample points (that is, use the
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// original points, since usually not worth it.
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//
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int vtkMaskPolyData::RequestData(
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vtkInformation *vtkNotUsed(request),
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vtkInformationVector **inputVector,
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vtkInformationVector *outputVector)
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{
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// get the info objects
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vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
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vtkInformation *outInfo = outputVector->GetInformationObject(0);
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// get the input and ouptut
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vtkPolyData *input = vtkPolyData::SafeDownCast(
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inInfo->Get(vtkDataObject::DATA_OBJECT()));
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vtkPolyData *output = vtkPolyData::SafeDownCast(
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outInfo->Get(vtkDataObject::DATA_OBJECT()));
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vtkIdType id;
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vtkPointData *pd;
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vtkIdType numCells;
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vtkIdType *pts = 0;
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vtkIdType npts = 0;
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int abortExecute=0;
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// Check input / pass data through
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//
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numCells = input->GetNumberOfCells();
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if ( numCells < 1 )
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{
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vtkErrorMacro (<<"No PolyData to mask!");
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return 1;
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}
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output->Allocate(input,numCells);
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input->BuildCells();
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// Traverse topological lists and traverse
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//
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vtkIdType tenth = numCells/10 + 1;
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for (id=this->Offset; id < numCells && !abortExecute; id+=this->OnRatio)
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{
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if ( ! (id % tenth) )
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{
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this->UpdateProgress ((float)id/numCells);
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abortExecute = this->GetAbortExecute();
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}
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input->GetCellPoints(id, npts, pts);
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output->InsertNextCell(input->GetCellType(id), npts, pts);
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}
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// Update ourselves and release memory
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//
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output->SetPoints(input->GetPoints());
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pd = input->GetPointData();
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output->GetPointData()->PassData(pd);
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output->Squeeze();
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return 1;
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}
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void vtkMaskPolyData::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os,indent);
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os << indent << "On Ratio: " << this->OnRatio << "\n";
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os << indent << "Offset: " << this->Offset << "\n";
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}
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