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/*=========================================================================
Program: Visualization Toolkit
Module: vtkReverseSense.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 "vtkReverseSense.h"
#include "vtkCellArray.h"
#include "vtkCellData.h"
#include "vtkDataArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPolyData.h"
vtkStandardNewMacro(vtkReverseSense);
// Construct object so that behavior is to reverse cell ordering and
// leave normal orientation as is.
vtkReverseSense::vtkReverseSense()
{
this->ReverseCells = 1;
this->ReverseNormals = 0;
}
int vtkReverseSense::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()));
vtkDataArray *normals=input->GetPointData()->GetNormals();
vtkDataArray *cellNormals=input->GetCellData()->GetNormals();
vtkDebugMacro(<<"Reversing sense of poly data");
output->CopyStructure(input);
output->GetPointData()->PassData(input->GetPointData());
output->GetCellData()->PassData(input->GetCellData());
//If specified, traverse all cells and reverse them
int abort=0;
vtkIdType progressInterval;
if ( this->ReverseCells )
{
vtkIdType numCells=input->GetNumberOfCells();
vtkCellArray *verts, *lines, *polys, *strips;
//Instantiate necessary topology arrays
verts = vtkCellArray::New();
verts->DeepCopy(input->GetVerts());
lines = vtkCellArray::New();
lines->DeepCopy(input->GetLines());
polys = vtkCellArray::New();
polys->DeepCopy(input->GetPolys());
strips = vtkCellArray::New();
strips->DeepCopy(input->GetStrips());
output->SetVerts(verts); verts->Delete();
output->SetLines(lines); lines->Delete();
output->SetPolys(polys); polys->Delete();
output->SetStrips(strips); strips->Delete();
progressInterval=numCells/10+1;
for (vtkIdType cellId=0; cellId < numCells && !abort; cellId++ )
{
if ( ! (cellId % progressInterval) ) //manage progress / early abort
{
this->UpdateProgress (0.6*cellId/numCells);
abort = this->GetAbortExecute();
}
output->ReverseCell(cellId);
}
}
//If specified and normals available, reverse orientation of normals.
// Using NewInstance() creates normals of the same data type.
if ( this->ReverseNormals && normals )
{
//first do point normals
vtkIdType numPoints=input->GetNumberOfPoints();
vtkDataArray *outNormals=normals->NewInstance();
outNormals->SetNumberOfComponents(normals->GetNumberOfComponents());
outNormals->SetNumberOfTuples(numPoints);
double n[3];
progressInterval=numPoints/5+1;
for ( int ptId=0; ptId < numPoints; ptId++ )
{
if ( ! (ptId % progressInterval) ) //manage progress / early abort
{
this->UpdateProgress (0.6 + 0.2*ptId/numPoints);
abort = this->GetAbortExecute();
}
normals->GetTuple(ptId,n);
n[0] = -n[0]; n[1] = -n[1]; n[2] = -n[2];
outNormals->SetTuple(ptId,n);
}
output->GetPointData()->SetNormals(outNormals);
outNormals->Delete();
}
//now do cell normals
if ( this->ReverseNormals && cellNormals )
{
vtkIdType numCells=input->GetNumberOfCells();
vtkDataArray *outNormals=cellNormals->NewInstance();
outNormals->SetNumberOfComponents(cellNormals->GetNumberOfComponents());
outNormals->SetNumberOfTuples(numCells);
double n[3];
progressInterval=numCells/5+1;
for (vtkIdType cellId=0; cellId < numCells && !abort; cellId++ )
{
if ( ! (cellId % progressInterval) ) //manage progress / early abort
{
this->UpdateProgress (0.8 + 0.2*cellId/numCells);
abort = this->GetAbortExecute();
}
cellNormals->GetTuple(cellId,n);
n[0] = -n[0]; n[1] = -n[1]; n[2] = -n[2];
outNormals->SetTuple(cellId,n);
}
output->GetCellData()->SetNormals(outNormals);
outNormals->Delete();
}
return 1;
}
void vtkReverseSense::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Reverse Cells: "
<< (this->ReverseCells ? "On\n" : "Off\n");
os << indent << "Reverse Normals: "
<< (this->ReverseNormals ? "On\n" : "Off\n");
}
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