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/*=========================================================================
Program: VMTK
Module: vtkvmtkTetGenWriter.cxx
Language: C++
Date: Sat Feb 19 22:47:34 CET 2011
Version: Revision: 1.0
Copyright (c) Luca Antiga, David Steinman. All rights reserved.
See LICENCE file for details.
Portions of this code are covered under the VTK copyright.
See VTKCopyright.txt or http://www.kitware.com/VTKCopyright.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 notices for more information.
=========================================================================*/
#include "vtkvmtkTetGenWriter.h"
#include "vtkUnstructuredGrid.h"
#include "vtkTetra.h"
#include "vtkCellType.h"
#include "vtkCell.h"
#include "vtkCellData.h"
#include "vtkIntArray.h"
#include "vtkIdTypeArray.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkvmtkConstants.h"
vtkCxxRevisionMacro(vtkvmtkTetGenWriter, "$Revision: 1.0 $");
vtkStandardNewMacro(vtkvmtkTetGenWriter);
vtkvmtkTetGenWriter::vtkvmtkTetGenWriter()
{
this->BoundaryDataArrayName = NULL;
}
vtkvmtkTetGenWriter::~vtkvmtkTetGenWriter()
{
if (this->BoundaryDataArrayName)
{
delete[] this->BoundaryDataArrayName;
this->BoundaryDataArrayName = NULL;
}
}
void vtkvmtkTetGenWriter::WriteData()
{
vtkUnstructuredGrid *input= vtkUnstructuredGrid::SafeDownCast(this->GetInput());
if (!this->FileName)
{
vtkErrorMacro(<<"FileName not set.");
return;
}
std::string nodeFileName = this->FileName;
nodeFileName += ".node";
std::string eleFileName = this->FileName;
eleFileName += ".ele";
ofstream nodeStream(nodeFileName.c_str());
ofstream eleStream(eleFileName.c_str());
if (!nodeStream.good())
{
vtkErrorMacro(<<"Could not open node file for writing.");
return;
}
if (!eleStream.good())
{
vtkErrorMacro(<<"Could not open ele file for writing.");
return;
}
input->BuildLinks();
int numberOfPoints = input->GetNumberOfPoints();
int i, j;
//TODO: add attributes and boundary markers
nodeStream << numberOfPoints << " 3 0 0" << std::endl;
double point[3];
for (i=0; i<numberOfPoints; i++)
{
input->GetPoint(i,point);
nodeStream << i+1 << " " << point[0] << " " << point[1] << " " << point[2] << std::endl;
}
#if 0
vtkIntArray* boundaryDataArray = vtkIntArray::New();
if (this->BoundaryDataArrayName)
{
if (input->GetCellData()->GetArray(this->BoundaryDataArrayName))
{
boundaryDataArray->DeepCopy(input->GetCellData()->GetArray(this->BoundaryDataArrayName));
}
else
{
vtkErrorMacro(<<"BoundaryDataArray with name specified does not exist");
boundaryDataArray->Delete();
return;
}
}
else
{
boundaryDataArray->SetNumberOfValues(numberOfCells);
boundaryDataArray->FillComponent(0,0.0);
}
#endif
vtkIdTypeArray* tetraCellIdArray = vtkIdTypeArray::New();
input->GetIdsOfCellsOfType(VTK_TETRA,tetraCellIdArray);
int numberOfTetras = tetraCellIdArray->GetNumberOfTuples();
vtkIdTypeArray* quadraticTetraCellIdArray = vtkIdTypeArray::New();
input->GetIdsOfCellsOfType(VTK_QUADRATIC_TETRA,quadraticTetraCellIdArray);
int numberOfQuadraticTetras = quadraticTetraCellIdArray->GetNumberOfTuples();
int pointsInTet = 4;
vtkIdTypeArray* tetIdsArray = tetraCellIdArray;
int numberOfOutputTetras = tetraCellIdArray->GetNumberOfTuples();
if (numberOfQuadraticTetras > numberOfTetras)
{
pointsInTet = 10;
tetIdsArray = quadraticTetraCellIdArray;
numberOfOutputTetras = quadraticTetraCellIdArray->GetNumberOfTuples();
}
//TODO: add attributes
eleStream << numberOfOutputTetras << " " << pointsInTet << " 0" << std::endl;
double point0[3], point1[3], point2[3], point3[3];
double cross[3], vector01[3], vector21[3], vector31[3];
double dot;
int tmp;
int cellPointIds[10];
for (i=0; i<numberOfOutputTetras; i++)
{
vtkIdType cellId = tetraCellIdArray->GetValue(i);
vtkCell* cell = input->GetCell(cellId);
for (j=0; j<pointsInTet; j++)
{
cellPointIds[j] = cell->GetPointId(j);
}
input->GetPoint(cellPointIds[0],point0);
input->GetPoint(cellPointIds[1],point1);
input->GetPoint(cellPointIds[2],point2);
input->GetPoint(cellPointIds[3],point3);
vector01[0] = point0[0] - point1[0];
vector01[1] = point0[1] - point1[1];
vector01[2] = point0[2] - point1[2];
vector21[0] = point2[0] - point1[0];
vector21[1] = point2[1] - point1[1];
vector21[2] = point2[2] - point1[2];
vector31[0] = point3[0] - point1[0];
vector31[1] = point3[1] - point1[1];
vector31[2] = point3[2] - point1[2];
vtkMath::Cross(vector21,vector31,cross);
dot = vtkMath::Dot(cross,vector01);
if (dot < 0.0)
{
tmp = cellPointIds[2];
cellPointIds[2] = cellPointIds[3];
cellPointIds[3] = tmp;
if (pointsInTet == 10)
{
tmp = cellPointIds[6];
cellPointIds[6] = cellPointIds[7];
cellPointIds[7] = tmp;
tmp = cellPointIds[5];
cellPointIds[5] = cellPointIds[8];
cellPointIds[8] = tmp;
}
}
eleStream << i+1 << " ";
for (j=0; j<pointsInTet; j++)
{
eleStream << cellPointIds[j]+1 << " ";
}
eleStream << std::endl;
}
tetraCellIdArray->Delete();
quadraticTetraCellIdArray->Delete();
}
void vtkvmtkTetGenWriter::PrintSelf(ostream& os, vtkIndent indent)
{
vtkUnstructuredGridWriter::PrintSelf(os,indent);
}
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