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/*=========================================================================
Program: Visualization Toolkit
Module: vtkUnstructuredGridWriter.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 "vtkUnstructuredGridWriter.h"
#include "vtkByteSwap.h"
#include "vtkCellArray.h"
#include "vtkCellIterator.h"
#include "vtkErrorCode.h"
#include "vtkInformation.h"
#include "vtkObjectFactory.h"
#include "vtkSmartPointer.h"
#include "vtkUnstructuredGrid.h"
#include <algorithm>
#include <iterator>
#include <vector>
#if !defined(_WIN32) || defined(__CYGWIN__)
#include <unistd.h> /* unlink */
#else
#include <io.h> /* unlink */
#endif
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkUnstructuredGridWriter);
void vtkUnstructuredGridWriter::WriteData()
{
ostream* fp;
vtkUnstructuredGridBase* input = vtkUnstructuredGridBase::SafeDownCast(this->GetInput());
int *types, ncells, cellId;
vtkDebugMacro(<< "Writing vtk unstructured grid data...");
if (!(fp = this->OpenVTKFile()) || !this->WriteHeader(fp))
{
if (fp)
{
vtkErrorMacro("Ran out of disk space; deleting file: " << this->FileName);
this->CloseVTKFile(fp);
unlink(this->FileName);
}
return;
}
//
// Write unstructured grid specific stuff
//
*fp << "DATASET UNSTRUCTURED_GRID\n";
// Write data owned by the dataset
if (!this->WriteDataSetData(fp, input))
{
vtkErrorMacro("Ran out of disk space; deleting file: " << this->FileName);
this->CloseVTKFile(fp);
unlink(this->FileName);
return;
}
if (!this->WritePoints(fp, input->GetPoints()))
{
vtkErrorMacro("Ran out of disk space; deleting file: " << this->FileName);
this->CloseVTKFile(fp);
unlink(this->FileName);
return;
}
// Handle face data:
if (!this->WriteCellsAndFaces(fp, input, "CELLS"))
{
vtkErrorMacro("Ran out of disk space; deleting file: " << this->FileName);
this->CloseVTKFile(fp);
unlink(this->FileName);
return;
}
//
// Cell types are a little more work
//
ncells = input->GetNumberOfCells();
if (ncells > 0)
{
types = new int[ncells];
for (cellId = 0; cellId < ncells; cellId++)
{
types[cellId] = input->GetCellType(cellId);
}
*fp << "CELL_TYPES " << ncells << "\n";
if (this->FileType == VTK_ASCII)
{
for (cellId = 0; cellId < ncells; cellId++)
{
*fp << types[cellId] << "\n";
}
}
else
{
// swap the bytes if necessary
vtkByteSwap::SwapWrite4BERange(types, ncells, fp);
}
*fp << "\n";
delete[] types;
}
if (!this->WriteCellData(fp, input))
{
vtkErrorMacro("Ran out of disk space; deleting file: " << this->FileName);
this->CloseVTKFile(fp);
unlink(this->FileName);
return;
}
if (!this->WritePointData(fp, input))
{
vtkErrorMacro("Ran out of disk space; deleting file: " << this->FileName);
this->CloseVTKFile(fp);
unlink(this->FileName);
return;
}
this->CloseVTKFile(fp);
}
int vtkUnstructuredGridWriter::WriteCellsAndFaces(
ostream* fp, vtkUnstructuredGridBase* grid, const char* label)
{
if (grid->GetNumberOfCells() == 0)
{
return 1;
}
// Create a copy of the cell data with the face streams expanded.
// Do this before writing anything so that we know the size.
// Use ints to represent vtkIdTypes, since that's what the superclass does.
vtkNew<vtkCellArray> expandedCells;
expandedCells->AllocateEstimate(grid->GetNumberOfCells(), grid->GetMaxCellSize());
vtkSmartPointer<vtkCellIterator> it =
vtkSmartPointer<vtkCellIterator>::Take(grid->NewCellIterator());
for (it->InitTraversal(); !it->IsDoneWithTraversal(); it->GoToNextCell())
{
if (it->GetCellType() != VTK_POLYHEDRON)
{
expandedCells->InsertNextCell(it->GetPointIds());
}
else
{
expandedCells->InsertNextCell(it->GetFaces());
}
}
if (expandedCells->GetNumberOfCells() == 0)
{ // Nothing to do.
return 1;
}
if (!this->WriteCells(fp, expandedCells, label))
{
vtkErrorMacro("Error while writing expanded face stream.");
return 0;
}
fp->flush();
if (fp->fail())
{
this->SetErrorCode(vtkErrorCode::OutOfDiskSpaceError);
return 0;
}
return 1;
}
int vtkUnstructuredGridWriter::FillInputPortInformation(int, vtkInformation* info)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkUnstructuredGridBase");
return 1;
}
vtkUnstructuredGridBase* vtkUnstructuredGridWriter::GetInput()
{
return vtkUnstructuredGridBase::SafeDownCast(this->Superclass::GetInput());
}
vtkUnstructuredGridBase* vtkUnstructuredGridWriter::GetInput(int port)
{
return vtkUnstructuredGridBase::SafeDownCast(this->Superclass::GetInput(port));
}
void vtkUnstructuredGridWriter::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
VTK_ABI_NAMESPACE_END
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