/usr/include/InsightToolkit/Review/itkVTKPolyDataReader.txx is in libinsighttoolkit3-dev 3.20.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Program: Insight Segmentation & Registration Toolkit
Module: itkVTKPolyDataReader.txx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/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 notices for more information.
=========================================================================*/
#ifndef __itkVTKPolyDataReader_txx
#define __itkVTKPolyDataReader_txx
#include "itkVTKPolyDataReader.h"
#include <fstream>
#include <stdio.h>
#include <string.h>
namespace itk
{
//
// Constructor
//
template<class TOutputMesh>
VTKPolyDataReader<TOutputMesh>
::VTKPolyDataReader()
{
//
// Create the output
//
typename TOutputMesh::Pointer output = TOutputMesh::New();
this->ProcessObject::SetNumberOfRequiredOutputs(1);
this->ProcessObject::SetNthOutput(0, output.GetPointer());
}
template<class TOutputMesh>
void
VTKPolyDataReader<TOutputMesh>
::GenerateData()
{
typename OutputMeshType::Pointer outputMesh = this->GetOutput();
outputMesh->SetCellsAllocationMethod(
OutputMeshType::CellsAllocatedDynamicallyCellByCell );
if( m_FileName == "" )
{
itkExceptionMacro(<< "No input FileName");
}
//
// Read input file
//
std::ifstream inputFile( m_FileName.c_str() );
if( !inputFile.is_open() )
{
itkExceptionMacro(<< "Unable to open file\n"
<< "inputFilename= " << m_FileName );
}
inputFile.imbue(std::locale::classic());
std::string line;
// The first line must be "# vtk DataFile Version x.x" where x.x can
// vary
std::getline( inputFile, m_Version, '\n' );
if (inputFile.fail())
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nUnexpected end-of-file trying to read first line.");
}
if (m_Version.find("# vtk DataFile Version ") == std::string::npos)
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nOnly vtk legacy format files can be read."
<< "\nThis file does not start with the line: # vtk DataFile Version x.x where x.x is the version.");
}
// Next is a one line description
std::getline( inputFile, m_Header, '\n' );
if (inputFile.eof())
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nUnexpected end-of-file trying to read header.");
}
// Next is the file format
std::getline( inputFile, line, '\n' );
if (inputFile.eof())
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nUnexpected end-of-file trying to file format.");
}
if (line.find("ASCII") == std::string::npos)
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nFile format is " << line
<< " but only ASCII files can be read.");
}
bool foundPoints = false;
while( !inputFile.eof() )
{
std::getline( inputFile, line, '\n' );
if( line.find("POINTS") != std::string::npos )
{
foundPoints = true;
break;
}
}
if (!foundPoints)
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nUnexpected end-of-file before finding POINTS.");
}
itkDebugMacro("POINTS line" << line );
std::string pointLine( line, strlen("POINTS "), line.length() );
itkDebugMacro("pointLine " << pointLine );
int numberOfPoints = -1;
if( sscanf(pointLine.c_str(),"%d",&numberOfPoints) != 1 )
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nFailed to read numberOfPoints.\n"
<< " pointLine= " << pointLine );
}
itkDebugMacro("numberOfPoints= " << numberOfPoints );
if( numberOfPoints < 1 )
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "numberOfPoints < 1"
<< " numberOfPoints line= " << numberOfPoints );
}
outputMesh->GetPoints()->Reserve( numberOfPoints );
//
// Load the point coordinates into the itk::Mesh
//
PointType point;
for( int i=0; i < numberOfPoints; i++ )
{
inputFile >> point;
if (inputFile.eof())
{
itkExceptionMacro(<< "Error while reading file: " << m_FileName
<< "\nUnexpected end-of-file trying to read points.");
}
if (inputFile.fail())
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nInput could not be interpreted as a point.");
}
outputMesh->SetPoint( i, point );
}
// Continue searching for the POLYGONS line
bool foundPolygons = false;
while( !inputFile.eof() )
{
std::getline( inputFile, line, '\n' );
if (line.find("POLYGONS") != std::string::npos )
{
foundPolygons = true;
break;
}
}
if (!foundPolygons)
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nUnexpected end-of-file before finding POLYGONS.");
}
itkDebugMacro( "POLYGONS line" << line );
std::string polygonLine( line, strlen("POLYGONS "), line.length() );
itkDebugMacro( "polygonLine " << polygonLine );
//
// Read the number of polygons
//
CellIdentifier numberOfPolygons = 0;
CellIdentifier numberOfIndices = 0;
if( sscanf( polygonLine.c_str(), "%ld %ld", &numberOfPolygons,
&numberOfIndices ) != 2 )
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nFailed to read numberOfPolygons from subline2"
<< "\npolygonLine = " << polygonLine );
}
itkDebugMacro("numberOfPolygons " << numberOfPolygons );
itkDebugMacro("numberOfIndices " << numberOfIndices );
if( numberOfPolygons < 1 )
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nnumberOfPolygons < 1\nnumberOfPolygons= "
<< numberOfPolygons );
}
if( numberOfIndices < numberOfPolygons )
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nnumberOfIndices < numberOfPolygons\n"
<< "numberOfIndices= " << numberOfIndices << "\n"
<< "numberOfPolygons= " << numberOfPolygons );
}
//
// Load the polygons into the itk::Mesh
//
PointIdentifier numberOfCellPoints;
long ids[3];
for(CellIdentifier i=0; i<numberOfPolygons; i++)
{
std::getline( inputFile, line, '\n' );
if( inputFile.eof() )
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nFailed to read " << numberOfPolygons
<< " polygons before the end of file."
<< " Only read " << i+1);
}
if( line.find("DATA") != std::string::npos )
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nRead keyword DATA");
}
int got;
if( (got = sscanf( line.c_str(), "%ld %ld %ld %ld", &numberOfCellPoints,
&ids[0], &ids[1], &ids[2] )) != 4 )
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nError parsing POLYGON cell. Expected 4 items but got "
<< got << std::endl
<< "Line is: " << line);
}
if( numberOfCellPoints != 3 )
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nnumberOfCellPoints != 3\n"
<< "numberOfCellPoints= " << numberOfCellPoints
<< ". VTKPolyDataReader can only read triangles");
}
if( static_cast<long>(ids[0]) < 0 ||
static_cast<long>(ids[1]) < 0 ||
static_cast<long>(ids[2]) < 0 )
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "point ids must be >= 0.\n"
"ids=" << ids[0] << " " << ids[1] << " " << ids[2]);
}
if( static_cast<long>(ids[0]) >= numberOfPoints ||
static_cast<long>(ids[1]) >= numberOfPoints ||
static_cast<long>(ids[2]) >= numberOfPoints )
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "Point ids must be < number of points: "
<< numberOfPoints
<< "\nids= " << ids[0] << " " << ids[1] << " " << ids[2]);
}
CellAutoPointer cell;
TriangleCellType * triangleCell = new TriangleCellType;
for( PointIdentifier k = 0; k < numberOfCellPoints; k++ )
{
triangleCell->SetPointId( k, ids[k] );
}
cell.TakeOwnership( triangleCell );
outputMesh->SetCell( i, cell );
}
bool foundPointData = false;
while( !inputFile.eof() )
{
std::getline( inputFile, line, '\n' );
if( line.find("POINT_DATA") != std::string::npos )
{
foundPointData = true;
break;
}
}
if( foundPointData )
{
typedef typename OutputMeshType::PointDataContainer PointDataContainer;
outputMesh->SetPointData( PointDataContainer::New() );
outputMesh->GetPointData()->Reserve( numberOfPoints );
itkDebugMacro("POINT_DATA line" << line );
// Skip two lines
if (!inputFile.eof())
{
std::getline( inputFile, line, '\n' );
}
else
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nUnexpected end-of-file while trying to read POINT_DATA.");
}
if (!inputFile.eof())
{
std::getline( inputFile, line, '\n' );
}
else
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nUnexpected end-of-file while trying to read POINT_DATA.");
}
double pointData;
for( int pid=0; pid < numberOfPoints; pid++ )
{
if (inputFile.eof())
{
itkExceptionMacro(<< "Error reading file: " << m_FileName
<< "\nUnexpected end-of-file while trying to read POINT_DATA."
<< "Failed while trying to reading point data for id: " << pid);
}
inputFile >> pointData;
outputMesh->SetPointData( pid, pointData );
}
}
inputFile.close();
}
template<class TOutputMesh>
void
VTKPolyDataReader<TOutputMesh>
::PrintSelf( std::ostream& os, Indent indent ) const
{
Superclass::PrintSelf(os,indent);
os << indent << "FileName: " << m_FileName << std::endl;
os << indent << "Version: " << m_Version << std::endl;
os << indent << "Header: " << m_Header << std::endl;
}
} //end of namespace itk
#endif
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