OpenWalnut  1.4.0
WWriterFiberVTK.cpp
00001 //---------------------------------------------------------------------------
00002 //
00003 // Project: OpenWalnut ( http://www.openwalnut.org )
00004 //
00005 // Copyright 2009 OpenWalnut Community, BSV@Uni-Leipzig and CNCF@MPI-CBS
00006 // For more information see http://www.openwalnut.org/copying
00007 //
00008 // This file is part of OpenWalnut.
00009 //
00010 // OpenWalnut is free software: you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as published by
00012 // the Free Software Foundation, either version 3 of the License, or
00013 // (at your option) any later version.
00014 //
00015 // OpenWalnut is distributed in the hope that it will be useful,
00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00018 // GNU Lesser General Public License for more details.
00019 //
00020 // You should have received a copy of the GNU Lesser General Public License
00021 // along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>.
00022 //
00023 //---------------------------------------------------------------------------
00024 
00025 #include <fstream>
00026 #include <string>
00027 
00028 #include <boost/filesystem.hpp>
00029 #include <boost/shared_ptr.hpp>
00030 
00031 #include "../../common/WAssert.h"
00032 #include "../../common/WIOTools.h"
00033 #include "../WDataSetFiberVector.h"
00034 #include "../exceptions/WDHIOFailure.h"
00035 #include "WWriterFiberVTK.h"
00036 
00037 WWriterFiberVTK::WWriterFiberVTK( const boost::filesystem::path& path, bool overwrite )
00038     : WWriter( path.string(), overwrite )
00039 {
00040 }
00041 void WWriterFiberVTK::writeFibs( boost::shared_ptr< const WDataSetFibers > fiberDS ) const
00042 {
00043     writeFibs( boost::shared_ptr< WDataSetFiberVector >( new WDataSetFiberVector( fiberDS ) ) );
00044 }
00045 
00046 void WWriterFiberVTK::writeFibs( boost::shared_ptr< const WDataSetFiberVector > fiberDS ) const
00047 {
00048     using std::fstream;
00049     fstream out( m_fname.c_str(), fstream::out | fstream::in | fstream::trunc );
00050     if( !out || out.bad() )
00051     {
00052         throw WDHIOFailure( std::string( "Invalid file, or permission: " + m_fname ) );
00053     }
00054     // We use '\n' as line delimiter so also files written under windows (having '\r\n' as delimtier) may be read anywhere
00055     char lineDelimiter = '\n';
00056 
00057     out << "# vtk DataFile Version 3.0" << lineDelimiter;
00058     out << "Fibers from OpenWalnut" << lineDelimiter;
00059     out << "BINARY" << lineDelimiter;
00060     out << "DATASET POLYDATA" << lineDelimiter;
00061     unsigned int numPoints = 0;
00062     unsigned int numLines = fiberDS->size();
00063     for( size_t i = 0; i < fiberDS->size(); ++i )
00064     {
00065         numPoints += (*fiberDS)[i].size();
00066     }
00067     out << "POINTS " << numPoints << " float" << lineDelimiter;
00068     unsigned int *rawLineData = new unsigned int[numPoints + numLines];
00069     float *rawPointData = new float[numPoints * 3];
00070 
00071     unsigned int pntPosOffset = 0;
00072     unsigned int lnsPosOffset = 0;
00073     for( size_t i = 0; i < fiberDS->size(); ++i )
00074     {
00075         const WFiber &fib = (*fiberDS)[i];
00076         rawLineData[lnsPosOffset++] = static_cast< unsigned int >( fib.size() );
00077         for( size_t j = 0; j < fib.size(); ++j )
00078         {
00079             const WPosition &point = fib[j];
00080             WAssert( pntPosOffset % 3 == 0, "(pOff % 3) was not equal to 0" );
00081             WAssert( pntPosOffset / 3 < numPoints, "pntPosOffset is to large." );
00082             rawLineData[lnsPosOffset++] = static_cast< unsigned int >( pntPosOffset / 3 );
00083             rawPointData[pntPosOffset++] = static_cast< float >( point[0] );
00084             rawPointData[pntPosOffset++] = static_cast< float >( point[1] );
00085             rawPointData[pntPosOffset++] = static_cast< float >( point[2] );
00086             WAssert( pntPosOffset < ( ( numPoints * 3 ) + 1 ), "pOff < #pts" );
00087         }
00088     }
00089     switchByteOrderOfArray< float >( rawPointData, numPoints * 3 );
00090     switchByteOrderOfArray< unsigned int >( rawLineData, numLines + numPoints );
00091     out.write( reinterpret_cast< char* >( rawPointData ), sizeof( float ) * numPoints * 3 );
00092     out << lineDelimiter;
00093     out << "LINES " << numLines << " " << numPoints + numLines << lineDelimiter;
00094     out.write( reinterpret_cast< char* >( rawLineData ), sizeof( unsigned int ) * ( numPoints + numLines ) );
00095     out << lineDelimiter;
00096     out.close();
00097 }