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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkFEMMaterialLinearElasticity.cxx,v $
Language: C++
Date: $Date: 2009-01-30 21:10:19 $
Version: $Revision: 1.13 $
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.
=========================================================================*/
// disable debug warnings in MS compiler
#ifdef _MSC_VER
#pragma warning(disable: 4786)
#endif
#include "itkFEMMaterialLinearElasticity.h"
namespace itk {
namespace fem {
/**
* Default constructor
*/
MaterialLinearElasticity::MaterialLinearElasticity() :
E(100.0), A(1.0), I(1.0), nu(0.2), h(1.0), RhoC(1.0)
{}
/**
* Read Linear elasticity material object form stream
*/
void MaterialLinearElasticity::Read(std::istream& f, void* info)
{
double d;
std::streampos l(0);
char buf[256];
std::string s;
std::string::size_type b,e;
// first call the parent's read function
Superclass::Read(f, info);
// clear the data already inside the object
E=0.0; A=0.0; I=0.0; nu=0.0; h=1.0; RhoC=1.0;
/*
* Next we read any known constant from stream. This allows a user to
* specify only constants which are actually required by elements in
* a system. This makes creating input files a bit easier.
*/
while(f)
{
#ifndef __sgi
l=f.tellg(); // remember the stream position
#endif
this->SkipWhiteSpace(f); // skip comments and whitespaces
/**
* All Constants are in the following format:
* constant_name : value
*/
f.getline(buf,256,':'); // read up to 256 characters until ':' is reached. we read and discard the ':'
if (!f)
{
goto out;
} // no : was found
s=std::string(buf);
// Get rid of the whitespaces in front of and the back of token
b=s.find_first_not_of(whitespaces); // end of whitespaces in the beginning
if ( (e=s.find_first_of(whitespaces,b)) == std::string::npos ) // beginning of whitespaces at the end
e=s.size();
/*
* s now contains just the name of the constant.
* The value is ready to be read next from the stream
*/
s=s.substr(b,e-b);
if (s=="E")
{
f>>d; if(!f) goto out;
E=d;
continue;
}
if (s=="A")
{
f>>d; if(!f) goto out;
A=d;
continue;
}
if (s=="I")
{
this->SkipWhiteSpace(f); f>>d; if(!f) goto out;
I=d;
continue;
}
if (s=="nu")
{
this->SkipWhiteSpace(f); f>>d; if(!f) goto out;
nu=d;
continue;
}
if (s=="h")
{
this->SkipWhiteSpace(f); f>>d; if(!f) goto out;
h=d;
continue;
}
if (s=="RhoC")
{
this->SkipWhiteSpace(f); f>>d; if(!f) goto out;
RhoC=d;
continue;
}
if (s=="END")
{
// End of constants in material definition
goto out;
}
/**
* If we got here an unknown constant was reached.
* We reset the stream position and set the stream error.
*/
#ifndef __sgi
f.seekg(l);
f.clear(std::ios::failbit);
#endif
}
out:
if( !f )
{
throw FEMExceptionIO(__FILE__,__LINE__,"MaterialLinearElasticity::Read()","Error reading FEM material!");
}
}
/**
* Write linear elasticity material object to stream
*/
void MaterialLinearElasticity::Write( std::ostream& f ) const
{
// First call the parent's write function
Superclass::Write(f);
/// Then write the actual data
f<<"\tE : "<<E<<"\t% Young modulus\n";
f<<"\tA : "<<A<<"\t% Beam crossection area\n";
f<<"\tI : "<<I<<"\t% Moment of inertia\n";
f<<"\tnu : "<<nu<<"\t% Poisson's ratio\n";
f<<"\th : "<<h<<"\t% Plate thickness\n";
f<<"\tRhoC : "<<RhoC<<"\t% Density times capacity\n";
f<<"\tEND:\t% End of material definition\n";
// check for errors
if (!f)
{
throw FEMExceptionIO(__FILE__,__LINE__,"MaterialLinearElasticity::Write()","Error writing FEM material!");
}
}
FEM_CLASS_REGISTER(MaterialLinearElasticity)
}} // end namespace itk::fem
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