itkFEMLoadImplementationGenericBodyLoad.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkFEMLoadImplementationGenericBodyLoad.h,v $
  Language:  C++
  Date:      $Date: 2009-01-30 21:10:18 $
  Version:   $Revision: 1.7 $

  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 __itkFEMLoadImplementationGenericBodyLoad_h
#define __itkFEMLoadImplementationGenericBodyLoad_h

#include "itkFEMElementBase.h"
#include "itkFEMLoadGrav.h"

namespace itk {
namespace fem {

class LoadImplementationGenericBodyLoad
{
public:

  template<class TElementClassConstPointer>
  static void HandleLoad(TElementClassConstPointer e, Element::LoadPointer l, Element::VectorType& Fe)
    {
    // Check if we really got a LoadGrav object
    LoadGrav::Pointer l0=dynamic_cast<LoadGrav*>(&*l);
    if ( !l0 )
      {
      // Passed load object was not of class LoadGrav!
      throw FEMException(__FILE__, __LINE__, "FEM error");
      }

    // Statically cast the passed pointer to the element base class and
    // call the real load implementation with the correct pointer types.
    // If cast fails, the passed pointer was of incompatible class.
    Implementation(static_cast<Element::ConstPointer>(e),l0,Fe);
    }

private:
  static void Implementation(Element::ConstPointer element, LoadGrav::Pointer load, Element::VectorType& Fe);

  LoadImplementationGenericBodyLoad();
};

#ifdef _MSC_VER 
// Declare a static dummy function to prevent a MSVC 6.0 SP5 from crashing.
// I have no idea why things don't work when this is not declared, but it
// looks like this declaration makes compiler forget about some of the
// troubles it has with templates.
static void Dummy( void );
#endif // #ifdef _MSC_VER

}} // end namespace itk::fem

#endif // #ifndef __itkFEMLoadImplementationGenericBodyLoad_h

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