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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkFEMLoadBC_h
#define itkFEMLoadBC_h
#include "itkFEMLoadBase.h"
#include "ITKFEMExport.h"
namespace itk
{
namespace fem
{
/**
* \class LoadBC
* \brief Generic essential (Dirichlet) boundary conditions.
*
* Objects of this class specify, which DOFs in a system are fixed.
* \ingroup ITKFEM
*/
class ITKFEM_EXPORT LoadBC : public Load
{
public:
/** Standard class type aliases. */
using Self = LoadBC;
using Superclass = Load;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkSimpleNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(LoadBC);
/** CreateAnother method will clone the existing instance of this type,
* including its internal member variables. */
itk::LightObject::Pointer
CreateAnother() const override;
/** Default constructor */
LoadBC()
: m_Value()
{}
/** Set the number of degrees of freedom*/
void
SetDegreeOfFreedom(int dof);
/** Get the number of degrees of freedom*/
int
GetDegreeOfFreedom() const;
/** Set the boundary condition using vector representation*/
void
SetValue(const vnl_vector<Element::Float> val);
/** Get the boundary condition as vector representation*/
vnl_vector<Element::Float>
GetValue() const;
protected:
void
PrintSelf(std::ostream & os, Indent indent) const override;
/**
* Local DOF number within the Element object.
*/
unsigned int m_DegreeOfFreedom{ 0 };
/**
* Value which the DOF is being fixed.
*
* \note This is a vector so that implementation of BC on isotropic elements
* is easy. Which value is applied to the master force vector is
* defined by optional dim parameter (defaults to 0) in AssembleF
* function in solver.
*/
vnl_vector<Element::Float> m_Value{};
};
} // end namespace fem
} // end namespace itk
#endif // itkFEMLoadBC_h
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