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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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
*
* http://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.
*
*=========================================================================*/
#include "itkFEMLoadPoint.h"
namespace itk
{
namespace fem
{
::itk::LightObject::Pointer LoadPoint::CreateAnother(void) const
{
::itk::LightObject::Pointer smartPtr;
Pointer copyPtr = Self::New();
copyPtr->m_Point = this->m_Point;
copyPtr->m_ForcePoint = this->m_ForcePoint;
copyPtr->SetGlobalNumber( this->GetGlobalNumber() );
smartPtr = static_cast<Pointer>(copyPtr);
return smartPtr;
}
void LoadPoint::SetPoint(const vnl_vector<Float> p)
{
this->m_Point = p;
}
vnl_vector<itk::fem::Element::Float> LoadPoint::GetPoint()
{
return this->m_Point;
}
void LoadPoint::SetForce(const vnl_vector<Float> f)
{
this->m_ForcePoint = f;
}
vnl_vector<itk::fem::Element::Float> LoadPoint::GetForce()
{
return this->m_ForcePoint;
}
void LoadPoint::ApplyLoad(Element::ConstPointer element, Element::VectorType & Fe)
{
const unsigned int NnDOF = element->GetNumberOfDegreesOfFreedomPerNode();
const unsigned int Nnodes = element->GetNumberOfNodes();
Element::VectorType force(NnDOF, 0.0);
Element::VectorType shapeF;
Fe.set_size( element->GetNumberOfDegreesOfFreedom() );
Fe.fill(0.0);
force = this->GetForce();
// Retrieve the local coordinate at which the force acts
Element::VectorType pt = this->GetPoint();
// "Integrate" at the location of the point load
shapeF = element->ShapeFunctions(pt);
// Calculate the equivalent nodal loads
for( unsigned int n = 0; n < Nnodes; n++ )
{
for( unsigned int d = 0; d < NnDOF; d++ )
{
Fe[n * NnDOF + d] += shapeF[n] * force[d];
}
}
}
void LoadPoint::PrintSelf(std::ostream& os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Point: " << this->m_Point << std::endl;
os << indent << "Force Point: " << this->m_ForcePoint << std::endl;
}
}
} // end namespace itk::fem
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