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rAKA/src/model/common/non_local_toolbox/non_local_neighborhood.hh
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non_local_neighborhood.hh
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/**
* @file non_local_neighborhood.hh
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
* @date Sat Sep 26 18:29:59 2015
*
* @brief Non-local neighborhood for non-local averaging based on
* weight function
*
* @section LICENSE
*
* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_NON_LOCAL_NEIGHBORHOOD_HH__
#define __AKANTU_NON_LOCAL_NEIGHBORHOOD_HH__
/* -------------------------------------------------------------------------- */
#include "base_weight_function.hh"
#include "non_local_neighborhood_base.hh"
/* -------------------------------------------------------------------------- */
namespace akantu {
class NonLocalManager;
}
__BEGIN_AKANTU__
class WeightFunction {
public:
void setRadius(Real radius) {
/// set the non-local radius and update R^2 accordingly
this->R = radius;
this->R2 = this->R * this->R;
}
Real operator()(Real r,
const __attribute__((unused)) QuadraturePoint & q1,
const __attribute__((unused)) QuadraturePoint & q2) {
/// initialize the weight
Real w = 0;
/// compute weight for given r
if(r <= this->R) {
Real alpha = (1. - r*r / this->R2);
w = alpha * alpha;
// *weight = 1 - sqrt(r / radius);
}
return w;
}
void updateInternals(){};
protected:
Real R;
Real R2;
};
class NonLocalNeighborhood : public NonLocalNeighborhoodBase {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
NonLocalNeighborhood(NonLocalManager & manager, Real radius, const ID & weight_type,
const ID & id = "neighborhood",
const MemoryID & memory_id = 0);
virtual ~NonLocalNeighborhood();
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// compute the weights for non-local averaging
void computeWeights();
/// save the pair of weights in a file
void saveWeights(const std::string & filename) const;
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
private:
/// Pointer to non-local manager class
NonLocalManager * non_local_manager;
/// name of the type of weight function
const ID type;
/// the weights associated to the pairs
Array<Real> * pair_weight[2];
/// count the number of calls of computeStress
UInt compute_stress_calls;
/// weight function
WeightFunction * weight_function;
};
__END_AKANTU__
#endif /* __AKANTU_NON_LOCAL_NEIGHBORHOOD_HH__ */
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