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ref_point.hh
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/**
* @file ref_point.hh
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
*
* @date Mon Sep 08 23:40:22 2014
*
* @brief This is the class for reference that are any reference using a
* point-like description should inheritate from
*
* @section LICENSE
*
* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* LibMultiScale 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.
*
* LibMultiScale 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 LibMultiScale. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef __LIBMULTISCALE_REF_POINT_HH__
#define __LIBMULTISCALE_REF_POINT_HH__
/* -------------------------------------------------------------------------- */
#include "cube.hh"
#include "lm_common.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_LIBMULTISCALE__
/* -------------------------------------------------------------------------- */
template <UInt _Dim> class RefPoint {
public:
static constexpr UInt Dim = _Dim;
RefPoint(){};
virtual ~RefPoint(){};
//! get the distance between the current reference and a point, pbc corrected
template <bool pbc_x, bool pbc_y, bool pbc_z, typename Vec1, typename Vec2>
static inline Real computeDistance(Vec1 &&pos1, Vec2 &&pos2,
Cube &bounding_box);
//! return the dof_type
virtual int getDOFType() { return dt_master; };
protected:
//! compute the distance between points pbc corrected (internal)
template <bool pbc_x, bool pbc_y, bool pbc_z, typename Vec1, typename Vec2,
typename Vec3, typename Vec4>
static inline Real computeDistance(Vec1 &&pos1, Vec2 &&pos2, Vec3 &&d_size,
Vec4 &&d_size_half);
};
/* -------------------------------------------------------------------------- */
template <UInt Dim>
template <bool pbc_x, bool pbc_y, bool pbc_z, typename Vec1, typename Vec2,
typename Vec3, typename Vec4>
inline Real RefPoint<Dim>::computeDistance(Vec1 &&pos1, Vec2 &&pos2,
Vec3 &&d_size,
Vec4 &&d_inv_size_half) {
auto &x = pos1;
Real dx[Dim];
Real d2 = 0.0;
for (UInt i = 0; i < Dim; ++i) {
dx[i] = x[i] - pos2[i];
if ((pbc_x && i == 0) || (pbc_y && i == 1) || (pbc_z && i == 2)) {
int offset = static_cast<int>(dx[i] * d_inv_size_half[i]);
dx[i] -= offset * d_size[i];
}
d2 += dx[i] * dx[i];
}
return d2;
}
/* ------------------------------------------------------------------------ */
template <UInt Dim>
template <bool pbc_x, bool pbc_y, bool pbc_z, typename Vec1, typename Vec2>
inline Real RefPoint<Dim>::computeDistance(Vec1 &&pos1, Vec2 &&pos2,
Cube &bounding_box) {
return computeDistance<pbc_x, pbc_y, pbc_z>(
pos1, pos2, bounding_box.getSize(), bounding_box.getInvSizeHalf());
}
__END_LIBMULTISCALE__
#endif /* __LIBMULTISCALE_REF_POINT_HH__ */

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