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/* This file is part of the OpenLB library
*
* Copyright (C) 2018 Adrian Kummerlaender
* E-mail contact: info@openlb.net
* The most recent release of OpenLB can be downloaded at
* <http://www.openlb.net/>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef HYPERPLANE_LATTICE_2D_H
#define HYPERPLANE_LATTICE_2D_H
#include "core/vector.h"
#include "geometry/cuboidGeometry2D.h"
#include "hyperplane2D.h"
namespace olb {
/// Parametrization of a hyperplane lattice (i.e. a line lattice).
/**
* This class provides a common interface for describing how to discretize the intersection
* of a hyperplane given by Hyperplane2D<T> and the mother cuboid of CuboidGeometry2D<T>.
**/
template <typename T>
class HyperplaneLattice2D {
private:
CuboidGeometry2D<T>& _geometry;
/// \return max possible distance
int computeMaxLatticeDistance() const;
/// Compute _hyperplane.origin, _n so that the cuboid is right inside the geometry
void constructCuboid(int maxLatticeDistance);
/// Update _h, _n _hyperplane.u so that the length matches the given resolution
void setToResolution(int resolution);
protected:
const Hyperplane2D<T> _hyperplane;
/// Origin vector of the lattice
/**
* Note that this origin is set to a outermost point of the intersection between
* cuboid geometry and hyperplane. Thus it is different from the Hyperplane2D<T>
* origin vector in the general case.
**/
Vector<T,2> _origin;
/// Direction vector of the lattice, normalized to grid width _h
Vector<T,2> _u;
/// Distance between discrete lattice points
T _h;
/// Number of lattice points in the direction of _u
int _n;
public:
/// Constructor for automatic discretization.
/**
* i.e. the grid width is set to CuboidGeometry2D<T>::getMinDeltaR.
**/
HyperplaneLattice2D(CuboidGeometry2D<T>& geometry,
Hyperplane2D<T> hyperplane);
/// Constructor for discretization of a given resolution.
HyperplaneLattice2D(CuboidGeometry2D<T>& geometry,
Hyperplane2D<T> hyperplane,
int resolution);
/// Constructor for discretization of a given grid width.
HyperplaneLattice2D(CuboidGeometry2D<T>& geometry,
Hyperplane2D<T> hyperplane,
T h);
HyperplaneLattice2D(const HyperplaneLattice2D&) = default;
const Hyperplane2D<T>& getHyperplane() const;
/// Transform 1d lattice coordinates to their physical 2d location
Vector<T,2> getPhysR(const int& n) const;
/// \return _n
int getN() const;
/// \return _h
T getPhysSpacing() const;
/// \return _origin
Vector<T,2> getPhysOrigin() const;
/// \return _u
Vector<T,2> getVectorU() const;
};
}
#endif
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