From 94d3e79a8617f88dc0219cfdeedfa3147833719d Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Mon, 24 Jun 2019 14:43:36 +0200
Subject: Initialize at openlb-1-3

---
 src/core/cell.hh | 159 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 159 insertions(+)
 create mode 100644 src/core/cell.hh

(limited to 'src/core/cell.hh')

diff --git a/src/core/cell.hh b/src/core/cell.hh
new file mode 100644
index 0000000..30ae91c
--- /dev/null
+++ b/src/core/cell.hh
@@ -0,0 +1,159 @@
+/*  This file is part of the OpenLB library
+ *
+ *  Copyright (C) 2006-2007 Jonas Latt
+ *                2015-2019 Mathias J. Krause, 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.
+*/
+
+/** \file
+ * Definition of a LB cell -- generic implementation.
+ */
+#ifndef CELL_HH
+#define CELL_HH
+
+#include <algorithm>
+#include "cell.h"
+#include "util.h"
+#include "dynamics/lbHelpers.h"
+
+namespace olb {
+
+////////////////////////// Class Cell /////////////////////////////
+
+/** The possibility to default construct Cell objects facilitates
+ * their use in various types of containers. However, they can not
+ * be used directly after construction; the method defineDynamics()
+ * must be used first.
+ */
+template<typename T, typename DESCRIPTOR>
+Cell<T,DESCRIPTOR>::Cell()
+  : dynamics(nullptr)
+{
+  initializeData();
+}
+
+/** This constructor initializes the dynamics, but not the values
+ * of the distribution functions. Remember that the dynamics is not
+ * owned by the Cell object, the user must ensure its proper
+ * destruction and a sufficient life time.
+ */
+template<typename T, typename DESCRIPTOR>
+Cell<T,DESCRIPTOR>::Cell(Dynamics<T,DESCRIPTOR>* dynamics_)
+  : dynamics(dynamics_)
+{
+  initializeData();
+}
+
+template<typename T, typename DESCRIPTOR>
+void Cell<T,DESCRIPTOR>::defineDynamics(Dynamics<T,DESCRIPTOR>* dynamics_)
+{
+  dynamics = dynamics_;
+}
+
+template<typename T, typename DESCRIPTOR>
+Dynamics<T,DESCRIPTOR> const* Cell<T,DESCRIPTOR>::getDynamics() const
+{
+  OLB_PRECONDITION(dynamics);
+  return dynamics;
+}
+
+template<typename T, typename DESCRIPTOR>
+Dynamics<T,DESCRIPTOR>* Cell<T,DESCRIPTOR>::getDynamics()
+{
+  OLB_PRECONDITION(dynamics);
+  return dynamics;
+}
+
+template<typename T, typename DESCRIPTOR>
+void Cell<T,DESCRIPTOR>::computeFeq(T fEq[descriptors::q<DESCRIPTOR>()]) const
+{
+  T rho{};
+  T u[2] {};
+  computeRhoU(rho, u);
+  const T uSqr = u[0]*u[0] + u[1]*u[1];
+  for (int iPop=0; iPop < descriptors::q<DESCRIPTOR>(); ++iPop) {
+    fEq[iPop] = lbHelpers<T,DESCRIPTOR>::equilibrium(iPop, rho, u, uSqr);
+  }
+}
+
+template <typename T, typename DESCRIPTOR>
+void Cell<T,DESCRIPTOR>::computeFneq(T fNeq[descriptors::q<DESCRIPTOR>()]) const
+{
+  T rho{};
+  T u[2] {};
+  computeRhoU(rho, u);
+  lbHelpers<T,DESCRIPTOR>::computeFneq(*this, fNeq, rho, u);
+}
+
+template<typename T, typename DESCRIPTOR>
+void Cell<T,DESCRIPTOR>::revert()
+{
+  for (int iPop=1; iPop<=descriptors::q<DESCRIPTOR>()/2; ++iPop) {
+    std::swap(this->data[iPop],this->data[iPop+descriptors::q<DESCRIPTOR>()/2]);
+  }
+}
+
+template<typename T, typename DESCRIPTOR>
+void Cell<T,DESCRIPTOR>::initializeData()
+{
+  for (int iPop=0; iPop<DESCRIPTOR::size(); ++iPop) {
+    this->data[iPop] = T();
+  }
+}
+
+template<typename T, typename DESCRIPTOR>
+void Cell<T,DESCRIPTOR>::serialize(T* data) const
+{
+  for (int i=0; i < DESCRIPTOR::size(); ++i) {
+    data[i] = this->data[i];
+  }
+}
+
+template<typename T, typename DESCRIPTOR>
+void Cell<T,DESCRIPTOR>::unSerialize(T const* data)
+{
+  for (int i=0; i < DESCRIPTOR::size(); ++i) {
+    this->data[i] = data[i];
+  }
+}
+
+
+template<typename T, typename DESCRIPTOR>
+std::size_t Cell<T,DESCRIPTOR>::getSerializableSize() const
+{
+  return sizeof(T) * DESCRIPTOR::size();
+}
+
+
+template<typename T, typename DESCRIPTOR>
+bool* Cell<T,DESCRIPTOR>::getBlock(std::size_t iBlock, std::size_t& sizeBlock, bool loadingMode)
+{
+  std::size_t currentBlock = 0;
+  bool* dataPtr = nullptr;
+
+  this->registerVar(iBlock, sizeBlock, currentBlock, dataPtr, this->data[0], DESCRIPTOR::size());
+
+  return dataPtr;
+}
+
+}  // namespace olb
+
+
+#endif
-- 
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