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/dynamics/rtlbmDescriptors.h | 104 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 src/dynamics/rtlbmDescriptors.h

(limited to 'src/dynamics/rtlbmDescriptors.h')

diff --git a/src/dynamics/rtlbmDescriptors.h b/src/dynamics/rtlbmDescriptors.h
new file mode 100644
index 0000000..3d435b8
--- /dev/null
+++ b/src/dynamics/rtlbmDescriptors.h
@@ -0,0 +1,104 @@
+/*  This file is part of the OpenLB library
+ *
+ *  Copyright (C) 2017-2019 Albert Mink, 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
+ *  -- header file
+ */
+#ifndef RTLBM_DESCRIPTORS_H
+#define RTLBM_DESCRIPTORS_H
+
+#include "latticeDescriptors.h"
+
+namespace olb {
+
+namespace descriptors {
+
+namespace tag {
+
+struct RTLBM : public CATEGORY, public DESCRIPTOR_TAG { };
+
+}
+
+using D3Q7DescriptorRTLBM  = D3Q7<>;
+using D3Q19DescriptorRTLBM = D3Q19<>;
+using D3Q27DescriptorRTLBM = D3Q27<tag::RTLBM>;
+
+namespace rtlbm_data {
+
+using utilities::Fraction;
+
+template <unsigned D, unsigned Q>
+constexpr Fraction t[Q] = {};
+
+template <>
+constexpr Fraction t<3,27>[27] = {
+  0,
+
+  {1, 21}, {1, 21}, {1, 21},
+  {4, 105}, {4, 105}, {4, 105},
+  {4, 105}, {4, 105}, {4, 105},
+  {9, 280}, {9, 280}, {9, 280}, {9, 280},
+
+  {1, 21}, {1, 21}, {1, 21},
+  {4, 105}, {4, 105}, {4, 105},
+  {4, 105}, {4, 105}, {4, 105},
+  {9, 280}, {9, 280}, {9, 280}, {9, 280}
+};
+
+template<typename T>
+constexpr T norm_c_3_27[27] = {
+  0.0,
+  1.0, 1.0, 1.0,
+  1.41421356237, 1.41421356237, 1.41421356237,
+  1.41421356237, 1.41421356237, 1.41421356237,
+  1.73205080757, 1.73205080757, 1.73205080757, 1.73205080757,
+  1.0, 1.0, 1.0,
+  1.41421356237, 1.41421356237, 1.41421356237,
+  1.41421356237, 1.41421356237, 1.41421356237,
+  1.73205080757, 1.73205080757, 1.73205080757, 1.73205080757
+};
+
+}
+
+template <typename T, unsigned D, unsigned Q>
+constexpr T t(unsigned iPop, tag::RTLBM)
+{
+  return rtlbm_data::t<D,Q>[iPop].template as<T>();
+}
+
+template <typename T, typename DESCRIPTOR>
+constexpr T norm_c(unsigned iPop)
+{
+  // Hacky but should hold until we implemented a solution for abstracting T in this setting
+  static_assert(
+      DESCRIPTOR::d == 3 && DESCRIPTOR::q == 27 && DESCRIPTOR::template provides<tag::RTLBM>(),
+      "DESCRIPTOR is D3Q27 RTLBM"
+    );
+  return rtlbm_data::norm_c_3_27<T>[iPop];
+}
+
+}  // namespace descriptors
+
+}  // namespace olb
+
+#endif
-- 
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