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/utilities/hyperplane2D.hh | 109 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 src/utilities/hyperplane2D.hh

(limited to 'src/utilities/hyperplane2D.hh')

diff --git a/src/utilities/hyperplane2D.hh b/src/utilities/hyperplane2D.hh
new file mode 100644
index 0000000..3684e7d
--- /dev/null
+++ b/src/utilities/hyperplane2D.hh
@@ -0,0 +1,109 @@
+/*  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_2D_HH
+#define HYPERPLANE_2D_HH
+
+#include "hyperplane2D.h"
+#include "core/olbDebug.h"
+
+namespace olb {
+
+
+template <typename T>
+Hyperplane2D<T>& Hyperplane2D<T>::originAt(const Vector<T,2>& o)
+{
+  origin[0] = o[0] - 2*std::numeric_limits<T>::epsilon()*fabs(o[0]);
+  origin[1] = o[1] - 2*std::numeric_limits<T>::epsilon()*fabs(o[1]);
+
+  return *this;
+}
+
+template <typename T>
+Hyperplane2D<T>& Hyperplane2D<T>::centeredIn(const Cuboid2D<T>& cuboid)
+{
+  const Vector<T,2>& cuboidOrigin = cuboid.getOrigin();
+  const Vector<int,2>& extend     = cuboid.getExtend();
+  const T deltaR = cuboid.getDeltaR();
+
+  origin[0] = (cuboidOrigin[0] + 0.5 * deltaR * extend[0]);
+  origin[1] = (cuboidOrigin[1] + 0.5 * deltaR * extend[1]);
+  origin[0] -= 2*std::numeric_limits<T>::epsilon()*fabs(origin[0]);
+  origin[1] -= 2*std::numeric_limits<T>::epsilon()*fabs(origin[1]);
+
+  return *this;
+}
+
+template <typename T>
+Hyperplane2D<T>& Hyperplane2D<T>::parallelTo(const Vector<T,2>& direction)
+{
+  u = direction;
+  normal = { u[1], -u[0] };
+  normal.normalize();
+
+  OLB_POSTCONDITION(util::nearZero(util::dotProduct2D(u,normal)));
+
+  return *this;
+}
+
+template <typename T>
+Hyperplane2D<T>& Hyperplane2D<T>::normalTo(const Vector<T,2>& n)
+{
+  normal = n;
+
+  if ( util::nearZero(normal[0]*normal[1]) ) {
+    if ( util::nearZero(normal[0]) ) {
+      u = {T(1), T()};
+    }
+    else if ( util::nearZero(normal[1]) ) {
+      u = {T(), T(1)};
+    }
+  }
+  else {
+    u = {normal[1], -normal[0]};
+  }
+
+  u.normalize();
+  normal.normalize();
+
+  OLB_POSTCONDITION(util::nearZero(util::dotProduct2D(u,normal)));
+
+  return *this;
+}
+
+template <typename T>
+bool Hyperplane2D<T>::isParallelToX() const
+{
+  return util::nearZero(util::dotProduct2D(normal, {1,0}));
+}
+
+template <typename T>
+bool Hyperplane2D<T>::isParallelToY() const
+{
+  return util::nearZero(util::dotProduct2D(normal, {0,1}));
+}
+
+
+}
+
+#endif
-- 
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