made thresholds changeable

src/pe/Thresholds.cpp

+//======================================================================================================================
+//
+//  This file is part of waLBerla. waLBerla 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 3 of
+//  the License, or (at your option) any later version.
+//
+//  waLBerla 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 waLBerla (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
+//
+//! \file Thresholds.cpp
+//! \author Klaus Iglberger
+//! \author Sebastian Eibl <sebastian.eibl@fau.de>
+//! \brief Numerical thresholds for the physics engine
+//
+//======================================================================================================================
+
+#include "Thresholds.h"
+
+namespace walberla {
+namespace pe {
+
+//=================================================================================================
+//
+//  GLOBAL THRESHOLD VALUES
+//
+//=================================================================================================
+
+//*************************************************************************************************
+//! Threshold for the contact classification.
+/*! This threshold separates between separating, resting and colliding contacts. */
+real_t collisionThreshold = Thresholds<real_t>::collisionThreshold();
+//*************************************************************************************************
+
+
+//*************************************************************************************************
+//! Threshold for the distance between two rigid bodies.
+/*! Rigid bodies with a distance smaller than this threshold are in contact. */
+real_t contactThreshold = Thresholds<real_t>::contactThreshold();
+//*************************************************************************************************
+
+
+//*************************************************************************************************
+//! Threshold for the restriction of the coefficient of restitution.
+/*! In case the relative velocity between two colliding rigid bodies is smaller than this
+    threshold, a coefficient of restitution of 0 is used to avoid an infinite number of
+    collisions during a single time step. */
+real_t restitutionThreshold = Thresholds<real_t>::restitutionThreshold();
+//*************************************************************************************************
+
+
+//*************************************************************************************************
+//! Threshold for the separation between static and dynamic friction.
+/*! This threshold represents the boundary between static and dynamic friction. */
+real_t frictionThreshold = Thresholds<real_t>::frictionThreshold();
+//*************************************************************************************************
+
+
+//*************************************************************************************************
+//! Threshold for surface points/checks.
+/*! Only points with a distance to the surface smaller than this threshold are considered
+    surface point. */
+real_t surfaceThreshold = Thresholds<real_t>::surfaceThreshold();
+//*************************************************************************************************
+
+} // namespace pe
+}  // namespace walberla

src/pe/Thresholds.h

@@ -13,7 +13,7 @@
 //  You should have received a copy of the GNU General Public License along
 //  with waLBerla (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
 //
-//! \file Types.h
+//! \file Thresholds.h
 //! \author Klaus Iglberger
 //! \author Sebastian Eibl <sebastian.eibl@fau.de>
 //! \brief Numerical thresholds for the physics engine
@@ -219,23 +219,17 @@ public:
 //
 //=================================================================================================
 
-// Disable false warnings in GCC 5
-#if ( defined __GNUC__ ) && ( __GNUC__ >= 5 )
-#  pragma GCC diagnostic push
-#  pragma GCC diagnostic ignored "-Wunused-variable"
-#endif
-
 //*************************************************************************************************
 //! Threshold for the contact classification.
 /*! This threshold separates between separating, resting and colliding contacts. */
-const real_t collisionThreshold = Thresholds<real_t>::collisionThreshold();
+extern real_t collisionThreshold;
 //*************************************************************************************************
 
 
 //*************************************************************************************************
 //! Threshold for the distance between two rigid bodies.
 /*! Rigid bodies with a distance smaller than this threshold are in contact. */
-const real_t contactThreshold = Thresholds<real_t>::contactThreshold();
+extern real_t contactThreshold;
 //*************************************************************************************************
 
 
@@ -244,14 +238,14 @@ const real_t contactThreshold = Thresholds<real_t>::contactThreshold();
 /*! In case the relative velocity between two colliding rigid bodies is smaller than this
     threshold, a coefficient of restitution of 0 is used to avoid an infinite number of
     collisions during a single time step. */
-const real_t restitutionThreshold = Thresholds<real_t>::restitutionThreshold();
+extern real_t restitutionThreshold;
 //*************************************************************************************************
 
 
 //*************************************************************************************************
 //! Threshold for the separation between static and dynamic friction.
 /*! This threshold represents the boundary between static and dynamic friction. */
-const real_t frictionThreshold = Thresholds<real_t>::frictionThreshold();
+extern real_t frictionThreshold;
 //*************************************************************************************************
 
 
@@ -259,7 +253,7 @@ const real_t frictionThreshold = Thresholds<real_t>::frictionThreshold();
 //! Threshold for surface points/checks.
 /*! Only points with a distance to the surface smaller than this threshold are considered
     surface point. */
-const real_t surfaceThreshold = Thresholds<real_t>::surfaceThreshold();
+extern real_t surfaceThreshold;
 //*************************************************************************************************