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diff --git a/src/functors/analytical/indicator/indicatorBaseF3D.h b/src/functors/analytical/indicator/indicatorBaseF3D.h
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+/*  This file is part of the OpenLB library
+ *
+ *  Copyright (C) 2014-2016 Cyril Masquelier, Albert Mink, Mathias J. Krause, Benjamin Förster
+ *  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 INDICATOR_BASE_F_3D_H
+#define INDICATOR_BASE_F_3D_H
+
+#include <vector>
+
+#include "core/vector.h"
+#include "functors/genericF.h"
+
+namespace olb {
+
+
+/** IndicatorF3D is an application from \f$ \Omega \subset R^3 \to \{0,1\} \f$.
+  * \param _myMin   holds minimal(component wise) vector of the domain \f$ \Omega \f$.
+  * \param _myMax   holds maximal(component wise) vector of the domain \f$ \Omega \f$.
+  */
+template <typename S>
+class IndicatorF3D : public GenericF<bool,S> {
+protected:
+  IndicatorF3D();
+  Vector<S,3> _myMin;
+  Vector<S,3> _myMax;
+public:
+  virtual Vector<S,3>& getMin();
+  virtual Vector<S,3>& getMax();
+  /** \returns false or true and pos. distance if there was one found for a given origin and direction.
+   * Mind that the default computation is done by a numerical approximation which searches .. [TODO: CYRIL]
+   */
+  virtual bool distance(S& distance, const Vector<S,3>& origin, const Vector<S,3>& direction, int iC=-1);
+  virtual bool distance(S& distance, const Vector<S,3>& origin);
+  /// returns true and the normal if there was one found for an given origin and direction
+  /**
+   * (mind that the default computation is done by a numerical approximation which searches .. [TODO])
+   */
+  virtual bool normal(Vector<S,3>& normal, const Vector<S,3>& origin, const Vector<S,3>& direction, int iC=-1);
+  ///Rotate vector around axis by angle theta
+  virtual bool rotOnAxis(Vector<S,3>& vec_rot, const Vector<S,3>& vec, const Vector<S,3>& axis, S& theta);
+  /// Returns true if `point` is inside a cube with corners `_myMin` and `_myMax`
+  bool isInsideBox(Vector<S,3> point);
+};
+
+
+template <typename S>
+class IndicatorIdentity3D : public IndicatorF3D<S> {
+public:
+  std::shared_ptr<IndicatorF3D<S>> _f;
+
+  IndicatorIdentity3D(std::shared_ptr<IndicatorF3D<S>> f);
+  bool operator() (bool output[1], const S input[3]) override;
+};
+
+
+}
+
+#endif