RC

git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@2710 331e1502-861f-0410-8da2-ba01fb791d7f

branches/rc2.0/eo/src/eoStandardFlight.h

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+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// eoStandardFlight.h
+// (c) OPAC 2007
+/*
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Contact: thomas.legrand@lifl.fr
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef EOSTANDARDFLIGHT_H
+#define EOSTANDARDFLIGHT_H
+
+//-----------------------------------------------------------------------------
+#include <eoFlight.h>
+//-----------------------------------------------------------------------------
+
+
+
+/** Standard flight for particle swarm optimization. Derivated from abstract eoFlight,
+ *   just adds the velocities to the current position of the particle
+ *   and invalidates its fitness
+ *
+ *   @ingroup Variators
+ */
+template < class POT > class eoStandardFlight:public eoFlight < POT >
+{
+
+public:
+
+    /*
+        * Each element for the postion evaluation is expected to be of type PositionType.
+        */
+    typedef typename POT::AtomType PositionType;
+
+
+    /** Constructor without bounds.
+     *
+     */
+    eoStandardFlight ():bnds (*(new eoRealVectorNoBounds(0))){}
+
+
+    /** Constructor for continuous flight with real bounds: expects a eoRealVectorBounds object for bound
+     *   control.
+     * @param _bounds - An eoRealVectorBounds
+     */
+    eoStandardFlight (eoRealVectorBounds & _bounds):bnds (_bounds){}
+
+
+    /** Constructor for continuous flight with real bounds: expects a min and a
+     *  max to build the same real bounds for all the positions.
+     *  WARNING: _min and max MUST be double as the position type
+     * @param _dim - The dimension of the bounds = the dimension of the position
+     * @param _min - The lower bound to use for all the positions
+     * @param _max - The upper bound to use for all the positions
+     */
+    eoStandardFlight (const unsigned _dim,const double & _min,const double & _max ):bnds (*(new eoRealVectorBounds(_dim,_min,_max))){}
+
+
+    /**
+     * Apply the standard flight to a particle : position:=position + velocity
+     *  and ... invalidates the particle's fitness
+     */
+    void operator  () (POT & _po)
+    {
+        // need to resize the bounds even if there are dummy because of "isBounded" call
+        bnds.adjust_size(_po.size());
+
+        for (unsigned j = 0; j < _po.size (); j++)
+        {
+            PositionType newPosition;
+
+            // tmp position
+            newPosition = _po[j] + _po.velocities[j];
+
+            /* check bounds */
+            if (bnds.isMinBounded(j))
+                newPosition=std::max(newPosition,bnds.minimum(j));
+            if (bnds.isMaxBounded(j))
+                newPosition=std::min(newPosition,bnds.maximum(j));
+
+            _po[j]=newPosition;
+        }
+        // invalidate the fitness because the positions have changed
+        _po.invalidate();
+    }
+
+protected:
+    eoRealVectorBounds & bnds;
+};
+
+
+
+
+#endif /*EOSTANDARDFLIGHT_H */