moving_average.h

Go to the documentation of this file.
00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD 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, version 2.
00006  * OpenTTD 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.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #ifndef MOVING_AVERAGE_H_
00013 #define MOVING_AVERAGE_H_
00014 
00015 #include "settings_type.h"
00016 #include "core/math_func.hpp"
00017 
00025 template<class Tvalue>
00026 class MovingAverage {
00027 protected:
00028   uint length;
00029 
00030 public:
00035   FORCEINLINE MovingAverage(uint length) : length(length)
00036   {
00037     assert(this->length > 0);
00038   }
00039 
00044   FORCEINLINE uint Length() const
00045   {
00046     return this->length;
00047   }
00048 
00059   FORCEINLINE Tvalue Monthly(const Tvalue &value) const
00060   {
00061     return (value * 30) / (this->length);
00062   }
00063 
00069   FORCEINLINE Tvalue &Decrease(Tvalue &value) const
00070   {
00071     return value = (value * this->length) / (this->length + 1);
00072   }
00073 };
00074 
00075 template<class Titem> void RunAverages();
00076 
00077 #endif /* MOVING_AVERAGE_H_ */
00078 

Generated on Fri May 27 04:19:43 2011 for OpenTTD by  doxygen 1.6.1