battle/Arena.cpp


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/////////////////////////////////////////////////////////////////////////////
// Name:        ai/AlphaBeta.cpp
// Purpose:     Alpha-Beta pruning MiniMax tree
// Author:      Ben Boeckel
// Modified by: Ben Boeckel
// Created:     Tue Oct 16 2007 09:09:44
// Copyright:   ©2007 Ben Boeckel and Nerdy Productions
// Licence:
//    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 3 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, see <http://www.gnu.org/licenses/>.
/////////////////////////////////////////////////////////////////////////////

#include "Arena.h"

long PokeGen::Arena::AlphaBeta(AIProfile ai, Arena arena, const unsigned depth, const long alpha, const long beta)
{
    long val;
    if (!depth)
        return ai.eval(Arena);
    while (CanSimulate())
    {
        val = -AlphaBeta(Arena.Simulate(), depth - 1, -beta, -alpha);
        if (beta <= val)
            return beta;
        if (alpha < val)
            alpha = val;
    }
    return alpha;
}