ai_base.cpp

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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 #include "../../stdafx.h"
00013 #include "ai_base.hpp"
00014 #include "../../network/network.h"
00015 #include "../../core/random_func.hpp"
00016 
00017 /* static */ uint32 AIBase::Rand()
00018 {
00019   /* We pick RandomRange if we are in SP (so when saved, we do the same over and over)
00020    *   but we pick InteractiveRandomRange if we are a network_server or network-client. */
00021   if (_networking) return ::InteractiveRandom();
00022   return ::Random();
00023 }
00024 
00025 /* static */ uint32 AIBase::RandItem(int unused_param)
00026 {
00027   return AIBase::Rand();
00028 }
00029 
00030 /* static */ uint AIBase::RandRange(uint max)
00031 {
00032   /* We pick RandomRange if we are in SP (so when saved, we do the same over and over)
00033    *   but we pick InteractiveRandomRange if we are a network_server or network-client. */
00034   if (_networking) return ::InteractiveRandomRange(max);
00035   return ::RandomRange(max);
00036 }
00037 
00038 /* static */ uint32 AIBase::RandRangeItem(int unused_param, uint max)
00039 {
00040   return AIBase::RandRange(max);
00041 }
00042 
00043 /* static */ bool AIBase::Chance(uint out, uint max)
00044 {
00045   return (uint16)Rand() <= (uint16)((65536 * out) / max);
00046 }
00047 
00048 /* static */ bool AIBase::ChanceItem(int unused_param, uint out, uint max)
00049 {
00050   return AIBase::Chance(out, max);
00051 }

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