00001 /* $Id: ai_base.cpp 17248 2009-08-21 20:21:05Z rubidium $ */ 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 "ai_base.hpp" 00013 #include "../../network/network.h" 00014 #include "../../core/random_func.hpp" 00015 00016 /* static */ uint32 AIBase::Rand() 00017 { 00018 /* We pick RandomRange if we are in SP (so when saved, we do the same over and over) 00019 * but we pick InteractiveRandomRange if we are a network_server or network-client. */ 00020 if (_networking) return ::InteractiveRandom(); 00021 return ::Random(); 00022 } 00023 00024 /* static */ uint32 AIBase::RandItem(int unused_param) 00025 { 00026 return AIBase::Rand(); 00027 } 00028 00029 /* static */ uint AIBase::RandRange(uint max) 00030 { 00031 /* We pick RandomRange if we are in SP (so when saved, we do the same over and over) 00032 * but we pick InteractiveRandomRange if we are a network_server or network-client. */ 00033 if (_networking) return ::InteractiveRandomRange(max); 00034 return ::RandomRange(max); 00035 } 00036 00037 /* static */ uint32 AIBase::RandRangeItem(int unused_param, uint max) 00038 { 00039 return AIBase::RandRange(max); 00040 } 00041 00042 /* static */ bool AIBase::Chance(uint out, uint max) 00043 { 00044 return (uint16)Rand() <= (uint16)((65536 * out) / max); 00045 } 00046 00047 /* static */ bool AIBase::ChanceItem(int unused_param, uint out, uint max) 00048 { 00049 return AIBase::Chance(out, max); 00050 }