ai_bridge.cpp
Go to the documentation of this file.00001
00002
00005 #include "ai_bridge.hpp"
00006 #include "ai_rail.hpp"
00007 #include "../ai_instance.hpp"
00008 #include "../../bridge_map.h"
00009 #include "../../strings_func.h"
00010 #include "../../core/alloc_func.hpp"
00011 #include "../../economy_func.h"
00012 #include "../../settings_type.h"
00013 #include "../../date_func.h"
00014
00015 bool AIBridge::IsValidBridge(BridgeID bridge_id)
00016 {
00017 return bridge_id < MAX_BRIDGES && ::GetBridgeSpec(bridge_id)->avail_year <= _cur_year;
00018 }
00019
00020 bool AIBridge::IsBridgeTile(TileIndex tile)
00021 {
00022 if (!::IsValidTile(tile)) return false;
00023 return ::IsBridgeTile(tile);
00024 }
00025
00026 static void _DoCommandReturnBuildBridge2(class AIInstance *instance)
00027 {
00028 if (!AIBridge::_BuildBridgeRoad2()) {
00029 AIObject::SetLastCommandRes(false);
00030 AIInstance::DoCommandReturn(instance);
00031 return;
00032 }
00033
00034
00035
00036 NOT_REACHED();
00037 }
00038
00039 static void _DoCommandReturnBuildBridge1(class AIInstance *instance)
00040 {
00041 if (!AIBridge::_BuildBridgeRoad1()) {
00042 AIObject::SetLastCommandRes(false);
00043 AIInstance::DoCommandReturn(instance);
00044 return;
00045 }
00046
00047
00048
00049 NOT_REACHED();
00050 }
00051
00052 bool AIBridge::BuildBridge(AIVehicle::VehicleType vehicle_type, BridgeID bridge_id, TileIndex start, TileIndex end)
00053 {
00054 EnforcePrecondition(false, start != end);
00055 EnforcePrecondition(false, ::IsValidTile(start) && ::IsValidTile(end));
00056 EnforcePrecondition(false, TileX(start) == TileX(end) || TileY(start) == TileY(end));
00057 EnforcePrecondition(false, vehicle_type == AIVehicle::VT_ROAD || vehicle_type == AIVehicle::VT_RAIL || vehicle_type == AIVehicle::VT_WATER);
00058 EnforcePrecondition(false, vehicle_type != AIVehicle::VT_RAIL || AIRail::IsRailTypeAvailable(AIRail::GetCurrentRailType()));
00059
00060 uint type = 0;
00061 switch (vehicle_type) {
00062 case AIVehicle::VT_ROAD:
00063 type |= (TRANSPORT_ROAD << 15);
00064 type |= (RoadTypeToRoadTypes((::RoadType)AIObject::GetRoadType()) << 8);
00065 break;
00066 case AIVehicle::VT_RAIL:
00067 type |= (TRANSPORT_RAIL << 15);
00068 type |= (AIRail::GetCurrentRailType() << 8);
00069 break;
00070 case AIVehicle::VT_WATER:
00071 type |= (TRANSPORT_WATER << 15);
00072 break;
00073 default: NOT_REACHED();
00074 }
00075
00076
00077 if (vehicle_type == AIVehicle::VT_RAIL || vehicle_type == AIVehicle::VT_WATER) {
00078 return AIObject::DoCommand(end, start, type | bridge_id, CMD_BUILD_BRIDGE);
00079 }
00080
00081 AIObject::SetCallbackVariable(0, start);
00082 AIObject::SetCallbackVariable(1, end);
00083 if (!AIObject::DoCommand(end, start, type | bridge_id, CMD_BUILD_BRIDGE, NULL, &_DoCommandReturnBuildBridge1)) return false;
00084
00085
00086 return _BuildBridgeRoad1();
00087 }
00088
00089 bool AIBridge::_BuildBridgeRoad1()
00090 {
00091
00092 TileIndex end = AIObject::GetCallbackVariable(0);
00093 TileIndex start = AIObject::GetCallbackVariable(1);
00094
00095 DiagDirection dir_1 = (DiagDirection)((::TileX(start) == ::TileX(end)) ? (::TileY(start) < ::TileY(end) ? DIAGDIR_NW : DIAGDIR_SE) : (::TileX(start) < ::TileX(end) ? DIAGDIR_NE : DIAGDIR_SW));
00096 DiagDirection dir_2 = ::ReverseDiagDir(dir_1);
00097
00098 if (!AIObject::DoCommand(start + ::TileOffsByDiagDir(dir_1), ::DiagDirToRoadBits(dir_2) | (AIObject::GetRoadType() << 4), 0, CMD_BUILD_ROAD, NULL, &_DoCommandReturnBuildBridge2)) return false;
00099
00100
00101 return _BuildBridgeRoad2();
00102 }
00103
00104 bool AIBridge::_BuildBridgeRoad2()
00105 {
00106
00107 TileIndex end = AIObject::GetCallbackVariable(0);
00108 TileIndex start = AIObject::GetCallbackVariable(1);
00109
00110 DiagDirection dir_1 = (DiagDirection)((::TileX(start) == ::TileX(end)) ? (::TileY(start) < ::TileY(end) ? DIAGDIR_NW : DIAGDIR_SE) : (::TileX(start) < ::TileX(end) ? DIAGDIR_NE : DIAGDIR_SW));
00111 DiagDirection dir_2 = ::ReverseDiagDir(dir_1);
00112
00113 return AIObject::DoCommand(end + ::TileOffsByDiagDir(dir_2), ::DiagDirToRoadBits(dir_1) | (AIObject::GetRoadType() << 4), 0, CMD_BUILD_ROAD);
00114 }
00115
00116 bool AIBridge::RemoveBridge(TileIndex tile)
00117 {
00118 EnforcePrecondition(false, IsBridgeTile(tile));
00119 return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00120 }
00121
00122 char *AIBridge::GetName(BridgeID bridge_id)
00123 {
00124 if (!IsValidBridge(bridge_id)) return NULL;
00125
00126 static const int len = 64;
00127 char *bridge_name = MallocT<char>(len);
00128
00129 ::GetString(bridge_name, ::GetBridgeSpec(bridge_id)->transport_name[0], &bridge_name[len - 1]);
00130 return bridge_name;
00131 }
00132
00133 int32 AIBridge::GetMaxSpeed(BridgeID bridge_id)
00134 {
00135 if (!IsValidBridge(bridge_id)) return -1;
00136
00137 return ::GetBridgeSpec(bridge_id)->speed;
00138 }
00139
00140 Money AIBridge::GetPrice(BridgeID bridge_id, uint length)
00141 {
00142 if (!IsValidBridge(bridge_id)) return -1;
00143
00144 return length * _price.build_bridge * ::GetBridgeSpec(bridge_id)->price >> 8;
00145 }
00146
00147 int32 AIBridge::GetMaxLength(BridgeID bridge_id)
00148 {
00149 if (!IsValidBridge(bridge_id)) return -1;
00150
00151 uint max = ::GetBridgeSpec(bridge_id)->max_length;
00152 if (max >= 16 && _settings_game.construction.longbridges) max = 100;
00153 return max + 2;
00154 }
00155
00156 int32 AIBridge::GetMinLength(BridgeID bridge_id)
00157 {
00158 if (!IsValidBridge(bridge_id)) return -1;
00159
00160 return ::GetBridgeSpec(bridge_id)->min_length + 2;
00161 }
00162
00163 TileIndex AIBridge::GetOtherBridgeEnd(TileIndex tile)
00164 {
00165 if (!::IsValidTile(tile)) return INVALID_TILE;
00166 if (!IsBridgeTile(tile)) return INVALID_TILE;
00167
00168 return ::GetOtherBridgeEnd(tile);
00169 }