ai_bridge.cpp
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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 BridgeID AIBridge::GetBridgeID(TileIndex tile)
00027 {
00028 if (!IsBridgeTile(tile)) return (BridgeID)-1;
00029 return (BridgeID)::GetBridgeType(tile);
00030 }
00031
00032 static void _DoCommandReturnBuildBridge2(class AIInstance *instance)
00033 {
00034 if (!AIBridge::_BuildBridgeRoad2()) {
00035 AIObject::SetLastCommandRes(false);
00036 AIInstance::DoCommandReturn(instance);
00037 return;
00038 }
00039
00040
00041
00042 NOT_REACHED();
00043 }
00044
00045 static void _DoCommandReturnBuildBridge1(class AIInstance *instance)
00046 {
00047 if (!AIBridge::_BuildBridgeRoad1()) {
00048 AIObject::SetLastCommandRes(false);
00049 AIInstance::DoCommandReturn(instance);
00050 return;
00051 }
00052
00053
00054
00055 NOT_REACHED();
00056 }
00057
00058 bool AIBridge::BuildBridge(AIVehicle::VehicleType vehicle_type, BridgeID bridge_id, TileIndex start, TileIndex end)
00059 {
00060 EnforcePrecondition(false, start != end);
00061 EnforcePrecondition(false, ::IsValidTile(start) && ::IsValidTile(end));
00062 EnforcePrecondition(false, TileX(start) == TileX(end) || TileY(start) == TileY(end));
00063 EnforcePrecondition(false, vehicle_type == AIVehicle::VT_ROAD || vehicle_type == AIVehicle::VT_RAIL || vehicle_type == AIVehicle::VT_WATER);
00064 EnforcePrecondition(false, vehicle_type != AIVehicle::VT_RAIL || AIRail::IsRailTypeAvailable(AIRail::GetCurrentRailType()));
00065
00066 uint type = 0;
00067 switch (vehicle_type) {
00068 case AIVehicle::VT_ROAD:
00069 type |= (TRANSPORT_ROAD << 15);
00070 type |= (RoadTypeToRoadTypes((::RoadType)AIObject::GetRoadType()) << 8);
00071 break;
00072 case AIVehicle::VT_RAIL:
00073 type |= (TRANSPORT_RAIL << 15);
00074 type |= (AIRail::GetCurrentRailType() << 8);
00075 break;
00076 case AIVehicle::VT_WATER:
00077 type |= (TRANSPORT_WATER << 15);
00078 break;
00079 default: NOT_REACHED();
00080 }
00081
00082
00083 if (vehicle_type == AIVehicle::VT_RAIL || vehicle_type == AIVehicle::VT_WATER) {
00084 return AIObject::DoCommand(end, start, type | bridge_id, CMD_BUILD_BRIDGE);
00085 }
00086
00087 AIObject::SetCallbackVariable(0, start);
00088 AIObject::SetCallbackVariable(1, end);
00089 if (!AIObject::DoCommand(end, start, type | bridge_id, CMD_BUILD_BRIDGE, NULL, &_DoCommandReturnBuildBridge1)) return false;
00090
00091
00092 return _BuildBridgeRoad1();
00093 }
00094
00095 bool AIBridge::_BuildBridgeRoad1()
00096 {
00097
00098 TileIndex end = AIObject::GetCallbackVariable(0);
00099 TileIndex start = AIObject::GetCallbackVariable(1);
00100
00101 DiagDirection dir_1 = (DiagDirection)((::TileX(start) == ::TileX(end)) ? (::TileY(start) < ::TileY(end) ? DIAGDIR_NW : DIAGDIR_SE) : (::TileX(start) < ::TileX(end) ? DIAGDIR_NE : DIAGDIR_SW));
00102 DiagDirection dir_2 = ::ReverseDiagDir(dir_1);
00103
00104 if (!AIObject::DoCommand(start + ::TileOffsByDiagDir(dir_1), ::DiagDirToRoadBits(dir_2) | (AIObject::GetRoadType() << 4), 0, CMD_BUILD_ROAD, NULL, &_DoCommandReturnBuildBridge2)) return false;
00105
00106
00107 return _BuildBridgeRoad2();
00108 }
00109
00110 bool AIBridge::_BuildBridgeRoad2()
00111 {
00112
00113 TileIndex end = AIObject::GetCallbackVariable(0);
00114 TileIndex start = AIObject::GetCallbackVariable(1);
00115
00116 DiagDirection dir_1 = (DiagDirection)((::TileX(start) == ::TileX(end)) ? (::TileY(start) < ::TileY(end) ? DIAGDIR_NW : DIAGDIR_SE) : (::TileX(start) < ::TileX(end) ? DIAGDIR_NE : DIAGDIR_SW));
00117 DiagDirection dir_2 = ::ReverseDiagDir(dir_1);
00118
00119 return AIObject::DoCommand(end + ::TileOffsByDiagDir(dir_2), ::DiagDirToRoadBits(dir_1) | (AIObject::GetRoadType() << 4), 0, CMD_BUILD_ROAD);
00120 }
00121
00122 bool AIBridge::RemoveBridge(TileIndex tile)
00123 {
00124 EnforcePrecondition(false, IsBridgeTile(tile));
00125 return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
00126 }
00127
00128 char *AIBridge::GetName(BridgeID bridge_id)
00129 {
00130 if (!IsValidBridge(bridge_id)) return NULL;
00131
00132 static const int len = 64;
00133 char *bridge_name = MallocT<char>(len);
00134
00135 ::GetString(bridge_name, ::GetBridgeSpec(bridge_id)->transport_name[0], &bridge_name[len - 1]);
00136 return bridge_name;
00137 }
00138
00139 int32 AIBridge::GetMaxSpeed(BridgeID bridge_id)
00140 {
00141 if (!IsValidBridge(bridge_id)) return -1;
00142
00143 return ::GetBridgeSpec(bridge_id)->speed;
00144 }
00145
00146 Money AIBridge::GetPrice(BridgeID bridge_id, uint length)
00147 {
00148 if (!IsValidBridge(bridge_id)) return -1;
00149
00150 return length * _price.build_bridge * ::GetBridgeSpec(bridge_id)->price >> 8;
00151 }
00152
00153 int32 AIBridge::GetMaxLength(BridgeID bridge_id)
00154 {
00155 if (!IsValidBridge(bridge_id)) return -1;
00156
00157 uint max = ::GetBridgeSpec(bridge_id)->max_length;
00158 if (max >= 16 && _settings_game.construction.longbridges) max = 100;
00159 return max + 2;
00160 }
00161
00162 int32 AIBridge::GetMinLength(BridgeID bridge_id)
00163 {
00164 if (!IsValidBridge(bridge_id)) return -1;
00165
00166 return ::GetBridgeSpec(bridge_id)->min_length + 2;
00167 }
00168
00169 TileIndex AIBridge::GetOtherBridgeEnd(TileIndex tile)
00170 {
00171 if (!::IsValidTile(tile)) return INVALID_TILE;
00172 if (!IsBridgeTile(tile)) return INVALID_TILE;
00173
00174 return ::GetOtherBridgeEnd(tile);
00175 }