truebrain@9792: /* $Id$ */
truebrain@9792: 
truebrain@9833: /** @file ai_bridge.cpp Implementation of AIBridge. */
truebrain@9792: 
truebrain@9792: #include "ai_bridge.hpp"
truebrain@9792: #include "../../bridge.h"
truebrain@9793: #include "../../bridge_map.h"
truebrain@9792: #include "../../strings_func.h"
truebrain@9792: #include "../../core/alloc_func.hpp"
truebrain@9792: #include "../../economy_func.h"
truebrain@9792: #include "../../settings_type.h"
truebrain@9793: #include "../../road_map.h"
truebrain@9792: #include "table/strings.h"
truebrain@9792: 
truebrain@9792: /* static */ bool AIBridge::IsValidBridge(BridgeID bridge_id)
truebrain@9792: {
truebrain@9792: 	return bridge_id < MAX_BRIDGES;
truebrain@9792: }
truebrain@9792: 
truebrain@9793: /* static */ bool AIBridge::IsBridgeTile(TileIndex tile)
truebrain@9793: {
truebrain@9793: 	return ::IsBridgeTile(tile);
truebrain@9793: }
truebrain@9793: 
truebrain@9793: /* static */ bool AIBridge::BuildBridge(AIVehicle::VehicleType vehicle_type, BridgeID bridge_id, TileIndex start, TileIndex end)
truebrain@9793: {
rubidium@9868: 	EnforcePrecondition(false, start != end);
rubidium@9868: 	EnforcePrecondition(false, ::IsValidTile(start) && ::IsValidTile(end));
rubidium@9868: 	EnforcePrecondition(false, TileX(start) == TileX(end) || TileY(start) == TileY(end));
rubidium@9868: 	EnforcePrecondition(false, vehicle_type == AIVehicle::VEHICLE_ROAD || vehicle_type == AIVehicle::VEHICLE_RAIL);
truebrain@9793: 
truebrain@9793: 	uint type = 0;
truebrain@9793: 	if (vehicle_type == AIVehicle::VEHICLE_ROAD) {
truebrain@9793: 		type |= (TRANSPORT_ROAD << 15);
truebrain@9793: 		type |= (ROADTYPES_ROAD << 8);
truebrain@9793: 	} else {
truebrain@9793: 		type |= (TRANSPORT_RAIL << 15);
truebrain@9793: 		type |= (RAILTYPES_RAIL << 8);
truebrain@9793: 	}
truebrain@9793: 
truebrain@9793: 	return AIObject::DoCommand(end, start, type | bridge_id, CMD_BUILD_BRIDGE);
truebrain@9793: }
truebrain@9793: 
truebrain@9793: /* static */ bool AIBridge::RemoveBridge(TileIndex tile)
truebrain@9793: {
rubidium@9868: 	EnforcePrecondition(false, IsBridgeTile(tile));
truebrain@9793: 	return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
truebrain@9793: }
truebrain@9793: 
truebrain@9792: /* static */ char *AIBridge::GetName(BridgeID bridge_id)
truebrain@9792: {
truebrain@9792: 	if (!IsValidBridge(bridge_id)) return NULL;
truebrain@9792: 
truebrain@9792: 	static const int len = 64;
truebrain@9792: 	char *bridge_name = MallocT<char>(len);
truebrain@9792: 
truebrain@9792: 	::GetString(bridge_name, ::GetBridgeSpec(bridge_id)->transport_name[0], &bridge_name[len - 1]);
truebrain@9792: 	return bridge_name;
truebrain@9792: }
truebrain@9792: 
truebrain@10194: /* static */ int32 AIBridge::GetMaxSpeed(BridgeID bridge_id)
truebrain@9792: {
truebrain@10194: 	if (!IsValidBridge(bridge_id)) return -1;
truebrain@9792: 
truebrain@9792: 	return ::GetBridgeSpec(bridge_id)->speed;
truebrain@9792: }
truebrain@9792: 
rubidium@10196: /* static */ Money AIBridge::GetPrice(BridgeID bridge_id, uint length)
truebrain@9792: {
truebrain@10194: 	if (!IsValidBridge(bridge_id)) return -1;
truebrain@9792: 
truebrain@9792: 	return length * _price.build_bridge * ::GetBridgeSpec(bridge_id)->price >> 8;
truebrain@9792: }
truebrain@9792: 
truebrain@10194: /* static */ int32 AIBridge::GetMaxLength(BridgeID bridge_id)
truebrain@9792: {
truebrain@10194: 	if (!IsValidBridge(bridge_id)) return -1;
truebrain@9792: 
truebrain@9792: 	uint max = ::GetBridgeSpec(bridge_id)->max_length;
truebrain@9792: 	if (max >= 16 && _patches.longbridges) max = 100;
truebrain@9792: 	return max + 2;
truebrain@9792: }
truebrain@9792: 
truebrain@10194: /* static */ int32 AIBridge::GetMinLength(BridgeID bridge_id)
truebrain@9792: {
truebrain@10194: 	if (!IsValidBridge(bridge_id)) return -1;
truebrain@9792: 
truebrain@9792: 	return ::GetBridgeSpec(bridge_id)->min_length + 2;
truebrain@9792: }
truebrain@9792: 
truebrain@9792: /* static */ int32 AIBridge::GetYearAvailable(BridgeID bridge_id)
truebrain@9792: {
truebrain@10194: 	if (!IsValidBridge(bridge_id)) return -1;
truebrain@9792: 
truebrain@9792: 	return ::GetBridgeSpec(bridge_id)->avail_year;
truebrain@9792: }