truebrain@9833: /* $Id$ */
truebrain@9833: 
truebrain@9833: /** @file ai_tunnel.cpp Implementation of AITunnel. */
truebrain@9794: 
truebrain@9794: #include "ai_tunnel.hpp"
truebrain@9807: #include "ai_map.hpp"
truebrain@9794: #include "../../landscape.h"
truebrain@9794: #include "../../tunnel_map.h"
truebrain@9794: #include "../../road_type.h"
truebrain@9807: #include "../../command_func.h"
rubidium@10249: #include "../../tunnelbridge.h"
truebrain@9794: 
truebrain@9794: /* static */ bool AITunnel::IsTunnelTile(TileIndex tile)
truebrain@9794: {
truebrain@9794: 	return ::IsTunnelTile(tile);
truebrain@9794: }
truebrain@9794: 
truebrain@9794: /* static */ TileIndex AITunnel::GetOtherTunnelEnd(TileIndex tile)
truebrain@9794: {
truebrain@9807: 	if (!::IsValidTile(tile)) return INVALID_TILE;
truebrain@9794: 
truebrain@9807: 	/* If it's a tunnel alread, take the easy way out! */
truebrain@9807: 	if (IsTunnelTile(tile)) return ::GetOtherTunnelEnd(tile);
truebrain@9807: 
truebrain@9807: 	::DoCommand(tile, 0, 0, DC_AUTO, CMD_BUILD_TUNNEL);
truebrain@9807: 	return _build_tunnel_endtile == 0 ? tile : _build_tunnel_endtile;
truebrain@9794: }
truebrain@9794: 
truebrain@9794: /* static */ bool AITunnel::BuildTunnel(AIVehicle::VehicleType vehicle_type, TileIndex start)
truebrain@9794: {
rubidium@10088: 	EnforcePrecondition(false, ::IsValidTile(start));
rubidium@10088: 	EnforcePrecondition(false, vehicle_type == AIVehicle::VEHICLE_RAIL || vehicle_type == AIVehicle::VEHICLE_ROAD);
truebrain@9794: 
truebrain@9794: 	uint type = 0;
truebrain@9794: 	if (vehicle_type == AIVehicle::VEHICLE_ROAD) {
truebrain@9794: 		type |= (TRANSPORT_ROAD << 9);
truebrain@9794: 		type |= ROADTYPES_ROAD;
truebrain@9794: 	} else {
truebrain@9794: 		type |= (TRANSPORT_RAIL << 9);
truebrain@9794: 		type |= RAILTYPES_RAIL;
truebrain@9794: 	}
truebrain@9794: 
truebrain@9794: 	return AIObject::DoCommand(start, type, 0, CMD_BUILD_TUNNEL);
truebrain@9794: }
truebrain@9794: 
truebrain@9794: /* static */ bool AITunnel::RemoveTunnel(TileIndex tile)
truebrain@9794: {
rubidium@10088: 	EnforcePrecondition(false, IsTunnelTile(tile));
truebrain@9794: 
truebrain@9794: 	return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
truebrain@9794: }