mirror of https://github.com/OpenTTD/OpenTTD.git
116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
/* $Id$ */
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/** @file ai_tunnel.cpp Implementation of AITunnel. */
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#include "ai_tunnel.hpp"
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#include "ai_rail.hpp"
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#include "../ai_instance.hpp"
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#include "../../tunnel_map.h"
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#include "../../command_func.h"
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#include "../../tunnelbridge.h"
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#include "../../road_func.h"
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/* static */ bool AITunnel::IsTunnelTile(TileIndex tile)
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{
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if (!::IsValidTile(tile)) return false;
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return ::IsTunnelTile(tile);
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}
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/* static */ TileIndex AITunnel::GetOtherTunnelEnd(TileIndex tile)
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{
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if (!::IsValidTile(tile)) return INVALID_TILE;
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/* If it's a tunnel alread, take the easy way out! */
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if (IsTunnelTile(tile)) return ::GetOtherTunnelEnd(tile);
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::DoCommand(tile, 0, 0, DC_AUTO, CMD_BUILD_TUNNEL);
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return _build_tunnel_endtile == 0 ? INVALID_TILE : _build_tunnel_endtile;
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}
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static void _DoCommandReturnBuildTunnel2(class AIInstance *instance)
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{
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if (!AITunnel::_BuildTunnelRoad2()) {
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AIObject::SetLastCommandRes(false);
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AIInstance::DoCommandReturn(instance);
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return;
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}
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/* This can never happen, as in test-mode this callback is never executed,
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* and in execute-mode, the other callback is called. */
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NOT_REACHED();
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}
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static void _DoCommandReturnBuildTunnel1(class AIInstance *instance)
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{
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if (!AITunnel::_BuildTunnelRoad1()) {
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AIObject::SetLastCommandRes(false);
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AIInstance::DoCommandReturn(instance);
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return;
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}
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/* This can never happen, as in test-mode this callback is never executed,
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* and in execute-mode, the other callback is called. */
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NOT_REACHED();
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}
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/* static */ bool AITunnel::BuildTunnel(AIVehicle::VehicleType vehicle_type, TileIndex start)
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{
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EnforcePrecondition(false, ::IsValidTile(start));
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EnforcePrecondition(false, vehicle_type == AIVehicle::VT_RAIL || vehicle_type == AIVehicle::VT_ROAD);
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EnforcePrecondition(false, vehicle_type != AIVehicle::VT_RAIL || AIRail::IsRailTypeAvailable(AIRail::GetCurrentRailType()));
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uint type = 0;
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if (vehicle_type == AIVehicle::VT_ROAD) {
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type |= (TRANSPORT_ROAD << 9);
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type |= RoadTypeToRoadTypes((::RoadType)AIObject::GetRoadType());
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} else {
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type |= (TRANSPORT_RAIL << 9);
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type |= AIRail::GetCurrentRailType();
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}
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/* For rail we do nothing special */
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if (vehicle_type == AIVehicle::VT_RAIL) {
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return AIObject::DoCommand(start, type, 0, CMD_BUILD_TUNNEL);
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}
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AIObject::SetCallbackVariable(0, start);
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if (!AIObject::DoCommand(start, type, 0, CMD_BUILD_TUNNEL, NULL, &_DoCommandReturnBuildTunnel1)) return false;
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/* In case of test-mode, test if we can build both road pieces */
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return _BuildTunnelRoad1();
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}
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/* static */ bool AITunnel::_BuildTunnelRoad1()
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{
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/* Build the piece of road on the 'start' side of the tunnel */
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TileIndex end = AIObject::GetCallbackVariable(0);
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TileIndex start = AITunnel::GetOtherTunnelEnd(end);
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DiagDirection dir_1 = ::DiagdirBetweenTiles(end, start);
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DiagDirection dir_2 = ::ReverseDiagDir(dir_1);
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if (!AIObject::DoCommand(start + ::TileOffsByDiagDir(dir_1), ::DiagDirToRoadBits(dir_2) | (AIObject::GetRoadType() << 4), 0, CMD_BUILD_ROAD, NULL, &_DoCommandReturnBuildTunnel2)) return false;
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/* In case of test-mode, test the other road piece too */
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return _BuildTunnelRoad2();
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}
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/* static */ bool AITunnel::_BuildTunnelRoad2()
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{
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/* Build the piece of road on the 'end' side of the tunnel */
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TileIndex end = AIObject::GetCallbackVariable(0);
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TileIndex start = AITunnel::GetOtherTunnelEnd(end);
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DiagDirection dir_1 = ::DiagdirBetweenTiles(end, start);
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DiagDirection dir_2 = ::ReverseDiagDir(dir_1);
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return AIObject::DoCommand(end + ::TileOffsByDiagDir(dir_2), ::DiagDirToRoadBits(dir_1) | (AIObject::GetRoadType() << 4), 0, CMD_BUILD_ROAD);
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}
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/* static */ bool AITunnel::RemoveTunnel(TileIndex tile)
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{
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EnforcePrecondition(false, IsTunnelTile(tile));
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return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
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}
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