mirror of https://github.com/OpenTTD/OpenTTD.git
131 lines
4.9 KiB
C++
131 lines
4.9 KiB
C++
/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file script_tunnel.cpp Implementation of ScriptTunnel. */
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#include "../../stdafx.h"
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#include "script_tunnel.hpp"
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#include "script_rail.hpp"
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#include "../script_instance.hpp"
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#include "../../tunnel_map.h"
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#include "../../landscape_cmd.h"
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#include "../../road_cmd.h"
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#include "../../tunnelbridge_cmd.h"
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#include "../../safeguards.h"
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/* static */ bool ScriptTunnel::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 ScriptTunnel::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 already, take the easy way out! */
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if (IsTunnelTile(tile)) return ::GetOtherTunnelEnd(tile);
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int start_z;
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Slope start_tileh = ::GetTileSlope(tile, &start_z);
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DiagDirection direction = ::GetInclinedSlopeDirection(start_tileh);
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if (direction == INVALID_DIAGDIR) return INVALID_TILE;
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TileIndexDiff delta = ::TileOffsByDiagDir(direction);
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int end_z;
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do {
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tile += delta;
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if (!::IsValidTile(tile)) return INVALID_TILE;
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::GetTileSlope(tile, &end_z);
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} while (start_z != end_z);
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return tile;
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}
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/**
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* Helper function to connect a just built tunnel to nearby roads.
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* @param instance The script instance we have to built the road for.
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*/
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static void _DoCommandReturnBuildTunnel2(class ScriptInstance *instance)
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{
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if (!ScriptTunnel::_BuildTunnelRoad2()) {
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ScriptInstance::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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/**
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* Helper function to connect a just built tunnel to nearby roads.
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* @param instance The script instance we have to built the road for.
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*/
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static void _DoCommandReturnBuildTunnel1(class ScriptInstance *instance)
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{
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if (!ScriptTunnel::_BuildTunnelRoad1()) {
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ScriptInstance::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 ScriptTunnel::BuildTunnel(ScriptVehicle::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 == ScriptVehicle::VT_RAIL || vehicle_type == ScriptVehicle::VT_ROAD);
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EnforcePrecondition(false, vehicle_type != ScriptVehicle::VT_RAIL || ScriptRail::IsRailTypeAvailable(ScriptRail::GetCurrentRailType()));
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EnforcePrecondition(false, vehicle_type != ScriptVehicle::VT_ROAD || ScriptRoad::IsRoadTypeAvailable(ScriptRoad::GetCurrentRoadType()));
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EnforcePrecondition(false, ScriptObject::GetCompany() != OWNER_DEITY || vehicle_type == ScriptVehicle::VT_ROAD);
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if (vehicle_type == ScriptVehicle::VT_RAIL) {
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/* For rail we do nothing special */
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return ScriptObject::Command<CMD_BUILD_TUNNEL>::Do(start, TRANSPORT_RAIL, ScriptRail::GetCurrentRailType());
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} else {
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ScriptObject::SetCallbackVariable(0, start);
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return ScriptObject::Command<CMD_BUILD_TUNNEL>::Do(&::_DoCommandReturnBuildTunnel1, start, TRANSPORT_ROAD, ScriptRoad::GetCurrentRoadType());
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}
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}
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/* static */ bool ScriptTunnel::_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 = ScriptObject::GetCallbackVariable(0);
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TileIndex start = ScriptTunnel::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 ScriptObject::Command<CMD_BUILD_ROAD>::Do(&::_DoCommandReturnBuildTunnel2, start + ::TileOffsByDiagDir(dir_1), ::DiagDirToRoadBits(dir_2), ScriptRoad::GetRoadType(), DRD_NONE, 0);
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}
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/* static */ bool ScriptTunnel::_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 = ScriptObject::GetCallbackVariable(0);
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TileIndex start = ScriptTunnel::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 ScriptObject::Command<CMD_BUILD_ROAD>::Do(end + ::TileOffsByDiagDir(dir_2), ::DiagDirToRoadBits(dir_1), ScriptRoad::GetRoadType(), DRD_NONE, 0);
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}
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/* static */ bool ScriptTunnel::RemoveTunnel(TileIndex tile)
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{
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EnforcePrecondition(false, ScriptObject::GetCompany() != OWNER_DEITY);
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EnforcePrecondition(false, IsTunnelTile(tile));
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return ScriptObject::Command<CMD_LANDSCAPE_CLEAR>::Do(tile, 0, 0, {});
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}
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