tile_cmd.h

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/*
 * This file is part of OpenTTD.
 * 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.
 * 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.
 * 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 <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */

 
#ifndef TILE_CMD_H
#define TILE_CMD_H
 
#include "core/enum_type.hpp"
#include "core/geometry_type.hpp"
#include "command_type.h"
#include "road_type.h"
#include "vehicle_type.h"
#include "cargo_type.h"
#include "track_type.h"
#include "tile_map.h"
#include "timer/timer_game_calendar.h"

enum class VehicleEnterTileState : uint8_t {
  EnteredStation, 
  EnteredWormhole, 
  CannotEnter, 
};

using VehicleEnterTileStates = EnumBitSet<VehicleEnterTileState, uint8_t>;

struct TileInfo : Coord3D<int> {
  Slope tileh;    
  TileIndex tile; 
};

struct TileDesc {
  StringID str{}; 
  uint64_t dparam = 0; 
  std::array<Owner, 4> owner{}; 
  std::array<StringID, 4> owner_type{}; 
  TimerGameCalendar::Date build_date = CalendarTime::INVALID_DATE; 
  StringID station_class{}; 
  StringID station_name{}; 
  StringID airport_class{}; 
  StringID airport_name{}; 
  StringID airport_tile_name{}; 
  std::optional<std::string> grf = std::nullopt; 
  StringID railtype{}; 
  uint16_t rail_speed = 0; 
  StringID roadtype{}; 
  uint16_t road_speed = 0; 
  StringID tramtype{}; 
  uint16_t tram_speed = 0; 
  std::optional<bool> town_can_upgrade = std::nullopt; 
};

using DrawTileProc = void(TileInfo *ti);

using GetSlopePixelZProc = int(TileIndex tile, uint x, uint y, bool ground_vehicle);

using ClearTileProc = CommandCost(TileIndex tile, DoCommandFlags flags);

using AddAcceptedCargoProc = void(TileIndex tile, CargoArray &acceptance, CargoTypes &always_accepted);

using GetTileDescProc = void(TileIndex tile, TileDesc &td);

using GetTileTrackStatusProc = TrackStatus(TileIndex tile, TransportType mode, RoadTramType sub_mode, DiagDirection side);

using AddProducedCargoProc = void(TileIndex tile, CargoArray &produced);

using ClickTileProc = bool(TileIndex tile);

using AnimateTileProc = void(TileIndex tile);

using TileLoopProc = void(TileIndex tile);

using ChangeTileOwnerProc = void(TileIndex tile, Owner old_owner, Owner new_owner);

using VehicleEnterTileProc = VehicleEnterTileStates(Vehicle *v, TileIndex tile, int x, int y);

using GetFoundationProc = Foundation(TileIndex tile, Slope tileh);

using TerraformTileProc = CommandCost(TileIndex tile, DoCommandFlags flags, int z_new, Slope tileh_new);

using CheckBuildAboveProc = CommandCost(TileIndex tile, DoCommandFlags flags, Axis axis, int height);

struct TileTypeProcs {
  DrawTileProc *draw_tile_proc; 
  GetSlopePixelZProc *get_slope_pixel_z_proc; 
  ClearTileProc *clear_tile_proc; 
  AddAcceptedCargoProc *add_accepted_cargo_proc = nullptr; 
  GetTileDescProc *get_tile_desc_proc; 
  GetTileTrackStatusProc *get_tile_track_status_proc = [](TileIndex, TransportType, RoadTramType, DiagDirection) -> TrackStatus { return {}; }; 
  ClickTileProc *click_tile_proc = nullptr; 
  AnimateTileProc *animate_tile_proc = nullptr; 
  TileLoopProc *tile_loop_proc; 
  ChangeTileOwnerProc *change_tile_owner_proc = [](TileIndex, CompanyID, CompanyID) {}; 
  AddProducedCargoProc *add_produced_cargo_proc = nullptr; 
  VehicleEnterTileProc *vehicle_enter_tile_proc = nullptr; 
  GetFoundationProc *get_foundation_proc = [](TileIndex, Slope) { return Foundation::None; }; 
  TerraformTileProc *terraform_tile_proc; 
  CheckBuildAboveProc *check_build_above_proc = nullptr; 
};
 
extern const EnumIndexArray<const TileTypeProcs *, TileType, TileType::MaxSize> _tile_type_procs;
 
TrackStatus GetTileTrackStatus(TileIndex tile, TransportType mode, RoadTramType sub_mode, DiagDirection side = DiagDirection::Invalid);
VehicleEnterTileStates VehicleEnterTile(Vehicle *v, TileIndex tile, int x, int y);
void ChangeTileOwner(TileIndex tile, Owner old_owner, Owner new_owner);
void GetTileDesc(TileIndex tile, TileDesc &td);

inline void AddAcceptedCargo(TileIndex tile, CargoArray &acceptance, CargoTypes &always_accepted)
{
  AddAcceptedCargoProc *proc = _tile_type_procs[GetTileType(tile)]->add_accepted_cargo_proc;
  if (proc == nullptr) return;
  proc(tile, acceptance, always_accepted);
}

inline void AddProducedCargo(TileIndex tile, CargoArray &produced)
{
  AddProducedCargoProc *proc = _tile_type_procs[GetTileType(tile)]->add_produced_cargo_proc;
  if (proc == nullptr) return;
  proc(tile, produced);
}

inline bool MayAnimateTile(TileIndex tile)
{
  return _tile_type_procs[GetTileType(tile)]->animate_tile_proc != nullptr;
}
 
inline void AnimateTile(TileIndex tile)
{
  AnimateTileProc *proc = _tile_type_procs[GetTileType(tile)]->animate_tile_proc;
  assert(proc != nullptr);
  proc(tile);
}
 
inline bool ClickTile(TileIndex tile)
{
  ClickTileProc *proc = _tile_type_procs[GetTileType(tile)]->click_tile_proc;
  if (proc == nullptr) return false;
  return proc(tile);
}
 
#endif /* TILE_CMD_H */