tron@2186: /* $Id$ */
tron@2186: 
rubidium@9111: /** @file road_cmd.cpp Commands related to road tiles. */
belugas@6393: 
truelight@0: #include "stdafx.h"
Darkvater@1891: #include "openttd.h"
tron@3189: #include "bridge_map.h"
rubidium@6160: #include "bridge.h"
tron@6134: #include "cmd_helper.h"
tron@3101: #include "rail_map.h"
tron@3144: #include "road_map.h"
rubidium@8102: #include "road_internal.h"
tron@4232: #include "sprite.h"
rubidium@8119: #include "tile_cmd.h"
maedhros@6343: #include "landscape.h"
tron@3319: #include "town_map.h"
rubidium@8224: #include "viewport_func.h"
rubidium@8116: #include "command_func.h"
truelight@0: #include "town.h"
KUDr@3900: #include "yapf/yapf.h"
rubidium@8962: #include "depot_base.h"
rubidium@8962: #include "depot_func.h"
maedhros@6541: #include "newgrf.h"
rubidium@6679: #include "station_map.h"
rubidium@6679: #include "tunnel_map.h"
rubidium@8211: #include "variables.h"
rubidium@7582: #include "autoslope.h"
belugas@7849: #include "transparency.h"
smatz@8083: #include "tunnelbridge_map.h"
rubidium@8106: #include "window_func.h"
rubidium@8114: #include "strings_func.h"
rubidium@8144: #include "vehicle_func.h"
rubidium@8144: #include "vehicle_base.h"
rubidium@8157: #include "sound_func.h"
smatz@8342: #include "road_func.h"
smatz@8398: #include "tunnelbridge.h"
rubidium@8965: #include "cheat_func.h"
rubidium@9006: #include "functions.h"
rubidium@9009: #include "effectvehicle_func.h"
smatz@9154: #include "elrail_func.h"
rubidium@9038: #include "oldpool_func.h"
smatz@8083: 
rubidium@8264: #include "table/sprites.h"
rubidium@8264: #include "table/strings.h"
rubidium@7582: 
rubidium@9298: 
rubidium@9298: bool RoadVehiclesAreBuilt()
rubidium@9298: {
rubidium@9298: 	const Vehicle* v;
rubidium@9298: 
rubidium@9298: 	FOR_ALL_VEHICLES(v) {
rubidium@9298: 		if (v->type == VEH_ROAD) return true;
rubidium@9298: 	}
rubidium@9298: 	return false;
rubidium@9298: }
rubidium@9298: 
rubidium@9298: /**
rubidium@9298:  * Change the side of the road vehicles drive on (server only).
rubidium@9298:  * @param tile unused
rubidium@9298:  * @param flags operation to perform
rubidium@9298:  * @param p1 the side of the road; 0 = left side and 1 = right side
rubidium@9298:  * @param p2 unused
rubidium@9298:  */
rubidium@9298: CommandCost CmdSetRoadDriveSide(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
rubidium@9298: {
rubidium@9298: 	/* Check boundaries and you can only change this if NO vehicles have been built yet,
rubidium@9298: 	 * except in the intro-menu where of course it's always possible to do so. */
rubidium@9298: 	if (p1 > 1 || (_game_mode != GM_MENU && RoadVehiclesAreBuilt())) return CMD_ERROR;
rubidium@9298: 
rubidium@9298: 	if (flags & DC_EXEC) {
rubidium@9346: 		if (_game_mode == GM_MENU) {
glx@9461: 			_settings_newgame.vehicle.road_side = p1;
rubidium@9346: 		} else {
rubidium@9413: 			_settings_game.vehicle.road_side = p1;
rubidium@9346: 		}
rubidium@9298: 		InvalidateWindow(WC_GAME_OPTIONS, 0);
rubidium@9298: 	}
rubidium@9298: 	return CommandCost();
rubidium@9298: }
rubidium@9298: 
rubidium@7582: #define M(x) (1 << (x))
rubidium@7582: /* Level crossings may only be built on these slopes */
rubidium@7582: static const uint32 VALID_LEVEL_CROSSING_SLOPES = (M(SLOPE_SEN) | M(SLOPE_ENW) | M(SLOPE_NWS) | M(SLOPE_NS) | M(SLOPE_WSE) | M(SLOPE_EW) | M(SLOPE_FLAT));
rubidium@7582: #undef M
truelight@0: 
skidd13@8744: /* Invalid RoadBits on slopes  */
skidd13@8744: static const RoadBits _invalid_tileh_slopes_road[2][15] = {
skidd13@8744: 	/* The inverse of the mixable RoadBits on a leveled slope */
skidd13@8744: 	{
skidd13@8744: 		ROAD_NONE,         // SLOPE_FLAT
skidd13@8744: 		ROAD_NE | ROAD_SE, // SLOPE_W
skidd13@8744: 		ROAD_NE | ROAD_NW, // SLOPE_S
skidd13@8744: 
skidd13@8744: 		ROAD_NE,           // SLOPE_SW
skidd13@8744: 		ROAD_NW | ROAD_SW, // SLOPE_E
skidd13@8744: 		ROAD_NONE,         // SLOPE_EW
skidd13@8744: 
skidd13@8744: 		ROAD_NW,           // SLOPE_SE
skidd13@8744: 		ROAD_NONE,         // SLOPE_WSE
skidd13@8744: 		ROAD_SE | ROAD_SW, // SLOPE_N
skidd13@8744: 
skidd13@8744: 		ROAD_SE,           // SLOPE_NW
skidd13@8744: 		ROAD_NONE,         // SLOPE_NS
skidd13@8744: 		ROAD_NONE,         // SLOPE_ENW
skidd13@8744: 
skidd13@8744: 		ROAD_SW,           // SLOPE_NE
skidd13@8744: 		ROAD_NONE,         // SLOPE_SEN
skidd13@8744: 		ROAD_NONE          // SLOPE_NWS
skidd13@8744: 	},
skidd13@8744: 	/* The inverse of the allowed straight roads on a slope
skidd13@8744: 	 * (with and without a foundation). */
skidd13@8744: 	{
skidd13@8744: 		ROAD_NONE, // SLOPE_FLAT
skidd13@8744: 		ROAD_NONE, // SLOPE_W    Foundation
skidd13@8744: 		ROAD_NONE, // SLOPE_S    Foundation
skidd13@8744: 
skidd13@8744: 		ROAD_Y,    // SLOPE_SW
skidd13@8744: 		ROAD_NONE, // SLOPE_E    Foundation
skidd13@8744: 		ROAD_ALL,  // SLOPE_EW
skidd13@8744: 
skidd13@8744: 		ROAD_X,    // SLOPE_SE
skidd13@8744: 		ROAD_ALL,  // SLOPE_WSE
skidd13@8744: 		ROAD_NONE, // SLOPE_N    Foundation
skidd13@8744: 
skidd13@8744: 		ROAD_X,    // SLOPE_NW
skidd13@8744: 		ROAD_ALL,  // SLOPE_NS
skidd13@8744: 		ROAD_ALL,  // SLOPE_ENW
skidd13@8744: 
skidd13@8744: 		ROAD_Y,    // SLOPE_NE
skidd13@8744: 		ROAD_ALL,  // SLOPE_SEN
skidd13@8744: 		ROAD_ALL   // SLOPE_NW
skidd13@8744: 	}
skidd13@8744: };
skidd13@8744: 
smatz@8384: Foundation GetRoadFoundation(Slope tileh, RoadBits bits);
smatz@8384: 
frosch@9342: /**
frosch@9342:  * Is it allowed to remove the given road bits from the given tile?
frosch@9342:  * @param tile      the tile to remove the road from
frosch@9342:  * @param remove    the roadbits that are going to be removed
frosch@9342:  * @param owner     the actual owner of the roadbits of the tile
frosch@9342:  * @param rt        the road type to remove the bits from
frosch@9342:  * @param flags     command flags
frosch@9342:  * @param town_check Shall the town rating checked/affected
frosch@9342:  * @return true when it is allowed to remove the road bits
frosch@9342:  */
frosch@9342: bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, RoadType rt, uint32 flags, bool town_check)
truelight@0: {
rubidium@6661: 	if (_game_mode == GM_EDITOR || remove == ROAD_NONE) return true;
truelight@0: 
rubidium@6751: 	/* Water can always flood and towns can always remove "normal" road pieces.
rubidium@6751: 	 * Towns are not be allowed to remove non "normal" road pieces, like tram
rubidium@6751: 	 * tracks as that would result in trams that cannot turn. */
rubidium@6751: 	if (_current_player == OWNER_WATER ||
rubidium@9652: 			(rt == ROADTYPE_ROAD && !IsValidPlayerID(_current_player))) return true;
truelight@0: 
belugas@6393: 	/* Only do the special processing if the road is owned
belugas@6393: 	 * by a town */
Darkvater@4849: 	if (owner != OWNER_TOWN) return (owner == OWNER_NONE) || CheckOwnership(owner);
truelight@0: 
frosch@9342: 	if (!town_check) return true;
frosch@9342: 
tron@3017: 	if (_cheats.magic_bulldozer.value) return true;
truelight@0: 
frosch@9342: 	Town *t = ClosestTownFromTile(tile, UINT_MAX);
frosch@9342: 	if (t == NULL) return true;
frosch@9342: 
frosch@9342: 	/* check if you're allowed to remove the street owned by a town
frosch@9342: 	 * removal allowance depends on difficulty setting */
frosch@9342: 	if (!CheckforTownRating(flags, t, ROAD_REMOVE)) return false;
frosch@9342: 
belugas@6393: 	/* Get a bitmask of which neighbouring roads has a tile */
skidd13@8734: 	RoadBits n = ROAD_NONE;
skidd13@8734: 	RoadBits present = GetAnyRoadBits(tile, rt);
rubidium@6661: 	if (present & ROAD_NE && GetAnyRoadBits(TILE_ADDXY(tile, -1,  0), rt) & ROAD_SW) n |= ROAD_NE;
rubidium@6661: 	if (present & ROAD_SE && GetAnyRoadBits(TILE_ADDXY(tile,  0,  1), rt) & ROAD_NW) n |= ROAD_SE;
rubidium@6661: 	if (present & ROAD_SW && GetAnyRoadBits(TILE_ADDXY(tile,  1,  0), rt) & ROAD_NE) n |= ROAD_SW;
rubidium@6661: 	if (present & ROAD_NW && GetAnyRoadBits(TILE_ADDXY(tile,  0, -1), rt) & ROAD_SE) n |= ROAD_NW;
truelight@201: 
frosch@9342: 	int rating_decrease = RATING_ROAD_DOWN_STEP_EDGE;
belugas@6393: 	/* If 0 or 1 bits are set in n, or if no bits that match the bits to remove,
belugas@6393: 	 * then allow it */
skidd13@8734: 	if (KillFirstBit(n) != ROAD_NONE && (n & remove) != ROAD_NONE) {
belugas@6393: 		/* you can remove all kind of roads with extra dynamite */
rubidium@9413: 		if (!_settings_game.construction.extra_dynamite) {
frosch@9342: 			SetDParam(0, t->index);
frosch@9342: 			_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;
frosch@9342: 			return false;
frosch@9342: 		}
frosch@9342: 		rating_decrease = RATING_ROAD_DOWN_STEP_INNER;
truelight@0: 	}
frosch@9342: 	ChangeTownRating(t, rating_decrease, RATING_ROAD_MINIMUM);
truelight@0: 
truelight@0: 	return true;
truelight@0: }
truelight@0: 
smatz@8428: 
Darkvater@1784: /** Delete a piece of road.
tron@3491:  * @param tile tile where to remove road from
belugas@6483:  * @param flags operation to perform
smatz@8428:  * @param pieces roadbits to remove
smatz@8428:  * @param rt roadtype to remove
smatz@8428:  * @param crossing_check should we check if there is a tram track when we are removing road from crossing?
truelight@0:  */
rubidium@8912: static CommandCost RemoveRoad(TileIndex tile, uint32 flags, RoadBits pieces, RoadType rt, bool crossing_check, bool town_check = true)
truelight@0: {
frosch@9341: 	RoadTypes rts = GetRoadTypes(tile);
frosch@9341: 	/* The tile doesn't have the given road type */
frosch@9341: 	if (!HasBit(rts, rt)) return CMD_ERROR;
frosch@9341: 
frosch@9342: 	bool town_road_under_stop = false;
frosch@9342: 
rubidium@6679: 	switch (GetTileType(tile)) {
rubidium@7370: 		case MP_ROAD:
smatz@8075: 			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
rubidium@6679: 			break;
rubidium@6679: 
rubidium@6679: 		case MP_STATION:
rubidium@6679: 			if (!IsDriveThroughStopTile(tile)) return CMD_ERROR;
frosch@9342: 			if (rt == ROADTYPE_ROAD) town_road_under_stop = GetStopBuiltOnTownRoad(tile);
smatz@8075: 			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
rubidium@6679: 			break;
rubidium@6679: 
rubidium@6679: 		case MP_TUNNELBRIDGE:
smatz@8390: 			if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) return CMD_ERROR;
smatz@8390: 			if (GetVehicleTunnelBridge(tile, GetOtherTunnelBridgeEnd(tile)) != NULL) return CMD_ERROR;
smatz@8390: 			break;
rubidium@6679: 
rubidium@6679: 		default:
rubidium@6679: 			return CMD_ERROR;
rubidium@6679: 	}
Darkvater@1638: 
frosch@9342: 	if (!CheckAllowRemoveRoad(tile, pieces, town_road_under_stop ? OWNER_TOWN : GetRoadOwner(tile, rt), rt, flags, town_check)) return CMD_ERROR;
celestar@5385: 
rubidium@7370: 	if (!IsTileType(tile, MP_ROAD)) {
rubidium@6679: 		/* If it's the last roadtype, just clear the whole tile */
rubidium@6679: 		if (rts == RoadTypeToRoadTypes(rt)) return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
rubidium@6679: 
rubidium@8230: 		CommandCost cost(EXPENSES_CONSTRUCTION);
rubidium@6679: 		if (IsTileType(tile, MP_TUNNELBRIDGE)) {
smatz@8197: 			TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
rubidium@6679: 			/* Pay for *every* tile of the bridge or tunnel */
smatz@8398: 			cost.AddCost((GetTunnelBridgeLength(other_end, tile) + 2) * _price.remove_road);
rubidium@6679: 			if (flags & DC_EXEC) {
rubidium@6679: 				SetRoadTypes(other_end, GetRoadTypes(other_end) & ~RoadTypeToRoadTypes(rt));
rubidium@6679: 				SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
rubidium@6679: 
rubidium@6679: 				/* Mark tiles diry that have been repaved */
rubidium@6714: 				MarkTileDirtyByTile(tile);
rubidium@6679: 				MarkTileDirtyByTile(other_end);
rubidium@6679: 				if (IsBridge(tile)) {
smatz@8083: 					TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
rubidium@6679: 
rubidium@6713: 					for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
rubidium@6679: 				}
rubidium@6679: 			}
rubidium@6679: 		} else {
rubidium@6950: 			cost.AddCost(_price.remove_road);
rubidium@6679: 			if (flags & DC_EXEC) {
rubidium@6679: 				SetRoadTypes(tile, GetRoadTypes(tile) & ~RoadTypeToRoadTypes(rt));
rubidium@6679: 				MarkTileDirtyByTile(tile);
rubidium@6679: 			}
rubidium@6679: 		}
rubidium@8230: 		return cost;
rubidium@6679: 	}
rubidium@6679: 
celestar@5385: 	switch (GetRoadTileType(tile)) {
celestar@5385: 		case ROAD_TILE_NORMAL: {
skidd13@8744: 			const Slope tileh = GetTileSlope(tile, NULL);
rubidium@6661: 			RoadBits present = GetRoadBits(tile, rt);
skidd13@8744: 			const RoadBits other = GetOtherRoadBits(tile, rt);
skidd13@8744: 			const Foundation f = GetRoadFoundation(tileh, present);
celestar@5385: 
smatz@9067: 			if (HasRoadWorks(tile) && _current_player != OWNER_WATER) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);
celestar@5385: 
skidd13@8744: 			/* Autocomplete to a straight road
skidd13@8744: 			 * @li on steep slopes
skidd13@8744: 			 * @li if the bits of the other roadtypes result in another foundation
skidd13@8744: 			 * @li if build on slopes is disabled */
rubidium@8747: 			if (IsSteepSlope(tileh) || (IsStraightRoad(other) &&
rubidium@8747: 					(other & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) != ROAD_NONE) ||
rubidium@9413: 					(tileh != SLOPE_FLAT && !_settings_game.construction.build_on_slopes)) {
skidd13@8734: 				pieces |= MirrorRoadBits(pieces);
celestar@5385: 			}
celestar@5385: 
belugas@6393: 			/* limit the bits to delete to the existing bits. */
skidd13@8734: 			pieces &= present;
skidd13@8734: 			if (pieces == ROAD_NONE) return CMD_ERROR;
celestar@5385: 
skidd13@8744: 			/* Now set present what it will be after the remove */
skidd13@8744: 			present ^= pieces;
skidd13@8744: 
skidd13@8744: 			/* Check for invalid RoadBit combinations on slopes */
skidd13@8744: 			if (tileh != SLOPE_FLAT && present != ROAD_NONE &&
skidd13@8744: 					(present & _invalid_tileh_slopes_road[0][tileh & SLOPE_ELEVATED]) == present) {
skidd13@8744: 				return CMD_ERROR;
skidd13@8744: 			}
skidd13@8744: 
celestar@5385: 			if (flags & DC_EXEC) {
smatz@9067: 				if (HasRoadWorks(tile)) {
smatz@9067: 					/* flooding tile with road works, don't forget to remove the effect vehicle too */
smatz@9067: 					assert(_current_player == OWNER_WATER);
smatz@9067: 					Vehicle *v;
smatz@9067: 					FOR_ALL_VEHICLES(v) {
smatz@9067: 						if (v->type == VEH_EFFECT && TileVirtXY(v->x_pos, v->y_pos) == tile) {
smatz@9067: 							delete v;
smatz@9067: 						}
smatz@9067: 					}
smatz@9067: 				}
rubidium@6662: 				if (present == ROAD_NONE) {
rubidium@6661: 					RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
rubidium@6661: 					if (rts == ROADTYPES_NONE) {
rubidium@7536: 						/* Includes MarkTileDirtyByTile() */
rubidium@6661: 						DoClearSquare(tile);
rubidium@6661: 					} else {
rubidium@6662: 						SetRoadBits(tile, ROAD_NONE, rt);
rubidium@6661: 						SetRoadTypes(tile, rts);
rubidium@7536: 						MarkTileDirtyByTile(tile);
rubidium@6661: 					}
celestar@5385: 				} else {
rubidium@6764: 					/* When bits are removed, you *always* end up with something that
rubidium@6764: 					 * is not a complete straight road tile. However, trams do not have
rubidium@6764: 					 * onewayness, so they cannot remove it either. */
rubidium@6764: 					if (rt != ROADTYPE_TRAM) SetDisallowedRoadDirections(tile, DRD_NONE);
rubidium@6661: 					SetRoadBits(tile, present, rt);
celestar@5385: 					MarkTileDirtyByTile(tile);
celestar@5385: 				}
celestar@5385: 			}
skidd13@8744: 
skidd13@8744: 			/* If we change the foundation we have to pay for it. */
skidd13@8744: 			return CommandCost(EXPENSES_CONSTRUCTION, CountBits(pieces) * _price.remove_road +
skidd13@8744: 					((GetRoadFoundation(tileh, present) != f) ? _price.terraform : (Money)0));
celestar@5385: 		}
celestar@5385: 
celestar@5385: 		case ROAD_TILE_CROSSING: {
celestar@5385: 			if (pieces & ComplementRoadBits(GetCrossingRoadBits(tile))) {
tron@3176: 				return CMD_ERROR;
truelight@0: 			}
truelight@0: 
rubidium@6697: 			/* Don't allow road to be removed from the crossing when there is tram;
rubidium@6697: 			 * we can't draw the crossing without trambits ;) */
frosch@8563: 			if (rt == ROADTYPE_ROAD && HasTileRoadType(tile, ROADTYPE_TRAM) && (flags & DC_EXEC || crossing_check)) return CMD_ERROR;
rubidium@6697: 
glx@8187: 			if (flags & DC_EXEC) {
rubidium@6661: 				RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));
rubidium@6661: 				if (rts == ROADTYPES_NONE) {
rubidium@9789: 					TrackBits tracks = GetCrossingRailBits(tile);
rubidium@9789: 					bool reserved = GetCrossingReservation(tile);
rubidium@9789: 					MakeRailNormal(tile, GetTileOwner(tile), tracks, GetRailType(tile));
rubidium@9789: 					if (reserved) SetTrackReservation(tile, tracks);
rubidium@6661: 				} else {
rubidium@6661: 					SetRoadTypes(tile, rts);
rubidium@6661: 				}
tron@3060: 				MarkTileDirtyByTile(tile);
rubidium@5587: 				YapfNotifyTrackLayoutChange(tile, FindFirstTrack(GetTrackBits(tile)));
truelight@0: 			}
rubidium@8230: 			return CommandCost(EXPENSES_CONSTRUCTION, _price.remove_road * 2);
celestar@5385: 		}
tron@3977: 
celestar@5385: 		default:
celestar@5385: 		case ROAD_TILE_DEPOT:
celestar@5385: 			return CMD_ERROR;
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: 
smatz@8428: /** Delete a piece of road.
smatz@8428:  * @param tile tile where to remove road from
smatz@8428:  * @param flags operation to perform
smatz@8428:  * @param p1 bit 0..3 road pieces to remove (RoadBits)
smatz@8428:  *           bit 4..5 road type
smatz@8428:  * @param p2 unused
smatz@8428:  */
smatz@8428: CommandCost CmdRemoveRoad(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
smatz@8428: {
smatz@8428: 	RoadType rt = (RoadType)GB(p1, 4, 2);
smatz@8428: 	if (!IsValidRoadType(rt)) return CMD_ERROR;
smatz@8428: 
smatz@8428: 	RoadBits pieces = Extract<RoadBits, 0>(p1);
smatz@8428: 
smatz@8428: 	return RemoveRoad(tile, flags, pieces, rt, true);
smatz@8428: }
smatz@8428: 
rubidium@7641: /**
rubidium@7641:  * Calculate the costs for roads on slopes
rubidium@7641:  *  Aside modify the RoadBits to fit on the slopes
rubidium@7641:  *
rubidium@7641:  * @note The RoadBits are modified too!
rubidium@7641:  * @param tileh The current slope
rubidium@7641:  * @param pieces The RoadBits we want to add
skidd13@8744:  * @param existing The existent RoadBits of the current type
skidd13@8744:  * @param other The other existent RoadBits
rubidium@7641:  * @return The costs for these RoadBits on this slope
rubidium@7641:  */
smatz@8821: static CommandCost CheckRoadSlope(Slope tileh, RoadBits *pieces, RoadBits existing, RoadBits other)
truelight@0: {
skidd13@8744: 	/* Remove already build pieces */
skidd13@8744: 	CLRBITS(*pieces, existing);
skidd13@8744: 
skidd13@8744: 	/* If we can't build anything stop here */
skidd13@8744: 	if (*pieces == ROAD_NONE) return CMD_ERROR;
skidd13@8744: 
skidd13@8744: 	/* All RoadBit combos are valid on flat land */
skidd13@8744: 	if (tileh == SLOPE_FLAT) return CommandCost();
skidd13@8744: 
skidd13@8734: 	/* Proceed steep Slopes first to reduce lookup table size */
tron@4246: 	if (IsSteepSlope(tileh)) {
rubidium@7641: 		/* Force straight roads. */
rubidium@7641: 		*pieces |= MirrorRoadBits(*pieces);
rubidium@7332: 
skidd13@8744: 		/* Use existing as all existing since only straight
skidd13@8744: 		 * roads are allowed here. */
skidd13@8744: 		existing |= other;
skidd13@8744: 
skidd13@8744: 		if ((existing == ROAD_NONE || existing == *pieces) && IsStraightRoad(*pieces)) {
skidd13@8744: 			return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
tron@4246: 		}
tron@4246: 		return CMD_ERROR;
tron@4246: 	}
rubidium@7641: 
skidd13@8744: 	/* Save the merge of all bits of the current type */
skidd13@8744: 	RoadBits type_bits = existing | *pieces;
rubidium@7641: 
skidd13@8744: 	/* Roads on slopes */
rubidium@9413: 	if (_settings_game.construction.build_on_slopes && (_invalid_tileh_slopes_road[0][tileh] & (other | type_bits)) == ROAD_NONE) {
skidd13@8744: 
skidd13@8744: 		/* If we add leveling we've got to pay for it */
skidd13@8744: 		if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
skidd13@8744: 
skidd13@8744: 		return CommandCost();
rubidium@7641: 	}
truelight@0: 
skidd13@8744: 	/* Autocomplete uphill roads */
skidd13@8744: 	*pieces |= MirrorRoadBits(*pieces);
skidd13@8744: 	type_bits = existing | *pieces;
tron@3381: 
skidd13@8744: 	/* Uphill roads */
skidd13@8744: 	if (IsStraightRoad(type_bits) && (other == type_bits || other == ROAD_NONE) &&
skidd13@8744: 			(_invalid_tileh_slopes_road[1][tileh] & (other | type_bits)) == ROAD_NONE) {
tron@3381: 
skidd13@8744: 		/* Slopes with foundation ? */
skidd13@8744: 		if (IsSlopeWithOneCornerRaised(tileh)) {
rubidium@7332: 
skidd13@8744: 			/* Prevent build on slopes if it isn't allowed */
rubidium@9413: 			if (_settings_game.construction.build_on_slopes) {
skidd13@8744: 
skidd13@8744: 				/* If we add foundation we've got to pay for it */
skidd13@8744: 				if ((other | existing) == ROAD_NONE) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
skidd13@8744: 
skidd13@8744: 				return CommandCost();
skidd13@8744: 			}
skidd13@8744: 		} else {
skidd13@8744: 			if (CountBits(existing) == 1) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
skidd13@8744: 			return CommandCost();
skidd13@8744: 		}
truelight@0: 	}
truelight@0: 	return CMD_ERROR;
truelight@0: }
truelight@0: 
Darkvater@1784: /** Build a piece of road.
tron@3491:  * @param tile tile where to build road
belugas@6483:  * @param flags operation to perform
tron@6134:  * @param p1 bit 0..3 road pieces to build (RoadBits)
rubidium@6661:  *           bit 4..5 road type
rubidium@6764:  *           bit 6..7 disallowed directions to toggle
Darkvater@1784:  * @param p2 the town that is building the road (0 if not applicable)
truelight@0:  */
rubidium@6943: CommandCost CmdBuildRoad(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
rubidium@8230: 	CommandCost cost(EXPENSES_CONSTRUCTION);
smatz@8821: 
rubidium@5587: 	RoadBits existing = ROAD_NONE;
skidd13@8744: 	RoadBits other_bits = ROAD_NONE;
truelight@201: 
Darkvater@1784: 	/* Road pieces are max 4 bitset values (NE, NW, SE, SW) and town can only be non-zero
Darkvater@1784: 	 * if a non-player is building the road */
rubidium@9652: 	if ((IsValidPlayerID(_current_player) && p2 != 0) || (_current_player == OWNER_TOWN && !IsValidTownID(p2))) return CMD_ERROR;
tron@6134: 
tron@6134: 	RoadBits pieces = Extract<RoadBits, 0>(p1);
Darkvater@1784: 
smatz@8690: 	/* do not allow building 'zero' road bits, code wouldn't handle it */
smatz@8690: 	if (pieces == ROAD_NONE) return CMD_ERROR;
smatz@8690: 
rubidium@6661: 	RoadType rt = (RoadType)GB(p1, 4, 2);
truelight@7857: 	if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
rubidium@6661: 
rubidium@6764: 	DisallowedRoadDirections toggle_drd = (DisallowedRoadDirections)GB(p1, 6, 2);
rubidium@6764: 
skidd13@8734: 	Slope tileh = GetTileSlope(tile, NULL);
truelight@0: 
celestar@3434: 	switch (GetTileType(tile)) {
rubidium@7370: 		case MP_ROAD:
rubidium@3793: 			switch (GetRoadTileType(tile)) {
rubidium@6764: 				case ROAD_TILE_NORMAL: {
tron@4046: 					if (HasRoadWorks(tile)) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);
rubidium@6756: 
skidd13@8744: 					other_bits = GetOtherRoadBits(tile, rt);
frosch@8563: 					if (!HasTileRoadType(tile, rt)) break;
tron@4046: 
rubidium@6661: 					existing = GetRoadBits(tile, rt);
skidd13@8734: 					bool crossing = !IsStraightRoad(existing | pieces);
rubidium@6768: 					if (rt != ROADTYPE_TRAM && (GetDisallowedRoadDirections(tile) != DRD_NONE || toggle_drd != DRD_NONE) && crossing) {
rubidium@6764: 						/* Junctions cannot be one-way */
rubidium@6764: 						return_cmd_error(STR_ERR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
rubidium@6764: 					}
tron@3150: 					if ((existing & pieces) == pieces) {
rubidium@6764: 						/* We only want to set the (dis)allowed road directions */
frosch@9341: 						if (toggle_drd != DRD_NONE && rt != ROADTYPE_TRAM && IsRoadOwner(tile, ROADTYPE_ROAD, _current_player)) {
rubidium@6764: 							if (crossing) return_cmd_error(STR_ERR_ONEWAY_ROADS_CAN_T_HAVE_JUNCTION);
rubidium@6764: 
smatz@8601: 							if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
smatz@8601: 
rubidium@6764: 							/* Ignore half built tiles */
skidd13@8734: 							if (flags & DC_EXEC && rt != ROADTYPE_TRAM && IsStraightRoad(existing)) {
rubidium@6764: 								SetDisallowedRoadDirections(tile, GetDisallowedRoadDirections(tile) ^ toggle_drd);
rubidium@6764: 								MarkTileDirtyByTile(tile);
rubidium@6764: 							}
rubidium@6950: 							return CommandCost();
rubidium@6764: 						}
tron@3066: 						return_cmd_error(STR_1007_ALREADY_BUILT);
tron@3066: 					}
rubidium@6764: 				} break;
tron@3066: 
rubidium@3793: 				case ROAD_TILE_CROSSING:
frosch@8563: 					if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
skidd13@8744: 					other_bits = GetCrossingRoadBits(tile);
skidd13@8744: 					if (pieces & ComplementRoadBits(other_bits)) goto do_clear;
rubidium@6661: 					break;
tron@3066: 
tron@3069: 				default:
rubidium@3793: 				case ROAD_TILE_DEPOT:
tron@3066: 					goto do_clear;
tron@3060: 			}
tron@3060: 			break;
truelight@0: 
tron@3060: 		case MP_RAILWAY: {
tron@3636: 			if (IsSteepSlope(tileh)) {
tron@3060: 				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
tron@3060: 			}
tron@3060: 
tron@3104: 			/* Level crossings may only be built on these slopes */
skidd13@7928: 			if (!HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh)) {
tron@3060: 				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
tron@3060: 			}
tron@3060: 
rubidium@3792: 			if (GetRailTileType(tile) != RAIL_TILE_NORMAL) goto do_clear;
smatz@8821: 
smatz@8821: 			Axis roaddir;
tron@3269: 			switch (GetTrackBits(tile)) {
tron@3269: 				case TRACK_BIT_X:
tron@3269: 					if (pieces & ROAD_X) goto do_clear;
tron@3269: 					roaddir = AXIS_Y;
tron@3269: 					break;
tron@3269: 
tron@3269: 				case TRACK_BIT_Y:
tron@3269: 					if (pieces & ROAD_Y) goto do_clear;
tron@3269: 					roaddir = AXIS_X;
tron@3269: 					break;
tron@3269: 
tron@3269: 				default: goto do_clear;
tron@3060: 			}
tron@3060: 
belugas@6406: 			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
tron@3381: 
tron@3060: 			if (flags & DC_EXEC) {
rubidium@5587: 				YapfNotifyTrackLayoutChange(tile, FindFirstTrack(GetTrackBits(tile)));
rubidium@6697: 				/* Always add road to the roadtypes (can't draw without it) */
rubidium@9789: 				bool reserved = HasBit(GetTrackReservation(tile), AxisToTrack(OtherAxis(roaddir)));
rubidium@6697: 				MakeRoadCrossing(tile, _current_player, _current_player, _current_player, GetTileOwner(tile), roaddir, GetRailType(tile), RoadTypeToRoadTypes(rt) | ROADTYPES_ROAD, p2);
rubidium@9789: 				SetCrossingReservation(tile, reserved);
smatz@8344: 				UpdateLevelCrossing(tile, false);
tron@3100: 				MarkTileDirtyByTile(tile);
tron@3060: 			}
rubidium@8230: 			return CommandCost(EXPENSES_CONSTRUCTION, _price.build_road * (rt == ROADTYPE_ROAD ? 2 : 4));
tron@3017: 		}
truelight@0: 
rubidium@6679: 		case MP_STATION:
rubidium@9711: 			if (!IsRoadStop(tile)) goto do_clear;
rubidium@9710: 			if (IsDriveThroughStopTile(tile)) {
rubidium@9710: 				if (pieces & ~AxisToRoadBits(DiagDirToAxis(GetRoadStopDir(tile)))) goto do_clear;
rubidium@9710: 			} else {
rubidium@9710: 				if (pieces & ~DiagDirToRoadBits(GetRoadStopDir(tile))) goto do_clear;
rubidium@9710: 			}
frosch@8563: 			if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
rubidium@6679: 			break;
rubidium@6679: 
rubidium@6679: 		case MP_TUNNELBRIDGE:
smatz@8390: 			if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) return CMD_ERROR;
rubidium@9583: 			if (MirrorRoadBits(DiagDirToRoadBits(GetTunnelBridgeDirection(tile))) != pieces) return CMD_ERROR;
frosch@8563: 			if (HasTileRoadType(tile, rt)) return_cmd_error(STR_1007_ALREADY_BUILT);
smatz@8390: 			/* Don't allow adding roadtype to the bridge/tunnel when vehicles are already driving on it */
smatz@8390: 			if (GetVehicleTunnelBridge(tile, GetOtherTunnelBridgeEnd(tile)) != NULL) return CMD_ERROR;
smatz@8390: 			break;
rubidium@6679: 
smatz@8821: 		default: {
truelight@0: do_clear:;
smatz@8821: 			CommandCost ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
tron@3381: 			if (CmdFailed(ret)) return ret;
rubidium@6950: 			cost.AddCost(ret);
smatz@8821: 		} break;
truelight@0: 	}
truelight@0: 
skidd13@8744: 	if (other_bits != pieces) {
rubidium@6715: 		/* Check the foundation/slopes when adding road/tram bits */
smatz@8821: 		CommandCost ret = CheckRoadSlope(tileh, &pieces, existing, other_bits);
rubidium@6715: 		/* Return an error if we need to build a foundation (ret != 0) but the
rubidium@6715: 		 * current patch-setting is turned off (or stupid AI@work) */
rubidium@9413: 		if (CmdFailed(ret) || (ret.GetCost() != 0 && !_settings_game.construction.build_on_slopes)) {
rubidium@6715: 			return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
rubidium@6715: 		}
rubidium@6950: 		cost.AddCost(ret);
rubidium@6715: 	}
truelight@0: 
rubidium@7370: 	if (IsTileType(tile, MP_ROAD)) {
belugas@6393: 		/* Don't put the pieces that already exist */
tron@3150: 		pieces &= ComplementRoadBits(existing);
smatz@8384: 
smatz@8384: 		/* Check if new road bits will have the same foundation as other existing road types */
frosch@8563: 		if (IsNormalRoad(tile)) {
smatz@8384: 			Slope slope = GetTileSlope(tile, NULL);
smatz@8384: 			Foundation found_new = GetRoadFoundation(slope, pieces | existing);
smatz@8384: 
smatz@8384: 			/* Test if all other roadtypes can be built at that foundation */
smatz@8384: 			for (RoadType rtest = ROADTYPE_ROAD; rtest < ROADTYPE_END; rtest++) {
smatz@8384: 				if (rtest != rt) { // check only other road types
smatz@8384: 					RoadBits bits = GetRoadBits(tile, rtest);
smatz@8384: 					/* do not check if there are not road bits of given type */
smatz@8384: 					if (bits != ROAD_NONE && GetRoadFoundation(slope, bits) != found_new) {
smatz@8384: 						return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);
smatz@8384: 					}
smatz@8384: 				}
smatz@8384: 			}
smatz@8384: 		}
truelight@0: 	}
truelight@0: 
smatz@8601: 	if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
smatz@8601: 
truelight@7832: 	cost.AddCost(CountBits(pieces) * _price.build_road);
rubidium@6679: 	if (IsTileType(tile, MP_TUNNELBRIDGE)) {
rubidium@6679: 		/* Pay for *every* tile of the bridge or tunnel */
smatz@8398: 		cost.MultiplyCost(GetTunnelBridgeLength(GetOtherTunnelBridgeEnd(tile), tile) + 2);
rubidium@6679: 	}
truelight@0: 
truelight@0: 	if (flags & DC_EXEC) {
rubidium@6679: 		switch (GetTileType(tile)) {
rubidium@7370: 			case MP_ROAD: {
rubidium@6679: 				RoadTileType rtt = GetRoadTileType(tile);
rubidium@6679: 				if (existing == ROAD_NONE || rtt == ROAD_TILE_CROSSING) {
rubidium@6679: 					SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
rubidium@6679: 					SetRoadOwner(tile, rt, _current_player);
rubidium@6968: 					if (_current_player == OWNER_TOWN && rt == ROADTYPE_ROAD) SetTownIndex(tile, p2);
rubidium@6679: 				}
rubidium@6679: 				if (rtt != ROAD_TILE_CROSSING) SetRoadBits(tile, existing | pieces, rt);
rubidium@6679: 			} break;
rubidium@6679: 
rubidium@6679: 			case MP_TUNNELBRIDGE: {
smatz@8197: 				TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
rubidium@6679: 
rubidium@6679: 				SetRoadTypes(other_end, GetRoadTypes(other_end) | RoadTypeToRoadTypes(rt));
rubidium@6661: 				SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
rubidium@6679: 
rubidium@6679: 				/* Mark tiles diry that have been repaved */
rubidium@6679: 				MarkTileDirtyByTile(other_end);
rubidium@6714: 				MarkTileDirtyByTile(tile);
rubidium@6679: 				if (IsBridge(tile)) {
smatz@8083: 					TileIndexDiff delta = TileOffsByDiagDir(GetTunnelBridgeDirection(tile));
rubidium@6679: 
rubidium@6713: 					for (TileIndex t = tile + delta; t != other_end; t += delta) MarkTileDirtyByTile(t);
rubidium@6679: 				}
rubidium@6679: 			} break;
rubidium@6679: 
rubidium@6679: 			case MP_STATION:
rubidium@6679: 				SetRoadTypes(tile, GetRoadTypes(tile) | RoadTypeToRoadTypes(rt));
frosch@9342: 				if (IsDriveThroughStopTile(tile) && rt == ROADTYPE_ROAD) SetStopBuiltOnTownRoad(tile, false);
rubidium@6679: 				break;
rubidium@6679: 
rubidium@6679: 			default:
rubidium@6679: 				MakeRoadNormal(tile, pieces, RoadTypeToRoadTypes(rt), p2, _current_player, _current_player, _current_player);
rubidium@6679: 				break;
truelight@0: 		}
truelight@0: 
frosch@8563: 		if (rt != ROADTYPE_TRAM && IsNormalRoadTile(tile)) {
rubidium@6764: 			existing |= pieces;
skidd13@8734: 			SetDisallowedRoadDirections(tile, IsStraightRoad(existing) ?
rubidium@6764: 					GetDisallowedRoadDirections(tile) ^ toggle_drd : DRD_NONE);
rubidium@6764: 		}
rubidium@6764: 
truelight@0: 		MarkTileDirtyByTile(tile);
truelight@0: 	}
truelight@0: 	return cost;
truelight@0: }
truelight@0: 
Darkvater@1784: /** Build a long piece of road.
tron@3491:  * @param end_tile end tile of drag
belugas@6483:  * @param flags operation to perform
Darkvater@1784:  * @param p1 start tile of drag
Darkvater@1784:  * @param p2 various bitstuffed elements
Darkvater@1784:  * - p2 = (bit 0) - start tile starts in the 2nd half of tile (p2 & 1)
Darkvater@1784:  * - p2 = (bit 1) - end tile starts in the 2nd half of tile (p2 & 2)
Darkvater@1784:  * - p2 = (bit 2) - direction: 0 = along x-axis, 1 = along y-axis (p2 & 4)
rubidium@6662:  * - p2 = (bit 3 + 4) - road type
rubidium@6764:  * - p2 = (bit 5) - set road direction
Darkvater@1784:  */
rubidium@6943: CommandCost CmdBuildLongRoad(TileIndex end_tile, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
smatz@8821: 	CommandCost cost(EXPENSES_CONSTRUCTION);
rubidium@6710: 	bool had_bridge = false;
rubidium@7428: 	bool had_tunnel = false;
rubidium@6764: 	bool had_success = false;
rubidium@6764: 	DisallowedRoadDirections drd = DRD_NORTHBOUND;
truelight@0: 
smatz@8601: 	_error_message = INVALID_STRING_ID;
smatz@8601: 
tron@2934: 	if (p1 >= MapSize()) return CMD_ERROR;
Darkvater@1784: 
smatz@8821: 	TileIndex start_tile = p1;
rubidium@6662: 	RoadType rt = (RoadType)GB(p2, 3, 2);
truelight@7857: 	if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
truelight@0: 
Darkvater@1784: 	/* Only drag in X or Y direction dictated by the direction variable */
skidd13@7928: 	if (!HasBit(p2, 2) && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
skidd13@7928: 	if (HasBit(p2, 2)  && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
Darkvater@1784: 
Darkvater@1784: 	/* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */
skidd13@7928: 	if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
Darkvater@1784: 		TileIndex t = start_tile;
Darkvater@1784: 		start_tile = end_tile;
Darkvater@1784: 		end_tile = t;
skidd13@7954: 		p2 ^= IsInsideMM(p2 & 3, 1, 3) ? 3 : 0;
rubidium@6764: 		drd = DRD_SOUTHBOUND;
truelight@0: 	}
truelight@0: 
rubidium@6764: 	/* On the X-axis, we have to swap the initial bits, so they
rubidium@6764: 	 * will be interpreted correctly in the GTTS. Futhermore
rubidium@6764: 	 * when you just 'click' on one tile to build them. */
skidd13@7928: 	if (HasBit(p2, 2) == (start_tile == end_tile && HasBit(p2, 0) == HasBit(p2, 1))) drd ^= DRD_BOTH;
rubidium@6764: 	/* No disallowed direction bits have to be toggled */
skidd13@7928: 	if (!HasBit(p2, 5)) drd = DRD_NONE;
rubidium@6764: 
smatz@8821: 	TileIndex tile = start_tile;
belugas@6393: 	/* Start tile is the small number. */
Darkvater@1784: 	for (;;) {
skidd13@7928: 		RoadBits bits = HasBit(p2, 2) ? ROAD_Y : ROAD_X;
tron@3098: 
skidd13@7928: 		if (tile == end_tile && !HasBit(p2, 1)) bits &= ROAD_NW | ROAD_NE;
skidd13@7928: 		if (tile == start_tile && HasBit(p2, 0)) bits &= ROAD_SE | ROAD_SW;
truelight@0: 
rubidium@9583: 		_error_message = INVALID_STRING_ID;
smatz@8821: 		CommandCost ret = DoCommand(tile, drd << 6 | rt << 4 | bits, 0, flags, CMD_BUILD_ROAD);
Darkvater@1784: 		if (CmdFailed(ret)) {
Darkvater@1784: 			if (_error_message != STR_1007_ALREADY_BUILT) return CMD_ERROR;
tron@2549: 		} else {
rubidium@6764: 			had_success = true;
rubidium@7428: 			/* Only pay for the upgrade on one side of the bridges and tunnels */
rubidium@7428: 			if (IsTileType(tile, MP_TUNNELBRIDGE)) {
rubidium@7428: 				if (IsBridge(tile)) {
smatz@8083: 					if ((!had_bridge || GetTunnelBridgeDirection(tile) == DIAGDIR_SE || GetTunnelBridgeDirection(tile) == DIAGDIR_SW)) {
rubidium@7428: 						cost.AddCost(ret);
rubidium@7428: 					}
rubidium@7428: 					had_bridge = true;
smatz@8390: 				} else { // IsTunnel(tile)
smatz@8083: 					if ((!had_tunnel || GetTunnelBridgeDirection(tile) == DIAGDIR_SE || GetTunnelBridgeDirection(tile) == DIAGDIR_SW)) {
rubidium@7428: 						cost.AddCost(ret);
rubidium@7428: 					}
rubidium@7428: 					had_tunnel = true;
rubidium@6710: 				}
rubidium@6710: 			} else {
rubidium@6950: 				cost.AddCost(ret);
rubidium@6710: 			}
tron@2549: 		}
truelight@0: 
Darkvater@1784: 		if (tile == end_tile) break;
truelight@0: 
skidd13@7928: 		tile += HasBit(p2, 2) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);
truelight@0: 	}
truelight@0: 
rubidium@6764: 	return !had_success ? CMD_ERROR : cost;
truelight@0: }
truelight@0: 
Darkvater@1784: /** Remove a long piece of road.
tron@3491:  * @param end_tile end tile of drag
belugas@6483:  * @param flags operation to perform
Darkvater@1784:  * @param p1 start tile of drag
Darkvater@1784:  * @param p2 various bitstuffed elements
Darkvater@1784:  * - p2 = (bit 0) - start tile starts in the 2nd half of tile (p2 & 1)
Darkvater@1784:  * - p2 = (bit 1) - end tile starts in the 2nd half of tile (p2 & 2)
Darkvater@1784:  * - p2 = (bit 2) - direction: 0 = along x-axis, 1 = along y-axis (p2 & 4)
rubidium@6662:  * - p2 = (bit 3 + 4) - road type
Darkvater@1784:  */
rubidium@6943: CommandCost CmdRemoveLongRoad(TileIndex end_tile, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
smatz@8821: 	CommandCost cost(EXPENSES_CONSTRUCTION);
darkvater@889: 
tron@2934: 	if (p1 >= MapSize()) return CMD_ERROR;
Darkvater@1784: 
smatz@8821: 	TileIndex start_tile = p1;
rubidium@6662: 	RoadType rt = (RoadType)GB(p2, 3, 2);
rubidium@6662: 	if (!IsValidRoadType(rt)) return CMD_ERROR;
truelight@0: 
Darkvater@1784: 	/* Only drag in X or Y direction dictated by the direction variable */
skidd13@7928: 	if (!HasBit(p2, 2) && TileY(start_tile) != TileY(end_tile)) return CMD_ERROR; // x-axis
skidd13@7928: 	if (HasBit(p2, 2)  && TileX(start_tile) != TileX(end_tile)) return CMD_ERROR; // y-axis
Darkvater@1784: 
Darkvater@1784: 	/* Swap start and ending tile, also the half-tile drag var (bit 0 and 1) */
skidd13@7928: 	if (start_tile > end_tile || (start_tile == end_tile && HasBit(p2, 0))) {
Darkvater@1784: 		TileIndex t = start_tile;
Darkvater@1784: 		start_tile = end_tile;
Darkvater@1784: 		end_tile = t;
skidd13@7954: 		p2 ^= IsInsideMM(p2 & 3, 1, 3) ? 3 : 0;
truelight@0: 	}
truelight@0: 
smatz@8821: 	Money money = GetAvailableMoneyForCommand();
smatz@8821: 	TileIndex tile = start_tile;
belugas@6393: 	/* Start tile is the small number. */
Darkvater@1784: 	for (;;) {
skidd13@7928: 		RoadBits bits = HasBit(p2, 2) ? ROAD_Y : ROAD_X;
tron@3098: 
skidd13@7928: 		if (tile == end_tile && !HasBit(p2, 1)) bits &= ROAD_NW | ROAD_NE;
skidd13@7928: 		if (tile == start_tile && HasBit(p2, 0)) bits &= ROAD_SE | ROAD_SW;
truelight@201: 
belugas@6393: 		/* try to remove the halves. */
tron@3098: 		if (bits != 0) {
smatz@8821: 			CommandCost ret = RemoveRoad(tile, flags & ~DC_EXEC, bits, rt, true);
rubidium@7442: 			if (CmdSucceeded(ret)) {
rubidium@7442: 				if (flags & DC_EXEC) {
rubidium@8230: 					money -= ret.GetCost();
rubidium@8230: 					if (money < 0) {
rubidium@7442: 						_additional_cash_required = DoCommand(end_tile, start_tile, p2, flags & ~DC_EXEC, CMD_REMOVE_LONG_ROAD).GetCost();
rubidium@7442: 						return cost;
rubidium@7442: 					}
rubidium@8912: 					RemoveRoad(tile, flags, bits, rt, true, false);
rubidium@7442: 				}
rubidium@7442: 				cost.AddCost(ret);
rubidium@7442: 			}
truelight@0: 		}
truelight@0: 
Darkvater@1784: 		if (tile == end_tile) break;
truelight@0: 
skidd13@7928: 		tile += HasBit(p2, 2) ? TileDiffXY(0, 1) : TileDiffXY(1, 0);
truelight@0: 	}
truelight@0: 
rubidium@6950: 	return (cost.GetCost() == 0) ? CMD_ERROR : cost;
truelight@0: }
truelight@0: 
Darkvater@1784: /** Build a road depot.
tron@3491:  * @param tile tile where to build the depot
belugas@6483:  * @param flags operation to perform
tron@6134:  * @param p1 bit 0..1 entrance direction (DiagDirection)
rubidium@6662:  *           bit 2..3 road type
Darkvater@1784:  * @param p2 unused
celestar@2085:  *
celestar@2085:  * @todo When checking for the tile slope,
celestar@2085:  * distingush between "Flat land required" and "land sloped in wrong direction"
truelight@0:  */
rubidium@6943: CommandCost CmdBuildRoadDepot(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
truelight@0: {
tron@6134: 	DiagDirection dir = Extract<DiagDirection, 0>(p1);
rubidium@6662: 	RoadType rt = (RoadType)GB(p1, 2, 2);
rubidium@6662: 
truelight@7857: 	if (!IsValidRoadType(rt) || !ValParamRoadType(rt)) return CMD_ERROR;
Darkvater@1784: 
smatz@8821: 	Slope tileh = GetTileSlope(tile, NULL);
tron@3636: 	if (tileh != SLOPE_FLAT && (
rubidium@9413: 				!_settings_game.construction.build_on_slopes ||
tron@3636: 				IsSteepSlope(tileh) ||
tron@6134: 				!CanBuildDepotByTileh(dir, tileh)
tron@2549: 			)) {
tron@2549: 		return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
truelight@0: 	}
truelight@0: 
smatz@8821: 	CommandCost cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
Darkvater@1784: 	if (CmdFailed(cost)) return CMD_ERROR;
truelight@0: 
celestar@5385: 	if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);
celestar@5385: 
rubidium@9036: 	if (!Depot::CanAllocateItem()) return CMD_ERROR;
truelight@0: 
truelight@201: 	if (flags & DC_EXEC) {
rubidium@9036: 		Depot *dep = new Depot(tile);
truelight@0: 		dep->town_index = ClosestTownFromTile(tile, (uint)-1)->index;
truelight@0: 
rubidium@6661: 		MakeRoadDepot(tile, _current_player, dir, rt);
tron@3100: 		MarkTileDirtyByTile(tile);
truelight@0: 	}
rubidium@6950: 	return cost.AddCost(_price.build_road_depot);
truelight@0: }
truelight@0: 
rubidium@6943: static CommandCost RemoveRoadDepot(TileIndex tile, uint32 flags)
truelight@0: {
smatz@8821: 	if (!CheckTileOwnership(tile) && _current_player != OWNER_WATER) return CMD_ERROR;
truelight@0: 
rubidium@7758: 	if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
truelight@0: 
rubidium@7389: 	if (flags & DC_EXEC) {
rubidium@7389: 		DoClearSquare(tile);
rubidium@7389: 		delete GetDepotByTile(tile);
rubidium@7389: 	}
truelight@0: 
rubidium@8230: 	return CommandCost(EXPENSES_CONSTRUCTION, _price.remove_road_depot);
truelight@0: }
truelight@0: 
rubidium@6943: static CommandCost ClearTile_Road(TileIndex tile, byte flags)
tron@1977: {
rubidium@3793: 	switch (GetRoadTileType(tile)) {
rubidium@3793: 		case ROAD_TILE_NORMAL: {
rubidium@6661: 			RoadBits b = GetAllRoadBits(tile);
truelight@0: 
Darkvater@5637: 			/* Clear the road if only one piece is on the tile OR the AI tries
Darkvater@5637: 			 * to clear town road OR we are not using the DC_AUTO flag */
truelight@7832: 			if ((CountBits(b) == 1 && GetRoadBits(tile, ROADTYPE_TRAM) == ROAD_NONE) ||
frosch@9341: 			    ((flags & DC_AI_BUILDING) && GetOtherRoadBits(tile, ROADTYPE_ROAD) == ROAD_NONE && IsRoadOwner(tile, ROADTYPE_ROAD, OWNER_TOWN)) ||
Darkvater@5637: 			    !(flags & DC_AUTO)
Darkvater@5637: 				) {
rubidium@6679: 				RoadTypes rts = GetRoadTypes(tile);
rubidium@8230: 				CommandCost ret(EXPENSES_CONSTRUCTION);
rubidium@6679: 				for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
skidd13@7928: 					if (HasBit(rts, rt)) {
smatz@8428: 						CommandCost tmp_ret = RemoveRoad(tile, flags, GetRoadBits(tile, rt), rt, true);
rubidium@6679: 						if (CmdFailed(tmp_ret)) return tmp_ret;
rubidium@6950: 						ret.AddCost(tmp_ret);
rubidium@6679: 					}
rubidium@6679: 				}
rubidium@6679: 				return ret;
tron@3060: 			}
Darkvater@5637: 			return_cmd_error(STR_1801_MUST_REMOVE_ROAD_FIRST);
Darkvater@5643: 		}
truelight@0: 
rubidium@3793: 		case ROAD_TILE_CROSSING: {
rubidium@6814: 			RoadTypes rts = GetRoadTypes(tile);
rubidium@8230: 			CommandCost ret(EXPENSES_CONSTRUCTION);
tron@3060: 
tron@3069: 			if (flags & DC_AUTO) return_cmd_error(STR_1801_MUST_REMOVE_ROAD_FIRST);
tron@3060: 
rubidium@6814: 			/* Must iterate over the roadtypes in a reverse manner because
rubidium@6814: 			 * tram tracks must be removed before the road bits. */
rubidium@8859: 			RoadType rt = ROADTYPE_HWAY;
rubidium@8859: 			do {
skidd13@7928: 				if (HasBit(rts, rt)) {
smatz@8428: 					CommandCost tmp_ret = RemoveRoad(tile, flags, GetCrossingRoadBits(tile), rt, false);
rubidium@6814: 					if (CmdFailed(tmp_ret)) return tmp_ret;
rubidium@6950: 					ret.AddCost(tmp_ret);
rubidium@6814: 				}
rubidium@8859: 			} while (rt-- != ROADTYPE_ROAD);
tron@3060: 
tron@3060: 			if (flags & DC_EXEC) {
tron@3491: 				DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
tron@3060: 			}
tron@3060: 			return ret;
tron@3060: 		}
tron@3060: 
tron@3069: 		default:
rubidium@3793: 		case ROAD_TILE_DEPOT:
tron@3060: 			if (flags & DC_AUTO) {
tron@3060: 				return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED);
tron@3060: 			}
tron@3060: 			return RemoveRoadDepot(tile, flags);
truelight@0: 	}
truelight@0: }
truelight@0: 
truelight@0: 
rubidium@6248: struct DrawRoadTileStruct {
truelight@0: 	uint16 image;
truelight@0: 	byte subcoord_x;
truelight@0: 	byte subcoord_y;
rubidium@6248: };
truelight@0: 
truelight@0: #include "table/road_land.h"
truelight@0: 
skidd13@8734: /**
skidd13@8734:  * Get the foundationtype of a RoadBits Slope combination
skidd13@8734:  *
skidd13@8734:  * @param tileh The Slope part
skidd13@8734:  * @param bits The RoadBits part
skidd13@8734:  * @return The resulting Foundation
skidd13@8734:  */
rubidium@7335: Foundation GetRoadFoundation(Slope tileh, RoadBits bits)
tron@2548: {
skidd13@8734: 	/* Flat land and land without a road doesn't require a foundation */
skidd13@8734: 	if (tileh == SLOPE_FLAT || bits == ROAD_NONE) return FOUNDATION_NONE;
skidd13@8734: 
rubidium@7335: 	if (!IsSteepSlope(tileh)) {
skidd13@8744: 		/* Leveled RoadBits on a slope */
skidd13@8744: 		if ((_invalid_tileh_slopes_road[0][tileh] & bits) == ROAD_NONE) return FOUNDATION_LEVELED;
skidd13@8744: 
skidd13@8744: 		/* Straight roads without foundation on a slope */
skidd13@8744: 		if (!IsSlopeWithOneCornerRaised(tileh) &&
skidd13@8744: 				(_invalid_tileh_slopes_road[1][tileh] & bits) == ROAD_NONE)
skidd13@8744: 			return FOUNDATION_NONE;
tron@4246: 	}
truelight@0: 
skidd13@8744: 	/* Roads on steep Slopes or on Slopes with one corner raised */
rubidium@7335: 	return (bits == ROAD_X ? FOUNDATION_INCLINED_X : FOUNDATION_INCLINED_Y);
truelight@0: }
truelight@0: 
truelight@0: const byte _road_sloped_sprites[14] = {
truelight@0: 	0,  0,  2,  0,
truelight@0: 	0,  1,  0,  0,
truelight@0: 	3,  0,  0,  0,
truelight@0: 	0,  0
truelight@0: };
truelight@0: 
peter1138@2471: /**
maedhros@6541:  * Whether to draw unpaved roads regardless of the town zone.
maedhros@6541:  * By default, OpenTTD always draws roads as unpaved if they are on a desert
maedhros@6541:  * tile or above the snowline. Newgrf files, however, can set a bit that allows
maedhros@6541:  * paved roads to be built on desert tiles as they would be on grassy tiles.
maedhros@6541:  *
maedhros@6541:  * @param tile The tile the road is on
maedhros@6541:  * @param roadside What sort of road this is
maedhros@6541:  * @return True if the road should be drawn unpaved regardless of the roadside.
maedhros@6541:  */
maedhros@6541: static bool AlwaysDrawUnpavedRoads(TileIndex tile, Roadside roadside)
maedhros@6541: {
maedhros@6541: 	return (IsOnSnow(tile) &&
rubidium@9413: 			!(_settings_game.game_creation.landscape == LT_TROPIC && HasGrfMiscBit(GMB_DESERT_PAVED_ROADS) &&
maedhros@6541: 				roadside != ROADSIDE_BARREN && roadside != ROADSIDE_GRASS && roadside != ROADSIDE_GRASS_ROAD_WORKS));
maedhros@6541: }
maedhros@6541: 
maedhros@6541: /**
rubidium@6691:  * Draws the catenary for the given tile
rubidium@6691:  * @param ti   information about the tile (slopes, height etc)
rubidium@6691:  * @param tram the roadbits for the tram
rubidium@6691:  */
smatz@8821: void DrawTramCatenary(const TileInfo *ti, RoadBits tram)
rubidium@6691: {
smatz@8806: 	/* Do not draw catenary if it is invisible */
smatz@8806: 	if (IsInvisibilitySet(TO_CATENARY)) return;
smatz@8806: 
rubidium@6691: 	/* Don't draw the catenary under a low bridge */
smatz@8528: 	if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && !IsTransparencySet(TO_CATENARY)) {
rubidium@6691: 		uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
rubidium@6691: 
rubidium@6699: 		if (height <= GetTileMaxZ(ti->tile) + TILE_HEIGHT) return;
rubidium@6691: 	}
rubidium@6691: 
rubidium@6691: 	SpriteID front;
rubidium@6691: 	SpriteID back;
rubidium@6691: 
rubidium@6691: 	if (ti->tileh != SLOPE_FLAT) {
rubidium@6691: 		back  = SPR_TRAMWAY_BACK_WIRES_SLOPED  + _road_sloped_sprites[ti->tileh - 1];
rubidium@6691: 		front = SPR_TRAMWAY_FRONT_WIRES_SLOPED + _road_sloped_sprites[ti->tileh - 1];
rubidium@6691: 	} else {
rubidium@6691: 		back  = SPR_TRAMWAY_BASE + _road_backpole_sprites_1[tram];
rubidium@6691: 		front = SPR_TRAMWAY_BASE + _road_frontwire_sprites_1[tram];
rubidium@6691: 	}
rubidium@6691: 
smatz@8528: 	AddSortableSpriteToDraw(back,  PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
smatz@8528: 	AddSortableSpriteToDraw(front, PAL_NONE, ti->x, ti->y, 16, 16, TILE_HEIGHT + BB_HEIGHT_UNDER_BRIDGE, ti->z, IsTransparencySet(TO_CATENARY));
rubidium@6691: }
rubidium@6691: 
rubidium@6691: /**
rubidium@6764:  * Draws details on/around the road
rubidium@6764:  * @param img the sprite to draw
rubidium@6764:  * @param ti  the tile to draw on
rubidium@6764:  * @param dx  the offset from the top of the BB of the tile
rubidium@6764:  * @param dy  the offset from the top of the BB of the tile
rubidium@6764:  * @param h   the height of the sprite to draw
rubidium@6764:  */
smatz@8821: static void DrawRoadDetail(SpriteID img, const TileInfo *ti, int dx, int dy, int h)
rubidium@6764: {
rubidium@6764: 	int x = ti->x | dx;
rubidium@6764: 	int y = ti->y | dy;
rubidium@6764: 	byte z = ti->z;
rubidium@6764: 	if (ti->tileh != SLOPE_FLAT) z = GetSlopeZ(x, y);
rubidium@6764: 	AddSortableSpriteToDraw(img, PAL_NONE, x, y, 2, 2, h, z);
rubidium@6764: }
rubidium@6764: 
rubidium@6764: /**
peter1138@2471:  * Draw ground sprite and road pieces
peter1138@2471:  * @param ti TileInfo
peter1138@2471:  */
smatz@8821: static void DrawRoadBits(TileInfo *ti)
peter1138@2471: {
rubidium@6661: 	RoadBits road = GetRoadBits(ti->tile, ROADTYPE_ROAD);
rubidium@6691: 	RoadBits tram = GetRoadBits(ti->tile, ROADTYPE_TRAM);
rubidium@6691: 
peter1138@5668: 	SpriteID image = 0;
peter1138@5668: 	SpriteID pal = PAL_NONE;
peter1138@2471: 
tron@3636: 	if (ti->tileh != SLOPE_FLAT) {
rubidium@7335: 		DrawFoundation(ti, GetRoadFoundation(ti->tileh, road | tram));
peter1138@2471: 
belugas@6393: 		/* DrawFoundation() modifies ti.
belugas@6393: 		 * Default sloped sprites.. */
tron@3636: 		if (ti->tileh != SLOPE_FLAT) image = _road_sloped_sprites[ti->tileh - 1] + 0x53F;
peter1138@2471: 	}
peter1138@2471: 
rubidium@6691: 	if (image == 0) image = _road_tile_sprites_1[road != ROAD_NONE ? road : tram];
peter1138@2471: 
smatz@8821: 	Roadside roadside = GetRoadside(ti->tile);
peter1138@2471: 
maedhros@6541: 	if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
peter1138@2471: 		image += 19;
tron@4048: 	} else {
tron@4048: 		switch (roadside) {
peter1138@5668: 			case ROADSIDE_BARREN:           pal = PALETTE_TO_BARE_LAND; break;
tron@4048: 			case ROADSIDE_GRASS:            break;
tron@4048: 			case ROADSIDE_GRASS_ROAD_WORKS: break;
tron@4048: 			default:                        image -= 19; break; // Paved
tron@4048: 		}
peter1138@2471: 	}
peter1138@2471: 
peter1138@5668: 	DrawGroundSprite(image, pal);
peter1138@2471: 
rubidium@6691: 	/* For tram we overlay the road graphics with either tram tracks only
rubidium@6691: 	 * (when there is actual road beneath the trams) or with tram tracks
rubidium@6691: 	 * and some dirts which hides the road graphics */
rubidium@6691: 	if (tram != ROAD_NONE) {
rubidium@6691: 		if (ti->tileh != SLOPE_FLAT) {
rubidium@6691: 			image = _road_sloped_sprites[ti->tileh - 1] + SPR_TRAMWAY_SLOPED_OFFSET;
rubidium@6691: 		} else {
rubidium@6691: 			image = _road_tile_sprites_1[tram] - SPR_ROAD_Y;
rubidium@6691: 		}
rubidium@6691: 		image += (road == ROAD_NONE) ? SPR_TRAMWAY_TRAM : SPR_TRAMWAY_OVERLAY;
rubidium@6691: 		DrawGroundSprite(image, pal);
rubidium@6691: 	}
rubidium@6691: 
rubidium@6965: 	if (road != ROAD_NONE) {
rubidium@6965: 		DisallowedRoadDirections drd = GetDisallowedRoadDirections(ti->tile);
rubidium@6965: 		if (drd != DRD_NONE) {
rubidium@6965: 			DrawRoadDetail(SPR_ONEWAY_BASE + drd - 1 + ((road == ROAD_X) ? 0 : 3), ti, 8, 8, 0);
rubidium@6965: 		}
rubidium@6965: 	}
rubidium@6965: 
celestar@3430: 	if (HasRoadWorks(ti->tile)) {
belugas@6393: 		/* Road works */
rubidium@6691: 		DrawGroundSprite((road | tram) & ROAD_X ? SPR_EXCAVATION_X : SPR_EXCAVATION_Y, PAL_NONE);
peter1138@2471: 		return;
peter1138@2471: 	}
peter1138@2471: 
rubidium@6691: 	if (tram != ROAD_NONE) DrawTramCatenary(ti, tram);
rubidium@6691: 
belugas@6393: 	/* Return if full detail is disabled, or we are zoomed fully out. */
skidd13@7928: 	if (!HasBit(_display_opt, DO_FULL_DETAIL) || _cur_dpi->zoom > ZOOM_LVL_DETAIL) return;
tron@5148: 
smatz@8589: 	/* Do not draw details (street lights, trees) under low bridge */
smatz@8589: 	if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && (roadside == ROADSIDE_TREES || roadside == ROADSIDE_STREET_LIGHTS)) {
smatz@8589: 		uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
smatz@8589: 		uint minz = GetTileMaxZ(ti->tile) + 2 * TILE_HEIGHT;
smatz@8589: 
smatz@8589: 		if (roadside == ROADSIDE_TREES) minz += TILE_HEIGHT;
smatz@8589: 
smatz@8589: 		if (height < minz) return;
smatz@8589: 	}
smatz@8589: 
belugas@8647: 	/* If there are no road bits, return, as there is nothing left to do */
belugas@8647: 	if (CountBits(road) < 2) return;
belugas@8647: 
belugas@6393: 	/* Draw extra details. */
smatz@8821: 	for (const DrawRoadTileStruct *drts = _road_display_table[roadside][road | tram]; drts->image != 0; drts++) {
rubidium@6764: 		DrawRoadDetail(drts->image, ti, drts->subcoord_x, drts->subcoord_y, 0x10);
peter1138@2471: 	}
peter1138@2471: }
peter1138@2471: 
truelight@0: static void DrawTile_Road(TileInfo *ti)
truelight@0: {
rubidium@3793: 	switch (GetRoadTileType(ti->tile)) {
rubidium@3793: 		case ROAD_TILE_NORMAL:
tron@4081: 			DrawRoadBits(ti);
tron@3060: 			break;
truelight@0: 
rubidium@3793: 		case ROAD_TILE_CROSSING: {
rubidium@7335: 			if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
truelight@0: 
smatz@8821: 			SpriteID image = GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.crossing;
smatz@8821: 			SpriteID pal = PAL_NONE;
tron@3060: 
tron@3272: 			if (GetCrossingRoadAxis(ti->tile) == AXIS_X) image++;
celestar@3322: 			if (IsCrossingBarred(ti->tile)) image += 2;
tron@3060: 
smatz@8821: 			Roadside roadside = GetRoadside(ti->tile);
smatz@8821: 
maedhros@6541: 			if (AlwaysDrawUnpavedRoads(ti->tile, roadside)) {
tron@3060: 				image += 8;
tron@3060: 			} else {
maedhros@6541: 				switch (roadside) {
peter1138@5668: 					case ROADSIDE_BARREN: pal = PALETTE_TO_BARE_LAND; break;
tron@4048: 					case ROADSIDE_GRASS:  break;
tron@4048: 					default:              image += 4; break; // Paved
tron@4048: 				}
tron@3060: 			}
tron@3060: 
peter1138@5668: 			DrawGroundSprite(image, pal);
rubidium@9785: 
rubidium@9785: 			/* PBS debugging, draw reserved tracks darker */
rubidium@9785: 			if (_settings_client.gui.show_track_reservation && GetCrossingReservation(ti->tile)) {
rubidium@9785: 				DrawGroundSprite(GetCrossingRoadAxis(ti->tile) == AXIS_Y ? GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_y : GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.single_x, PALETTE_CRASH);
rubidium@9785: 			}
rubidium@9785: 
frosch@8563: 			if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
rubidium@6697: 				DrawGroundSprite(SPR_TRAMWAY_OVERLAY + (GetCrossingRoadAxis(ti->tile) ^ 1), pal);
rubidium@6697: 				DrawTramCatenary(ti, GetCrossingRoadBits(ti->tile));
rubidium@6697: 			}
smatz@9154: 			if (HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
tron@3060: 			break;
truelight@0: 		}
truelight@0: 
tron@3098: 		default:
rubidium@3793: 		case ROAD_TILE_DEPOT: {
rubidium@7335: 			if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);
tron@1398: 
smatz@8821: 			SpriteID palette = PLAYER_SPRITE_COLOR(GetTileOwner(ti->tile));
truelight@0: 
smatz@8821: 			const DrawTileSprites *dts;
frosch@8563: 			if (HasTileRoadType(ti->tile, ROADTYPE_TRAM)) {
rubidium@6691: 				dts =  &_tram_depot[GetRoadDepotDirection(ti->tile)];
rubidium@6691: 			} else {
rubidium@6691: 				dts =  &_road_depot[GetRoadDepotDirection(ti->tile)];
rubidium@6691: 			}
rubidium@6691: 
frosch@8571: 			DrawGroundSprite(dts->ground.sprite, PAL_NONE);
tron@3060: 
smatz@8806: 			/* End now if buildings are invisible */
smatz@8806: 			if (IsInvisibilitySet(TO_BUILDINGS)) break;
smatz@8806: 
smatz@8821: 			for (const DrawTileSeqStruct *dtss = dts->seq; dtss->image.sprite != 0; dtss++) {
frosch@8570: 				SpriteID image = dtss->image.sprite;
peter1138@5668: 				SpriteID pal;
tron@3060: 
skidd13@7928: 				if (!IsTransparencySet(TO_BUILDINGS) && HasBit(image, PALETTE_MODIFIER_COLOR)) {
peter1138@5668: 					pal = palette;
peter1138@5668: 				} else {
peter1138@5668: 					pal = PAL_NONE;
tron@4226: 				}
tron@3060: 
tron@4077: 				AddSortableSpriteToDraw(
peter1138@5668: 					image, pal,
tron@4232: 					ti->x + dtss->delta_x, ti->y + dtss->delta_y,
tron@4232: 					dtss->size_x, dtss->size_y,
rubidium@7333: 					dtss->size_z, ti->z,
belugas@7849: 					IsTransparencySet(TO_BUILDINGS)
tron@3060: 				);
tron@3060: 			}
tron@3060: 			break;
truelight@0: 		}
truelight@0: 	}
celestar@5385: 	DrawBridgeMiddle(ti);
truelight@0: }
truelight@0: 
rubidium@6666: void DrawRoadDepotSprite(int x, int y, DiagDirection dir, RoadType rt)
truelight@0: {
peter1138@5668: 	SpriteID palette = PLAYER_SPRITE_COLOR(_local_player);
smatz@8821: 	const DrawTileSprites *dts = (rt == ROADTYPE_TRAM) ? &_tram_depot[dir] : &_road_depot[dir];
truelight@0: 
tron@2639: 	x += 33;
tron@2639: 	y += 17;
truelight@0: 
frosch@8571: 	DrawSprite(dts->ground.sprite, PAL_NONE, x, y);
truelight@0: 
smatz@8821: 	for (const DrawTileSeqStruct *dtss = dts->seq; dtss->image.sprite != 0; dtss++) {
tron@4232: 		Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z);
frosch@8570: 		SpriteID image = dtss->image.sprite;
truelight@201: 
skidd13@7928: 		DrawSprite(image, HasBit(image, PALETTE_MODIFIER_COLOR) ? palette : PAL_NONE, x + pt.x, y + pt.y);
truelight@0: 	}
truelight@0: }
truelight@0: 
tron@4231: static uint GetSlopeZ_Road(TileIndex tile, uint x, uint y)
truelight@0: {
tron@4231: 	uint z;
tron@4231: 	Slope tileh = GetTileSlope(tile, &z);
tron@3098: 
tron@3636: 	if (tileh == SLOPE_FLAT) return z;
frosch@8563: 	if (IsNormalRoad(tile)) {
rubidium@7335: 		Foundation f = GetRoadFoundation(tileh, GetAllRoadBits(tile));
rubidium@7335: 		z += ApplyFoundationToSlope(f, &tileh);
tron@4231: 		return z + GetPartialZ(x & 0xF, y & 0xF, tileh);
tron@3286: 	} else {
tron@3645: 		return z + TILE_HEIGHT;
truelight@0: 	}
dominik@39: }
dominik@39: 
rubidium@7335: static Foundation GetFoundation_Road(TileIndex tile, Slope tileh)
dominik@39: {
frosch@8563: 	if (IsNormalRoad(tile)) {
rubidium@7335: 		return GetRoadFoundation(tileh, GetAllRoadBits(tile));
tron@3286: 	} else {
rubidium@7335: 		return FlatteningFoundation(tileh);
dominik@39: 	}
truelight@0: }
truelight@0: 
tron@1977: static void GetAcceptedCargo_Road(TileIndex tile, AcceptedCargo ac)
truelight@0: {
truelight@0: 	/* not used */
truelight@0: }
truelight@0: 
tron@1977: static void AnimateTile_Road(TileIndex tile)
truelight@0: {
tron@2639: 	if (IsLevelCrossing(tile)) MarkTileDirtyByTile(tile);
truelight@0: }
truelight@0: 
tron@4048: 
tron@4048: static const Roadside _town_road_types[][2] = {
tron@4048: 	{ ROADSIDE_GRASS,         ROADSIDE_GRASS },
tron@4048: 	{ ROADSIDE_PAVED,         ROADSIDE_PAVED },
tron@4048: 	{ ROADSIDE_PAVED,         ROADSIDE_PAVED },
tron@4048: 	{ ROADSIDE_TREES,         ROADSIDE_TREES },
tron@4048: 	{ ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
truelight@0: };
truelight@0: 
tron@4048: static const Roadside _town_road_types_2[][2] = {
tron@4048: 	{ ROADSIDE_GRASS,         ROADSIDE_GRASS },
tron@4048: 	{ ROADSIDE_PAVED,         ROADSIDE_PAVED },
tron@4048: 	{ ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
tron@4048: 	{ ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED },
tron@4048: 	{ ROADSIDE_STREET_LIGHTS, ROADSIDE_PAVED }
truelight@0: };
truelight@0: 
truelight@0: 
tron@1977: static void TileLoop_Road(TileIndex tile)
truelight@0: {
rubidium@9413: 	switch (_settings_game.game_creation.landscape) {
belugas@6357: 		case LT_ARCTIC:
maedhros@6343: 			if (IsOnSnow(tile) != (GetTileZ(tile) > GetSnowLine())) {
celestar@3430: 				ToggleSnow(tile);
tron@3017: 				MarkTileDirtyByTile(tile);
tron@3017: 			}
tron@3017: 			break;
tron@3017: 
belugas@6357: 		case LT_TROPIC:
celestar@3430: 			if (GetTropicZone(tile) == TROPICZONE_DESERT && !IsOnDesert(tile)) {
celestar@3430: 				ToggleDesert(tile);
tron@3017: 				MarkTileDirtyByTile(tile);
tron@3017: 			}
tron@3017: 			break;
truelight@0: 	}
truelight@0: 
frosch@8563: 	if (IsRoadDepot(tile)) return;
truelight@0: 
smatz@8821: 	const Town *t = ClosestTownFromTile(tile, (uint)-1);
celestar@3430: 	if (!HasRoadWorks(tile)) {
belugas@8308: 		HouseZonesBits grp = HZB_TOWN_EDGE;
truelight@1280: 
truelight@0: 		if (t != NULL) {
truelight@0: 			grp = GetTownRadiusGroup(t, tile);
truelight@201: 
belugas@6393: 			/* Show an animation to indicate road work */
truelight@201: 			if (t->road_build_months != 0 &&
belugas@8308: 					(DistanceManhattan(t->xy, tile) < 8 || grp != HZB_TOWN_EDGE) &&
frosch@8563: 					IsNormalRoad(tile) && CountBits(GetAllRoadBits(tile)) > 1 ) {
skidd13@7967: 				if (GetTileSlope(tile, NULL) == SLOPE_FLAT && EnsureNoVehicleOnGround(tile) && Chance16(1, 40)) {
celestar@3430: 					StartRoadWorks(tile);
truelight@201: 
tron@541: 					SndPlayTileFx(SND_21_JACKHAMMER, tile);
truelight@0: 					CreateEffectVehicleAbove(
celestar@3421: 						TileX(tile) * TILE_SIZE + 7,
celestar@3421: 						TileY(tile) * TILE_SIZE + 7,
truelight@0: 						0,
tron@1359: 						EV_BULLDOZER);
truelight@0: 					MarkTileDirtyByTile(tile);
truelight@0: 					return;
truelight@0: 				}
truelight@0: 			}
truelight@0: 		}
truelight@0: 
truelight@0: 		{
celestar@3430: 			/* Adjust road ground type depending on 'grp' (grp is the distance to the center) */
rubidium@9413: 			const Roadside* new_rs = (_settings_game.game_creation.landscape == LT_TOYLAND) ? _town_road_types_2[grp] : _town_road_types[grp];
tron@4048: 			Roadside cur_rs = GetRoadside(tile);
truelight@201: 
celestar@3430: 			/* We have our desired type, do nothing */
tron@4048: 			if (cur_rs == new_rs[0]) return;
celestar@3430: 
celestar@3430: 			/* We have the pre-type of the desired type, switch to the desired type */
tron@4048: 			if (cur_rs == new_rs[1]) {
tron@4048: 				cur_rs = new_rs[0];
celestar@3430: 			/* We have barren land, install the pre-type */
tron@4048: 			} else if (cur_rs == ROADSIDE_BARREN) {
tron@4048: 				cur_rs = new_rs[1];
celestar@3430: 			/* We're totally off limits, remove any installation and make barren land */
truelight@0: 			} else {
tron@4048: 				cur_rs = ROADSIDE_BARREN;
truelight@0: 			}
tron@4048: 			SetRoadside(tile, cur_rs);
truelight@0: 			MarkTileDirtyByTile(tile);
truelight@0: 		}
celestar@3430: 	} else if (IncreaseRoadWorksCounter(tile)) {
celestar@3430: 		TerminateRoadWorks(tile);
rubidium@7641: 
rubidium@9413: 		if (_settings_game.economy.mod_road_rebuild) {
rubidium@7641: 			/* Generate a nicer town surface */
rubidium@7641: 			const RoadBits old_rb = GetAnyRoadBits(tile, ROADTYPE_ROAD);
rubidium@7641: 			const RoadBits new_rb = CleanUpRoadBits(tile, old_rb);
rubidium@7641: 
rubidium@7641: 			if (old_rb != new_rb) {
smatz@8428: 				RemoveRoad(tile, DC_EXEC | DC_AUTO | DC_NO_WATER, (old_rb ^ new_rb), ROADTYPE_ROAD, true);
rubidium@7641: 			}
rubidium@7641: 		}
rubidium@7641: 
truelight@0: 		MarkTileDirtyByTile(tile);
truelight@0: 	}
truelight@0: }
truelight@0: 
tron@1977: static void ClickTile_Road(TileIndex tile)
truelight@0: {
frosch@8563: 	if (IsRoadDepot(tile)) ShowDepotWindow(tile, VEH_ROAD);
truelight@0: }
truelight@0: 
frosch@8616: /* Converts RoadBits to TrackBits */
truelight@0: static const byte _road_trackbits[16] = {
truelight@0: 	0x0, 0x0, 0x0, 0x10, 0x0, 0x2, 0x8, 0x1A, 0x0, 0x4, 0x1, 0x15, 0x20, 0x26, 0x29, 0x3F,
truelight@0: };
truelight@0: 
frosch@8616: static TrackStatus GetTileTrackStatus_Road(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
tron@1977: {
frosch@8616: 	TrackdirBits trackdirbits = TRACKDIR_BIT_NONE;
frosch@8616: 	TrackdirBits red_signals = TRACKDIR_BIT_NONE; // crossing barred
tron@3066: 	switch (mode) {
tron@3066: 		case TRANSPORT_RAIL:
frosch@8616: 			if (IsLevelCrossing(tile)) trackdirbits = TrackBitsToTrackdirBits(GetCrossingRailBits(tile));
frosch@8616: 			break;
truelight@201: 
tron@3066: 		case TRANSPORT_ROAD:
frosch@8616: 			if ((GetRoadTypes(tile) & sub_mode) == 0) break;
rubidium@3793: 			switch (GetRoadTileType(tile)) {
rubidium@6683: 				case ROAD_TILE_NORMAL: {
rubidium@6764: 					const uint drd_to_multiplier[DRD_END] = { 0x101, 0x100, 0x1, 0x0 };
smatz@8596: 					RoadType rt = (RoadType)FindFirstBit(sub_mode);
smatz@8596: 					RoadBits bits = GetRoadBits(tile, rt);
smatz@8596: 
smatz@8596: 					/* no roadbit at this side of tile, return 0 */
frosch@8616: 					if (side != INVALID_DIAGDIR && (DiagDirToRoadBits(side) & bits) == 0) break;
smatz@8596: 
rubidium@6764: 					uint multiplier = drd_to_multiplier[rt == ROADTYPE_TRAM ? DRD_NONE : GetDisallowedRoadDirections(tile)];
frosch@8616: 					if (!HasRoadWorks(tile)) trackdirbits = (TrackdirBits)(_road_trackbits[bits] * multiplier);
frosch@8616: 					break;
rubidium@6683: 				}
tron@3066: 
rubidium@3793: 				case ROAD_TILE_CROSSING: {
smatz@8596: 					Axis axis = GetCrossingRoadAxis(tile);
tron@3272: 
frosch@8616: 					if (side != INVALID_DIAGDIR && axis != DiagDirToAxis(side)) break;
smatz@8596: 
frosch@8616: 					trackdirbits = TrackBitsToTrackdirBits(AxisToTrackBits(axis));
frosch@8616: 					if (IsCrossingBarred(tile)) red_signals = trackdirbits;
frosch@8616: 					break;
tron@3066: 				}
tron@3066: 
tron@3069: 				default:
smatz@8596: 				case ROAD_TILE_DEPOT: {
smatz@8596: 					DiagDirection dir = GetRoadDepotDirection(tile);
smatz@8596: 
frosch@8616: 					if (side != INVALID_DIAGDIR && side != dir) break;
smatz@8596: 
smatz@9224: 					trackdirbits = TrackBitsToTrackdirBits(DiagDirToDiagTrackBits(dir));
frosch@8616: 					break;
smatz@8596: 				}
truelight@201: 			}
tron@3066: 			break;
tron@3066: 
tron@3066: 		default: break;
truelight@0: 	}
frosch@8616: 	return CombineTrackStatus(trackdirbits, red_signals);
truelight@0: }
truelight@0: 
truelight@0: static const StringID _road_tile_strings[] = {
truelight@0: 	STR_1814_ROAD,
truelight@0: 	STR_1814_ROAD,
truelight@0: 	STR_1814_ROAD,
truelight@0: 	STR_1815_ROAD_WITH_STREETLIGHTS,
truelight@0: 	STR_1814_ROAD,
truelight@0: 	STR_1816_TREE_LINED_ROAD,
truelight@0: 	STR_1814_ROAD,
truelight@0: 	STR_1814_ROAD,
truelight@0: };
truelight@0: 
tron@1977: static void GetTileDesc_Road(TileIndex tile, TileDesc *td)
truelight@0: {
frosch@9322: 	Owner rail_owner = INVALID_OWNER;
frosch@9322: 	Owner road_owner = INVALID_OWNER;
frosch@9322: 	Owner tram_owner = INVALID_OWNER;
frosch@9322: 
rubidium@3793: 	switch (GetRoadTileType(tile)) {
frosch@9322: 		case ROAD_TILE_CROSSING: {
frosch@9322: 			td->str = STR_1818_ROAD_RAIL_LEVEL_CROSSING;
frosch@9322: 			RoadTypes rts = GetRoadTypes(tile);
frosch@9322: 			rail_owner = GetTileOwner(tile);
frosch@9322: 			if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
frosch@9322: 			if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
frosch@9322: 			break;
frosch@9322: 		}
frosch@9322: 
frosch@9322: 		case ROAD_TILE_DEPOT:
frosch@9322: 			td->str = STR_1817_ROAD_VEHICLE_DEPOT;
frosch@9322: 			road_owner = GetTileOwner(tile); // Tile has only one owner, roadtype does not matter
frosch@9322: 			break;
frosch@9322: 
frosch@9322: 		default: {
frosch@9322: 			RoadTypes rts = GetRoadTypes(tile);
frosch@9322: 			td->str = (HasBit(rts, ROADTYPE_ROAD) ? _road_tile_strings[GetRoadside(tile)] : STR_TRAMWAY);
frosch@9322: 			if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
frosch@9322: 			if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
frosch@9322: 			break;
frosch@9322: 		}
frosch@9322: 	}
frosch@9322: 
frosch@9322: 	/* Now we have to discover, if the tile has only one owner or many:
frosch@9322: 	 *   - Find a first_owner of the tile. (Currently road or tram must be present, but this will break when the third type becomes available)
frosch@9322: 	 *   - Compare the found owner with the other owners, and test if they differ.
frosch@9322: 	 * Note: If road exists it will be the first_owner.
frosch@9322: 	 */
frosch@9322: 	Owner first_owner = (road_owner == INVALID_OWNER ? tram_owner : road_owner);
frosch@9322: 	bool mixed_owners = (tram_owner != INVALID_OWNER && tram_owner != first_owner) || (rail_owner != INVALID_OWNER && rail_owner != first_owner);
frosch@9322: 
frosch@9322: 	if (mixed_owners) {
frosch@9322: 		/* Multiple owners */
frosch@9322: 		td->owner_type[0] = (rail_owner == INVALID_OWNER ? STR_NULL : STR_RAIL_OWNER);
frosch@9322: 		td->owner[0] = rail_owner;
frosch@9322: 		td->owner_type[1] = (road_owner == INVALID_OWNER ? STR_NULL : STR_ROAD_OWNER);
frosch@9322: 		td->owner[1] = road_owner;
frosch@9322: 		td->owner_type[2] = (tram_owner == INVALID_OWNER ? STR_NULL : STR_TRAM_OWNER);
frosch@9322: 		td->owner[2] = tram_owner;
frosch@9322: 	} else {
frosch@9322: 		/* One to rule them all */
frosch@9322: 		td->owner[0] = first_owner;
tron@3069: 	}
truelight@0: }
truelight@0: 
maedhros@6723: /**
maedhros@6723:  * Given the direction the road depot is pointing, this is the direction the
maedhros@6723:  * vehicle should be travelling in in order to enter the depot.
maedhros@6723:  */
maedhros@6723: static const byte _roadveh_enter_depot_dir[4] = {
maedhros@6723: 	TRACKDIR_X_SW, TRACKDIR_Y_NW, TRACKDIR_X_NE, TRACKDIR_Y_SE
truelight@0: };
truelight@0: 
rubidium@8119: static VehicleEnterTileStatus VehicleEnter_Road(Vehicle *v, TileIndex tile, int x, int y)
truelight@0: {
rubidium@3793: 	switch (GetRoadTileType(tile)) {
rubidium@3793: 		case ROAD_TILE_CROSSING:
smatz@8342: 			if (v->type == VEH_TRAIN) {
smatz@8342: 				/* it should be barred */
smatz@8342: 				assert(IsCrossingBarred(tile));
truelight@0: 			}
tron@3060: 			break;
tron@3060: 
rubidium@3793: 		case ROAD_TILE_DEPOT:
rubidium@6259: 			if (v->type == VEH_ROAD &&
tron@4077: 					v->u.road.frame == 11 &&
maedhros@6723: 					_roadveh_enter_depot_dir[GetRoadDepotDirection(tile)] == v->u.road.state) {
maedhros@6857: 				v->u.road.state = RVSB_IN_DEPOT;
maedhros@6857: 				v->vehstatus |= VS_HIDDEN;
maedhros@6857: 				v->direction = ReverseDir(v->direction);
rubidium@7492: 				if (v->Next() == NULL) VehicleEnterDepot(v);
maedhros@6857: 				v->tile = tile;
maedhros@6857: 
maedhros@6857: 				InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
rubidium@5991: 				return VETSB_ENTERED_WORMHOLE;
tron@3060: 			}
tron@3060: 			break;
tron@3060: 
tron@3060: 		default: break;
truelight@0: 	}
rubidium@5991: 	return VETSB_CONTINUE;
truelight@0: }
truelight@0: 
truelight@0: 
Darkvater@2436: static void ChangeTileOwner_Road(TileIndex tile, PlayerID old_player, PlayerID new_player)
truelight@0: {
frosch@8563: 	if (IsRoadDepot(tile)) {
rubidium@6717: 		if (GetTileOwner(tile) == old_player) {
rubidium@6717: 			if (new_player == PLAYER_SPECTATOR) {
smatz@8519: 				DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
rubidium@6717: 			} else {
rubidium@6717: 				SetTileOwner(tile, new_player);
rubidium@6717: 			}
rubidium@6689: 		}
rubidium@6661: 		return;
truelight@0: 	}
truelight@0: 
rubidium@6661: 	for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
frosch@9341: 		/* Update all roadtypes, no matter if they are present */
rubidium@6661: 		if (GetRoadOwner(tile, rt) == old_player) {
rubidium@6661: 			SetRoadOwner(tile, rt, new_player == PLAYER_SPECTATOR ? OWNER_NONE : new_player);
rubidium@6661: 		}
rubidium@6661: 	}
tron@3060: 
rubidium@6661: 	if (IsLevelCrossing(tile)) {
rubidium@6689: 		if (GetTileOwner(tile) == old_player) {
rubidium@6689: 			if (new_player == PLAYER_SPECTATOR) {
smatz@8598: 				DoCommand(tile, 0, GetCrossingRailTrack(tile), DC_EXEC | DC_BANKRUPT, CMD_REMOVE_SINGLE_RAIL);
rubidium@6689: 			} else {
rubidium@6689: 				SetTileOwner(tile, new_player);
rubidium@6689: 			}
rubidium@6689: 		}
truelight@0: 	}
truelight@0: }
truelight@0: 
rubidium@7494: static CommandCost TerraformTile_Road(TileIndex tile, uint32 flags, uint z_new, Slope tileh_new)
rubidium@7494: {
rubidium@9413: 	if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
rubidium@7582: 		switch (GetRoadTileType(tile)) {
rubidium@7582: 			case ROAD_TILE_CROSSING:
rubidium@8230: 				if (!IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new)) && HasBit(VALID_LEVEL_CROSSING_SLOPES, tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
rubidium@7582: 				break;
rubidium@7582: 
rubidium@7582: 			case ROAD_TILE_DEPOT:
rubidium@8230: 				if (AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, GetRoadDepotDirection(tile))) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
rubidium@7582: 				break;
rubidium@7582: 
rubidium@7582: 			case ROAD_TILE_NORMAL: {
rubidium@7582: 				RoadBits bits = GetAllRoadBits(tile);
rubidium@7582: 				RoadBits bits_copy = bits;
rubidium@7582: 				/* Check if the slope-road_bits combination is valid at all, i.e. it is save to call GetRoadFoundation(). */
skidd13@8744: 				if (!CmdFailed(CheckRoadSlope(tileh_new, &bits_copy, ROAD_NONE, ROAD_NONE))) {
rubidium@7582: 					/* CheckRoadSlope() sometimes changes the road_bits, if it does not agree with them. */
rubidium@7582: 					if (bits == bits_copy) {
rubidium@7582: 						uint z_old;
rubidium@7582: 						Slope tileh_old = GetTileSlope(tile, &z_old);
rubidium@7582: 
rubidium@7582: 						/* Get the slope on top of the foundation */
rubidium@7582: 						z_old += ApplyFoundationToSlope(GetRoadFoundation(tileh_old, bits), &tileh_old);
rubidium@7582: 						z_new += ApplyFoundationToSlope(GetRoadFoundation(tileh_new, bits), &tileh_new);
rubidium@7582: 
rubidium@7582: 						/* The surface slope must not be changed */
rubidium@8230: 						if ((z_old == z_new) && (tileh_old == tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
rubidium@7582: 					}
rubidium@7582: 				}
rubidium@7582: 				break;
rubidium@7582: 			}
rubidium@7582: 
rubidium@7582: 			default: NOT_REACHED();
rubidium@7582: 		}
rubidium@7582: 	}
rubidium@7582: 
rubidium@7494: 	return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
rubidium@7494: }
rubidium@7494: 
truelight@0: 
rubidium@5587: extern const TileTypeProcs _tile_type_road_procs = {
rubidium@4344: 	DrawTile_Road,           /* draw_tile_proc */
rubidium@4344: 	GetSlopeZ_Road,          /* get_slope_z_proc */
rubidium@4344: 	ClearTile_Road,          /* clear_tile_proc */
rubidium@4344: 	GetAcceptedCargo_Road,   /* get_accepted_cargo_proc */
rubidium@4344: 	GetTileDesc_Road,        /* get_tile_desc_proc */
rubidium@4344: 	GetTileTrackStatus_Road, /* get_tile_track_status_proc */
rubidium@4344: 	ClickTile_Road,          /* click_tile_proc */
rubidium@4344: 	AnimateTile_Road,        /* animate_tile_proc */
rubidium@4344: 	TileLoop_Road,           /* tile_loop_clear */
rubidium@4344: 	ChangeTileOwner_Road,    /* change_tile_owner_clear */
rubidium@4344: 	NULL,                    /* get_produced_cargo_proc */
rubidium@4344: 	VehicleEnter_Road,       /* vehicle_enter_tile_proc */
rubidium@7335: 	GetFoundation_Road,      /* get_foundation_proc */
rubidium@7494: 	TerraformTile_Road,      /* terraform_tile_proc */
truelight@0: };