cpp/openttd-patchpack/source Changeset - r7641:2b26b5be3fd7

Changeset - r7641:2b26b5be3fd7

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0 13 1

rubidium - 17 years ago 2007-09-26 16:12:43
rubidium@openttd.org

(svn r11172) -Codechange: rewrite of town road building and addition of the possibility to clean up unconnected road bits during the local road reconstructions. Based on a patch by skidd13.

14 files changed with 389 insertions and 162 deletions:

projects/openttd.vcproj

projects/openttd_vs80.vcproj

source.list

src/direction.h

src/lang/english.txt

src/map.h

src/road.cpp

src/road.h

src/road_cmd.cpp

101

src/saveload.cpp

src/settings.cpp

src/settings_gui.cpp

src/town_cmd.cpp

141

121

src/variables.h

0 comments (0 inline, 0 general)

projects/openttd.vcproj

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@@ @@ -327,6 +327,9 @@ @@
 				RelativePath=".\..\src\rev.cpp">
 			</File>
 			<File
 				RelativePath=".\..\src\road.cpp">
 			</File>
 			<File
 				RelativePath=".\..\src\saveload.cpp">
 			</File>
 			<File

projects/openttd_vs80.vcproj

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Show inline comments

@@ @@ -668,6 +668,10 @@ @@
+				>
 			</File>
 			<File
 				RelativePath=".\..\src\road.cpp"
+				>
 			</File>
 			<File
 				RelativePath=".\..\src\saveload.cpp"
+				>
 			</File>

source.list

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Show inline comments

@@ @@ -58,6 +58,7 @@ players.cpp @@
 queue.cpp
 rail.cpp
 rev.cpp
 road.cpp
 saveload.cpp
 screenshot.cpp
 #if SDL

src/direction.h

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@@ @@ -165,6 +165,9 @@ enum DiagDirDiff { @@
 	DIAGDIRDIFF_90LEFT  = 3         ///< 90 degrees left
 };
 /** Allow incrementing of DiagDirDiff variables */
 DECLARE_POSTFIX_INCREMENT(DiagDirDiff);
 /**
  * Applies a difference on a DiagDirection
+ *

src/lang/english.txt

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@@ @@ -1187,6 +1187,7 @@ STR_CONFIG_PATCHES_TOWN_GROWTH_VERY_FAST @@
 STR_CONFIG_PATCHES_LARGER_TOWNS                                 :{LTBLUE}Proportion of towns that will become cities: {ORANGE}1 in {STRING1}
 STR_CONFIG_PATCHES_LARGER_TOWNS_DISABLED                        :{LTBLUE}Proportion of towns that will become cities: {ORANGE}None
 STR_CONFIG_PATCHES_CITY_SIZE_MULTIPLIER                         :{LTBLUE}Initial city size multiplier: {ORANGE}{STRING1}
 STR_CONFIG_MODIFIED_ROAD_REBUILD                                :{LTBLUE}Remove absurd road-elements during the road construction
 STR_CONFIG_PATCHES_GUI                                          :{BLACK}Interface
 STR_CONFIG_PATCHES_CONSTRUCTION                                 :{BLACK}Construction

src/map.h

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@@ @@ -390,6 +390,18 @@ static inline TileIndexDiff TileOffsByDi @@
+}
 /**
  * Adds a DiagDir to a tile.
+ *
  * @param tile The current tile
  * @param dir The direction in which we want to step
  * @return the moved tile
  */
 static inline TileIndex TileAddByDiagDir(TileIndex tile, DiagDirection dir)
+{
 	return TILE_ADD(tile, TileOffsByDiagDir(dir));
+}
 /**
  * A callback function type for searching tiles.
+ *
  * @param tile The tile to test

src/road.cpp

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@@ new file 100644 @@
 #include "stdafx.h"
 #include "openttd.h"
 #include "functions.h"
 #include "rail_map.h"
 #include "road.h"
 #include "road_map.h"
 #include "water_map.h"
 #include "macros.h"
 bool IsPossibleCrossing(const TileIndex tile, Axis ax)
+{
 	return (IsTileType(tile, MP_RAILWAY) &&
 		!HasSignals(tile) &&
 		GetTrackBits(tile) == (ax == AXIS_X ?  TRACK_BIT_Y : TRACK_BIT_X) &&
 		GetTileSlope(tile, NULL) == SLOPE_FLAT);
+}
 RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb)
+{
 	for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) {
 		const TileIndex neighbor_tile = TileAddByDiagDir(tile, dir);
 		/* Get the Roadbit pointing to the neighbor_tile */
 		const RoadBits target_rb = DiagDirToRoadBits(dir);
 		/* If the roadbit is in the current plan */
 		if (org_rb & target_rb) {
 			bool connective = false;
 			const RoadBits mirrored_rb = MirrorRoadBits(target_rb);
 			switch (GetTileType(neighbor_tile)) {
 				/* Allways connective ones */
 				case MP_CLEAR: case MP_TREES:
 					connective = true;
 					break;
 				/* The conditionaly connective ones */
 				case MP_TUNNELBRIDGE:
 				case MP_STATION:
 				case MP_ROAD: {
 					const RoadBits neighbor_rb = GetAnyRoadBits(neighbor_tile, ROADTYPE_ROAD) | GetAnyRoadBits(neighbor_tile, ROADTYPE_TRAM);
 					/* Accept only connective tiles */
 					connective = (neighbor_rb & mirrored_rb) || // Neighbor has got the fitting RoadBit
 							COUNTBITS(neighbor_rb) == 1; // Neighbor has got only one Roadbit
 				} break;
 				case MP_RAILWAY:
 					connective = IsPossibleCrossing(neighbor_tile, DiagDirToAxis(dir));
 					break;
 				case MP_WATER:
 					/* Check for real water tile */
 					connective = !IsWater(neighbor_tile);
 					break;
 				/* The defentetly not connective ones */
 				default: break;
+			}
 			/* If the neighbor tile is inconnective remove the planed road connection to it */
 			if (!connective) org_rb ^= target_rb;
+		}
+	}
 	return org_rb;
+}

src/road.h

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@@ @@ -116,6 +116,36 @@ static inline RoadBits ComplementRoadBit @@
+}
 /**
  * Calculate the mirrored RoadBits
+ *
  * Simply move the bits to their new position.
+ *
  * @param r The given RoadBits value
  * @return the mirrored
  */
 static inline RoadBits MirrorRoadBits(RoadBits r)
+{
 	return (RoadBits)(GB(r, 0, 2) << 2 | GB(r, 2, 2));
+}
 /**
  * Calculate rotated RoadBits
+ *
  * Move the Roadbits clockwise til they are in their final position.
+ *
  * @param r The given RoadBits value
  * @param rot The given Rotation angle
  * @return the rotated
  */
 static inline RoadBits RotateRoadBits(RoadBits r, DiagDirDiff rot)
+{
 	for (; rot > (DiagDirDiff)0; rot--){
 		r = (RoadBits)(GB(r, 0, 1) << 3 | GB(r, 1, 3));
+	}
 	return r;
+}
 /**
  * Create the road-part which belongs to the given DiagDirection
+ *
  * This function returns a RoadBits value which belongs to
@@ @@ -130,6 +160,16 @@ static inline RoadBits DiagDirToRoadBits @@
+}
 /**
  * Return if the tile is a valid tile for a crossing.
+ *
  * @note function is overloaded
  * @param tile the curent tile
  * @param ax the axis of the road over the rail
  * @return true if it is a valid tile
  */
 bool IsPossibleCrossing(const TileIndex tile, Axis ax);
 /**
  * Checks whether the trackdir means that we are reversing.
  * @param dir the trackdir to check
  * @return true if it is a reversing road trackdir
@@ @@ -150,6 +190,14 @@ static inline bool IsStraightRoadTrackdi @@
+}
 /**
  * Clean up unneccesary RoadBits of a planed tile.
  * @param tile current tile
  * @param org_rb planed RoadBits
  * @return optimised RoadBits
  */
 RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb);
 /**
  * Is it allowed to remove the given road bits from the given tile?
  * @param tile      the tile to remove the road from
  * @param remove    the roadbits that are going to be removed

src/road_cmd.cpp

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@@ @@ -259,70 +259,121 @@ CommandCost CmdRemoveRoad(TileIndex tile @@
 static const RoadBits _valid_tileh_slopes_road[][15] = {
 	/* set of normal ones */
+	{
 		ROAD_ALL, ROAD_NONE, ROAD_NONE,
 		ROAD_X,   ROAD_NONE, ROAD_NONE,  // 3, 4, 5
 		ROAD_Y,   ROAD_NONE, ROAD_NONE,
 		ROAD_Y,   ROAD_NONE, ROAD_NONE,  // 9, 10, 11
 		ROAD_X,   ROAD_NONE, ROAD_NONE
 		ROAD_ALL,  // SLOPE_FLAT
 		ROAD_NONE, // SLOPE_W
 		ROAD_NONE, // SLOPE_S
 		ROAD_X,    // SLOPE_SW
 		ROAD_NONE, // SLOPE_E
 		ROAD_NONE, // SLOPE_EW
 		ROAD_Y,    // SLOPE_SE
 		ROAD_NONE, // SLOPE_WSE
 		ROAD_NONE, // SLOPE_N
 		ROAD_Y,    // SLOPE_NW
 		ROAD_NONE, // SLOPE_NS
 		ROAD_NONE, // SLOPE_NE
 		ROAD_X,    // SLOPE_ENW
 		ROAD_NONE, // SLOPE_SEN
 		ROAD_NONE  // SLOPE_ELEVATED
 	},
 	/* allowed road for an evenly raised platform */
+	{
 		ROAD_NONE,
 		ROAD_SW | ROAD_NW,
 		ROAD_SW | ROAD_SE,
 		ROAD_Y  | ROAD_SW,
 		ROAD_NONE,         // SLOPE_FLAT
 		ROAD_SW | ROAD_NW, // SLOPE_W
 		ROAD_SW | ROAD_SE, // SLOPE_S
 		ROAD_Y  | ROAD_SW, // SLOPE_SW
 		ROAD_SE | ROAD_NE, // SLOPE_E
 		ROAD_ALL,          // SLOPE_EW
 		ROAD_X  | ROAD_SE, // SLOPE_SE
 		ROAD_ALL,          // SLOPE_WSE
 		ROAD_NW | ROAD_NE, // SLOPE_N
 		ROAD_X  | ROAD_NW, // SLOPE_NW
 		ROAD_ALL,          // SLOPE_NS
 		ROAD_ALL,          // SLOPE_NE
 		ROAD_SE | ROAD_NE, // 4
 		ROAD_ALL,
 		ROAD_X  | ROAD_SE,
 		ROAD_ALL,
 		ROAD_Y  | ROAD_NE, // SLOPE_ENW
 		ROAD_ALL,          // SLOPE_SEN
 		ROAD_ALL           // SLOPE_ELEVATED
 	},
 	/* Singe bits on slopes */
+	{
 		ROAD_ALL,          // SLOPE_FLAT
 		ROAD_NE | ROAD_SE, // SLOPE_W
 		ROAD_NE | ROAD_NW, // SLOPE_S
 		ROAD_NW | ROAD_NE, // 8
 		ROAD_X  | ROAD_NW,
 		ROAD_ALL,
 		ROAD_ALL,
 		ROAD_NE,           // SLOPE_SW
 		ROAD_NW | ROAD_SW, // SLOPE_E
 		ROAD_ALL,          // SLOPE_EW
 		ROAD_NW,           // SLOPE_SE
 		ROAD_ALL,          // SLOPE_WSE
 		ROAD_SE | ROAD_SW, // SLOPE_N
 		ROAD_Y  | ROAD_NE, // 12
 		ROAD_ALL,
 		ROAD_ALL
 		ROAD_SE,           // SLOPE_NW
 		ROAD_ALL,          // SLOPE_NS
 		ROAD_ALL,          // SLOPE_NE
 		ROAD_SW,           // SLOPE_ENW
 		ROAD_ALL,          // SLOPE_SEN
 		ROAD_ALL,          // SLOPE_ELEVATED
 	},
 };
 /**
  * Calculate the costs for roads on slopes
  *  Aside modify the RoadBits to fit on the slopes
+ *
  * @note The RoadBits are modified too!
  * @param tileh The current slope
  * @param pieces The RoadBits we want to add
  * @param existing The existent RoadBits
  * @return The costs for these RoadBits on this slope
  */
 static CommandCost CheckRoadSlope(Slope tileh, RoadBits* pieces, RoadBits existing)
+{
 	RoadBits road_bits;
 	if (IsSteepSlope(tileh)) {
 		/* Force straight roads. */
 		*pieces |= MirrorRoadBits(*pieces);
 	if (IsSteepSlope(tileh)) {
 		/* force full pieces. */
 		*pieces |= (RoadBits)((*pieces & 0xC) >> 2);
 		*pieces |= (RoadBits)((*pieces & 0x3) << 2);
 		if (existing == 0 || existing == *pieces) {
 		if (existing == ROAD_NONE || existing == *pieces) {
 			if (*pieces == ROAD_X || *pieces == ROAD_Y) return _price.terraform;
+		}
 		return CMD_ERROR;
+	}
 	road_bits = *pieces | existing;
 	RoadBits road_bits = *pieces | existing;
 	/* Single bits on slopes.
 	 * We check for the roads that need at least 2 bits */
 	if (_patches.build_on_slopes && !_is_old_ai_player &&
 			existing == ROAD_NONE && COUNTBITS(*pieces) == 1 &&
 			(_valid_tileh_slopes_road[2][tileh] & *pieces) == ROAD_NONE) {
 		return CommandCost(_price.terraform);
+	}
 	/* no special foundation */
-	if ((~_valid_tileh_slopes_road[0][tileh] & road_bits) == 0) {
+	if ((~_valid_tileh_slopes_road[0][tileh] & road_bits) == ROAD_NONE) {
 		/* force that all bits are set when we have slopes */
 		if (tileh != SLOPE_FLAT) *pieces |= _valid_tileh_slopes_road[0][tileh];
 		return CommandCost(); // no extra cost
+	}
 	/* foundation is used. Whole tile is leveled up */
 	if ((~_valid_tileh_slopes_road[1][tileh] & road_bits) == 0) {
 		return CommandCost(existing != 0 ? 0 : _price.terraform);
 	if ((~_valid_tileh_slopes_road[1][tileh] & road_bits) == ROAD_NONE) {
 		return CommandCost(existing != ROAD_NONE ? 0 : _price.terraform);
+	}
 	*pieces |= (RoadBits)((*pieces & 0xC) >> 2);
 	*pieces |= (RoadBits)((*pieces & 0x3) << 2);
 	/* Force straight roads. */
 	*pieces |= MirrorRoadBits(*pieces);
 	/* partly leveled up tile, only if there's no road on that tile */
 	if ((existing == 0 || existing == *pieces) && (tileh == SLOPE_W || tileh == SLOPE_S || tileh == SLOPE_E || tileh == SLOPE_N)) {
 		/* force full pieces. */
 	if ((existing == ROAD_NONE || existing == *pieces) && (tileh == SLOPE_W || tileh == SLOPE_S || tileh == SLOPE_E || tileh == SLOPE_N)) {
 		if (*pieces == ROAD_X || *pieces == ROAD_Y) return _price.terraform;
+	}
 	return CMD_ERROR;
@@ @@ -1182,8 +1233,8 @@ static void TileLoop_Road(TileIndex tile @@
 	if (GetRoadTileType(tile) == ROAD_TILE_DEPOT) return;
 	const Town* t = ClosestTownFromTile(tile, (uint)-1);
 	if (!HasRoadWorks(tile)) {
 		const Town* t = ClosestTownFromTile(tile, (uint)-1);
 		int grp = 0;
 		if (t != NULL) {
@@ @@ -1192,8 +1243,8 @@ static void TileLoop_Road(TileIndex tile @@
 			/* Show an animation to indicate road work */
 			if (t->road_build_months != 0 &&
 					(DistanceManhattan(t->xy, tile) < 8 || grp != 0) &&
 					GetRoadTileType(tile) == ROAD_TILE_NORMAL && (GetAllRoadBits(tile) == ROAD_X || GetAllRoadBits(tile) == ROAD_Y)) {
 				if (GetTileSlope(tile, NULL) == SLOPE_FLAT && EnsureNoVehicleOnGround(tile) && CHANCE16(1, 20)) {
 					GetRoadTileType(tile) == ROAD_TILE_NORMAL && COUNTBITS(GetAllRoadBits(tile)) > 1 ) {
 				if (GetTileSlope(tile, NULL) == SLOPE_FLAT && EnsureNoVehicleOnGround(tile) && CHANCE16(1, 40)) {
 					StartRoadWorks(tile);
 					SndPlayTileFx(SND_21_JACKHAMMER, tile);
@@ @@ -1231,6 +1282,17 @@ static void TileLoop_Road(TileIndex tile @@
+		}
 	} else if (IncreaseRoadWorksCounter(tile)) {
 		TerminateRoadWorks(tile);
 		if (_patches.mod_road_rebuild) {
 			/* Generate a nicer town surface */
 			const RoadBits old_rb = GetAnyRoadBits(tile, ROADTYPE_ROAD);
 			const RoadBits new_rb = CleanUpRoadBits(tile, old_rb);
 			if (old_rb != new_rb) {
 				DoCommand(tile, (old_rb ^ new_rb), t->index, DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_REMOVE_ROAD);
+			}
+		}
 		MarkTileDirtyByTile(tile);
+	}
+}

src/saveload.cpp

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@@ @@ -29,7 +29,7 @@ @@
 #include "strings.h"
 #include <list>
-extern const uint16 SAVEGAME_VERSION = 76;
+extern const uint16 SAVEGAME_VERSION = 77;
 uint16 _sl_version;       ///< the major savegame version identifier
 byte   _sl_minor_version; ///< the minor savegame version, DO NOT USE!

src/settings.cpp

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@@ @@ -1438,6 +1438,7 @@ const SettingDesc _patch_settings[] = { @@
 	SDT_CONDVAR(Patches, town_growth_rate,  SLE_UINT8, 54, SL_MAX_VERSION, 0, MS, 2, 0,   4, 0, STR_CONFIG_PATCHES_TOWN_GROWTH,          NULL),
 	SDT_CONDVAR(Patches, larger_towns,      SLE_UINT8, 54, SL_MAX_VERSION, 0, D0, 4, 0, 255, 1, STR_CONFIG_PATCHES_LARGER_TOWNS,         NULL),
 	SDT_CONDVAR(Patches, initial_city_size, SLE_UINT8, 56, SL_MAX_VERSION, 0, 0,  2, 1,  10, 1, STR_CONFIG_PATCHES_CITY_SIZE_MULTIPLIER, NULL),
 	SDT_CONDBOOL(Patches, mod_road_rebuild,            77, SL_MAX_VERSION, 0, 0, false,         STR_CONFIG_MODIFIED_ROAD_REBUILD,        NULL),
 	/***************************************************************************/
 	/* AI section of the GUI-configure patches window */

src/settings_gui.cpp

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@@ @@ -672,7 +672,6 @@ static const char *_patches_construction @@
 	"drag_signals_density",
 	"oil_refinery_limit",
 	"semaphore_build_before",
 	"town_layout",
 };
 static const char *_patches_stations[] = {
@@ @@ -700,6 +699,8 @@ static const char *_patches_economy[] = @@
 	"ending_year",
 	"smooth_economy",
 	"allow_shares",
 	"town_layout",
 	"mod_road_rebuild",
 	"town_growth_rate",
 	"larger_towns",
 	"initial_city_size",

src/town_cmd.cpp

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@@ @@ -133,18 +133,6 @@ static inline DiagDirection RandomDiagDi @@
+}
 /**
  * Move a TileIndex into a diagonal direction.
+ *
  * @param tile The current tile
  * @param dir The direction in which we want to step
  * @return the moved tile
  */
 static inline TileIndex AddDiagDirToTileIndex(TileIndex tile, DiagDirection dir)
+{
 	return TILE_ADD(tile, TileOffsByDiagDir(dir));
+}
 /**
  * House Tile drawing handler.
  * Part of the tile loop process
  * @param ti TileInfo of the tile to draw
@@ @@ -661,7 +649,7 @@ static RoadBits GetTownRoadBits(TileInde @@
  */
 static bool IsNeighborRoadTile(TileIndex tile, DiagDirection dir, uint dist_multi)
+{
-	static TileIndexDiff tid_lt[3]; ///< lookup table for the used diff values
 	static TileIndexDiff tid_lt[3]; // lookup table for the used diff values
 	tid_lt[0] = TileOffsByDiagDir(ChangeDiagDir(dir, DIAGDIRDIFF_90RIGHT));
 	tid_lt[1] = TileOffsByDiagDir(ChangeDiagDir(dir, DIAGDIRDIFF_90LEFT));
 	tid_lt[2] = TileOffsByDiagDir(ReverseDiagDir(dir));
@@ @@ -681,7 +669,7 @@ static bool IsNeighborRoadTile(TileIndex @@
 		cur += tid_lt[(pos & 1) ? 0 : 1];
 		if (pos & 2) cur += tid_lt[2];
-		cur = (uint)(pos / 4) * cur; ///< Multiply for the fitting distance
 		cur = (uint)(pos / 4) * cur; // Multiply for the fitting distance
 		if (GetTownRoadBits(TILE_ADD(tile, cur)) & DiagDirToRoadBits((pos & 2) ? dir : ReverseDiagDir(dir))) return true;
+	}
 	return false;
@@ @@ -797,7 +785,7 @@ static void LevelTownLand(TileIndex tile @@
 static RoadBits GetTownRoadGridElement(Town* t, TileIndex tile, DiagDirection dir)
+{
 	/* align the grid to the downtown */
-	TileIndexDiffC grid_pos = TileIndexToTileIndexDiffC(t->xy, tile); ///< Vector from downtown to the tile
 	TileIndexDiffC grid_pos = TileIndexToTileIndexDiffC(t->xy, tile); // Vector from downtown to the tile
 	RoadBits rcmd = ROAD_NONE;
 	switch (_patches.town_layout) {
@@ @@ -849,32 +837,110 @@ static RoadBits GetTownRoadGridElement(T @@
+}
 /**
  * Check there are enough neighbor house tiles next to the current tile
  * Grows the town with an extra house.
  *  Check if there are enough neighbor house tiles
  *  next to the current tile. If there are enough
  *  add another house.
+ *
  * @param tile current tile
  * @return true if there are more than 2 house tiles next
  *  to the current one
  * @param t The current town
  * @param tile The target tile for the extra house
  * @return true if an extra house has been added
  */
-static bool AreNeighborsHouseTiles(TileIndex tile)
+static bool GrowTownWithExtraHouse(Town *t, TileIndex tile)
+{
 	uint counter = 0; ///< counts the house neighbor tiles
 	/* We can't look further than that. */
 	if (TileX(tile) < 1 || TileY(tile) < 1) {
 		return false;
 	if (TileX(tile) < 2 || TileY(tile) < 2 || MapMaxX() <= TileX(tile) || MapMaxY() <= TileY(tile)) return false;
 	uint counter = 0; // counts the house neighbor tiles
 	/* Check the tiles E,N,W and S of the current tile for houses */
 	for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) {
 		if (IsTileType(TileAddByDiagDir(tile, dir), MP_HOUSE)) counter++;
 		/* If there are enough neighbors stop here */
 		if (counter >= 3) {
 			if (BuildTownHouse(t, tile)) {
 				_grow_town_result = -1;
 				return true;
+			}
 			return false;
+		}
+	}
 	return false;
+}
 /**
  * Grows the town with a road piece.
+ *
  * @param t The current town
  * @param tile The current tile
  * @param rcmd The RoadBits we want to build on the tile
  * @return true if the RoadBits have been added else false
  */
 static bool GrowTownWithRoad(const Town *t, TileIndex tile, RoadBits rcmd)
+{
 	if (CmdSucceeded(DoCommand(tile, rcmd, t->index, DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_BUILD_ROAD))) {
 		_grow_town_result = -1;
 		return true;
+	}
 	/* Check the tiles E,N,W and S of the current tile. */
 	for (DiagDirection i = DIAGDIR_BEGIN; i < DIAGDIR_END; i++) {
 		if (IsTileType(AddDiagDirToTileIndex(tile, i), MP_HOUSE)) {
 			counter++;
 	return false;
+}
 /**
  * Grows the town with a bridge.
  *  At first we check if a bridge is reasonable.
  *  If so we check if we are able to build it.
+ *
  * @param t The current town
  * @param tile The current tile
  * @param rcmd The RoadBits which are possible on this tile
  * @return true if a bridge has been build else false
  */
 static bool GrowTownWithBridge(const Town *t, TileIndex tile, RoadBits rcmd)
+{
 	DiagDirection bridge_dir; // The direction of a bridge we maybe want to build
 	/* Determine direction of slope,
 	 *  and build a road if not a special slope. */
 	switch (GetTileSlope(tile, NULL)) {
 		case SLOPE_SW: bridge_dir = DIAGDIR_NE; break;
 		case SLOPE_SE: bridge_dir = DIAGDIR_NW; break;
 		case SLOPE_NW: bridge_dir = DIAGDIR_SE; break;
 		case SLOPE_NE: bridge_dir = DIAGDIR_SW; break;
 		default: return false;
+	}
 	/* Check if the bridge will be compatible to the RoadBits */
 	if (!(rcmd & DiagDirToRoadBits(ReverseDiagDir(bridge_dir)))) return false;
 	/* We are in the right direction */
 	uint32 bridge_length = 0;     // This value stores the length of the possible bridge
 	TileIndex bridge_tile = tile; // Used to store the other waterside
 	do {
 		if (bridge_length++ >= 11) {
 			/* Max 11 tile long bridges */
 			return false;
+		}
 		/* If there are enougth neighbor's stop it here */
 		if (counter >= 3) {
 		bridge_tile = TILE_MASK(bridge_tile + TileOffsByDiagDir(bridge_dir));
 	} while (IsClearWaterTile(bridge_tile));
 	/* no water tiles in between? */
 	if (bridge_length == 1) return false;
 	for (uint8 times = 0; times <= 22; times++) {
 		byte bridge_type = RandomRange(MAX_BRIDGES - 1);
 		/* Can we actually build the bridge? */
 		if (CmdSucceeded(DoCommand(tile, bridge_tile, bridge_type | ((0x80 | ROADTYPES_ROAD) << 8), DC_AUTO, CMD_BUILD_BRIDGE))) {
 			DoCommand(tile, bridge_tile, bridge_type | ((0x80 | ROADTYPES_ROAD) << 8), DC_EXEC | DC_AUTO, CMD_BUILD_BRIDGE);
 			_grow_town_result--;
 			return true;
+		}
+	}
 	/* Quit if it selecting an appropiate bridge type fails a large number of times. */
 	return false;
+}
@@ @@ -882,25 +948,24 @@ static bool AreNeighborsHouseTiles(TileI @@
  * Grows the given town.
  * There are at the moment 3 possible way's for
  * the town expansion:
  * @li Generate a random tile and check if there is a road allowed
  * 	@li TL_ORIGINAL
  * 	@li TL_BETTER_ROADS
  * @li Check if the town geometry allows a road and which one
  * 	@li TL_2X2_GRID
  * 	@li TL_3X3_GRID
  * @li Forbid roads, only build houses
  * 	@li TL_NO_ROADS
  *  @li Generate a random tile and check if there is a road allowed
  *  @li TL_ORIGINAL
  *  @li TL_BETTER_ROADS
  *  @li Check if the town geometry allows a road and which one
  *  @li TL_2X2_GRID
  *  @li TL_3X3_GRID
  *  @li Forbid roads, only build houses
  *  @li TL_NO_ROADS
+ *
  * @param tile_ptr The current tile
  * @param cur_rb The current tiles RoadBits
  * @param target_dir The target road dir
  * @param t1 The current town
  */
-static void GrowTownInTile(TileIndex* tile_ptr, RoadBits cur_rb, DiagDirection target_dir, Town* t1)
+static void GrowTownInTile(TileIndex *tile_ptr, RoadBits cur_rb, DiagDirection target_dir, Town *t1)
+{
 	RoadBits rcmd = ROAD_NONE;  ///< RoadBits for the road construction command
 	TileIndex tmptile;          ///< Dummy tile for various things
 	TileIndex tile = *tile_ptr; ///< The main tile on which we base our growth
 	RoadBits rcmd = ROAD_NONE;  // RoadBits for the road construction command
 	TileIndex tile = *tile_ptr; // The main tile on which we base our growth
 	TILE_ASSERT(tile);
@@ @@ -936,14 +1001,14 @@ static void GrowTownInTile(TileIndex* ti @@
 					do target_dir = RandomDiagDir(); while (target_dir == source_dir);
+				}
-				if (!IsRoadAllowedHere(AddDiagDirToTileIndex(tile, target_dir), target_dir)) {
+				if (!IsRoadAllowedHere(TileAddByDiagDir(tile, target_dir), target_dir)) {
 					/* A road is not allowed to continue the randomized road,
 					 *  return if the road we're trying to build is curved. */
 					if (target_dir != ReverseDiagDir(source_dir)) return;
 					/* Return if neither side of the new road is a house */
 					if (!IsTileType(AddDiagDirToTileIndex(tile, ChangeDiagDir(target_dir, DIAGDIRDIFF_90RIGHT)), MP_HOUSE) &&
 							!IsTileType(AddDiagDirToTileIndex(tile, ChangeDiagDir(target_dir, DIAGDIRDIFF_90LEFT)), MP_HOUSE)) {
 					if (!IsTileType(TileAddByDiagDir(tile, ChangeDiagDir(target_dir, DIAGDIRDIFF_90RIGHT)), MP_HOUSE) &&
 							!IsTileType(TileAddByDiagDir(tile, ChangeDiagDir(target_dir, DIAGDIRDIFF_90LEFT)), MP_HOUSE)) {
 						return;
+					}
@@ @@ -955,7 +1020,7 @@ static void GrowTownInTile(TileIndex* ti @@
 				break;
+		}
-	} else if (target_dir < (DiagDirection)5 && !(cur_rb & DiagDirToRoadBits(ReverseDiagDir(target_dir)))) {
+	} else if (target_dir < DIAGDIR_END && !(cur_rb & DiagDirToRoadBits(ReverseDiagDir(target_dir)))) {
 		/* Continue building on a partial road.
 		 * Should be allways OK, so we only generate
 		 * the fitting RoadBits */
@@ @@ -978,8 +1043,7 @@ static void GrowTownInTile(TileIndex* ti @@
 				break;
+		}
 	} else {
 		bool allow_house = false; ///< Value which decides if we want to construct a house
 		TileIndex tmptile2;       ///< Yet another dummy tile
 		bool allow_house = false; // Value which decides if we want to construct a house
 		/* Reached a tunnel/bridge? Then continue at the other side of it. */
 		if (IsTileType(tile, MP_TUNNELBRIDGE)) {
@@ @@ -997,10 +1061,10 @@ static void GrowTownInTile(TileIndex* ti @@
 		if (cur_rb & DiagDirToRoadBits(target_dir)) return;
 		/* This is the tile we will reach if we extend to this direction. */
-		tmptile = AddDiagDirToTileIndex(tile, target_dir);
+		TileIndex house_tile = TileAddByDiagDir(tile, target_dir); // position of a possible house
 		/* Don't walk into water. */
-		if (IsClearWaterTile(tmptile)) return;
+		if (IsClearWaterTile(house_tile)) return;
 		switch (_patches.town_layout) {
 			default: NOT_REACHED();
@@ @@ -1010,41 +1074,35 @@ static void GrowTownInTile(TileIndex* ti @@
 				break;
 			case TL_3X3_GRID: /* Use 2x2 grid afterwards! */
 				/* Fill gap if house has enougth neighbors */
 				tmptile2 = AddDiagDirToTileIndex(tmptile, target_dir);
 				if (AreNeighborsHouseTiles(tmptile2) && BuildTownHouse(t1, tmptile2)) {
 					_grow_town_result = -1;
+				}
 				GrowTownWithExtraHouse(t1, TileAddByDiagDir(house_tile, target_dir));
 				/* FALL THROUGH */
 			case TL_2X2_GRID:
-				rcmd = GetTownRoadGridElement(t1, tmptile, target_dir);
+				rcmd = GetTownRoadGridElement(t1, house_tile, target_dir);
 				allow_house = (rcmd == ROAD_NONE);
 				break;
 			case TL_BETTER_ROADS: /* Use original afterwards! */
 				/* Fill gap if house has enougth neighbors */
 				tmptile2 = AddDiagDirToTileIndex(tmptile, target_dir);
 				if (AreNeighborsHouseTiles(tmptile2) && BuildTownHouse(t1, tmptile2)) {
 					_grow_town_result = -1;
+				}
 				GrowTownWithExtraHouse(t1, TileAddByDiagDir(house_tile, target_dir));
 				/* FALL THROUGH */
 			case TL_ORIGINAL:
 				 /* Allow a house at the edge. 60% chance or
 				  * always ok if no road allowed. */
 				rcmd = DiagDirToRoadBits(target_dir);
-				allow_house = (!IsRoadAllowedHere(tmptile, target_dir) || CHANCE16(6, 10));
+				allow_house = (!IsRoadAllowedHere(house_tile, target_dir) || CHANCE16(6, 10));
 				break;
+		}
 		if (allow_house) {
 			/* Build a house, but not if there already is a house there. */
-			if (!IsTileType(tmptile, MP_HOUSE)) {
+			if (!IsTileType(house_tile, MP_HOUSE)) {
 				/* Level the land if possible */
-				LevelTownLand(tmptile);
+				LevelTownLand(house_tile);
 				/* And build a house.
 				 * Set result to -1 if we managed to build it. */
-				if (BuildTownHouse(t1, tmptile)) {
+				if (BuildTownHouse(t1, house_tile)) {
 					_grow_town_result = -1;
+				}
+			}
@@ @@ -1057,51 +1115,13 @@ static void GrowTownInTile(TileIndex* ti @@
 	/* Return if a water tile */
 	if (IsClearWaterTile(tile)) return;
 	DiagDirection bridge_dir; ///< The direction of a bridge we maybe want to build
 	/* Determine direction of slope,
 	 *  and build a road if not a special slope. */
 	switch (GetTileSlope(tile, NULL)) {
 		case SLOPE_SW: bridge_dir = DIAGDIR_NE; break;
 		case SLOPE_SE: bridge_dir = DIAGDIR_NW; break;
 		case SLOPE_NW: bridge_dir = DIAGDIR_SE; break;
 		case SLOPE_NE: bridge_dir = DIAGDIR_SW; break;
 		default:
 build_road_and_exit:
 			if (CmdSucceeded(DoCommand(tile, rcmd, t1->index, DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_BUILD_ROAD))) {
 				_grow_town_result = -1;
+			}
 			return;
+	}
 	/* Check if the bridge is in the right direction */
 	if (!(rcmd & DiagDirToRoadBits(bridge_dir))) goto build_road_and_exit;
 	/* We are in the right direction */
 	uint32 bridge_length = 0; ///< This value stores the length of the possible bridge
 	tmptile = tile;           ///< Now we use this dummy to store the other waterside
 	do {
 		if (bridge_length++ >= 11) {
 			/* Max 11 tile long bridges */
 			goto build_road_and_exit;
+		}
 		tmptile = TILE_MASK(tmptile + TileOffsByDiagDir(bridge_dir));
 	} while (IsClearWaterTile(tmptile));
 	/* no water tiles in between? */
 	if (bridge_length == 1) goto build_road_and_exit;
 	for (uint times = 0; times <= 22; times++) {
 		byte bridge_type = RandomRange(MAX_BRIDGES - 1);
 		/* Can we actually build the bridge? */
 		if (CmdSucceeded(DoCommand(tile, tmptile, bridge_type | ((0x80 | ROADTYPES_ROAD) << 8), DC_AUTO, CMD_BUILD_BRIDGE))) {
 			DoCommand(tile, tmptile, bridge_type | ((0x80 | ROADTYPES_ROAD) << 8), DC_EXEC | DC_AUTO, CMD_BUILD_BRIDGE);
 			_grow_town_result = -1;
 			return;
+		}
+	}
 	/* Quit if it selecting an appropiate bridge type fails a large number of times. */
 	/* Make the roads look nicer */
 	rcmd = CleanUpRoadBits(tile, rcmd);
 	if (rcmd == ROAD_NONE) return;
 	if (GrowTownWithBridge(t1, tile, rcmd)) return;
 	GrowTownWithRoad(t1, tile, rcmd);
+}
 /** Returns "growth" if a house was built, or no if the build failed.
@@ @@ -1114,7 +1134,7 @@ static int GrowTownAtRoad(Town *t, TileI @@
 	/* Special case.
 	 * @see GrowTownInTile Check the else if
 	 */
-	DiagDirection target_dir = (DiagDirection)5; ///< The direction in which we want to extend the town
+	DiagDirection target_dir = DIAGDIR_END; // The direction in which we want to extend the town
 	TILE_ASSERT(tile);
@@ @@ -1137,7 +1157,7 @@ static int GrowTownAtRoad(Town *t, TileI @@
+	}
 	do {
-		RoadBits cur_rb = GetTownRoadBits(tile); ///< The RoadBits of the current tile
 		RoadBits cur_rb = GetTownRoadBits(tile); // The RoadBits of the current tile
 		/* Try to grow the town from this point */
 		GrowTownInTile(&tile, cur_rb, target_dir, t);
@@ @@ -1151,7 +1171,7 @@ static int GrowTownAtRoad(Town *t, TileI @@
 		/* Select a random bit from the blockmask, walk a step
 		 * and continue the search from there. */
 		do target_dir = RandomDiagDir(); while (!(cur_rb & DiagDirToRoadBits(target_dir)));
-		tile = AddDiagDirToTileIndex(tile, target_dir);
+		tile = TileAddByDiagDir(tile, target_dir);
 		if (IsTileType(tile, MP_ROAD)) {
 			/* Don't allow building over roads of other cities */
@@ @@ -1220,7 +1240,7 @@ static bool GrowTown(Town *t) @@
 	PlayerID old_player = _current_player;
 	_current_player = OWNER_TOWN;
-	TileIndex tile = t->xy; ///< The tile we are working with ATM
 	TileIndex tile = t->xy; // The tile we are working with ATM
 	/* Find a road that we can base the construction on. */
 	for (ptr = _town_coord_mod; ptr != endof(_town_coord_mod); ++ptr) {
@@ @@ -2110,8 +2130,8 @@ static void UpdateTownGrowRate(Town *t) @@
 	/** Towns are processed every TOWN_GROWTH_FREQUENCY ticks, and this is the
 	 * number of times towns are processed before a new building is built. */
 	static const uint16 _grow_count_values[2][6] = {
 		{ 120, 120, 120, 100,  80,  60 }, ///< Fund new buildings has been activated
 		{ 320, 420, 300, 220, 160, 100 }  ///< Normal values
 		{ 120, 120, 120, 100,  80,  60 }, // Fund new buildings has been activated
 		{ 320, 420, 300, 220, 160, 100 }  // Normal values
 	};
 	if (t->fund_buildings_months != 0) {
@@ @@ -2252,9 +2272,9 @@ void ChangeTownRating(Town *t, int add, @@
 /* penalty for removing town-owned stuff */
 static const int _default_rating_settings [3][3] = {
 	/* ROAD_REMOVE, TUNNELBRIDGE_REMOVE, INDUSTRY_REMOVE */
 	{  0, 128, 384}, ///< Permissive
 	{ 48, 192, 480}, ///< Neutral
 	{ 96, 384, 768}, ///< Hostile
 	{  0, 128, 384}, // Permissive
 	{ 48, 192, 480}, // Neutral
 	{ 96, 384, 768}, // Hostile
 };
 bool CheckforTownRating(uint32 flags, Town *t, byte type)

src/variables.h

➞

Show inline comments

@@ @@ -242,6 +242,8 @@ struct Patches { @@
 	bool timetable_in_ticks; ///< Whether to show the timetable in ticks rather than days.
 	bool autoslope;          ///< Allow terraforming under things.
 	bool mod_road_rebuild;   ///< Roadworks remove unneccesary RoadBits
 };
 VARDEF Patches _patches;

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