cpp/openttd-patchpack/source Changeset - r27976:645fcc9c218c

Changeset - r27976:645fcc9c218c

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Peter Nelson - 7 months ago 2023-09-30 11:30:25
peter1138@openttd.org

Change: Store station blocked/wires/pylons flags in map. (#11337)

This stores three flags in unused map bits, and avoids having to look up
station graphics and custom station specs to determine blocked/wires/pylons
status.

This potentially affects rail pathfinding performance.

Savegame version is not bumped, as the flags can just be updated every
time.

8 files changed with 124 insertions and 51 deletions:

docs/landscape.html

docs/landscape_grid.html

src/newgrf_station.cpp

src/saveload/afterload.cpp

src/station_cmd.cpp

src/station_func.h

src/station_map.h

src/waypoint_cmd.cpp

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docs/landscape.html

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@@ @@ -989,8 +989,11 @@ @@
        </tr>
       </table>
      </li>
      <li>m6 bit 7: rail station / waypoint may have catenary pylons</li>
      <li>m6 bit 6: rail station / waypoint may have catenary wires</li>
      <li>m6 bits 5..3: the station type (rail, airport, truck, bus, oilrig, dock, buoy, waypoint)</li>
      <li>m6 bit 2: pbs reservation state for railway stations/waypoints</li>
      <li>m6 bit 0: rail station / waypoint is blocked</li>
      <li>m7 bits 4..0: <a href="#OwnershipInfo">owner</a> of road (road stops)</li>
      <li>m7: animation frame (railway stations/waypoints, airports)</li>

docs/landscape_grid.html

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@@ @@ -188,7 +188,7 @@ the array so you can quickly see what is @@
       <td class="bits" rowspan=2><span class="used" title="Random bits">XXXX</span> <span class="free">OOOO</span></td>
       <td class="bits" rowspan=2><span class="used" title="Custom station specifications ID">XXXX XXXX</span></td>
       <td class="bits"><span class="used" title="Graphics index">XXXX XXXX</span></td>
-      <td class="bits" rowspan=2><span class="free">OO</span><span class="used" title="Station type">XXX</span> <span class="used" title="Reserved track">X</span><span class="free">OO</span></td>
+      <td class="bits" rowspan=2><span class="used" title="May have pylons">X</span><span class="used" title="May have wires">X</span><span class="used" title="Station type">XXX</span> <span class="used" title="Reserved track">X</span><span class="free">O</span><span class="used" title="Tile is blocked">X</span></td>
       <td class="bits" rowspan=2><span class="used" title="Animation frame">XXXX XXXX</span></td>
       <td class="bits" rowspan=2><span class="free">OOOO OOOO OO</span><span class="used" title="Railway type">XX XXXX</span></td>
     </tr>

src/newgrf_station.cpp

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@@ @@ -840,46 +840,6 @@ const StationSpec *GetStationSpec(TileIn @@
 	return specindex < st->speclist.size() ? st->speclist[specindex].spec : nullptr;
+}
 /**
  * Check whether a rail station tile is NOT traversable.
  * @param tile %Tile to test.
  * @return Station tile is blocked.
  * @note This could be cached (during build) in the map array to save on all the dereferencing.
  */
 bool IsStationTileBlocked(TileIndex tile)
+{
 	const StationSpec *statspec = GetStationSpec(tile);
 	return statspec != nullptr && HasBit(statspec->blocked, GetStationGfx(tile));
+}
 /**
  * Check if a rail station tile shall have pylons when electrified.
  * @param tile %Tile to test.
  * @return Tile shall have pylons.
  * @note This could be cached (during build) in the map array to save on all the dereferencing.
  */
 bool CanStationTileHavePylons(TileIndex tile)
+{
 	const StationSpec *statspec = GetStationSpec(tile);
 	uint gfx = GetStationGfx(tile);
 	/* Default stations do not draw pylons under roofs (gfx >= 4) */
 	return statspec != nullptr ? HasBit(statspec->pylons, gfx) : gfx < 4;
+}
 /**
  * Check if a rail station tile shall have wires when electrified.
  * @param tile %Tile to test.
  * @return Tile shall have wires.
  * @note This could be cached (during build) in the map array to save on all the dereferencing.
  */
 bool CanStationTileHaveWires(TileIndex tile)
+{
 	const StationSpec *statspec = GetStationSpec(tile);
 	return statspec == nullptr || !HasBit(statspec->wires, GetStationGfx(tile));
+}
 /** Wrapper for animation control, see GetStationCallback. */
 uint16_t GetAnimStationCallback(CallbackID callback, uint32_t param1, uint32_t param2, const StationSpec *statspec, BaseStation *st, TileIndex tile, int)
+{

src/saveload/afterload.cpp

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@@ @@ -47,6 +47,7 @@ @@
 #include "../subsidy_base.h"
 #include "../subsidy_func.h"
 #include "../newgrf.h"
 #include "../newgrf_station.h"
 #include "../engine_func.h"
 #include "../rail_gui.h"
 #include "../core/backup_type.hpp"
@@ @@ -2856,6 +2857,26 @@ bool AfterLoadGame() @@
 		_settings_game.script.settings_profile = IsInsideMM(_old_diff_level, SP_BEGIN, SP_END) ? _old_diff_level : (uint)SP_MEDIUM;
+	}
+	{
 		/* Station blocked, wires and pylon flags need to be stored in the map. This is effectively cached data, so no
 		 * version check is necessary. This is done here as the SLV_182 check below needs the blocked status. */
 		for (auto t : Map::Iterate()) {
 			if (HasStationTileRail(t)) {
 				StationGfx gfx = GetStationGfx(t);
 				const StationSpec *statspec = GetStationSpec(t);
 				bool blocked = statspec != nullptr && HasBit(statspec->blocked, gfx);
 				/* Default stations do not draw pylons under roofs (gfx >= 4) */
 				bool pylons = statspec != nullptr ? HasBit(statspec->pylons, gfx) : gfx < 4;
 				bool wires = statspec == nullptr || !HasBit(statspec->wires, gfx);
 				SetStationTileBlocked(t, blocked);
 				SetStationTileHavePylons(t, pylons);
 				SetStationTileHaveWires(t, wires);
+			}
+		}
+	}
 	if (IsSavegameVersionBefore(SLV_182)) {
 		/* Aircraft acceleration variable was bonkers */
 		for (Aircraft *v : Aircraft::Iterate()) {

src/station_cmd.cpp

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@@ @@ -1466,7 +1466,18 @@ CommandCost CmdBuildRailStation(DoComman @@
 				SetStationTileRandomBits(tile, GB(Random(), 0, 4));
 				SetAnimationFrame(tile, 0);
 				if (!IsStationTileBlocked(tile)) c->infrastructure.rail[rt]++;
 				/* Should be the same as layout but axis component could be wrong... */
 				StationGfx gfx = GetStationGfx(tile);
 				bool blocked = statspec != nullptr && HasBit(statspec->blocked, gfx);
 				/* Default stations do not draw pylons under roofs (gfx >= 4) */
 				bool pylons = statspec != nullptr ? HasBit(statspec->pylons, gfx) : gfx < 4;
 				bool wires = statspec == nullptr || !HasBit(statspec->wires, gfx);
 				SetStationTileBlocked(tile, blocked);
 				SetStationTileHavePylons(tile, pylons);
 				SetStationTileHaveWires(tile, wires);
 				if (!blocked) c->infrastructure.rail[rt]++;
 				c->infrastructure.station++;
 				if (statspec != nullptr) {

src/station_func.h

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@@ @@ -43,12 +43,6 @@ void UpdateStationDockingTiles(Station * @@
 void RemoveDockingTile(TileIndex t);
 void ClearDockingTilesCheckingNeighbours(TileIndex tile);
 /* Check if a rail station tile is traversable. */
 bool IsStationTileBlocked(TileIndex tile);
 bool CanStationTileHavePylons(TileIndex tile);
 bool CanStationTileHaveWires(TileIndex tile);
 void UpdateAirportsNoise();
 bool SplitGroundSpriteForOverlay(const TileInfo *ti, SpriteID *ground, RailTrackOffset *overlay_offset);

src/station_map.h

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@@ @@ -330,6 +330,78 @@ static inline bool IsHangarTile(Tile t) @@
+}
 /**
  * Is tile \a t a blocked tile?
  * @pre HasStationRail(t)
  * @param t Tile to check
  * @return \c true if the tile is blocked
  */
 static inline bool IsStationTileBlocked(Tile t)
+{
 	assert(HasStationRail(t));
 	return HasBit(t.m6(), 0);
+}
 /**
  * Set the blocked state of the rail station
  * @pre HasStationRail(t)
  * @param t the station tile
  * @param b the blocked state
  */
 static inline void SetStationTileBlocked(Tile t, bool b)
+{
 	assert(HasStationRail(t));
 	SB(t.m6(), 0, 1, b ? 1 : 0);
+}
 /**
  * Can tile \a t have catenary wires?
  * @pre HasStationRail(t)
  * @param t Tile to check
  * @return \c true if the tile can have catenary wires
  */
 static inline bool CanStationTileHaveWires(Tile t)
+{
 	assert(HasStationRail(t));
 	return HasBit(t.m6(), 6);
+}
 /**
  * Set the catenary wires state of the rail station
  * @pre HasStationRail(t)
  * @param t the station tile
  * @param b the catenary wires state
  */
 static inline void SetStationTileHaveWires(Tile t, bool b)
+{
 	assert(HasStationRail(t));
 	SB(t.m6(), 6, 1, b ? 1 : 0);
+}
 /**
  * Can tile \a t have catenary pylons?
  * @pre HasStationRail(t)
  * @param t Tile to check
  * @return \c true if the tile can have catenary pylons
  */
 static inline bool CanStationTileHavePylons(Tile t)
+{
 	assert(HasStationRail(t));
 	return HasBit(t.m6(), 7);
+}
 /**
  * Set the catenary pylon state of the rail station
  * @pre HasStationRail(t)
  * @param t the station tile
  * @param b the catenary pylons state
  */
 static inline void SetStationTileHavePylons(Tile t, bool b)
+{
 	assert(HasStationRail(t));
 	SB(t.m6(), 7, 1, b ? 1 : 0);
+}
 /**
  * Get the rail direction of a rail station.
  * @param t Tile to query
  * @pre HasStationRail(t)
@@ @@ -379,10 +451,10 @@ static inline TrackBits GetRailStationTr @@
 static inline bool IsCompatibleTrainStationTile(Tile test_tile, Tile station_tile)
+{
 	assert(IsRailStationTile(station_tile));
 	return IsRailStationTile(test_tile) && IsCompatibleRail(GetRailType(test_tile), GetRailType(station_tile)) &&
 	return IsRailStationTile(test_tile) && !IsStationTileBlocked(test_tile) &&
 			IsCompatibleRail(GetRailType(test_tile), GetRailType(station_tile)) &&
 			GetRailStationAxis(test_tile) == GetRailStationAxis(station_tile) &&
 			GetStationIndex(test_tile) == GetStationIndex(station_tile) &&
 			!IsStationTileBlocked(test_tile);
 			GetStationIndex(test_tile) == GetStationIndex(station_tile);
+}
 /**

src/waypoint_cmd.cpp

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@@ @@ -277,6 +277,18 @@ CommandCost CmdBuildRailWaypoint(DoComma @@
 					HasStationReservation(tile);
 			MakeRailWaypoint(tile, wp->owner, wp->index, axis, layout_ptr[i], GetRailType(tile));
 			SetCustomStationSpecIndex(tile, map_spec_index);
 			/* Should be the same as layout but axis component could be wrong... */
 			StationGfx gfx = GetStationGfx(tile);
 			bool blocked = spec != nullptr && HasBit(spec->blocked, gfx);
 			/* Default stations do not draw pylons under roofs (gfx >= 4) */
 			bool pylons = spec != nullptr ? HasBit(spec->pylons, gfx) : gfx < 4;
 			bool wires = spec == nullptr || !HasBit(spec->wires, gfx);
 			SetStationTileBlocked(tile, blocked);
 			SetStationTileHavePylons(tile, pylons);
 			SetStationTileHaveWires(tile, wires);
 			SetRailStationReservation(tile, reserved);
 			MarkTileDirtyByTile(tile);

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