Add road stop variables for one-way road info

docs/newgrf-roadstops-nml.html

@@ -119,6 +119,7 @@
 		<tr><td>animation_frame</td><td>0..255</td><td>Animation frame of the current tile</td></tr>
 		<tr><td>waiting_triggers</td><td>0..255</td><td>Waiting triggers</td></tr>
 		<tr><td>random_bits</td><td>0..16777215</td><td>Random bits</td></tr>
+		<tr><td>one_way_info</td><td>RST_OWI_XXX</td><td>One-way road information of drive-through stop tile<br />XXX = TWO_WAY | NORTH_BOUND | SOUTH_BOUND | NO_ENTRY</td></tr>
 	</table>
 	<br />
 	Variables that require one or more parameters:
@@ -142,6 +143,7 @@
 		<tr><td>nearby_tile_view</td><td>x, y offset (-8..7)</td><td>0..5</td><td>The <a href="#roadstop_views">view/rotation</a> of a nearby road stop tile</td></tr>
 		<tr><td>nearby_tile_stop_type</td><td>x, y offset (-8..7)</td><td>RST_TYPE_XXX</td><td>See stop_type</td></tr>
 		<tr><td>nearby_tile_same_stop_type</td><td>x, y offset (-8..7)</td><td>0 | 1</td><td>Is the stop type of a nearby road stop tile the same as this tile?</td></tr>
+		<tr><td>nearby_tile_one_way_info</td><td>x, y offset (-8..7)</td><td>RST_OWI_XXX</td><td>One-way state of nearby drive-through road stop tile</td></tr>
 		<tr><td>nearby_tile_road_stop_info</td><td>x, y offset (-8..7)</td><td></td><td>Above nearby road stop tile variables in one variable (all of variable 0x68)</td></tr>
 		<tr><td>nearby_tile_grfid</td><td>x, y offset (-8..7)</td><td>-1, 0 or a GRFID</td><td>Return value is -1 if the tile is not a road stop, 0 if the tile is a non-custom road stop, or else the GRFID of the NewGRF defining the road stop</td></tr>
 	</table>

docs/newgrf-roadstops.html

@@ -208,6 +208,7 @@
 		<tr><td><a href="#roadstop_company_info">47</a></td><td><a href="#roadstop_company_info">roadstop_company_info</a></td><td>Player/company info</td></tr>
 		<tr><td><a href="https://newgrf-specs.tt-wiki.net/wiki/VariationalAction2/BaseStation">48</a></td><td></td><td>Bitmask of accepted cargoes (BaseStation)</td></tr>
 		<tr><td><a href="#roadstop_animation_frame">49</a></td><td><a href="#roadstop_animation_frame">roadstop_animation_frame</a></td><td>Current animation frame</td></tr>
+		<tr><td><a href="#roadstop_misc_info">50</a></td><td><a href="#roadstop_misc_info">roadstop_misc_info</a></td><td>Miscellaneous info</td></tr>
 		<tr><td><a href="https://newgrf-specs.tt-wiki.net/wiki/VariationalAction2/BaseStation">60</a></td><td></td><td>Amount of cargo waiting (BaseStation)</td></tr>
 		<tr><td><a href="https://newgrf-specs.tt-wiki.net/wiki/VariationalAction2/BaseStation">61</a></td><td></td><td>Time since last cargo pickup (BaseStation)</td></tr>
 		<tr><td><a href="https://newgrf-specs.tt-wiki.net/wiki/VariationalAction2/BaseStation">62</a></td><td></td><td>Rating of cargo (BaseStation)</td></tr>
@@ -269,6 +270,22 @@
 	<h4 id="roadstop_animation_frame">Current animation frame (49, or mappable variable: roadstop_animation_frame)</h4>
 	<p>This has the same value as <a href="https://newgrf-specs.tt-wiki.net/wiki/VariationalAction2/Stations">station (feature 4) variable 4A</a>.</p>
 
+	<h4 id="roadstop_misc_info">Miscellaneous road stop info (50, or mappable variable: roadstop_misc_info)</h4>
+	<p>The town used is the one associated with the station/waypoint (this is in the station/waypoint name by default).
+	<table>
+	<tr><th>Bits</th><th>Meaning</th></tr>
+	<tr><td>0 - 1</td><td>
+		One-way road information:<br />
+		0 - Two-way traffic<br />
+		1 - North-bound only<br />
+		2 - South-bound only<br />
+		3 - No entry
+	</td></tr>
+	</table>
+	<br />
+	The remaining bits are reserved for future use and should be masked.
+	</p>
+
 	<h4 id="roadstop_animation_frame_nearby_tiles">Animation frame of nearby tile (66, or mappable variable: roadstop_animation_frame_nearby_tiles)</h4>
 	<p>This has the same value as <a href="https://newgrf-specs.tt-wiki.net/wiki/VariationalAction2/Stations#Animation_frame_of_nearby_tile_.2866.29">station (feature 4) variable 66</a>.</p>
 
@@ -295,6 +312,12 @@
 		2 - Road waypoint
 	</td></tr>
 	<tr><td>20</td><td>Set if the stop type (passenger/bus, freight/lorry or road waypoint) is the same as the current tile</td></tr>
+	<tr><td>21 - 22</td><td>
+		One-way road information of the selected tile:<br />
+		0 - Two-way traffic<br />
+		1 - North-bound only<br />
+		2 - South-bound only<br />
+		3 - No entry
 	</table>
 	<br />
 	The remaining bits are reserved for future use and should be masked.

src/newgrf_extension.cpp

@@ -120,6 +120,7 @@ extern const GRFVariableMapDefinition _grf_action2_remappable_variables[] = {
 	GRFVariableMapDefinition(GSF_ROADSTOPS, 0x46, "roadstop_town_distance_squared"),
 	GRFVariableMapDefinition(GSF_ROADSTOPS, 0x47, "roadstop_company_info"),
 	GRFVariableMapDefinition(GSF_ROADSTOPS, 0x49, "roadstop_animation_frame"),
+	GRFVariableMapDefinition(GSF_ROADSTOPS, 0x50, "roadstop_misc_info"),
 	GRFVariableMapDefinition(GSF_ROADSTOPS, 0x66, "roadstop_animation_frame_nearby_tiles"),
 	GRFVariableMapDefinition(GSF_ROADSTOPS, 0x67, "roadstop_land_info_nearby_tiles"),
 	GRFVariableMapDefinition(GSF_ROADSTOPS, 0x68, "roadstop_road_stop_info_nearby_tiles"),

src/newgrf_roadstop.cpp

@@ -121,6 +121,15 @@ uint32 RoadStopScopeResolver::GetVariable(uint16 variable, uint32 parameter, Get
 		/* Animation frame */
 		case 0x49: return this->tile == INVALID_TILE ? 0 : this->st->GetRoadStopAnimationFrame(this->tile);
 
+		/* Misc info */
+		case 0x50: {
+			uint32 result = 0;
+			if (this->tile != INVALID_TILE) {
+				if (IsDriveThroughStopTile(this->tile)) result |= GetDriveThroughStopDisallowedRoadDirections(this->tile);
+			}
+			return result;
+		}
+
 		/* Variables which use the parameter */
 		/* Variables 0x60 to 0x65 and 0x69 are handled separately below */
 
@@ -160,6 +169,9 @@ uint32 RoadStopScopeResolver::GetVariable(uint16 variable, uint32 parameter, Get
 				const RoadStopSpecList ssl = BaseStation::GetByTile(nearby_tile)->roadstop_speclist[GetCustomRoadStopSpecIndex(nearby_tile)];
 				res |= 1 << (ssl.grfid != grfid ? 9 : 8) | ssl.localidx;
 			}
+			if (IsDriveThroughStopTile(nearby_tile)) {
+				res |= (GetDriveThroughStopDisallowedRoadDirections(nearby_tile) << 21);
+			}
 			return res;
 		}
 

src/table/newgrf_debug_data.h

@@ -1391,6 +1391,7 @@ static const NIVariable _nif_roadstops[] = {
 	NIV(0x47, "player info"),
 	NIV(0x48, "bitmask of accepted cargoes"),
 	NIV(0x49, "current animation frame"),
+	NIV(0x50, "miscellaneous info"),
 	NIV(0x60, "amount of cargo waiting"),
 	NIV(0x61, "time since last cargo pickup"),
 	NIV(0x62, "rating of cargo"),