Add town variable for town tile X and Y coordinates

docs/newgrf-town-nml.html

@@ -51,6 +51,8 @@
 		<tr><td>town_zone_2_radius_square_uncapped</td><td>0..4294967295</td><td>Town zone 2 radius squared (not clamped to 0xFFFF)</td><td><font face="monospace">town_uncapped_variables</font>, version 1</td></tr>
 		<tr><td>town_zone_3_radius_square_uncapped</td><td>0..4294967295</td><td>Town zone 3 radius squared (not clamped to 0xFFFF)</td><td><font face="monospace">town_uncapped_variables</font>, version 1</td></tr>
 		<tr><td>town_zone_4_radius_square_uncapped</td><td>0..4294967295</td><td>Town zone 4 radius squared (not clamped to 0xFFFF)</td><td><font face="monospace">town_uncapped_variables</font>, version 1</td></tr>
+		<tr><td>x_coordinate</td><td>0..65535</td><td>X coordinate of town tile</td><td><font face="monospace">varaction2_towns_town_xy</font>, version 1</td></tr>
+		<tr><td>y_coordinate</td><td>0..65535</td><td>Y coordinate of town tile</td><td><font face="monospace">varaction2_towns_town_xy</font>, version 1</td></tr>
 	</table>
 
 	<h3 id="town_generic_callbacks">Town Generic Callbacks</h3>

docs/newgrf-town.html

@@ -54,6 +54,7 @@
 		<tr><td><a href="#town_zone_N_radius_square">town_zone_2_radius_square</a></td><td>Town zone 2 radius squared</td></tr>
 		<tr><td><a href="#town_zone_N_radius_square">town_zone_3_radius_square</a></td><td>Town zone 3 radius squared</td></tr>
 		<tr><td><a href="#town_zone_N_radius_square">town_zone_4_radius_square</a></td><td>Town zone 4 radius squared</td></tr>
+		<tr><td><a href="#town_xy">town_xy</a></td><td>Town tile X and Y coordinates</td></tr>
 	</table>
 
 	<h4 id="town_house_count">Number of town house (mappable variable: town_house_count)</h4>
@@ -68,6 +69,16 @@
 	<p>This is the same as <a href="https://newgrf-specs.tt-wiki.net/wiki/VariationalAction2/Towns">town variables 94, 96, 98, 9A, 9C</a>, except 32 bits and not clamped to a maximum value of 0xFFFF.</p>
 	<p>This requires <font face="monospace">town_uncapped_variables</font>, version 1.</p>
 
+	<h4 id="town_xy">Town tile X and Y coordinates (mappable variable: town_xy)</h4>
+	<table>
+	<tr><th>Bits</th><th>Meaning</th></tr>
+	<tr><td>0 - 15</td><td>X coordinate of town tile</td></tr>
+	<tr><td>16 - 31</td><td>Y coordinate of town tile</td></tr>
+	</table>
+	<p>This is similar to town variable 80, except the Y part is in the upper 16 bits and the X part is in the lower 16 bits.</p>
+	<p>This is the same format as <a href="https://newgrf-specs.tt-wiki.net/wiki/VariationalAction2/Houses#XY_Coordinate_of_the_building_.2847.29">house variable 47</a>.</p>
+	<p>This requires <font face="monospace">varaction2_towns_town_xy</font>, version 1.</p>
+
 	<br />
 
 	<h3 id="a3town">Action 3 - Town</h3>

src/newgrf_extension.cpp

@@ -67,6 +67,7 @@ extern const GRFFeatureInfo _grf_feature_list[] = {
 	GRFFeatureInfo("town_feature", 1),
 	GRFFeatureInfo("town_uncapped_variables", 1),
 	GRFFeatureInfo("town_zone_callback", 1, GFTOF_TOWN_ZONE_CALLBACK),
+	GRFFeatureInfo("varaction2_towns_town_xy", 1),
 	GRFFeatureInfo("more_varaction2_types", 1, GFTOF_MORE_VARACTION2_TYPES),
 	GRFFeatureInfo("multi_part_ships", 1, GFTOF_MULTI_PART_SHIPS),
 	GRFFeatureInfo(),
@@ -182,6 +183,7 @@ extern const GRFVariableMapDefinition _grf_action2_remappable_variables[] = {
 	GRFVariableMapDefinition(GSF_FAKE_TOWNS, A2VRI_TOWNS_ZONE_2, "town_zone_2_radius_square"),
 	GRFVariableMapDefinition(GSF_FAKE_TOWNS, A2VRI_TOWNS_ZONE_3, "town_zone_3_radius_square"),
 	GRFVariableMapDefinition(GSF_FAKE_TOWNS, A2VRI_TOWNS_ZONE_4, "town_zone_4_radius_square"),
+	GRFVariableMapDefinition(GSF_FAKE_TOWNS, A2VRI_TOWNS_XY, "town_xy"),
 	GRFVariableMapDefinition(GSF_NEWLANDSCAPE, 0x40, "newlandscape_terrain_type"),
 	GRFVariableMapDefinition(GSF_NEWLANDSCAPE, 0x41, "newlandscape_tile_slope"),
 	GRFVariableMapDefinition(GSF_NEWLANDSCAPE, 0x42, "newlandscape_tile_height"),

src/newgrf_extension.h

@@ -96,6 +96,7 @@ enum Action2VariableRemapIds {
 	A2VRI_TOWNS_ZONE_2,
 	A2VRI_TOWNS_ZONE_3,
 	A2VRI_TOWNS_ZONE_4,
+	A2VRI_TOWNS_XY,
 };
 
 enum GRFFeatureTestObservationFlag : uint8 {

src/newgrf_town.cpp

@@ -119,6 +119,9 @@
 		case A2VRI_TOWNS_ZONE_3:
 		case A2VRI_TOWNS_ZONE_4:
 			return this->t->cache.squared_town_zone_radius[variable - A2VRI_TOWNS_ZONE_0];
+
+		case A2VRI_TOWNS_XY:
+			return TileY(this->t->xy) << 16 | (TileX(this->t->xy) & 0xFFFF);
 	}
 
 	DEBUG(grf, 1, "Unhandled town variable 0x%X", variable);
@@ -180,6 +183,7 @@
 		case A2VRI_TOWNS_ZONE_2:
 		case A2VRI_TOWNS_ZONE_3:
 		case A2VRI_TOWNS_ZONE_4:
+		case A2VRI_TOWNS_XY:
 			return 0;
 	}
 

src/table/newgrf_debug_data.h

@@ -1639,6 +1639,7 @@ static const NIVariable _niv_towns[] = {
 	NIV(A2VRI_TOWNS_ZONE_2, "zone radius 2 (uncapped)"),
 	NIV(A2VRI_TOWNS_ZONE_3, "zone radius 3 (uncapped)"),
 	NIV(A2VRI_TOWNS_ZONE_4, "zone radius 4 (uncapped)"),
+	NIV(A2VRI_TOWNS_XY, "town tile xy"),
 	NIV_END()
 };