# HG changeset patch
# User Yexo <Yexo@openttd.org>
# Date 1233789981 0
# Node ID 486f6053d57c9eb7183b1373e781aeebe6c1c801
# Parent  9514cd63fe537995b1a7942412acdc5fb567d71b
(svn r15343) -Add [NoAI]: Add AITown::GetRoadLayout so AIs can get the road layout per town.

diff --git a/src/ai/api/ai_town.cpp b/src/ai/api/ai_town.cpp
--- a/src/ai/api/ai_town.cpp
+++ b/src/ai/api/ai_town.cpp
@@ -192,3 +192,10 @@
 	}
 	return max(0, 2 - num);
 }
+
+/* static */ AITown::RoadLayout AITown::GetRoadLayout(TownID town_id)
+{
+	if (!IsValidTown(town_id)) return ROAD_LAYOUT_INVALID;
+
+	return (AITown::RoadLayout)((TownLayout)::GetTown(town_id)->layout);
+}
diff --git a/src/ai/api/ai_town.hpp b/src/ai/api/ai_town.hpp
--- a/src/ai/api/ai_town.hpp
+++ b/src/ai/api/ai_town.hpp
@@ -85,6 +85,18 @@
 	};
 
 	/**
+	 * Possible layouts for the roads in a town.
+	 */
+	enum RoadLayout {
+		/* Order IS important, as it matches an in-game value */
+		ROAD_LAYOUT_ORIGINAL,     ///< Original algorithm (min. 1 distance between roads).
+		ROAD_LAYOUT_BETTER_ROADS, ///< Extended original algorithm (min. 2 distance between roads).
+		ROAD_LAYOUT_2x2,          ///< Geometric 2x2 grid algorithm
+		ROAD_LAYOUT_3x3,          ///< Geometric 3x3 grid algorithm
+		ROAD_LAYOUT_INVALID = -1, ///< The layout for invalid towns.
+	};
+
+	/**
 	 * Gets the maximum town index; there are no valid towns with a higher index.
 	 * @return The maximum town index.
 	 * @post Return value is always non-negative.
@@ -279,6 +291,13 @@
 	 * @return The noise that still can be added.
 	 */
 	static int GetAllowedNoise(TownID town_id);
+
+	/**
+	 * Get the road layout for a town.
+	 * @param town_id The town to get the road layout from.
+	 * @return The RoadLayout for the town.
+	 */
+	static RoadLayout GetRoadLayout(TownID town_id);
 };
 
 #endif /* AI_TOWN_HPP */
diff --git a/src/ai/api/ai_town.hpp.sq b/src/ai/api/ai_town.hpp.sq
--- a/src/ai/api/ai_town.hpp.sq
+++ b/src/ai/api/ai_town.hpp.sq
@@ -9,6 +9,8 @@
 	template <> int Return<AITown::TownAction>(HSQUIRRELVM vm, AITown::TownAction res) { sq_pushinteger(vm, (int32)res); return 1; }
 	template <> AITown::TownRating GetParam(ForceType<AITown::TownRating>, HSQUIRRELVM vm, int index, SQAutoFreePointers *ptr) { SQInteger tmp; sq_getinteger(vm, index, &tmp); return (AITown::TownRating)tmp; }
 	template <> int Return<AITown::TownRating>(HSQUIRRELVM vm, AITown::TownRating res) { sq_pushinteger(vm, (int32)res); return 1; }
+	template <> AITown::RoadLayout GetParam(ForceType<AITown::RoadLayout>, HSQUIRRELVM vm, int index, SQAutoFreePointers *ptr) { SQInteger tmp; sq_getinteger(vm, index, &tmp); return (AITown::RoadLayout)tmp; }
+	template <> int Return<AITown::RoadLayout>(HSQUIRRELVM vm, AITown::RoadLayout res) { sq_pushinteger(vm, (int32)res); return 1; }
 
 	/* Allow AITown to be used as Squirrel parameter */
 	template <> AITown *GetParam(ForceType<AITown *>, HSQUIRRELVM vm, int index, SQAutoFreePointers *ptr) { SQUserPointer instance; sq_getinstanceup(vm, index, &instance, 0); return  (AITown *)instance; }
@@ -41,6 +43,11 @@
 	SQAITown.DefSQConst(engine, AITown::TOWN_RATING_EXCELLENT,        "TOWN_RATING_EXCELLENT");
 	SQAITown.DefSQConst(engine, AITown::TOWN_RATING_OUTSTANDING,      "TOWN_RATING_OUTSTANDING");
 	SQAITown.DefSQConst(engine, AITown::TOWN_RATING_INVALID,          "TOWN_RATING_INVALID");
+	SQAITown.DefSQConst(engine, AITown::ROAD_LAYOUT_ORIGINAL,         "ROAD_LAYOUT_ORIGINAL");
+	SQAITown.DefSQConst(engine, AITown::ROAD_LAYOUT_BETTER_ROADS,     "ROAD_LAYOUT_BETTER_ROADS");
+	SQAITown.DefSQConst(engine, AITown::ROAD_LAYOUT_2x2,              "ROAD_LAYOUT_2x2");
+	SQAITown.DefSQConst(engine, AITown::ROAD_LAYOUT_3x3,              "ROAD_LAYOUT_3x3");
+	SQAITown.DefSQConst(engine, AITown::ROAD_LAYOUT_INVALID,          "ROAD_LAYOUT_INVALID");
 
 	SQAITown.DefSQStaticMethod(engine, &AITown::GetClassName,               "GetClassName",               1, "x");
 	SQAITown.DefSQStaticMethod(engine, &AITown::GetMaxTownID,               "GetMaxTownID",               1, "x");
@@ -64,6 +71,7 @@
 	SQAITown.DefSQStaticMethod(engine, &AITown::PerformTownAction,          "PerformTownAction",          3, "xii");
 	SQAITown.DefSQStaticMethod(engine, &AITown::GetRating,                  "GetRating",                  3, "xii");
 	SQAITown.DefSQStaticMethod(engine, &AITown::GetAllowedNoise,            "GetAllowedNoise",            2, "xi");
+	SQAITown.DefSQStaticMethod(engine, &AITown::GetRoadLayout,              "GetRoadLayout",              2, "xi");
 
 	SQAITown.PostRegister(engine);
 }