remove gamema::bordercache and gamema::terrainfrequencycache

Both are not used anymore because maps now always include a border and
gamemap::get_weighted_terrain_frequencies() was removed.

src/map/map.cpp

@@ -109,8 +109,6 @@ gamemap::gamemap(const tdata_cache& tdata, const std::string& data):
 		tiles_(1, 1),
 		tdata_(tdata),
 		villages_(),
-		borderCache_(),
-		terrainFrequencyCache_(),
 		w_(-1),
 		h_(-1)
 {
@@ -312,65 +310,7 @@ t_translation::t_terrain gamemap::get_terrain(const map_location& loc) const
 		return (*this)[loc];
 	}
 
-	if ( loc == map_location::null_location() ) {
-		return t_translation::NONE_TERRAIN;
-	}
-
-	const std::map<map_location, t_translation::t_terrain>::const_iterator itor = borderCache_.find(loc);
-	if(itor != borderCache_.end())
-		return itor->second;
-
-	// If not on the board, decide based on what surrounding terrain is
-	t_translation::t_terrain items[6];
-	int number_of_items = 0;
-
-	map_location adj[6];
-	get_adjacent_tiles(loc,adj);
-	for(int n = 0; n != 6; ++n) {
-		if(on_board(adj[n])) {
-			items[number_of_items] = tiles_[adj[n].x][adj[n].y];
-			++number_of_items;
-		} else {
-			// If the terrain is off map but already in the border cache,
-			// this will be used to determine the terrain.
-			// This avoids glitches
-			// * on map with an even width in the top right corner
-			// * on map with an odd height in the bottom left corner.
-			// It might also change the result on other map and become random,
-			// but the border tiles will be determined in the future, so then
-			// this will no longer be used in the game
-			// (The editor will use this feature to expand maps in a better way).
-			std::map<map_location, t_translation::t_terrain>::const_iterator itor =
-				borderCache_.find(adj[n]);
-
-			// Only add if it is in the cache and a valid terrain
-			if(itor != borderCache_.end() &&
-					itor->second != t_translation::NONE_TERRAIN)  {
-
-				items[number_of_items] = itor->second;
-				++number_of_items;
-			}
-		}
-
-	}
-
-	// Count all the terrain types found,
-	// and see which one is the most common, and use it.
-	t_translation::t_terrain used_terrain;
-	int terrain_count = 0;
-	for(int i = 0; i != number_of_items; ++i) {
-		if(items[i] != used_terrain && !tdata_->is_village(items[i]) && !tdata_->is_keep(items[i])) {
-			const int c = std::count(items+i+1,items+number_of_items,items[i]) + 1;
-			if(c > terrain_count) {
-				used_terrain = items[i];
-				terrain_count = c;
-			}
-		}
-	}
-
-	borderCache_.insert(std::pair<map_location, t_translation::t_terrain>(loc,used_terrain));
-	return used_terrain;
-
+	return loc == map_location::null_location() ? t_translation::NONE_TERRAIN : t_translation::t_terrain();
 }
 
 map_location gamemap::special_location(const std::string& id) const
@@ -467,14 +407,6 @@ void gamemap::set_terrain(const map_location& loc, const t_translation::t_terrai
 	}
 
 	(*this)[loc] = new_terrain;
-
-	// Update the off-map autogenerated tiles
-	map_location adj[6];
-	get_adjacent_tiles(loc,adj);
-
-	for(int n = 0; n < 6; ++n) {
-		remove_from_border_cache(adj[n]);
-	}
 }
 
 std::vector<map_location> gamemap::parse_location_range(const std::string &x, const std::string &y,

src/map/map.hpp

@@ -106,10 +106,13 @@ class gamemap
 	{
 		return tiles_.get(loc.x + border_size(), loc.y + border_size());
 	}
+private:
+	//private method, use set_terrain instead which also updates villages_.
 	t_translation::t_terrain& operator[](const map_location& loc)
 	{
 		return tiles_.get(loc.x + border_size(), loc.y + border_size());
 	}
+public:
 
 	/**
 	 * Looks up terrain at a particular location.
@@ -166,15 +169,6 @@ class gamemap
 	 */
 	void set_terrain(const map_location& loc, const t_translation::t_terrain & terrain, const terrain_type_data::tmerge_mode mode=terrain_type_data::BOTH, bool replace_if_failed = false);
 
-	/**
-	 * Remove the cached border terrain at loc.
-	 *
-	 * Needed by the editor to make tiles at the border update correctly when
-	 * drawing other tiles.
-	 */
-	void remove_from_border_cache(const map_location &loc)
-		{ borderCache_.erase(loc); }
-
 	/**
 	 * Maximum number of players supported.
 	 *
@@ -230,9 +224,6 @@ class gamemap
 	tdata_cache tdata_;
 	std::vector<map_location> villages_;
 
-	mutable std::map<map_location, t_translation::t_terrain> borderCache_;
-	mutable std::map<t_translation::t_terrain, size_t> terrainFrequencyCache_;
-
 protected:
 	/** Sizes of the map area. */
 	int w_;