add neghbour calculation

include/fggl/entity/gridworld/zone.hpp

@@ -34,7 +34,6 @@ namespace fggl::entity::grid {
 	template<typename T, uint32_t width, uint32_t height>
 	struct Grid {
 		public:
-			constexpr static std::array<math::vec2i, 4> DIRECTIONS{{ {-1, 0}, {0, -1}, {1, 0}, {0, 1} }};
 
 			Grid() = default;
 
@@ -98,6 +97,7 @@ namespace fggl::entity::grid {
 	template<uint32_t width, uint32_t height>
 	struct Area2D {
 		public:
+			constexpr static std::array<math::vec2i, 4> DIRECTIONS{{ {-1, 0}, {0, -1}, {1, 0}, {0, 1} }};
 			inline explicit Area2D(TileSet& tiles) : m_tiles(tiles) {
 				clear();
 			}
@@ -155,33 +155,20 @@ namespace fggl::entity::grid {
 				return canMove(pos + dir) && !blocked(pos, dir);
 			}
 
-			inline bool blocked(GridPos pos, math::vec2i dir) const {
-				auto targetPos = pos;
-				if ( dir.x == 1 || dir.y == 1 ) {
-					targetPos = pos + dir;
-				}
-
-				if ( !inBounds(targetPos) ) {
-					return true;
-				}
-
-				auto& wallObj = m_walls.get(targetPos);
-				if ( dir.y != 0 ) {
-					return wallObj.north != 0;
-				}
-
-				if (dir.x != 0) {
-					return wallObj.west != 0;
-				}
-
-				return true;
-			}
+			inline bool blocked(GridPos pos, math::vec2i dir) const;
 
 			EntityManager& entities() {
 				return m_entities;
 			}
 
-			void neighbours(math::vec2i pos, std::vector<math::vec2i> &neighbours) const;
+			inline void neighbours(math::vec2i pos, std::vector<math::vec2i> &neighbours) const {
+				for (auto direction : DIRECTIONS) {
+					if ( canMove(pos, direction) ) {
+						auto result = pos + direction;
+						neighbours.push_back(result);
+					}
+				}
+			}
 		private:
 			TileSet& m_tiles;
 			Grid<uint32_t, width, height> m_floors;
@@ -189,6 +176,29 @@ namespace fggl::entity::grid {
 			EntityManager m_entities;
 	};
 
+	template<uint32_t width, uint32_t height>
+	bool Area2D<width, height>::blocked(GridPos pos, math::vec2i dir) const {
+		auto targetPos = pos;
+		if ( dir.x == 1 || dir.y == 1 ) {
+			targetPos = pos + dir;
+		}
+
+		if ( !inBounds(targetPos) ) {
+			return true;
+		}
+
+		auto& wallObj = m_walls.get(targetPos);
+		if ( dir.y != 0 ) {
+			return wallObj.north != 0;
+		}
+
+		if (dir.x != 0) {
+			return wallObj.west != 0;
+		}
+
+		return true;
+	}
+
 } // namespace fggl::entity::gridworld
 
 #endif //FGGL_ENTITY_GRIDWORLD_ZONE_HPP