Added building structure

Created harvester building
added harvester particles
added nearest resource func

scripts/autoloads/grid.gd

@@ -4,6 +4,8 @@ const GRID_SIZE := 64
 var world_grid: TileMap
 var world_data: Dictionary = {}
 
+var res_locations := {}
+
 func init(grid: TileMap) -> void:
 	world_grid = grid
 
@@ -37,6 +39,19 @@ func get_location_data(pos: Vector2i) -> CellData:
 func change_location_resource(pos: Vector2i, data: GameResource) -> void:
 	world_data[pos].change_resource(data)
 	world_grid.set_cell(Constants.TilemapLayers.ENVIRONMENT, pos, 0, data.atlas_location)
+	if not res_locations.has(data):
+		res_locations[data] = []
+	res_locations[data].append(Grid.grid_to_world_center(pos))
+
+func get_nearest_resource(pos: Vector2, data: GameResource) -> Vector2:
+	var distance: float = 9999
+	var nearest: Vector2
+	for location: Vector2 in res_locations[data]:
+		var _dist = pos.distance_to(location)
+		if _dist < distance:
+			distance = _dist
+			nearest = location
+	return nearest
 
 func change_location_building(pos: Vector2i, data: BuildingBase) -> void:
 	world_data[pos].change_building(data)