accurately find tile coords. moved error msgs to global.

scripts/World.gd

@@ -1,8 +1,9 @@
 extends TileMap
 
+signal set_camera_position(pos:Vector2)
+
 var building : bool = false
 var building_type: String
-var tilemap: Vector2i
 #var scene
 
 # Called when the node enters the scene tree for the first time.
@@ -31,41 +32,93 @@ func _input(event):
 		# stop processing the sprite (fix it in place). no idea if it is a good idea yet..	
 		#building.set_process(false)
 		building = false
-		place_building_to_map()
+		place_building_to_map(event)
 	
 	# cancel placement
 	if event.is_action_pressed("cancel"):
 		if building != false:
 			pass
 			
+func calculate_grid_coordinates(map_position: Vector2) -> Vector2:
+	return (map_position).floor()
 
-func place_building_to_map():
-	# layer | position coords | tilemap id | coords of the tile at tilemap | alternative tile
-		
+func place_building_to_map(event):
+	var tileset_id = 0 # default value
+	var tilemap_tile_coords: Vector2i
+	
+	# layer | position coords | tileset id | coords of the tile at tilemap | alternative tile		
 	match building_type:
 		Globals.TYPE_RESIDENTIAL:
-			tilemap = Vector2i(0,0)
-			set_cell(0, local_to_map(get_viewport().get_mouse_position()) , 0, tilemap, 0)
+			tilemap_tile_coords = Vector2i(0,0) 
+			tileset_id = 0
 		Globals.TYPE_COMMERCIAL:
-			tilemap = Vector2i(4,12)
-			set_cell(0, local_to_map(get_viewport().get_mouse_position()) , 1, tilemap, 0)
+			tilemap_tile_coords = Vector2i(4,12)
+			tileset_id = 1
 		Globals.TYPE_INDUSTRIAL:
-			tilemap = Vector2i(4,20)
-			set_cell(0, local_to_map(get_viewport().get_mouse_position()) , 1, tilemap, 0)
+			tilemap_tile_coords = Vector2i(4,20)
+			tileset_id = 1
 		Globals.TYPE_ROADS:
-			tilemap = Vector2i(14,2)
-			set_cell(0, local_to_map(get_viewport().get_mouse_position()) , 1, tilemap, 0)
+			tilemap_tile_coords = Vector2i(14,2)
+			tileset_id = 1
 		Globals.TYPE_DEMOLISH:
-			tilemap = Vector2i(4,4)
-			set_cell(0, local_to_map(get_viewport().get_mouse_position()) , 1, tilemap, 0)
+			tilemap_tile_coords = Vector2i(4,4)
+			tileset_id = 1
 		Globals.TYPE_SERVICES:
-			tilemap = Vector2i(4,8)
-			set_cell(0, local_to_map(get_viewport().get_mouse_position()) , 1, tilemap, 0)
+			tilemap_tile_coords = Vector2i(4,8)
+			tileset_id = 1
 		Globals.TYPE_SOCIAL:
-			tilemap = Vector2i(4,0)
-			set_cell(0, local_to_map(get_viewport().get_mouse_position()) , 1, tilemap, 0)
+			tilemap_tile_coords = Vector2i(4,0)
+			tileset_id = 1
 		_:	#default
-			tilemap = Vector2i(16,16)
-			set_cell(0, local_to_map(get_viewport().get_mouse_position()) , 1, tilemap, 0)
+			tilemap_tile_coords = Vector2i(16,16)
+			tileset_id = 1
 			
-	# set_cell(0, local_to_map(get_viewport().get_mouse_position()) , 1, tilemap, 0)
+	var mouse_pos = local_to_map(get_global_mouse_position())
+	set_cell(Globals.LAYER_BUILDINGS, mouse_pos, tileset_id, tilemap_tile_coords, 0)
+	#print("cell set at layer ", Globals.LAYER_BUILDINGS)
+	#print("cellpos:", local_to_map(get_global_mouse_position()))
+	#print("event position:", event.position)
+
+func generate_terrain(filename) -> bool:	
+	# Try to load the image which we used to place water & ground to world map
+	var image:Image = Image.new()		
+	image = load(filename)		
+	if image == null:
+		var errmsg = Globals.ERROR_FAILED_TO_LOAD_FILE
+		push_error(errmsg % filename)
+		return false
+		
+	var image_height:int = image.get_height()
+	var image_width:int = image.get_width()
+		
+	# Check if image is too small or too large
+	if Globals.MAP_MIN_HEIGHT > image_height or image_height > Globals.MAP_MAX_HEIGHT:
+		var errmsg = Globals.ERROR_IMAGE_HEIGHT_INCORRECT
+		errmsg = errmsg % [image_height, Globals.MAP_MIN_HEIGHT, Globals.MAP_MAX_HEIGHT]
+		push_error(errmsg)
+		return false
+	elif Globals.MAP_MIN_WIDTH > image_width or image_width > Globals.MAP_MAX_WIDTH:
+		var errmsg = Globals.ERROR_IMAGE_WIDTH_INCORRECT
+		errmsg = errmsg % [image_width, Globals.MAP_MIN_WIDTH, Globals.MAP_MAX_WIDTH]
+		push_error(errmsg)
+		return false
+		
+	# Try to load the world tilemap where we place the tiles
+	if (Globals.world_map == null):
+		print("World TileMap node missing or name is wrong.\n
+			  Tried to load: '%s'", Globals.WORLD_NODE)
+		return false	
+		
+	# Finally populate the world map with hopefully valid tiles!	
+	for x in image_width:
+		for y in image_height:
+			# layer | position coords | tilemap id | coords of the tile at tilemap | alternative tile
+			if image.get_pixel(x, y) == Globals.WATER_TILE_COLOR_IN_MAP_FILE:
+				Globals.world_map.set_cell(Globals.LAYER_TERRAIN, Vector2i(x, y), 2, Vector2i(0,0), 0)	
+	
+	# center camera to world map
+	emit_signal(
+		"set_camera_position", 
+		Vector2(image_height/2.0*Globals.TILE_SIZE_X, image_width/2.0*Globals.TILE_SIZE_Y)
+	)
+	return true