level building tool good enough for first cave draft

Scenes/FlowField/flow_field_data.gd

@@ -3,3 +3,25 @@ extends Resource
 
 @export var nodes: Array[FlowNodeData]
 @export var grids: int = 0
+
+
+func to_dict() -> Dictionary:
+	var dict: Dictionary = {}
+	for node: FlowNodeData in nodes:
+		dict[node.node_id] = node.to_dict()
+	dict["grids"] = grids
+	return dict
+
+
+static func from_dict(dict: Dictionary) -> FlowFieldData:
+	var flow: FlowFieldData = FlowFieldData.new()
+	var unpopulated: Dictionary[FlowNodeData, Dictionary] = {}
+	for key: String in dict.keys():
+		if key.is_valid_int():
+			var data: FlowNodeData = FlowNodeData.from_dict(dict[key])
+			flow.nodes.append(data)
+			unpopulated[data] = dict[key]
+	for key: FlowNodeData in unpopulated.keys():
+		key.populate_connections(unpopulated[key], flow.nodes)
+	flow.grids = dict["grids"]
+	return flow