【保存游戏】

使用 var2str 和 str2var 进行保存和恢复游戏。

extends Node2D

const SAVE_FILE_PATH := "user://game.save"

onready var save_button: Button = $HBoxContainer/SaveButton
onready var load_button: Button = $HBoxContainer/LoadButton
onready var reset_button: Button = $HBoxContainer/ResetButton

func _ready() -> void:
    save_button.connect("pressed",self,"save")
    save_button.connect("pressed",self,"load_save")
    save_button.connect("pressed",self,"reset")

func save() -> void:
    var save_data := {}

    var units := get_tree().get_nodes_in_group("units")
    for unit in units:
        save_data[get_path_to(unit)] = {
            "current_cell": unit.current_cell,
            "rotation": unit.rotation
        }
    
    var data_as_string := var2str(save_data)

    var file := File.new()
    file.open(SAVE_FILE_PATH, File.WRITE)
    file.store_string(data_as_string)
    file.close()

func load_save() -> void:
    var file := File.new()
    file.open(SAVE_FILE_PATH, File.READ)
    var data: Dictionary = str2var(file.get_as_text())
    file.close()

    var units := get_tree().get_nodes_in_group("units")
    for unit in units:
        var path := get_path_to(unit)
        if data.has(path):
            unit.current_cell = data[path].current_cell
            unit.rotation = data[path].rotation

func reset() -> void:
    get_tree().reload_current_scene()