godot-demo-projects/3d/voxel/settings.gd

extends Node

var render_distance := 7
var fog_enabled := true

var fog_distance := 32.0  # Not saved, only used during runtime.
var world_type := 0  # Not saved, only used during runtime.

var _save_path := "user://settings.json"

func _enter_tree() -> void:
	if FileAccess.file_exists(_save_path):
		var file := FileAccess.open(_save_path, FileAccess.READ)
		while file.get_position() < file.get_length():
			# Get the saved dictionary from the next line in the save file
			var json := JSON.new()
			json.parse(file.get_line())
			var data: Dictionary = json.get_data()
			render_distance = data["render_distance"]
			fog_enabled = data["fog_enabled"]
	else:
		save_settings()


func save_settings() -> void:
	var file := FileAccess.open(_save_path, FileAccess.WRITE)
	var data := {
		"render_distance": render_distance,
		"fog_enabled": fog_enabled,
	}
	file.store_line(JSON.stringify(data))