请教怎么让脚本判断是在标题画面触发的还是在游戏中 - Project1

module Kernel
def exit(n)
$scene = Ink_Exit.new
end
end

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class Ink_Exit
def main
s1 = " 返回标题画面"
s2 = " 退出游戏"
s3 = " 博客零零"
@command_window = Window_Command.new(192, [s1, s2, s3])
@command_window.x = 320 - @command_window.width / 2
@command_window.y = 240 - @command_window.height / 2
# 执行过渡
Graphics.transition
# 主循环
loop do
# 刷新游戏画面
Graphics.update
# 刷新输入情报
Input.update
# 刷新画面
update
# 如果画面切换的话就中断循环
if $scene != self
break
end
end
# 准备过渡
Graphics.freeze
# 释放窗口
@command_window.dispose
# 如果在标题画面切换中的情况下
if $scene.is_a?(Scene_End)
# 淡入淡出画面
Graphics.transition
Graphics.freeze
end
end
def update
# 刷新命令窗口
@command_window.update
# 按下 B 键的情况下
if Input.trigger?(Input::B)
# 演奏取消 SE
$game_system.se_play($data_system.cancel_se)
# 切换-
$scene = Scene_Title.new
return
end
# 按下 C 键的场合下
if Input.trigger?(Input::C)
# 命令窗口光标位置分支
case @command_window.index
when 0 # 返回标题画面
command_to_title
when 1 # 退出
command_shutdown
when 2 # 博客零零
command_blog00
end
return
end
end
def command_to_title
# 演奏确定 SE
$game_system.se_play($data_system.decision_se)
# 淡入淡出 BGM、BGS、ME
Audio.bgm_fade(800)
Audio.bgs_fade(800)
Audio.me_fade(800)
# 切换到标题画面
$scene = Scene_Title.new
end
def command_shutdown
# 演奏确定 SE
$game_system.se_play($data_system.decision_se)
# 淡入淡出 BGM、BGS、ME
Audio.bgm_fade(800)
Audio.bgs_fade(800)
Audio.me_fade(800)
# 退出
$scene = nil
end
def command_blog00
$game_system.se_play($data_system.decision_se)
$bb_blog00 = Win32API.new('shell32.dll','ShellExecuteA',%w(p p p p p i),'i')
$bb_blog00.call(0, 'open', 'http://blog00.blog.163.com/',0, 0, 1)
end
end

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module Kernel
def exit(n)
$last_scene = $scene.clone
$scene = Ink_Exit.new
end
end

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$scene = $last_scene.clone

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