在引入 Mecanim 之前,Unity 使用过一种更简单的动画系统。为了向后兼容,该系统仍然可用。使用旧版动画系统的主要原因是可以继续直接处理旧项目,而无需为了 Mecanim 更新该项目。但是,建议不要将旧版系统用于新项目。
要导入旧版动画,必须先在 Import Settings 窗口的 Rig 选项卡中将 Animation Type 设置为 __Legacy__:
务必启用 Animation 选项卡上的 Import Animation 选项。
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