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搞了半天都没法做出这样的效果，都是直接按下E或F，对话就出来了。怎么做出走到那个人物前，按下E，才产生对话呢？就是多一个交互键。
@埋言 可以给主角加个视线能力，然后距离调小一点，然后按下E时，如果NPC在主角视线内，再执行后续动作
