控制器的指针。
控制器的手柄和指针通常在角度上不同。指针是控制器中距离玩家最远的部分，一般不直接用手握住。如果您想通过控制器姿势选择场景中的某个对象，并且您以编程方式渲染控制器，那么这可能是您想要用于射线投射的射线。
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