控制器的手柄。
控制器的手柄和指针通常在角度上不同。手柄是玩家用手握住的控制器的主要部分。控制器这一部分的主要用例是在用户手中握住一个物体，例如剑或枪。如果您想通过控制器姿势选择场景中的某个对象，那么这很可能是您想要用于射线投射的射线（假设您要渲染控制器模型以外的其他内容）。
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