The hinge permits 1 degree of freedom between two objects. Translation is completely constrained. Rotation is permitted about the Z axis of the object hosting the Physics constraint (usually an empty, distinct from the two objects that are being linked). Adjusting the position and rotation of the object hosting the constraint allows you to control the anchor and axis of the hinge.
铰链是唯一使用Z 轴而不是X 轴的1-轴旋转约束。如果铰链出现问题，请检查其他约束以确定是否存在问题。
- Z 角度