One way is to find the geometric center of the object by computing the object bounding box by finding the maximum and minimum X, Y and Z values, then computing the mid-point of the bounding box.
先找到物体包围盒的中心，找到物体最大和最小的X，Y，Z坐标，两个坐标中点就是物体包围盒的中心。
Minimum—Aligns the closest point of the object's bounding box with the chosen point on the other object.
这句话的意思是：以物体的边界盒最内侧点同另一物体的选择点对齐。
Minimum—Aligns the closest point of the object's bounding box with the chosen point on the other object.
这句话的意思是：以物体的边界盒最内侧点同另一物体的选择点对齐。
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