When I was looking at Unity Editor's Interface and suddenly I found a small icon. Then I hovered on it, and the text of toggle tool handle position appeared. I googled it and found the Unity Documentation website, it said: ( this is the website => https://docs.unity3d.com/Manual/PositioningGameObjects.html ) "Use the dropdown menu to switch between Pivot and Center.

Pivot positions the Gizmo at the actual pivot point of the GameObject, as defined by the Transform component. Center positions the Gizmo at a center position based on the selected GameObjects."

What are the actual pivot point of the GameObject and the center position based on the selected GameObjects?

CodePudding user response：

The pivot of an object is defined in the 3D file being used. It is often called the origin or transform. For example, in Blender or 3DS Max you could have the pivot set to vector 0, 0, 0, or you could have it set to one of the vertices positions. Imagine a cube 1mx1mx1m at position 0,0,0 - you could have the origin at 0,0,0, or you could use the top, right, forward vertice position, which would be (1, 1, 1).

The principal is the same when you select multiple objects in a scene; you can either have the pivot position for an individual object, or you can have an averaged position of all the objects selected. For example you have one object at (1, 0, 0) and one at (2, 0, 0) you can either have the pivot at (1,0,0) or (1.5, 0, 0).

The most use for this is when you want to rotate. Do you want to rotate a group of objects around a particular object, or do you want to rotate around their shared centre?