Undo.RegisterSnapshot 注册快照

static function RegisterSnapshot () : void


Register the snapshot state made with CreateSnapshot so the user can later undo back to that state.


参见:SetSnapshotTarget , CreateSnapshotTarget.

// Editor Script Side
// Create a position Handle and make the target always look at the position handle.
// This is an editor Script, this should go inside the Editor Folder.
@CustomEditor (LookAtPoint)
class SnapshotTargetEx extends Editor {

	function OnSceneGUI () {
		Undo.SetSnapshotTarget(target, "Moved Object Around");
		target.lookAtPoint =
		Handles.PositionHandle(target.lookAtPoint, Quaternion.identity);
		if (GUI.changed)
			EditorUtility.SetDirty (target);

		if(Input.GetMouseButtonDown(0)) {
			// Register the undos when we press the Mouse button.

And the runtime script that works with this editor Script

// LookAtPoint.js

@script ExecuteInEditMode()

var lookAtPoint = Vector3.zero;

function Update () {
	transform.LookAt (lookAtPoint);
Page last updated: 2011-5-18