EditorGUILayout.Vector3Field 三维向量字段

// Simple Script that measures the distance between 2 GameObjects
// or measure the distance between 2 positions in 3D space
//测量在3D空间两物体或两点之间的距离。
class EditorGUILayoutVector3Field extends EditorWindow {

	var distance : float = 0;
	var obj1 : Vector3;
	var obj2 : Vector3;

	@MenuItem("Examples/Measure Distance between 2 objects")
	static function Init() {
		var window = GetWindow(EditorGUILayoutVector3Field);
		window.Show();
	}
	function OnGUI() {
		GUILayout.Label("Select an object in the Hierarchy view and click 'Capture Position'");
		EditorGUILayout.BeginHorizontal();
			obj1 = EditorGUILayout.Vector3Field("GameObject 1:", obj1);
			if(GUILayout.Button("Capture Position"))
				obj1 = Selection.activeTransform.position;
		EditorGUILayout.EndHorizontal();

		EditorGUILayout.BeginHorizontal();
			obj2 = EditorGUILayout.Vector3Field("GameObject 2:", obj2);
			if(GUILayout.Button("Capture Position"))
				obj2 = Selection.activeTransform.position;
		EditorGUILayout.EndHorizontal();
		EditorGUILayout.LabelField("Distance:", distance.ToString());
		if(GUILayout.Button("Close"))
		this.Close();
	}
	function OnInspectorUpdate() {
		distance = Vector3.Distance(obj1,obj2);
		this.Repaint();
	}
}