Unity Script Reference:

static function Vector3Field(label: string, value: Vector3, params options: GUILayoutOption[]): Vector3;

static Vector3 Vector3Field(string label, Vector3 value, params GUILayoutOption[] options);

static def Vector3Field(label as string, value as Vector3, *options as GUILayoutOption[]) as Vector3

static function Vector3Field(label: GUIContent, value: Vector3, params options: GUILayoutOption[]): Vector3;

static Vector3 Vector3Field(GUIContent label, Vector3 value, params GUILayoutOption[] options);

static def Vector3Field(label as GUIContent, value as Vector3, *options as GUILayoutOption[]) as Vector3

Parameters

label	Label to display above the field.
value	The value to edit.
options	An optional list of layout options that specify extra layouting properties. Any values passed in here will override settings defined by the `style`. See Also: GUILayout.Width, GUILayout.Height, GUILayout.MinWidth, GUILayout.MaxWidth, GUILayout.MinHeight, GUILayout.MaxHeight, GUILayout.ExpandWidth, GUILayout.ExpandHeight.

Returns
Vector3 The value entered by the user.

Description

Make an X, Y & Z field for entering a Vector3.

Measure the distance between 2 GameObjects or 2 positions in 3D space.

	// Simple Script that measures the distance between 2 GameObjects
	// or measure the distance between 2 positions in 3D space
	
	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();
		}
	}