EditorGUILayout.Vector3Field

Name	Description
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

Vector3 - The value entered by the user.

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();
}
}