OnSceneGUI()
Enables the Editor to handle an event in the Scene view.
Read time 1 minuteLast updated 7 days ago
Definition
- Type: Method
- Namespace: UnityEditor
public void OnSceneGUI()
Remarks
In the OnSceneGUI you can, for example, edit meshes, paint terrain, or have advanced gizmos. Refer to the Handles class for methods related to drawing interactable visuals in the SceneView. If you want to draw elements in the Scene view, for instance by using `Graphics.DrawMeshNow`, only do so during EventType.Repaint. In the following two scripts, OnSceneGUI is used to draw lines between GameObjects. The first script shows how OnSceneGUI is used. In this script, a GameObject is used as a parent. The script obtains the position of the parent and then draws lines from that position to GameObjects stored in an array. The script uses Handles.DrawLine to draw lines. The documentation for Handles.DrawLine has a very similar example.
Examples
using UnityEngine;using UnityEditor;[CustomEditor( typeof( DrawLine ) )]public class DrawLineEditor : Editor{ // Draw lines between a chosen GameObject // and a selection of added GameObjects void OnSceneGUI() { // Get the chosen GameObject DrawLine t = target as DrawLine; if( t == null || t.GameObjects == null ) return; // Grab the center of the parent Vector3 center = t.transform.position; // Iterate over GameObject added to the array... for( int i = 0; i < t.GameObjects.Length; i++ ) { // ... and draw a line between them if( t.GameObjects[i] != null ) Handles.DrawLine( center, t.GameObjects[i].transform.position ); } }}