public void OnDrawHandles ();

描述

实现此方法可在自定义编辑器工具可用时绘制非交互式手柄。

当自定义编辑器工具可用于当前选定内容时,将调用此方法。使用此方法可在 SceneView 中绘制信息。自定义编辑器工具是目标类型由 EditorToolAttribute 指定的 EditorTool

using System;
using UnityEngine;
using UnityEditor;
using UnityEditor.EditorTools;

[EditorTool("Light Tool", typeof(Light))] public class CustomEditorLightTool : EditorTool, IDrawSelectedHandles { // OnToolGUI is called when the tool is active. Interactive handles belong here. public override void OnToolGUI(EditorWindow window) { var position = Tools.handlePosition;

EditorGUI.BeginChangeCheck();

var result = Handles.PositionHandle(position, Quaternion.identity);

if (EditorGUI.EndChangeCheck()) { var delta = result - position;

Undo.RecordObjects(Selection.transforms, "Move Lights");

foreach (var light in targets) ((Light)light).transform.position += delta; } }

// OnDrawHandles is called when a custom editor tool is available for the current selection. Use this to draw // information in the SceneView when any object matching the target type is selected. public void OnDrawHandles() { foreach (var light in targets) { // If the Light Tool is active, draw a green radius handle. If it is not active, make the radius blue. Handles.color = EditorTools.IsActiveTool(this) ? Color.green : Color.blue; Handles.RadiusHandle(Quaternion.identity, ((Light)light).transform.position, 2f); Handles.color = Color.white; } } }