拓展Scene视图——场景编辑Vector2/3

Test.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Test : MonoBehaviour {

    [SerializeField]
    private Vector2 _pt=new Vector2(,);

    public Vector2 point{
        get { return _pt; }
        set { _pt=value; }
    }
}

MyEditor.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;

[CustomEditor(typeof(Test))]
public class MyEditor : Editor {
    private void OnSceneGUI() {
        Test test=(Test)target;

        //绘制文本框
         Handles.Label(test.point,string.Format("({0},{1})",test.point.x,test.point.y));

        EditorGUI.BeginChangeCheck();
        float size=HandleUtility.GetHandleSize(test.point)*0.05f;
        Vector2 snap=Vector2.one*0.05f;
        Vector2 newPoint=Handles.FreeMoveHandle(test.point,Quaternion.identity,size,snap,Handles.DotHandleCap);
        if(EditorGUI.EndChangeCheck()){
            Undo.RecordObject(test,"change point");//记录更改，实现撤消回退
            test.point=newPoint;
        }
    }

}