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



[CustomEditor(typeof(VolumeLightDrawer))]
public class RectangleDrawerEditor : Editor 
{
    private void OnSceneGUI()
    {
        VolumeLightDrawer drawer = (VolumeLightDrawer)target;
        // 将中心点转换为世界坐标
        Transform transform = drawer.transform;
        
        EditorGUI.BeginChangeCheck();
        Vector3 minPos = Handles.PositionHandle(drawer.BoundMinPos, Quaternion.identity);
        Vector3 maxPos = Handles.PositionHandle(drawer.BoundMaxPos, Quaternion.identity);
        Vector3 worldCenter = (minPos + maxPos) / 2;
        Vector3 minPos2 = Vector3.Min(minPos, maxPos);
        Vector3 maxPos2 = Vector3.Max(minPos, maxPos);
        Vector3 Size = minPos2 - maxPos2;
       
        if (EditorGUI.EndChangeCheck())
        {
            Undo.RecordObject(drawer, "Move Rectangle Center");
            drawer.BoundMinPos = minPos;
            drawer.BoundMaxPos = maxPos;
            drawer.transform.position = worldCenter;
        }
        else
        {
            //只要选中这个物体，之后所有的鼠标拖拽事件这里都可以监控到
            if (Event.current.type == EventType.MouseDrag)
            {
                Undo.RecordObject(drawer, "Move drawer Center");
                drawer.BoundMinPos = transform.position - Size/2; //minPos;
                drawer.BoundMaxPos = transform.position +  Size/2;//maxPos;
               //如果加入下面的代码，这个鼠标拖拽事件就不会被引擎内的控件相应，也就拖不动物体自己的坐标轴了
               //使用改方法使鼠标事件被自己创造的坐标控件截胡
               // Event.current.Use();
            }
           
        }
      
        // 绘制矩形线框
        Handles.color = drawer.lineColor;
        Handles.DrawWireCube(worldCenter,Size);
            
        }
      
    }