diff --git a/src/Editor/SelectBox.ts b/src/Editor/SelectBox.ts
index 1ab04626a..0e89f1a89 100644
--- a/src/Editor/SelectBox.ts
+++ b/src/Editor/SelectBox.ts
@@ -2,13 +2,20 @@ import { SelectSetBase, SelectType } from './SelectSet';
 import * as THREE from 'three';
 import { Viewer } from '../GraphicsSystem/Viewer';
 import * as verb from 'verb-nurbs-web';
-//矩形选区
+
+/**
+ * 矩形选区
+ * 
+ * @export
+ * @class SelectBox
+ * @extends {SelectSetBase}
+ */
 export class SelectBox extends SelectSetBase
 {
 
-    m_SelectBox: THREE.Box2 = new THREE.Box2();
-    m_RectLines = new Array<verb.core.PolylineData>();
-    m_Frustom: THREE.Frustum = new THREE.Frustum();
+    private m_SelectBox: THREE.Box2 = new THREE.Box2();
+    private m_RectLines = new Array<verb.core.PolylineData>();
+    private m_Frustom: THREE.Frustum = new THREE.Frustum();
 
     constructor(view: Viewer, p1: THREE.Vector2, p2: THREE.Vector2)
     {
@@ -48,23 +55,6 @@ export class SelectBox extends SelectSetBase
             camera.clearViewOffset();
         }
     }
-
-    IntersectLine(p1: THREE.Vector3, p2: THREE.Vector3)
-    {
-        let line = new verb.core.PolylineData([[p1.x, p1.y, 0], [p2.x, p2.y, 0]], [0, 1]);
-
-        for (let l of this.m_RectLines)
-        {
-            let ins = verb.eval.Intersect.polylines(l, line, 1e-8)
-            if (ins.length > 0)
-            {
-                return true;
-            }
-        }
-        return false;
-    }
-
-
     Select()
     {
         // let camera = this.m_Viewer.m_Camera.m_CurCamera;
@@ -92,7 +82,20 @@ export class SelectBox extends SelectSetBase
             }
         }
     }
+    IntersectLine(p1: THREE.Vector3, p2: THREE.Vector3)
+    {
+        let line = new verb.core.PolylineData([[p1.x, p1.y, 0], [p2.x, p2.y, 0]], [0, 1]);
 
+        for (let l of this.m_RectLines)
+        {
+            let ins = verb.eval.Intersect.polylines(l, line, 1e-8)
+            if (ins.length > 0)
+            {
+                return true;
+            }
+        }
+        return false;
+    }
     IntersectObject(obj: THREE.Object3D): Boolean
     {
         let geo = this.GetGeometry(obj);