diff --git a/src/DatabaseServices/Region.ts b/src/DatabaseServices/Region.ts
index e4004c5a3..4be9713d7 100644
--- a/src/DatabaseServices/Region.ts
+++ b/src/DatabaseServices/Region.ts
@@ -57,7 +57,7 @@ export class Region extends Entity
     private GeneralShape()
     {
         this.m_Shape = new THREE.Shape();
-        let begin: Vector3 = new Vector3();
+        let begin: Vector3;
         if (this.m_CuList.length > 1)
         {
             let firstL = this.m_CuList[0];
@@ -73,9 +73,12 @@ export class Region extends Entity
             }
             this.m_Shape.moveTo(begin.x, begin.y);
         }
+        else
+            begin = new Vector3();
+
         for (let cu of this.m_CuList)
         {
-            if (begin && cu.EndPoint.distanceTo(begin) < fuzz)
+            if (cu.EndPoint.distanceTo(begin) < fuzz)
                 cu.Reverse();
             //设置起点
             begin.copy(cu.EndPoint);