diff --git a/src/DatabaseServices/Region.ts b/src/DatabaseServices/Region.ts
index 3955290c9..d4ce3b275 100644
--- a/src/DatabaseServices/Region.ts
+++ b/src/DatabaseServices/Region.ts
@@ -58,14 +58,14 @@ export class Region extends Entity
 
         for (let cu of this.m_CuList)
         {
+            if (cu.EndPoint.distanceTo(begin) < fuzz)
+                cu.Reverse();
+
+            //设置起点
+            begin.copy(cu.EndPoint);
 
             if (cu instanceof Line)
             {
-                if (cu.StartPoint.distanceTo(begin) < fuzz)
-                    begin = cu.EndPoint;
-                else
-                    begin = cu.StartPoint;
-
                 this.m_Shape.lineTo(begin.x, begin.y);
             }
             else if (cu instanceof Circle)
@@ -78,9 +78,6 @@ export class Region extends Entity
             }
             else if (cu instanceof Polyline)
             {
-                if (cu.EndPoint.distanceTo(begin) < fuzz)
-                    cu.Reverse();
-
                 let plData = cu.LineData;
                 let pts: Vector2[] = [];
                 let bul: number[] = [];
@@ -90,16 +87,10 @@ export class Region extends Entity
                     bul.push(d.bul);
                 }
                 CreateBoardUtil.createPath(pts, bul, this.m_Shape);
-
-                begin = cu.EndPoint;
             }
             else if (cu instanceof Arc)
             {
-                //起点和终点影响开始角度，结束角度和法向量
-                if (begin.distanceTo(cu.StartPoint) < 0.1)
-                    this.m_Shape.absarc(cu.Center.x, cu.Center.y, cu.Radius, cu.StartAngle, cu.EndAngle, cu.Normal.z < 0);
-                else
-                    this.m_Shape.absarc(cu.Center.x, cu.Center.y, cu.Radius, cu.EndAngle, cu.StartAngle, cu.Normal.z > 0);
+                this.m_Shape.absarc(cu.Center.x, cu.Center.y, cu.Radius, cu.StartAngle, cu.EndAngle, cu.IsClockWise);
             }
         }