diff --git a/src/kiwano/2d/ShapeActor.cpp b/src/kiwano/2d/ShapeActor.cpp
index 5bd96330..a4a4b423 100644
--- a/src/kiwano/2d/ShapeActor.cpp
+++ b/src/kiwano/2d/ShapeActor.cpp
@@ -32,7 +32,7 @@ namespace kiwano
 	{
 	}
 
-	ShapeActor::ShapeActor(Geometry geometry)
+	ShapeActor::ShapeActor(Geometry const& geometry)
 		: ShapeActor()
 	{
 		SetGeometry(geometry);
@@ -80,7 +80,7 @@ namespace kiwano
 		stroke_style_ = stroke_style;
 	}
 
-	void ShapeActor::SetGeometry(Geometry geometry)
+	void ShapeActor::SetGeometry(Geometry const& geometry)
 	{
 		geo_ = geometry;
 		if (geo_)
@@ -134,13 +134,7 @@ namespace kiwano
 
 	void LineActor::SetPoint(Point const& point)
 	{
-		Geometry geo = Geometry::CreateLine(Point{}, point);
-
-		if (geo)
-		{
-			point_ = point;
-			SetGeometry(geo);
-		}
+		SetGeometry(Geometry::CreateLine(Point{}, point));
 	}
 
 
@@ -163,13 +157,7 @@ namespace kiwano
 
 	void RectActor::SetRectSize(Size const& size)
 	{
-		Geometry geo = Geometry::CreateRect(Rect{ Point{}, size });
-
-		if (geo)
-		{
-			rect_size_ = size;
-			SetGeometry(geo);
-		}
+		SetGeometry(Geometry::CreateRect(Rect{ Point{}, size }));
 	}
 
 
@@ -202,13 +190,7 @@ namespace kiwano
 
 	void RoundRectActor::SetRoundedRect(Size const& size, Vec2 const& radius)
 	{
-		Geometry geo = Geometry::CreateRoundedRect(Rect{ Point{}, size }, radius);
-
-		if (geo)
-		{
-			rect_size_ = size;
-			SetGeometry(geo);
-		}
+		SetGeometry(Geometry::CreateRoundedRect(Rect{ Point{}, size }, radius));
 	}
 
 
@@ -232,12 +214,7 @@ namespace kiwano
 
 	void CircleActor::SetRadius(Float32 radius)
 	{
-		Geometry geo = Geometry::CreateCircle(Point{}, radius);
-
-		if (geo)
-		{
-			SetGeometry(geo);
-		}
+		SetGeometry(Geometry::CreateCircle(Point{ radius, radius }, radius));
 	}
 
 
@@ -260,11 +237,38 @@ namespace kiwano
 
 	void EllipseActor::SetRadius(Vec2 const& radius)
 	{
-		Geometry geo = Geometry::CreateEllipse(Point{}, radius);
+		SetGeometry(Geometry::CreateEllipse(radius, radius));
+	}
 
-		if (geo)
+
+	//-------------------------------------------------------
+	// PolygonActor
+	//-------------------------------------------------------
+
+	PolygonActor::PolygonActor()
+	{
+	}
+
+	PolygonActor::PolygonActor(Vector<Point> const& points)
+	{
+		SetVertices(points);
+	}
+
+	PolygonActor::~PolygonActor()
+	{
+	}
+
+	void PolygonActor::SetVertices(Vector<Point> const& points)
+	{
+		if (points.size() > 1)
 		{
-			SetGeometry(geo);
+			SetGeometry(
+				GeometrySink()
+				.BeginPath(points[0])
+				.AddLines(&points[1], points.size() - 1)
+				.EndPath(true)
+				.GetGeometry()
+			);
 		}
 	}
 
diff --git a/src/kiwano/2d/ShapeActor.h b/src/kiwano/2d/ShapeActor.h
index 0ead7c30..d0eec865 100644
--- a/src/kiwano/2d/ShapeActor.h
+++ b/src/kiwano/2d/ShapeActor.h
@@ -33,7 +33,7 @@ namespace kiwano
 		ShapeActor();
 
 		ShapeActor(
-			Geometry geometry
+			Geometry const& geometry
 		);
 
 		virtual ~ShapeActor();
@@ -75,7 +75,7 @@ namespace kiwano
 		void SetStrokeStyle(StrokeStyle stroke_style);
 
 		// 设置形状
-		void SetGeometry(Geometry geometry);
+		void SetGeometry(Geometry const& geometry);
 
 		void OnRender(RenderTarget* rt) override;
 
@@ -218,6 +218,25 @@ namespace kiwano
 	};
 
 
+	// 多边形角色
+	class KGE_API PolygonActor
+		: public ShapeActor
+	{
+	public:
+		PolygonActor();
+
+		PolygonActor(
+			Vector<Point> const& points
+		);
+
+		virtual ~PolygonActor();
+
+		void SetVertices(
+			Vector<Point> const& points
+		);
+	};
+
+
 	// 路径角色
 	class KGE_API PathActor
 		: public ShapeActor
diff --git a/src/kiwano/2d/action/ActionWalk.h b/src/kiwano/2d/action/ActionWalk.h
index 9d05c893..eeaae114 100644
--- a/src/kiwano/2d/action/ActionWalk.h
+++ b/src/kiwano/2d/action/ActionWalk.h
@@ -90,10 +90,10 @@ namespace kiwano
 		void ClearPath();
 
 		// 获取路线
-		inline Geometry GetPath() const		{ return path_; }
+		inline Geometry const& GetPath() const		{ return path_; }
 
 		// 设置路径
-		inline void SetPath(Geometry path)	{ path_ = path; }
+		inline void SetPath(Geometry const& path)	{ path_ = path; }
 
 	protected:
 		void Init(ActorPtr target) override;
diff --git a/src/kiwano/2d/include-forwards.h b/src/kiwano/2d/include-forwards.h
index bbe73ae7..047488e0 100644
--- a/src/kiwano/2d/include-forwards.h
+++ b/src/kiwano/2d/include-forwards.h
@@ -45,6 +45,7 @@ namespace kiwano
 	KGE_DECLARE_SMART_PTR(RoundRectActor);
 	KGE_DECLARE_SMART_PTR(CircleActor);
 	KGE_DECLARE_SMART_PTR(EllipseActor);
+	KGE_DECLARE_SMART_PTR(PolygonActor);
 	KGE_DECLARE_SMART_PTR(PathActor);
 
 	KGE_DECLARE_SMART_PTR(Action);
diff --git a/src/kiwano/renderer/Geometry.cpp b/src/kiwano/renderer/Geometry.cpp
index 5858ba1d..eba0f2fb 100644
--- a/src/kiwano/renderer/Geometry.cpp
+++ b/src/kiwano/renderer/Geometry.cpp
@@ -246,6 +246,14 @@ namespace kiwano
 		return (*this);
 	}
 
+	GeometrySink& kiwano::GeometrySink::AddLines(const Point* points, UInt32 count)
+	{
+		if (!sink_) BeginPath();
+
+		sink_->AddLines(reinterpret_cast<const D2D_POINT_2F*>(points), count);
+		return (*this);
+	}
+
 	GeometrySink& GeometrySink::AddBezier(Point const& point1, Point const& point2, Point const& point3)
 	{
 		if (!sink_) BeginPath();
diff --git a/src/kiwano/renderer/Geometry.h b/src/kiwano/renderer/Geometry.h
index 86b2f290..d10bd68e 100644
--- a/src/kiwano/renderer/Geometry.h
+++ b/src/kiwano/renderer/Geometry.h
@@ -151,6 +151,12 @@ namespace kiwano
 			Vector<Point> const& points
 		);
 
+		// 添加多条线段
+		GeometrySink& AddLines(
+			const Point* points,
+			UInt32 count
+		);
+
 		// 添加一条三次方贝塞尔曲线
 		GeometrySink& AddBezier(
 			Point const& point1,	/* 贝塞尔曲线的第一个控制点 */
@@ -162,7 +168,7 @@ namespace kiwano
 		GeometrySink& AddArc(
 			Point const& point,		/* 终点 */
 			Size const& radius,		/* 椭圆半径 */
-			Float32 rotation,			/* 椭圆旋转角度 */
+			Float32 rotation,		/* 椭圆旋转角度 */
 			bool clockwise = true,	/* 顺时针 or 逆时针 */
 			bool is_small = true	/* 是否取小于 180° 的弧 */
 		);