diff --git a/src/src/Rendering/Core/ControlPointActor.cpp b/src/src/Rendering/Core/ControlPointActor.cpp
index b9419b8..770175a 100644
--- a/src/src/Rendering/Core/ControlPointActor.cpp
+++ b/src/src/Rendering/Core/ControlPointActor.cpp
@@ -15,8 +15,7 @@
 vtkStandardNewMacro(ControlPointActor)
 
 ControlPointActor::ControlPointActor()
-        : shadowData(vtkPolyData::New())
-        , controlledActor(nullptr) {
+        : shadowData(vtkPolyData::New()) {
     BaseDataPoints->SetNumberOfPoints(1);
     renderPoints->SetNumberOfPoints(1);
     renderPoints->SetPoint(0, 0, 0, 0);
diff --git a/src/src/Rendering/Core/ControlPointActor.h b/src/src/Rendering/Core/ControlPointActor.h
index a5dd561..52a2ff7 100644
--- a/src/src/Rendering/Core/ControlPointActor.h
+++ b/src/src/Rendering/Core/ControlPointActor.h
@@ -29,8 +29,6 @@ public:
     void SetWorldPosition(double *pos) {
         SetWorldPosition(pos[0], pos[1], pos[2]);
     }
-    vtkSetObjectMacro(controlledActor,DraggableActor);
-    vtkGetObjectMacro(controlledActor,DraggableActor);
 
 
 protected:
@@ -39,7 +37,6 @@ protected:
     ~ControlPointActor() override;
 
     vtkPolyData *shadowData;
-    DraggableActor * controlledActor;
 
 };
 
diff --git a/src/src/Rendering/Core/DraggableActor.cpp b/src/src/Rendering/Core/DraggableActor.cpp
index e27776f..ac4ffb1 100644
--- a/src/src/Rendering/Core/DraggableActor.cpp
+++ b/src/src/Rendering/Core/DraggableActor.cpp
@@ -19,9 +19,11 @@
 vtkStandardNewMacro(DraggableActor)
 
 DraggableActor::DraggableActor()
-        : BaseDataPoints(vtkPoints::New()), renderPoints(vtkPoints::New()), tempStorePoints(nullptr),
-          renderData(vtkPolyData::New()), actor2D(vtkActor2D::New()), shadow2D(vtkActor2D::New()),
-          senseArea(vtkActor2D::New()), text(nullptr), Renderer(nullptr), OnDrag(nullptr), OnDragEnd(nullptr) {
+    : BaseDataPoints(vtkPoints::New()), renderPoints(vtkPoints::New()), tempStorePoints(nullptr),
+      renderData(vtkPolyData::New()), actor2D(vtkActor2D::New()), shadow2D(vtkActor2D::New()),
+      senseArea(vtkActor2D::New()), text(nullptr), Renderer(nullptr), OnDrag(nullptr), OnDragEnd(nullptr),
+      controlledActor(nullptr)
+{
     //if (Renderer) Renderer->RemoveViewProp(this);
     vtkNew<vtkPolyDataMapper2D> mapper;
     mapper->SetInputData(renderData);
@@ -251,3 +253,5 @@ void DraggableActor::Show() {
 
 
 
+
+
diff --git a/src/src/Rendering/Core/DraggableActor.h b/src/src/Rendering/Core/DraggableActor.h
index 82eabba..dc2178b 100644
--- a/src/src/Rendering/Core/DraggableActor.h
+++ b/src/src/Rendering/Core/DraggableActor.h
@@ -135,6 +135,9 @@ public:
     void Show();
 
     vtkSetClampMacro(MapMode,PointMapMode,MapToSlice,MapToWorld);
+
+    vtkSetObjectMacro(controlledActor,DraggableActor);
+    vtkGetObjectMacro(controlledActor,DraggableActor);
 protected:
     DraggableActor();
 
@@ -168,6 +171,8 @@ private:
     DragCallBack OnDrag = nullptr;
 
     DragCallBack OnDragEnd = nullptr;
+
+    DraggableActor * controlledActor;
 };
 
 
diff --git a/src/src/Rendering/Measure/AngleAnnotationActor.cpp b/src/src/Rendering/Measure/AngleAnnotationActor.cpp
index ca1b707..f45be10 100644
--- a/src/src/Rendering/Measure/AngleAnnotationActor.cpp
+++ b/src/src/Rendering/Measure/AngleAnnotationActor.cpp
@@ -14,16 +14,10 @@
 
 #include "Rendering/Core/ControlPointActor.h"
 
-
 vtkStandardNewMacro(AngleAnnotationActor)
 
 AngleAnnotationActor::AngleAnnotationActor()
-: DraggableActor()
-, controlP1(ControlPointActor::New())
-, controlP2(ControlPointActor::New())
-, controlP3(ControlPointActor::New())
-, textProperty(nullptr)
-, placedPointCount(0)
+    : DraggableActor(), controlP1(ControlPointActor::New()), controlP2(ControlPointActor::New()), controlP3(ControlPointActor::New()), textProperty(nullptr), placedPointCount(0)
 {
 
     text = vtkActor2D::New();
@@ -226,4 +220,13 @@ void AngleAnnotationActor::selfDragCb(vtkObject *, unsigned long, void *data) {
     pos = pts->GetPoint(2);
     MapScreenPointToWorld(pos[0], pos[1], this->Renderer, result);
     controlP3->SetWorldPosition(result);
+}
+
+void AngleAnnotationActor::ForceDelete()
+{
+    controlP1->SetcontrolledActor(nullptr);
+    controlP2->SetcontrolledActor(nullptr);
+    controlP3->SetcontrolledActor(nullptr);
+    this->SetRenderer(nullptr);
+    Delete();
 }
\ No newline at end of file
diff --git a/src/src/Rendering/Measure/AngleAnnotationActor.h b/src/src/Rendering/Measure/AngleAnnotationActor.h
index 8a5b647..a62dbf4 100644
--- a/src/src/Rendering/Measure/AngleAnnotationActor.h
+++ b/src/src/Rendering/Measure/AngleAnnotationActor.h
@@ -53,10 +53,7 @@ vtkTypeMacro(AngleAnnotationActor, DraggableActor);
 
     NextMeasureMacro(AngleAnnotationActor);
 
-    void ForceDelete() override {
-        this->SetRenderer(nullptr);
-        DraggableActor::Delete();
-    }
+    void ForceDelete() override;
 
 protected:
     AngleAnnotationActor();
diff --git a/src/src/Rendering/Measure/ArrowAnnotationActor.cpp b/src/src/Rendering/Measure/ArrowAnnotationActor.cpp
index dc73654..3f8d6af 100644
--- a/src/src/Rendering/Measure/ArrowAnnotationActor.cpp
+++ b/src/src/Rendering/Measure/ArrowAnnotationActor.cpp
@@ -21,7 +21,9 @@ ArrowAnnotationActor::ArrowAnnotationActor()
     shadow2D->GetProperty()->SetLineWidth(5.0);
 
     arrowRenderPoints->SetNumberOfPoints(2);
+    controlP1->SetcontrolledActor(nullptr);
     controlP1->Delete();
+    controlP2->SetcontrolledActor(nullptr);
     controlP2->Delete();
     controlP1 = ControlPointRActor::New();
     controlP2 = ControlPointRActor::New();
diff --git a/src/src/Rendering/Measure/EllipseAnnotationActor.cpp b/src/src/Rendering/Measure/EllipseAnnotationActor.cpp
index 66efba4..7428cb1 100644
--- a/src/src/Rendering/Measure/EllipseAnnotationActor.cpp
+++ b/src/src/Rendering/Measure/EllipseAnnotationActor.cpp
@@ -293,7 +293,7 @@ void EllipseAnnotationActor::drawCircle(double *p1, double *p2) {
     }
     double angle = 0;
     int id = 0;
-    while (angle <= 2.0 * vtkMath::Pi() + (2.0 * vtkMath::Pi() / (GRANULARITY * 1.0))) {
+    while (id<=GRANULARITY) {
         double p[3]={0};
         p[0] = p1[0];
         p[1] = p1[1];
@@ -656,6 +656,16 @@ bool EllipseAnnotationActor::onMeasureLeftButtonUp(vtkRenderWindowInteractor *ir
     return false;
 }
 
+void EllipseAnnotationActor::ForceDelete()
+{
+    controlP_lt->SetcontrolledActor(nullptr);
+    controlP_rt->SetcontrolledActor(nullptr);
+    controlP_lb->SetcontrolledActor(nullptr);
+    controlP_rb->SetcontrolledActor(nullptr);
+    SetRenderer(nullptr);
+    Delete();
+}
+
 void EllipseAnnotationActor::Transform(float x, float y) {
     DraggableActor::Transform(x, y);
     this->controlPointsTransform(x, y);
diff --git a/src/src/Rendering/Measure/EllipseAnnotationActor.h b/src/src/Rendering/Measure/EllipseAnnotationActor.h
index 3586e69..a8dcab3 100644
--- a/src/src/Rendering/Measure/EllipseAnnotationActor.h
+++ b/src/src/Rendering/Measure/EllipseAnnotationActor.h
@@ -40,6 +40,8 @@ public:
 
     bool onMeasureLeftButtonUp(vtkRenderWindowInteractor *) override;
 
+    void ForceDelete() override;
+
     NextMeasureMacro(EllipseAnnotationActor);
 protected:
     EllipseAnnotationActor();
diff --git a/src/src/Rendering/Measure/LineAnnotationActor.cpp b/src/src/Rendering/Measure/LineAnnotationActor.cpp
index 634158f..9956a2d 100644
--- a/src/src/Rendering/Measure/LineAnnotationActor.cpp
+++ b/src/src/Rendering/Measure/LineAnnotationActor.cpp
@@ -12,7 +12,8 @@
 vtkStandardNewMacro(LineAnnotationActor)
 
 LineAnnotationActor::LineAnnotationActor()
-        : DraggableActor(), controlP1(ControlPointActor::New()), controlP2(ControlPointActor::New()) {
+    : DraggableActor(), controlP1(ControlPointActor::New()), controlP2(ControlPointActor::New())
+{
     BaseDataPoints->SetNumberOfPoints(2);
     BaseDataPoints->SetPoint(0, 0, 0, 0);
     BaseDataPoints->SetPoint(1, 512, 512, 0);
@@ -31,7 +32,6 @@ LineAnnotationActor::~LineAnnotationActor() {
     controlP1 = nullptr;
     controlP2->Delete();
     controlP2 = nullptr;
-
 }
 
 void LineAnnotationActor::SetWorldPosition1(double x, double y, double z) {
@@ -120,3 +120,11 @@ bool LineAnnotationActor::onMeasureLeftButtonDown(vtkRenderWindowInteractor *ire
 bool LineAnnotationActor::onMeasureLeftButtonUp(vtkRenderWindowInteractor *iren) {
     return false;
 }
+
+void LineAnnotationActor::ForceDelete()
+{
+    controlP1->SetcontrolledActor(nullptr);
+    controlP2->SetcontrolledActor(nullptr);
+    SetRenderer(nullptr);
+    Delete();
+}
diff --git a/src/src/Rendering/Measure/LineAnnotationActor.h b/src/src/Rendering/Measure/LineAnnotationActor.h
index 980e11d..52c4770 100644
--- a/src/src/Rendering/Measure/LineAnnotationActor.h
+++ b/src/src/Rendering/Measure/LineAnnotationActor.h
@@ -42,10 +42,7 @@ public:
 
     NextMeasureMacro(LineAnnotationActor);
 
-    void ForceDelete() override {
-        this->SetRenderer(nullptr);
-        DraggableActor::Delete();
-    }
+    void ForceDelete() override;
 
 protected:
     LineAnnotationActor();
diff --git a/src/src/Rendering/Measure/OpenPolyAnnotationActor.h b/src/src/Rendering/Measure/OpenPolyAnnotationActor.h
index a960cab..b2ab578 100644
--- a/src/src/Rendering/Measure/OpenPolyAnnotationActor.h
+++ b/src/src/Rendering/Measure/OpenPolyAnnotationActor.h
@@ -47,7 +47,6 @@ public:
 
     void ForceDelete() override {
         this->SetRenderer(nullptr);
-        printf("OpenPolyAnnotationActor delete \r\n");
         Delete();
     }
 
diff --git a/src/src/Rendering/Measure/RoundAnnotationActor.cpp b/src/src/Rendering/Measure/RoundAnnotationActor.cpp
index 1844a85..b3cf534 100644
--- a/src/src/Rendering/Measure/RoundAnnotationActor.cpp
+++ b/src/src/Rendering/Measure/RoundAnnotationActor.cpp
@@ -76,7 +76,18 @@ void RoundAnnotationActor::BuildShape() {
     }
 }
 
-RoundAnnotationActor::RoundAnnotationActor() {
+void RoundAnnotationActor::ForceDelete()
+{
+    controlP_lt->SetcontrolledActor(nullptr);
+    controlP_rt->SetcontrolledActor(nullptr);
+    controlP_lb->SetcontrolledActor(nullptr);
+    controlP_rb->SetcontrolledActor(nullptr);
+    SetRenderer(nullptr);
+    Delete();
+}
+
+RoundAnnotationActor::RoundAnnotationActor()
+{
     controlP_rt = ControlPointActor::New();
     controlP_lb = ControlPointActor::New();
     controlP_rb = ControlPointActor::New();
@@ -279,7 +290,7 @@ void RoundAnnotationActor::drawCircle(double *p1, double *p2) {
     
     double angle = 0;
     int id = 0;
-    while (angle <= 2.0 * vtkMath::Pi() + (2.0 * vtkMath::Pi() / (GRANULARITY * 1.0))) {
+    while (id<=GRANULARITY) {
         double p[3]={0};
         p[0] = p1[0];
         p[1] = p1[1];
diff --git a/src/src/Rendering/Measure/RoundAnnotationActor.h b/src/src/Rendering/Measure/RoundAnnotationActor.h
index 90b692b..078c422 100644
--- a/src/src/Rendering/Measure/RoundAnnotationActor.h
+++ b/src/src/Rendering/Measure/RoundAnnotationActor.h
@@ -38,6 +38,8 @@ public:
     bool onMeasureLeftButtonUp(vtkRenderWindowInteractor *) override;
 
     NextMeasureMacro(RoundAnnotationActor);
+
+    void ForceDelete() override;
 protected:
     RoundAnnotationActor();
 
diff --git a/src/src/Rendering/Measure/TextAnnotationActor.cpp b/src/src/Rendering/Measure/TextAnnotationActor.cpp
index ec2cd45..3e6d1f8 100644
--- a/src/src/Rendering/Measure/TextAnnotationActor.cpp
+++ b/src/src/Rendering/Measure/TextAnnotationActor.cpp
@@ -69,7 +69,14 @@ void TextAnnotationActor::ResetTextProp() {
     mTextProperty->SetBackgroundOpacity(0.0);
 }
 
-TextAnnotationActor::TextAnnotationActor() {
+void TextAnnotationActor::ForceDelete()
+{
+    SetRenderer(nullptr);
+    Delete();
+}
+
+TextAnnotationActor::TextAnnotationActor()
+{
     BaseDataPoints->SetNumberOfPoints(2);
     BaseDataPoints->SetPoint(0, 0, 0, 0);
     BaseDataPoints->SetPoint(1, 512, 512, 0);
@@ -86,7 +93,6 @@ TextAnnotationActor::TextAnnotationActor() {
     ResetTextProp();
 }
 
-
 TextAnnotationActor::~TextAnnotationActor() {
     mTextProperty = nullptr;
     text->Delete();
diff --git a/src/src/Rendering/Measure/TextAnnotationActor.h b/src/src/Rendering/Measure/TextAnnotationActor.h
index abf9f3d..8c5f385 100644
--- a/src/src/Rendering/Measure/TextAnnotationActor.h
+++ b/src/src/Rendering/Measure/TextAnnotationActor.h
@@ -59,6 +59,8 @@ vtkTypeMacro(TextAnnotationActor, DraggableActor);
     bool onMeasureLeftButtonUp(vtkRenderWindowInteractor *) override;
 
     NextMeasureMacro(TextAnnotationActor);
+
+    void ForceDelete() override;
 protected:
     TextAnnotationActor();