From bcb8de543fe44b9f55bf0cd931cc9a33f0189a0b Mon Sep 17 00:00:00 2001
From: kradchen <chenhuijun@eq9hj.com>
Date: Tue, 22 Jul 2025 09:44:24 +0800
Subject: [PATCH] perf: improve sync slice position function performance

---
 src/src/Interaction/ActorDraggableInteractorStyle.cpp | 1 -
 src/src/Rendering/Viewer/DICOMImageViewer.cxx         | 3 +--
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/src/Interaction/ActorDraggableInteractorStyle.cpp b/src/src/Interaction/ActorDraggableInteractorStyle.cpp
index 6b401ca..02f2bd8 100644
--- a/src/src/Interaction/ActorDraggableInteractorStyle.cpp
+++ b/src/src/Interaction/ActorDraggableInteractorStyle.cpp
@@ -501,7 +501,6 @@ void ActorDraggableInteractorStyle::AdjustSyncCrossPoint(double* aPoint)
         }
         else{
             CrossCursorAnnotationActor::SafeDownCast(dragProp)->Transform(aPoint[0] , aPoint[1] );
-            this->Interactor->Render();
         }
     }
 }
diff --git a/src/src/Rendering/Viewer/DICOMImageViewer.cxx b/src/src/Rendering/Viewer/DICOMImageViewer.cxx
index 98f66ab..91ebff3 100644
--- a/src/src/Rendering/Viewer/DICOMImageViewer.cxx
+++ b/src/src/Rendering/Viewer/DICOMImageViewer.cxx
@@ -663,8 +663,7 @@ void DICOMImageViewer::SyncSlicePointSameDirection(double *point) {
         Renderer->GetActiveCamera()->SetFocalPoint(f);
         this->UnActiveReferenceLine();
         this->InteractorStyle->AdjustSyncCrossPoint(displayPoint);
-        this->Render();
-        UpdateTopLeftCornerInfo();
+        UpdateTopLeftCornerInfo();// include render()
         Slice = ImageMapper->GetSliceNumber();
     }
 }