From 2dfe5620ba85f46b0a9fd1e67726e04dd44bf904 Mon Sep 17 00:00:00 2001
From: Artem Zhidkov <Artem.Zhidkov@opencascade.com>
Date: Wed, 27 May 2020 16:20:36 +0300
Subject: [PATCH] Issue #3256: Hang up when displaying the model

Provide a workaround to eliminate the hang up.
---
 src/ModuleBase/ModuleBase_Tools.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/ModuleBase/ModuleBase_Tools.cpp b/src/ModuleBase/ModuleBase_Tools.cpp
index a3697ee37..08a9ef0ae 100644
--- a/src/ModuleBase/ModuleBase_Tools.cpp
+++ b/src/ModuleBase/ModuleBase_Tools.cpp
@@ -470,8 +470,12 @@ void setDefaultDeviationCoefficient(const TopoDS_Shape& theShape,
   double aDeflection;
   if (isConstruction)
     aDeflection = Config_PropManager::real("Visualization", "construction_deflection");
-  else
+  else {
     aDeflection = Config_PropManager::real("Visualization", "body_deflection");
+    // workaround (issue #3256): to avoid hang up on one of restricted models
+    // set the maximal deflection to be the same as a default body deflection
+    theDrawer->SetMaximalChordialDeviation(aDeflection);
+  }
 
   theDrawer->SetDeviationCoefficient(aDeflection);
 }
-- 
2.39.2