0028890: Visualization - After closing all views and then display the view again...

DeviceLost flag has been moved from Graphic3d_GraphicDriver to Graphic3d_StructureManager,
so that all Viewers sharing the same Driver instance are properly invalidated.

Fixed clearing of objects by vclear command in case of multiple Viewers.

diff --git a/src/D3DHost/D3DHost_GraphicDriver.cxx b/src/D3DHost/D3DHost_GraphicDriver.cxx
index d2f232f4ab9cacb3b20599561d5b9734f5e86d0b..76a878952c5aa6452e25f99fb542d1becb08e8d5 100644 (file)
--- a/src/D3DHost/D3DHost_GraphicDriver.cxx
+++ b/src/D3DHost/D3DHost_GraphicDriver.cxx
@@ -49,7 +49,7 @@ D3DHost_GraphicDriver::~D3DHost_GraphicDriver()
 // =======================================================================
 Handle(Graphic3d_CView) D3DHost_GraphicDriver::CreateView (const Handle(Graphic3d_StructureManager)& theMgr)
 {
-  Handle(D3DHost_View) aView = new D3DHost_View (theMgr, this, myCaps, myDeviceLostFlag, &myStateCounter);
+  Handle(D3DHost_View) aView = new D3DHost_View (theMgr, this, myCaps, &myStateCounter);
 
   myMapOfView.Add (aView);
 

diff --git a/src/D3DHost/D3DHost_View.cxx b/src/D3DHost/D3DHost_View.cxx
index 1c1d5c29286a6cc658af3480a17c6486e94d18aa..e92d4249b2070e05b4e341e909ed010f9392b600 100644 (file)
--- a/src/D3DHost/D3DHost_View.cxx
+++ b/src/D3DHost/D3DHost_View.cxx
@@ -47,9 +47,8 @@ TCollection_AsciiString D3DHost_View::d3dFormatError (const long theErrCode)
 D3DHost_View::D3DHost_View (const Handle(Graphic3d_StructureManager)& theMgr,
                             const Handle(D3DHost_GraphicDriver)& theDriver,
                             const Handle(OpenGl_Caps)& theCaps,
-                            Standard_Boolean& theDeviceLostFlag,
                             OpenGl_StateCounter* theCounter)
-: OpenGl_View (theMgr, theDriver, theCaps, theDeviceLostFlag, theCounter),
+: OpenGl_View (theMgr, theDriver, theCaps, theCounter),
   myD3dLib      (NULL),
   myD3dDevice   (NULL),
   myD3dParams   (new D3DPRESENT_PARAMETERS()),

diff --git a/src/D3DHost/D3DHost_View.hxx b/src/D3DHost/D3DHost_View.hxx
index 0e148512325f40cd0d134022efc5b4fb5f2667ae..8a7ac76a9b2ada4d135a21579c8b450afbd28fa6 100644 (file)
--- a/src/D3DHost/D3DHost_View.hxx
+++ b/src/D3DHost/D3DHost_View.hxx
@@ -35,7 +35,6 @@ public:
   Standard_EXPORT D3DHost_View (const Handle(Graphic3d_StructureManager)& theMgr,
                                 const Handle(D3DHost_GraphicDriver)& theDriver,
                                 const Handle(OpenGl_Caps)& theCaps,
-                                Standard_Boolean& theDeviceLostFlag,
                                 OpenGl_StateCounter* theCounter);
 
   //! Default destructor.

diff --git a/src/Graphic3d/Graphic3d_GraphicDriver.cxx b/src/Graphic3d/Graphic3d_GraphicDriver.cxx
index ec56f6b6ec897472c5ed10aa670ae3c23ac8ed13..773f49dcffe59cf9c74a26cb8858de6e677d87a0 100644 (file)
--- a/src/Graphic3d/Graphic3d_GraphicDriver.cxx
+++ b/src/Graphic3d/Graphic3d_GraphicDriver.cxx
@@ -23,8 +23,7 @@ IMPLEMENT_STANDARD_RTTIEXT(Graphic3d_GraphicDriver,Standard_Transient)
 // purpose  :
 // =======================================================================
 Graphic3d_GraphicDriver::Graphic3d_GraphicDriver (const Handle(Aspect_DisplayConnection)& theDisp)
-: myDisplayConnection (theDisp),
-  myDeviceLostFlag    (Standard_False)
+: myDisplayConnection (theDisp)
 {
   //
 }
@@ -38,24 +37,6 @@ const Handle(Aspect_DisplayConnection)& Graphic3d_GraphicDriver::GetDisplayConne
   return myDisplayConnection;
 }
 
-// =======================================================================
-// function : IsDeviceLost
-// purpose  :
-// =======================================================================
-Standard_Boolean Graphic3d_GraphicDriver::IsDeviceLost() const
-{
-  return myDeviceLostFlag;
-}
-
-// =======================================================================
-// function : ResetDeviceLostFlag
-// purpose  :
-// =======================================================================
-void Graphic3d_GraphicDriver::ResetDeviceLostFlag()
-{
-  myDeviceLostFlag = Standard_False;
-}
-
 // =======================================================================
 // function : NewIdentification
 // purpose  :

diff --git a/src/Graphic3d/Graphic3d_GraphicDriver.hxx b/src/Graphic3d/Graphic3d_GraphicDriver.hxx
index 8de59830207c8c7d344379d557f2168535a45d24..dd240035b5793556fe5ca306db2cfd02c0757be2 100644 (file)
--- a/src/Graphic3d/Graphic3d_GraphicDriver.hxx
+++ b/src/Graphic3d/Graphic3d_GraphicDriver.hxx
@@ -138,10 +138,6 @@ public:
 
   //! returns Handle to display connection
   Standard_EXPORT const Handle(Aspect_DisplayConnection)& GetDisplayConnection() const;
-  
-  Standard_EXPORT Standard_Boolean IsDeviceLost() const;
-  
-  Standard_EXPORT void ResetDeviceLostFlag();
 
   //! Returns a new identification number for a new structure.
   Standard_EXPORT Standard_Integer NewIdentification();
@@ -152,28 +148,15 @@ public:
   DEFINE_STANDARD_RTTIEXT(Graphic3d_GraphicDriver,Standard_Transient)
 
 protected:
-
   
   //! Initializes the Driver
   Standard_EXPORT Graphic3d_GraphicDriver(const Handle(Aspect_DisplayConnection)& theDisp);
 
-  Handle(Aspect_DisplayConnection) myDisplayConnection;
-  Standard_Boolean myDeviceLostFlag;
+protected:
 
+  Handle(Aspect_DisplayConnection) myDisplayConnection;
   Aspect_GenId myStructGenId;
 
-
-private:
-
-
-
-
 };
 
-
-
-
-
-
-
 #endif // _Graphic3d_GraphicDriver_HeaderFile

diff --git a/src/Graphic3d/Graphic3d_StructureManager.cxx b/src/Graphic3d/Graphic3d_StructureManager.cxx
index 61b90bb1a5c03c2542fd3c2377148deea3c41d58..081f726e99156e88f34040cc2805f2f5784571e1 100644 (file)
--- a/src/Graphic3d/Graphic3d_StructureManager.cxx
+++ b/src/Graphic3d/Graphic3d_StructureManager.cxx
@@ -30,7 +30,8 @@ IMPLEMENT_STANDARD_RTTIEXT(Graphic3d_StructureManager,Standard_Transient)
 // ========================================================================
 Graphic3d_StructureManager::Graphic3d_StructureManager (const Handle(Graphic3d_GraphicDriver)& theDriver)
 : myViewGenId (0, 31),
-  myGraphicDriver (theDriver)
+  myGraphicDriver (theDriver),
+  myDeviceLostFlag (Standard_False)
 {
   //
 }
@@ -149,9 +150,10 @@ const Handle(Graphic3d_GraphicDriver)& Graphic3d_StructureManager::GraphicDriver
 
 void Graphic3d_StructureManager::RecomputeStructures()
 {
+  myDeviceLostFlag = Standard_False;
+
   // Go through all unique structures including child (connected) ones and ensure that they are computed.
   Graphic3d_MapOfStructure aStructNetwork;
-
   for (Graphic3d_MapIteratorOfMapOfStructure anIter(myDisplayedStructure); anIter.More(); anIter.Next())
   {
     Handle(Graphic3d_Structure) aStructure = anIter.Key();

diff --git a/src/Graphic3d/Graphic3d_StructureManager.hxx b/src/Graphic3d/Graphic3d_StructureManager.hxx
index 6abdcb73ec9739357f9619a625c8c2a32bedd6bb..c5b7e87ecab00fcf70ce7cf265a76e86c9b89974 100644 (file)
--- a/src/Graphic3d/Graphic3d_StructureManager.hxx
+++ b/src/Graphic3d/Graphic3d_StructureManager.hxx
@@ -38,10 +38,6 @@ typedef NCollection_IndexedMap<Graphic3d_CView*> Graphic3d_IndexedMapOfView;
 class Graphic3d_GraphicDriver;
 class Graphic3d_Structure;
 class Graphic3d_DataStructureManager;
-class Standard_Transient;
-
-class Graphic3d_StructureManager;
-DEFINE_STANDARD_HANDLE(Graphic3d_StructureManager, Standard_Transient)
 
 //! This class allows the definition of a manager to
 //! which the graphic objects are associated.
@@ -51,6 +47,8 @@ DEFINE_STANDARD_HANDLE(Graphic3d_StructureManager, Standard_Transient)
 //! Destroy, Highlight, Visible
 class Graphic3d_StructureManager : public Standard_Transient
 {
+  friend class Graphic3d_Structure;
+  DEFINE_STANDARD_RTTIEXT(Graphic3d_StructureManager, Standard_Transient)
 public:
 
   //! Initializes the ViewManager.
@@ -144,6 +142,8 @@ public:
   //! Suppresses the highlighting on all the structures in <me>.
   Standard_EXPORT virtual void UnHighlight();
 
+  //! Recomputes all structures in the manager.
+  //! Resets Device Lost flag.
   Standard_EXPORT void RecomputeStructures();
 
   //! Recomputes all structures from theStructures.
@@ -155,9 +155,11 @@ public:
 
   Standard_EXPORT Handle(Graphic3d_ViewAffinity) ObjectAffinity (const Handle(Standard_Transient)& theObject) const;
 
-  friend class Graphic3d_Structure;
+  //! Returns TRUE if Device Lost flag has been set and presentation data should be reuploaded onto graphics driver.
+  Standard_Boolean IsDeviceLost() const { return myDeviceLostFlag; }
 
-  DEFINE_STANDARD_RTTIEXT(Graphic3d_StructureManager,Standard_Transient)
+  //! Sets Device Lost flag.
+  void SetDeviceLost() { myDeviceLostFlag = Standard_True; }
 
 protected:
 
@@ -174,6 +176,9 @@ protected:
   Graphic3d_MapOfObject myRegisteredObjects;
   Handle(Graphic3d_GraphicDriver) myGraphicDriver;
   Graphic3d_IndexedMapOfView myDefinedViews;
+  Standard_Boolean myDeviceLostFlag;
 };
 
+DEFINE_STANDARD_HANDLE(Graphic3d_StructureManager, Standard_Transient)
+
 #endif // _Graphic3d_StructureManager_HeaderFile

diff --git a/src/OpenGl/OpenGl_GraphicDriver.cxx b/src/OpenGl/OpenGl_GraphicDriver.cxx
index a409eb19c581fd8e89c4f8bd2cae9d7c1fe9d12f..0912755d62c77f432ca59bba11e879b239022a3a 100644 (file)
--- a/src/OpenGl/OpenGl_GraphicDriver.cxx
+++ b/src/OpenGl/OpenGl_GraphicDriver.cxx
@@ -29,6 +29,7 @@
 
 #include <Aspect_GraphicDeviceDefinitionError.hxx>
 #include <Aspect_IdentDefinitionError.hxx>
+#include <Graphic3d_StructureManager.hxx>
 #include <Message_Messenger.hxx>
 #include <OSD_Environment.hxx>
 #include <Standard_NotImplemented.hxx>
@@ -218,12 +219,17 @@ void OpenGl_GraphicDriver::ReleaseContext()
     OpenGl_Structure* aStruct = aStructIt.ChangeValue();
     aStruct->ReleaseGlResources (aCtxShared);
   }
-  myDeviceLostFlag = myDeviceLostFlag || !myMapOfStructure.IsEmpty();
 
+  const bool isDeviceLost = !myMapOfStructure.IsEmpty();
   for (NCollection_Map<Handle(OpenGl_View)>::Iterator aViewIter (myMapOfView);
        aViewIter.More(); aViewIter.Next())
   {
     const Handle(OpenGl_View)& aView = aViewIter.Value();
+    if (isDeviceLost)
+    {
+      aView->StructureManager()->SetDeviceLost();
+    }
+
     const Handle(OpenGl_Window)& aWindow = aView->GlWindow();
     if (aWindow.IsNull())
     {
@@ -730,7 +736,7 @@ void OpenGl_GraphicDriver::RemoveStructure (Handle(Graphic3d_CStructure)& theCSt
 // =======================================================================
 Handle(Graphic3d_CView) OpenGl_GraphicDriver::CreateView (const Handle(Graphic3d_StructureManager)& theMgr)
 {
-  Handle(OpenGl_View) aView = new OpenGl_View (theMgr, this, myCaps, myDeviceLostFlag, &myStateCounter);
+  Handle(OpenGl_View) aView = new OpenGl_View (theMgr, this, myCaps, &myStateCounter);
 
   myMapOfView.Add (aView);
 
@@ -792,7 +798,11 @@ void OpenGl_GraphicDriver::RemoveView (const Handle(Graphic3d_CView)& theView)
       OpenGl_Structure* aStruct = aStructIt.ChangeValue();
       aStruct->ReleaseGlResources (aCtx);
     }
-    myDeviceLostFlag = !myMapOfStructure.IsEmpty();
+
+    if (!myMapOfStructure.IsEmpty())
+    {
+      aView->StructureManager()->SetDeviceLost();
+    }
   }
 }
 
@@ -872,3 +882,24 @@ Standard_Boolean OpenGl_GraphicDriver::ViewExists (const Handle(Aspect_Window)&
 
   return isExist;
 }
+
+//=======================================================================
+//function : setDeviceLost
+//purpose  :
+//=======================================================================
+void OpenGl_GraphicDriver::setDeviceLost()
+{
+  if (myMapOfStructure.IsEmpty())
+  {
+    return;
+  }
+
+  for (NCollection_Map<Handle(OpenGl_View)>::Iterator aViewIter (myMapOfView); aViewIter.More(); aViewIter.Next())
+  {
+    const Handle(OpenGl_View)& aView = aViewIter.Value();
+    if (aView->myWasRedrawnGL)
+    {
+      aView->StructureManager()->SetDeviceLost();
+    }
+  }
+}

diff --git a/src/OpenGl/OpenGl_GraphicDriver.hxx b/src/OpenGl/OpenGl_GraphicDriver.hxx
index 5000619a260285e62ef48332b5800ccbea1a4646..49823479a930071326e2aa562b698e34f2874a5e 100644 (file)
--- a/src/OpenGl/OpenGl_GraphicDriver.hxx
+++ b/src/OpenGl/OpenGl_GraphicDriver.hxx
@@ -74,13 +74,10 @@ private:
   Standard_Size myCounter;
 };
 
-class OpenGl_GraphicDriver;
-
-DEFINE_STANDARD_HANDLE(OpenGl_GraphicDriver,Graphic3d_GraphicDriver)
-
 //! This class defines an OpenGl graphic driver
 class OpenGl_GraphicDriver : public Graphic3d_GraphicDriver
 {
+  DEFINE_STANDARD_RTTIEXT(OpenGl_GraphicDriver, Graphic3d_GraphicDriver)
 public:
 
   //! Constructor.
@@ -200,9 +197,8 @@ public:
   //! Insert index layer at proper position.
   Standard_EXPORT void addZLayerIndex (const Graphic3d_ZLayerId theLayerId);
 
-public:
-
-  DEFINE_STANDARD_RTTIEXT(OpenGl_GraphicDriver,Graphic3d_GraphicDriver)
+  //! Set device lost flag for redrawn views.
+  Standard_EXPORT void setDeviceLost();
 
 public:
 
@@ -234,4 +230,6 @@ protected:
 
 };
 
+DEFINE_STANDARD_HANDLE(OpenGl_GraphicDriver, Graphic3d_GraphicDriver)
+
 #endif //_OpenGl_GraphicDriver_HeaderFile

diff --git a/src/OpenGl/OpenGl_View.cxx b/src/OpenGl/OpenGl_View.cxx
index 24de9fec7f7b8bf323da41d6fff0ddec226e47bf..41af8b036590d308d0e46157db76c5430cbe3006 100644 (file)
--- a/src/OpenGl/OpenGl_View.cxx
+++ b/src/OpenGl/OpenGl_View.cxx
@@ -49,12 +49,10 @@ IMPLEMENT_STANDARD_RTTIEXT(OpenGl_View,Graphic3d_CView)
 OpenGl_View::OpenGl_View (const Handle(Graphic3d_StructureManager)& theMgr,
                           const Handle(OpenGl_GraphicDriver)& theDriver,
                           const Handle(OpenGl_Caps)& theCaps,
-                          Standard_Boolean& theDeviceLostFlag,
                           OpenGl_StateCounter* theCounter)
 : Graphic3d_CView  (theMgr),
   myDriver         (theDriver.operator->()),
   myCaps           (theCaps),
-  myDeviceLostFlag (theDeviceLostFlag),
   myWasRedrawnGL   (Standard_False),
   myCulling        (Standard_True),
   myShadingModel   (Graphic3d_TOSM_FACET),

diff --git a/src/OpenGl/OpenGl_View.hxx b/src/OpenGl/OpenGl_View.hxx
index 03f30c7e3dc4f09bf7fd8e108a2e2689488e5c93..0607e2690ea92e02e8cb02fcc109598021f2c950 100644 (file)
--- a/src/OpenGl/OpenGl_View.hxx
+++ b/src/OpenGl/OpenGl_View.hxx
@@ -74,7 +74,6 @@ public:
   Standard_EXPORT OpenGl_View (const Handle(Graphic3d_StructureManager)& theMgr,
                                const Handle(OpenGl_GraphicDriver)& theDriver,
                                const Handle(OpenGl_Caps)& theCaps,
-                               Standard_Boolean& theDeviceLostFlag,
                                OpenGl_StateCounter* theCounter);
 
   //! Default destructor.
@@ -470,7 +469,6 @@ protected:
   Handle(OpenGl_Window)    myWindow;
   Handle(OpenGl_Workspace) myWorkspace;
   Handle(OpenGl_Caps)      myCaps;
-  Standard_Boolean&        myDeviceLostFlag;
   Standard_Boolean         myWasRedrawnGL;
 
   Standard_Boolean                myCulling;

diff --git a/src/OpenGl/OpenGl_View_Redraw.cxx b/src/OpenGl/OpenGl_View_Redraw.cxx
index 1491a7cd4f3babd86c7167c46c377bfcea1648d8..6ad77f0959410360e9094f44e8339ba2d564d018 100644 (file)
--- a/src/OpenGl/OpenGl_View_Redraw.cxx
+++ b/src/OpenGl/OpenGl_View_Redraw.cxx
@@ -19,6 +19,7 @@
 #include <OpenGl_GlCore11.hxx>
 
 #include <Graphic3d_GraphicDriver.hxx>
+#include <Graphic3d_StructureManager.hxx>
 #include <Graphic3d_TextureParams.hxx>
 #include <Graphic3d_Texture2Dmanual.hxx>
 #include <Graphic3d_TransformUtils.hxx>
@@ -145,11 +146,9 @@ void OpenGl_View::Redraw()
   && !myCaps->vboDisable
   && !myCaps->keepArrayData)
   {
-    if (myWasRedrawnGL)
-    {
-      myDeviceLostFlag = Standard_True;
-    }
-
+    // caps are shared across all views, thus we need to invalidate all of them
+    // if (myWasRedrawnGL) { myStructureManager->SetDeviceLost(); }
+    myDriver->setDeviceLost();
     myCaps->keepArrayData = Standard_True;
   }
 

diff --git a/src/V3d/V3d_View.cxx b/src/V3d/V3d_View.cxx
index 3e85e84b4f3f46bf8301018b976b63e40f842eb9..acf06ef4db856502c2bf672debde08f36acc2f05 100644 (file)
--- a/src/V3d/V3d_View.cxx
+++ b/src/V3d/V3d_View.cxx
@@ -244,21 +244,19 @@ void V3d_View::Redraw() const
     return;
   }
 
-  Handle(Graphic3d_GraphicDriver)    aGraphicDriver = MyViewer->Driver();
   Handle(Graphic3d_StructureManager) aStructureMgr  = MyViewer->StructureManager();
   for (Standard_Integer aRetryIter = 0; aRetryIter < 2; ++aRetryIter)
   {
-    if (aGraphicDriver->IsDeviceLost())
+    if (aStructureMgr->IsDeviceLost())
     {
       aStructureMgr->RecomputeStructures();
-      aGraphicDriver->ResetDeviceLostFlag();
     }
 
     AutoZFit();
 
     myView->Redraw();
 
-    if (!aGraphicDriver->IsDeviceLost())
+    if (!aStructureMgr->IsDeviceLost())
     {
       return;
     }

diff --git a/src/ViewerTest/ViewerTest.cxx b/src/ViewerTest/ViewerTest.cxx
index 33a6078cff2f73f44c01d1d8386abe6291ef02be..7ef669cae5cd9dc42484521d5a3549f9fb5ef3a3 100644 (file)
--- a/src/ViewerTest/ViewerTest.cxx
+++ b/src/ViewerTest/ViewerTest.cxx
@@ -638,18 +638,38 @@ Handle(AIS_Shape) GetAISShapeFromName(const char* name)
 //==============================================================================
 void ViewerTest::Clear()
 {
-  if ( !a3DView().IsNull() ) {
-    ViewerTest_DoubleMapIteratorOfDoubleMapOfInteractiveAndName it(GetMapOfAIS());
-    while ( it.More() ) {
-      cout << "Remove " << it.Key2() << endl;
-      const Handle(AIS_InteractiveObject) anObj = Handle(AIS_InteractiveObject)::DownCast (it.Key1());
-      TheAISContext()->Remove(anObj,Standard_False);
-      it.Next();
-    }
-    TheAISContext()->RebuildSelectionStructs();
-    TheAISContext()->UpdateCurrentViewer();
+  if (a3DView().IsNull())
+  {
+    return;
+  }
+
+  NCollection_Sequence<Handle(AIS_InteractiveObject)> aListRemoved;
+  for (ViewerTest_DoubleMapIteratorOfDoubleMapOfInteractiveAndName anObjIter (GetMapOfAIS()); anObjIter.More(); anObjIter.Next())
+  {
+    const Handle(AIS_InteractiveObject) anObj = Handle(AIS_InteractiveObject)::DownCast (anObjIter.Key1());
+    if (anObj->GetContext() != TheAISContext())
+    {
+      continue;
+    }
+
+    std::cout << "Remove " << anObjIter.Key2() << std::endl;
+    TheAISContext()->Remove (anObj, Standard_False);
+    aListRemoved.Append (anObj);
+  }
+
+  TheAISContext()->RebuildSelectionStructs();
+  TheAISContext()->UpdateCurrentViewer();
+  if (aListRemoved.Size() == GetMapOfAIS().Extent())
+  {
     GetMapOfAIS().Clear();
   }
+  else
+  {
+    for (NCollection_Sequence<Handle(AIS_InteractiveObject)>::Iterator anObjIter (aListRemoved); anObjIter.More(); anObjIter.Next())
+    {
+      GetMapOfAIS().UnBind1 (anObjIter.Value());
+    }
+  }
 }
 
 //==============================================================================

diff --git a/src/ViewerTest/ViewerTest_ViewerCommands.cxx b/src/ViewerTest/ViewerTest_ViewerCommands.cxx
index 82f96783152d56b82399f752bb763d080d38ee20..02c113be66bc642ef36929ce568900490e00bc1a 100644 (file)
--- a/src/ViewerTest/ViewerTest_ViewerCommands.cxx
+++ b/src/ViewerTest/ViewerTest_ViewerCommands.cxx
@@ -1120,6 +1120,7 @@ void ViewerTest::RemoveView (const TCollection_AsciiString& theViewName, const S
 
   // Remove view resources
   ViewerTest_myViews.UnBind1(theViewName);
+  aView->Window()->Unmap();
   aView->Remove();
 
 #if !defined(_WIN32) && !defined(__WIN32__) && (!defined(__APPLE__) || defined(MACOSX_USE_GLX))

diff --git a/tests/bugs/vis/bug28890 b/tests/bugs/vis/bug28890
new file mode 100644 (file)
index 0000000..cbaa2cf
--- /dev/null
+++ b/tests/bugs/vis/bug28890
@@ -0,0 +1,42 @@
+puts "============"
+puts "0028890: Visualization - After closing all views and then display the view again, just the first view has object(s) displayed"
+puts "============"
+puts ""
+
+pload MODELING VISUALIZATION
+vclear
+vclose ALL
+box b1_1 0 0 0 1 2 3
+box b1_2 0 3 0 3 1 2
+box b2_1 0 0 0 3 1 2
+box b2_2 0 3 0 1 2 3
+
+# fill first Viewer
+vinit Driver1/Viewer1/View1
+vzbufftrihedron
+vdisplay -dispMode 1 b1_1 b1_2
+vfit
+vsetcolor b1_1 RED
+vsetcolor b1_2 GREEN
+
+# fill second Viewer
+vinit Driver1/Viewer2/View1
+vzbufftrihedron
+vdisplay -dispMode 1 b2_1 b2_2
+vfit
+vsetcolor b2_1 RED
+vsetcolor b2_2 GREEN
+
+# enable RayTracing which sets DeviceLost flag
+vactivate Driver1/Viewer1/View1
+vraytrace 1
+set aColor1 [vreadpixel 150 250 rgb]
+vdump $::imagedir/${::casename}_1.png
+
+vactivate Driver1/Viewer2/View1
+vraytrace 1
+set aColor2 [vreadpixel 150 250 rgb]
+vdump $::imagedir/${::casename}_2.png
+
+# check that DeviceLost flag is processed by both Viewers
+if { "$aColor1" != "$aColor2" } { puts "Error: colors should be equal" }