0024623: Visualization - improve selection mechanism

Redesign of selection mechanism:
- implemented 3-level BVH tree for selection;
- selection now calculates in 3D space;
- intersection tests were moved to SelectMgr_BaseFrustum descendants;
- removed .cdl files in Select3D and .cdl related to selection in MeshVS;
- SelectMgr_ViewerSelectors are now shared between local and global contexts;
- transformations of sensitive entities are now stored in SelectMgr_SelectableObject only. Sensitive entities are independent from transformations, it is applied to SelectMgr_SelectingVolumeManager instance only;
- connected and multiple connected interactive objects are now represented by their child objects only for SelectMgr_SelectionManager;
- if interactive object has child objects, they will be stored as separate objects in SelectMgr_SelectionManager now.
- test cases bugs/vis/bug24623_1, bug24623_2, bug24623_3, bug24623_4 to test performance and memory issues.

src/SelectMgr/SelectMgr_SensitiveEntity.cxx

@@ -0,0 +1,74 @@
+// Created on: 2014-08-15
+// Created by: Varvara POSKONINA
+// Copyright (c) 2005-2014 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#include <SelectMgr_SensitiveEntity.hxx>
+
+//=======================================================================
+// function : SelectMgr_SensitiveEntity
+// purpose  : Creates new inactive for selection object with base entity
+//            theEntity
+//=======================================================================
+SelectMgr_SensitiveEntity::SelectMgr_SensitiveEntity (const Handle(SelectBasics_SensitiveEntity)& theEntity)
+{
+  mySensitive = theEntity;
+  myIsActiveForSelection = Standard_False;
+}
+
+//=======================================================================
+// function : Clear
+// purpose  : Clears up all the resources and memory
+//=======================================================================
+void SelectMgr_SensitiveEntity::Clear()
+{
+  mySensitive->Clear();
+  mySensitive.Nullify();
+}
+
+//=======================================================================
+// function : BaseSensitive
+// purpose  : Returns related instance of SelectBasics class
+//=======================================================================
+const Handle(SelectBasics_SensitiveEntity)& SelectMgr_SensitiveEntity::BaseSensitive() const
+{
+  return mySensitive;
+}
+
+//=======================================================================
+// function : IsActiveForSelection
+// purpose  : Returns true if this entity belongs to the active selection
+//            mode of parent object
+//=======================================================================
+const Standard_Boolean SelectMgr_SensitiveEntity::IsActiveForSelection() const
+{
+  return myIsActiveForSelection;
+}
+
+//=======================================================================
+// function : ResetSelectionActiveStatus
+// purpose  : Marks entity as inactive for selection
+//=======================================================================
+void SelectMgr_SensitiveEntity::ResetSelectionActiveStatus() const
+{
+  myIsActiveForSelection = Standard_False;
+}
+
+//=======================================================================
+// function : SetActiveForSelection
+// purpose  : Marks entity as active for selection
+//=======================================================================
+void SelectMgr_SensitiveEntity::SetActiveForSelection() const
+{
+  myIsActiveForSelection = Standard_True;
+}