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/PrsMgr/PrsMgr_PresentableObject.cdl

@@ -234,6 +234,10 @@ is
    Transformation(me) returns any Trsf from gp;
    ---C++: inline
    ---C++: return const&
+
+   InversedTransformation(me) returns any Trsf from gp;
+   ---C++: inline
+   ---C++: return const&
    
    ResetTransformation(me:mutable)  is virtual;
    ---Purpose: resets local transformation to identity.
@@ -330,6 +334,7 @@ fields
  
     myLocalTransformation : Trsf from gp;     -- Own transformation of presentable object.
     myTransformation : Trsf from gp;          -- Combined transformation of presentable object.
+    myInvTransformation : Trsf from gp;       -- Inverted combined transformation of presentable object.
     myCombinedParentTransform : Trsf from gp; -- Combined transformation of presentable object excepting local transformation.
 
     myChildren : ListOfPresentableObjects from PrsMgr; -- Child objects in scene hierarchy.

src/PrsMgr/PrsMgr_PresentableObject.cxx

@@ -269,6 +269,7 @@ void PrsMgr_PresentableObject::SetCombinedParentTransform (const gp_Trsf& theTra
 void PrsMgr_PresentableObject::UpdateTransformation()
 {
   myTransformation = myCombinedParentTransform * myLocalTransformation;
+  myInvTransformation = myTransformation.Inverted();
   Handle(Geom_Transformation) aTrsf = new Geom_Transformation (myTransformation);
 
   for (Standard_Integer aPrsIter = 1; aPrsIter <= myPresentations.Length(); ++aPrsIter)

src/PrsMgr/PrsMgr_PresentableObject.lxx

@@ -28,6 +28,11 @@ inline const gp_Trsf& PrsMgr_PresentableObject::Transformation() const
   return myTransformation;
 }
 
+inline const gp_Trsf& PrsMgr_PresentableObject::InversedTransformation() const
+{
+  return myInvTransformation;
+}
+
 inline const PrsMgr_ListOfPresentableObjects& PrsMgr_PresentableObject::Children() const 
 {
   return myChildren;