0024322: TKOpenGl - light sources management inconsistency

Fixed pipeline - accumulate all ambient light sources.

Fix clearing of all light sources.

src/Visual3d/Visual3d_Light.cdl

@@ -292,23 +292,6 @@ is
 	-- Category: Class methods
 	--------------------------
 
-	Limit ( myclass )
-		returns Integer from Standard;
-	---Level: Internal
-	---Purpose: Maximum number of activatable light sources.
-	---Category: Class methods
-
-	----------------------------
-	-- Category: Private methods
-	----------------------------
-
-	Identification ( me )
-		returns Integer from Standard
-		is static private;
-	---Level: Internal
-	---Purpose: Returns the light identification.
-	---Category: Private methods
-
 	IsValid ( myclass;
 		  AAngle	: Real from Standard )
 		returns Boolean from Standard

src/Visual3d/Visual3d_Light.cxx

@@ -354,25 +354,6 @@ void Visual3d_Light::SetPosition (const Graphic3d_Vertex& thePos)
   myCLight.Position.z() = float (thePos.Z());
 }
 
-// =======================================================================
-// function : Limit
-// purpose  :
-// =======================================================================
-Standard_Integer Visual3d_Light::Limit()
-{
-  // Old method, replaced by GraphicDriver::InquireLightLimit()
-  return 0;
-}
-
-// =======================================================================
-// function : Identification
-// purpose  :
-// =======================================================================
-Standard_Integer Visual3d_Light::Identification() const
-{
-  return 0;
-}
-
 // =======================================================================
 // function : IsValid
 // purpose  :

src/Visual3d/Visual3d_View.cxx

@@ -730,6 +730,7 @@ void Visual3d_View::UpdateLights()
                                        MyGraphicDriver->InquireLightLimit());
   if (MyCView.Context.NbActiveLight < 1)
   {
+    MyGraphicDriver->SetLight (MyCView);
     return;
   }