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// $Id: G4RayTracerSceneHandler.cc,v 1.10 2006/11/14 14:46:37 allison Exp $
// GEANT4 tag $Name:  $

#include "G4RayTracerSceneHandler.hh"
#include "G4VisManager.hh"

G4RayTracerSceneHandler::G4RayTracerSceneHandler(G4VGraphicsSystem& system,
						 const G4String& name):
  G4VSceneHandler(system, fSceneIdCount++, name)
{
  // Ray Tracer does not use the vis concept of scene (G4Scene) - keep
  // vis manager happy when someone opens a ray tracer with "/vis/open
  // RayTracer" but uses the ray tracer with "/vis/rayTracer" commands
  // before creating any scenes, for example, instead of using
  // "/vis/drawVolume"...
  G4VisManager* visManager = G4VisManager::GetInstance();
  if(visManager) {
    G4Scene* pScene = visManager->GetCurrentScene();
    if (!pScene) {
      // Create new scene like /vis/scene/create...
      fpScene = new G4Scene("dummy-ray-tracer-scene");
      // Add dummy run-duration model to avoid world being added and
      // notifyHandler being invoked...
      fpScene->AddWorldIfEmpty();
      // Avoid code triggered at end of events...
      fpScene->SetRefreshAtEndOfEvent(false);
      // Add to vis manager list; ownership thereby passes to vis manager...
      visManager->SetSceneList().push_back(fpScene);
      // ...and make current...
      visManager->SetCurrentScene(fpScene);
    }
  }
}

G4RayTracerSceneHandler::~G4RayTracerSceneHandler()
{}

G4int G4RayTracerSceneHandler::fSceneIdCount = 0;