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// ********************************************************************
// * License and Disclaimer                                           *
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//
//
// 
// Andrew Walkden  10th February 1997
// G4OpenGLImmediateSceneHandler - no Display lists.

#if defined (G4VIS_BUILD_OPENGL_DRIVER) || defined (G4VIS_USE_OPENGL)

#ifndef G4OPENGLIMMEDIATESCENEHANDLER_HH
#define G4OPENGLIMMEDIATESCENEHANDLER_HH

#include "G4OpenGLSceneHandler.hh"
#include "globals.hh"

class G4OpenGLImmediate;

class G4OpenGLImmediateSceneHandler: public G4OpenGLSceneHandler {

public:

  G4OpenGLImmediateSceneHandler (G4VGraphicsSystem& system, const G4String& name);
  virtual ~G4OpenGLImmediateSceneHandler ();
  void BeginPrimitives (const G4Transform3D& objectTransformation);
  void EndPrimitives ();
  void BeginPrimitives2D (const G4Transform3D& objectTransformation);
  void EndPrimitives2D ();
  void BeginModeling ();
  void EndModeling ();
  void AddPrimitive (const G4Polyline&);
  void AddPrimitive (const G4Polymarker&);
  void AddPrimitive (const G4Text& text);
  void AddPrimitive (const G4Circle&);
  void AddPrimitive (const G4Square&);
  void AddPrimitive (const G4Scale& scale);
  void AddPrimitive (const G4Polyhedron&);

protected:

  G4bool AddPrimitivePreamble(const G4VMarker& visible);
  G4bool AddPrimitivePreamble(const G4Polyline& visible);
  G4bool AddPrimitivePreamble(const G4Polyhedron& visible);

  void ClearTransientStore ();

  static G4int    fSceneIdCount;  // static counter for OpenGLImmediate scenes.
  private:
  bool AddPrimitivePreambleInternal(const G4Visible& visible, bool isMarker, bool isPolyline);
};

#endif

#endif
