// This code implementation is the intellectual property of
// the GEANT4 collaboration.
//
// By copying, distributing or modifying the Program (or any work
// based on the Program) you indicate your acceptance of this statement,
// and all its terms.
//
// $Id: G4OpenGLSceneHandler.hh,v 1.7 2001/01/18 11:59:00 johna Exp $
// GEANT4 tag $Name: geant4-03-01 $
//
// 
// Andrew Walkden  27th March 1996
// OpenGL scene handler - base for immediate mode and stored mode classes to
//                        inherit from.

#ifdef G4VIS_BUILD_OPENGL_DRIVER

#ifndef G4OPENGLSCENEHANDLER_HH
#define G4OPENGLSCENEHANDLER_HH

#include "G4VSceneHandler.hh"
#include "G4OpenGLViewer.hh"
#include "globals.hh"
#include "G4RotationMatrix.hh"

#include <GL/gl.h>
#include <GL/glx.h>
#include <GL/glu.h>

// Base class for various OpenGLScene classes.
class G4OpenGLSceneHandler: public G4VSceneHandler {

public:
  void AddPrimitive (const G4Polyline&);
  void AddPrimitive (const G4Text&);
  void AddPrimitive (const G4Circle&);
  void AddPrimitive (const G4Square&);
  void AddPrimitive (const G4Polyhedron&);
  void AddPrimitive (const G4NURBS&);
  void AddPrimitive (const G4Polymarker&);

  void AddThis (const G4Box&);
  void AddThis (const G4Cons&);
  void AddThis (const G4Tubs&);
  void AddThis (const G4Trd&);
  void AddThis (const G4Trap&);
  void AddThis (const G4Sphere&);
  void AddThis (const G4Para&);
  void AddThis (const G4Torus&);
  void AddThis (const G4Polycone&);
  void AddThis (const G4Polyhedra&);
  void AddThis (const G4VSolid&);

protected:
  G4OpenGLSceneHandler (G4VGraphicsSystem& system,
			G4int id,
			const G4String& name = "");
  virtual ~G4OpenGLSceneHandler ();
  G4bool initialize_hlr;

private:
  void AddCircleSquare (const G4VMarker&, G4int nSides);
  /**************************************************
  Not needed - but see note on future development in .cc.
  void DrawScreenPolygon (G4double size,
		          const G4Point3D& centre,
		          G4int nSides);
  // Draws in screen coordinates.
  *********************************/

  void DrawXYPolygon (G4double size,
		      const G4Point3D& centre,
		      G4int nSides);
  // Draws in world coordinates a polygon in the screen plane knowing
  // viewpoint direction and up vector.

  GLdouble clear_colour[4];
  static const GLubyte fStippleMaskHashed [128];
};

#include "G4OpenGLSceneHandler.icc"

#endif

#endif