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CaveScene.h

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/***************************************************************************
 *cr                                                                       
 *cr            (C) Copyright 1995-2008 The Board of Trustees of the           
 *cr                        University of Illinois                       
 *cr                         All Rights Reserved                        
 *cr                                                                   
 ***************************************************************************/

/***************************************************************************
 * RCS INFORMATION:
 *
 *      $RCSfile: CaveScene.h,v $
 *      $Author: johns $        $Locker:  $             $State: Exp $
 *      $Revision: 1.45 $       $Date: 2008/03/27 19:36:35 $
 *
 ***************************************************************************
 * DESCRIPTION:
 *   The CAVE specific Scene.  It has to get information from the
 * shared memory arena, since the display lists are shared amoung
 * the different machines
 *
 ***************************************************************************/
#ifndef CAVE_SCENE_H
#define CAVE_SCENE_H

#include "Scene.h"
#include <cave.h>
#include "CaveRoutines.h"
#include "CaveDisplayDevice.h" // for manipulating lights etc
#include "VMDThreads.h"        // for the barrier synchronization code

class VMDApp;

// This needs to grab shared memory for use in the CAVE
// environment.  It does it with one means.
//  1) use a CaveScene::operator new so that the internal
//      scene information is shared (get_disp_storage and
//      free_disp_storage)
// The shared memory is allocated through a global function,
//  new_from_CAVE_memory.
// This must also call the left eye and right eye draws correctly

class CaveScene : public Scene {
private:
  VMDApp *app;

  vmd_barrier_t * draw_barrier; 

  CAVELOCK draw_rwlock;  

public:
  CaveScene(VMDApp *);
  virtual ~CaveScene(void);
  
  void draw(DisplayDevice *);
  
  virtual int prepare();

  void *operator new(size_t);
  void operator delete(void *, size_t);
};

#endif /* CAVE_SCENE_H */

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