base/Universe

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/****************************************************************************
  Copyright (C)1996 David Jung <opensim@pobox.com>

  This program/file is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
        
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details. (http://www.gnu.org)
        
  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  $Id: Universe 1029 2004-02-11 20:45:54Z jungd $
  $Revision: 1.4 $
  $Date: 2004-02-11 15:45:54 -0500 (Wed, 11 Feb 2004) $
  $Author: jungd $
 
****************************************************************************/

#ifndef _BASE_UNIVERSE_
#define _BASE_UNIVERSE_

#include <base/base>
#include <base/reflist>
#include <base/Object>
#include <base/Simulatable>
#include <base/VFileSystem>
#include <base/Cache>
#include <base/PathName>
#include <base/World>

#include <list>


namespace base {


class Universe : public Simulatable
{
public:
  Universe(ref<VFileSystem> fs, const String& resourceDirectoryName, const String& cacheDirectoryName="cache");
  virtual ~Universe();
  
  virtual String className() const { return String("Universe"); }
  virtual Object& clone() const { return *(Object*)this; } // singelton, just return THE instance 


  // Simulatable
  virtual void preSimulate();
  virtual void simulateForSimTime(const Time& dt);
  virtual void simulateForRealTime(const Time& dt, Real simTimeStepSize = minSimStepSize);

  void setResourceDirectory(const PathName& resourceDirectory);
  void setCacheDirectory(const PathName& cacheDirectory);
  ref<Cache> cache() { return masterCache; }
  ref<VFileSystem> filesystem() { return vfilesystem; }

  void addWorld(ref<World> world);
  ref<World> removeWorld(ref<World> world);

  void renderWorlds(); ///< render a single frame of  all Worlds ( renderFrame() )

  long renderedFrameCount() const { return frameCount; }
  static const int maxDisplayFrameRate = 30; // Hz

  void enableSimulationRendering(bool renderWorlds) { renderWorldsDuringSim=renderWorlds; }
  
  void addSimulatable(ref<Simulatable> simulatable);
  ref<Simulatable> removeSimulatable(ref<Simulatable> simulatable);
  
  Time simTime;
  
protected:

private:
  Universe(Universe& u) 
    : vfilesystem(u.vfilesystem), 
    renderWorldsDuringSim(true)
  {
    masterCache = ref<Cache>( NewNamedObj("masterCache") Cache(u.vfilesystem, u.masterCache->resourceDirectory(), u.masterCache->cacheDirectory() ) );
  }


  ref<VFileSystem> vfilesystem;
  ref<Cache>       masterCache;

  bool renderWorldsDuringSim;  // render Worlds during simulation?

  reflist<World> worlds;
  reflist<Simulatable> simulatables;

  Time startRealTime;
  long frameCount;

};


} // base

#endif

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