timedCycle.h

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/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file timedCycle.h
 * @author jason
 * @date 2000-08-01
 */
 
#ifndef TIMED_CYCLE_H
#define TIMED_CYCLE_H
// Includes
#include "pandabase.h"
 
#include "clockObject.h"
 
class Datagram;
class DatagramIterator;
 
/**
 * A class for anything that needs to cycle over some finite list of elements
 * in increments based on time.  All time variables are assumed to be set in
 * seconds.
 */
 
class EXPCL_PANDA_PUTIL TimedCycle
{
public:
  INLINE TimedCycle();
  INLINE TimedCycle(PN_stdfloat cycle_time, int element_count);
 
  INLINE void set_element_count(int element_count);
  INLINE void set_cycle_time(PN_stdfloat cycle_time);
  INLINE int next_element();
 
public:
  void write_datagram(Datagram &me);
  void fillin(DatagramIterator &scan);
 
private:
  ClockObject* _global_clock;
  PN_stdfloat _cycle_time;
  PN_stdfloat _inv_cycle_time;
  double _next_switch;
  int _current_child;
  int _element_count;
};
 
#include "timedCycle.I"
 
#endif