SoBlinker.h

/*=======================================================================
 * Copyright 1991-1996, Silicon Graphics, Inc.
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**=======================================================================*/
/*=======================================================================
** Author      : Ronen Barzel (MMM yyyy)
**=======================================================================*/
/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
 ***              AND IS DISTRIBUTED UNDER A LICENSE AGREEMENT.                     ***
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 ***                        BORDEAUX, FRANCE                                        ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_BLINKER_
#define  _SO_BLINKER_
 
#include <Inventor/nodes/SoSwitch.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/fields/SoSFBool.h>
#include <Inventor/sensors/SoOneShotSensor.h>
#include <Inventor/engines/SoTimeCounter.h>
#include <Inventor/sensors/SoFieldSensor.h>
 
 
//
//  Class: SoBlinker
//
//  SoSwitch node cycles between all its children.
//  with only one child, cycles that child on and off.
//
 
class  SoBlinker : public SoSwitch {
 
  SO_NODE_HEADER(SoBlinker);
 
 public:
  // Fields
  SoSFFloat           speed;
  SoSFBool            on;
 
  SoBlinker();
 
 private:
  // Bounding box computation takes all children into account
  virtual void        getBoundingBox(SoGetBoundingBoxAction *action);
 
  // overload write method not to write internal engines
  virtual void        write(SoWriteAction *action);
 
 private:
  static void         initClass();
  static void         exitClass();
  
  virtual void        notify(SoNotList *);
 
 private:
  virtual ~SoBlinker();
 
 private:
  SbBool              wasOn;  // Remembers previous state of "on" field
 
  // keep track of internal connection
  class SoEngineOutput        *internalConnection;
 
  class SoTimeCounter *count;
  void                setupCounter();
  int                 nchildren;
 
  class SoOneShotSensor       *childrenSensor;
  class SoOneShotSensor       *whichChildSensor;
  class SoFieldSensor         *onSensor;
 
  static void childrenSensorCB(void *data, class SoSensor *sensor);
  static void whichChildSensorCB(void *data, class SoSensor *sensor);
  static void onSensorCB(void *data, class SoSensor *sensor);
};
 
#endif /* _SO_BLINKER_ */