SoOneShot.h

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/*=======================================================================
 * Copyright 1991-1996, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED
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 * in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or
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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.),            ***
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 ***                        BORDEAUX, FRANCE                                        ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_ONE_SHOT_
#define  _SO_ONE_SHOT_
 
#include <Inventor/engines/SoSubEngine.h>
#include <Inventor/fields/SoSFBool.h>
#include <Inventor/fields/SoSFTrigger.h>
#include <Inventor/fields/SoSFTime.h>
#include <Inventor/fields/SoSFBitMask.h>
 
class  SoOneShot : public SoEngine {
 
  SO_ENGINE_HEADER(SoOneShot);
 
 public:
  
  enum Flags {
    RETRIGGERABLE   = (1<<0),       
    HOLD_FINAL      = (1<<1)
  };
 
  SoSFTime            duration;
  SoSFTrigger         trigger;
  SoSFBitMask         flags;
  SoSFBool            disable;
  SoSFTime            timeIn;
 
  SoEngineOutput      timeOut;
  SoEngineOutput      isActive;
  SoEngineOutput      ramp;
 
  SoOneShot();
 
 private:
 
  static void initClass();
  static void exitClass();
  
  // Writes instance to SoOutput. Takes care of not writing out
  // connection to realTime that is created in constructor.
  virtual void        writeInstance(SoOutput *out);
 
 private:
  virtual void        inputChanged(SoField *whichInput);
 
  // Evaluation method
  virtual void        evaluate();
 
  // Reads stuff into instance.  Works around a problem with old
  // files that contain explicit references to the default
  // connection to realTime.
  virtual SbBool      readInstance(SoInput *in, unsigned short flags);
 
  // Destructor
  ~SoOneShot();
 private:
  enum State {
    DISABLED,               // everything clamped at 0 (via disable input)
    OFF,                    // normal idle state
    TRIGGERED,              // has been triggered, need to start running
    ON,                     // running, watching the time
    PEAKED                  // have reached the end, need to reset
  }                   state;
  SbTime              baseTime;       // Starting time for elapsed time 
  SbTime              timeVal;        // holds output time value
  double              rampVal;        // holds ramp value
  SbBool              outputPending;  // keeps outputs enabled until data is read
 
 
 
  //
  // #unfound enum Flags
  //
 
};
 
#endif  /* _SO_ONE_SHOT_ */