SoCounter.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_COUNTER_
#define  _SO_COUNTER_
 
#include <Inventor/engines/SoSubEngine.h>
#include <Inventor/fields/SoSFShort.h>
#include <Inventor/fields/SoSFBool.h>
#include <Inventor/fields/SoSFTrigger.h>
 
class  SoCounter : public SoEngine {
 
  SO_ENGINE_HEADER(SoCounter);
 
 public:
  SoSFShort           min;
  SoSFShort           max;
  SoSFShort           step;
  SoSFTrigger         trigger;
  SoSFShort           reset;
 
  SoEngineOutput      output;
  SoEngineOutput      syncOut;
 
  SoCounter();
 
 private:
 
  static void initClass();
  static void exitClass();
 
 private:
  virtual void        inputChanged(SoField *whichInput);
 
  // Evaluation method
  virtual void        evaluate();
 
  // Destructor
  ~SoCounter();
 private:
  enum Todo {
    RECALC  = (1<<0),
    RESET   = (1<<1),
    STEP    = (1<<2)
  };
  unsigned int        todo;
  int                 nStages;
  int                 curStage;
  struct Stage {
    int     val;            // counter value for stage
  }                   *stages;
};
 
#endif  /* _SO_COUNTER_ */