C:/Work/specialnumbers_svn/NumberLib/NumbersLib/BufferedNumber.h

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#ifndef _BUFFERED_NUMBER_H_
#define _BUFFERED_NUMBER_H_

#include "utils.h"
#include "ClampedNumber.h"
#include "UpdateableNumber.h"

namespace luma
{
namespace numbers
{

template <class T, class Number = ClampedNumber<T>>
class BufferedNumber : public UpdateableNumber<T>
{
private:
   Number mIdealValue;
   Number mValue;

public:
   BufferedNumber(T initialValue, T min, T max, T increment);

   T getValue() const;

   void setValue(T value, float elapsedTime = TIME_UNIT);

   void forceValue(T value);
};

template <class T, class Number>
BufferedNumber<T, Number>::BufferedNumber(T initialValue, T min, T max, T increment):
   mIdealValue(initialValue, min, max, increment),
   mValue(initialValue, min, max, increment)
{
}

template <class T, class Number>
T BufferedNumber<T, Number>::getValue() const
{
   return mValue;
}

template <class T, class Number>
void BufferedNumber<T, Number>::setValue(T value, float elapsedTime)
{
   mIdealValue.setValue(value);

   if (mValue + mValue.increment() * elapsedTime * frameRate < mIdealValue)
      mValue.inc(elapsedTime);   
   else if(mValue - mValue.increment() * elapsedTime * frameRate > mIdealValue)
      mValue.dec(elapsedTime);
   else
      mValue.setValue(value);
}

template <class T, class Number>
void BufferedNumber<T, Number>::forceValue(T value)
{
   mIdealValue.setValue(value);
   mValue.setValue(value);
}

};}; //namespace

#endif //_BUFFERED_NUMBER_H_

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