snd_MoveValue.h

#ifndef NW4R_SND_MOVE_VALUE_H
#define NW4R_SND_MOVE_VALUE_H
 
/*******************************************************************************
 * classes and functions
 */
 
namespace nw4r { namespace snd { namespace detail
{
    // [R89JEL]:/bin/RVL/Debug/mainD.elf:.debug::0x27b93, 0x28fef...
    template <typename TValue, typename TTime>
    class MoveValue
    {
    // methods
    public:
        // cdtors
        MoveValue() :
            mOrigin     (TValue()),
            mTarget     (TValue()),
            mFrame      (TTime ()),
            mCounter    (TTime ())
        {
        }
 
        // methods
        TValue GetValue() const
        {
            if (IsFinished())
                return mTarget;
 
            return mOrigin + mCounter * (mTarget - mOrigin) / mFrame;
        }
 
        void SetTarget(TValue targetValue, TTime frames)
        {
            mOrigin     = GetValue();
            mTarget     = targetValue;
            mFrame      = frames;
            mCounter    = TTime();
        }
 
        bool IsFinished() const { return mCounter >= mFrame; }
 
        TTime GetRemainingTime() const {
            return IsFinished() ? 0 : mFrame - mCounter;
        }
 
        void InitValue(TValue value)
        {
            mOrigin     = value;
            mTarget     = value;
            mFrame      = TTime();
            mCounter    = TTime();
        }
 
        void Update()
        {
            if (mCounter < mFrame)
                mCounter++;
        }
 
    // members
    private:
        TValue  mOrigin;    // size TValue, offset 0x00
        TValue  mTarget;    // size TValue, offset TValue
        TTime   mFrame;     // size TTime,  offset TValue * 2
        TTime   mCounter;   // size TTine,  offset TValue * 2 + TTime
    }; // size TValue * 2 + TTime * 2
}}} // namespace nw4r::snd::detail
 
#endif // NW4R_SND_MOVE_VALUE_H