pingpongvalue.h

template<typename T> class PingPongValue
	{
		private:
			T value, min, max, speed, dir{1};

		public:
			inline PingPongValue(T mMin, T mMax, T mSpeed) : value(mMin), min(mMin), max(mMax), speed(mSpeed) { }
			inline void update(float mFT)
			{
				value += speed * mFT * dir;
				if(value > max) { value = max; dir = -1; }
				else if(value < min) { value = min; dir = 1; }
			}
			inline operator T() const noexcept { return value; }
	};