Class Animation

utilities/olcUTIL_Animate2D.h:192–237

	// Animation object holds a group of frame sequences and can mutate an AnimationState token
	template<typename StatesEnum>
	class Animation
	{
	public:
		Animation() = default;
		
		// Change an animation state token to a new state
		inline bool ChangeState(AnimationState& state, const StatesEnum& sStateName) const
		{
			size_t idx = m_mapStateIndices.at(sStateName);
			if (state.nIndex != idx)
			{
				state.fTime = 0.0f;
				state.nIndex = idx;
				state.bComplete = false;
				return true;
			}

			return false;
		}

		// Update an animation state token
		inline void UpdateState(AnimationState& state, const float fElapsedTime) const
		{
			state.fTime += fElapsedTime;
			state.bComplete = m_vSequences[state.nIndex].Complete(state.fTime);
		}

	public:
		// Retrieve the frame information for a given animation state
		inline const Frame& GetFrame(const AnimationState& state) const
		{
			return m_vSequences[state.nIndex].GetFrame(state.fTime);
		}

	public:
		// Add a named Frame sequence as a state
		inline void AddState(const StatesEnum& sStateName, const FrameSequence& sequence)
		{
			m_vSequences.emplace_back(sequence);
			m_mapStateIndices[sStateName] = m_vSequences.size() - 1;
		}

	private:
		std::vector<FrameSequence> m_vSequences;
		std::unordered_map<StatesEnum, size_t> m_mapStateIndices;
	};
}