CrowdControl/Assets/Feel/MMTools/Tools/MMAnimation/MMStopMotionAnimation.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace MoreMountains.Tools
{
	[AddComponentMenu("More Mountains/Tools/Animation/MMStopMotionAnimation")]
	public class MMStopMotionAnimation : MonoBehaviour
	{
		public enum FramerateModes { Manual, Automatic }

		[Header("General Settings")]
		public bool StopMotionEnabled = true;
		public int AnimationLayerID = 0;

		[Header("Framerate")]
		public FramerateModes FramerateMode = FramerateModes.Automatic;

		[MMEnumCondition("FramerateMode", (int)FramerateModes.Automatic)]
		public float FramesPerSecond = 4f;
		[MMEnumCondition("FramerateMode", (int)FramerateModes.Automatic)]
		public float PollFrequency = 1f;

		[MMEnumCondition("FramerateMode", (int)FramerateModes.Manual)]
		public float ManualTimeBetweenFrames = 0.125f;
		[MMEnumCondition("FramerateMode", (int)FramerateModes.Manual)]
		public float ManualAnimatorSpeed = 2;

		public float timet = 0;

		protected float _currentClipFPS = 0;
		protected float _currentClipLength = 0f;
		protected float _lastPollAt = -10f;
		protected Animator _animator;
		protected AnimationClip _currentClip;

		protected virtual void Awake()
		{
			_animator = this.gameObject.GetComponent<Animator>();            
		}

		protected virtual void Update()
		{
			StopMotion();

			if (Time.time - _lastPollAt > PollFrequency)
			{
				Poll();
			}
		}

		protected virtual void StopMotion()
		{
			if (!StopMotionEnabled)
			{
				return;
			}

			float timeBetweenFrames = 0f;
			float animatorSpeed = 0f;

			switch(FramerateMode)
			{
				case FramerateModes.Manual:
					timeBetweenFrames = ManualTimeBetweenFrames;
					animatorSpeed = ManualAnimatorSpeed;
					break;
				case FramerateModes.Automatic:
					timeBetweenFrames = (1 / FramesPerSecond);
					animatorSpeed = (1 / (FramesPerSecond - 1)) * 2f * _currentClipFPS;
					break;
			}

			timet += Time.deltaTime;
			if (timet > timeBetweenFrames)
			{
				timet -= timeBetweenFrames;
				_animator.speed = animatorSpeed;
			}
			else
			{
				_animator.speed = 0;
			}
		}

		protected virtual void Poll()
		{
			_currentClip = _animator.GetCurrentAnimatorClipInfo(AnimationLayerID)[0].clip;
			_currentClipLength = _currentClip.length;
			_currentClipFPS = _currentClip.frameRate;
			_lastPollAt = Time.time;
		}
	}
}