wait until the animation finishes the <see cref="m_normalizedTime "/> part

WaitAnimation.cs

using UnityEngine;
// ReSharper disable InconsistentNaming

///<summary>
/// wait until the animation finishes the <see cref="m_normalizedTime "/> part.
/// </summary>
/// <remarks>
/// original code is http://tsubakit1.hateblo.jp/entry/2016/02/11/021743. The credit goes to him.
/// </remarks>
/// <example> 
/// how to use <see cref="WaitForSecondsRealtime"/> 
/// 
/// #1. animator.play 
/// <code>
/// animator.Play(myState);
/// yield return null;　// waiting 1frame required so that animator can know state change.
/// yield return new WaitAnimation(animator: animator, layerNo: 0, normalizedTime: 1f); // this is waiting the finish of (animation of (myState))
/// </code>
/// 
/// #2. animator.crossFadeInFixedTime
/// <code>
/// animator.CrossFadeInFixedTime(myState, transitionSecs);
/// yield return new WaitForSecondsRealtime(transitionSecs); // waiting transitionSecs required so that I wait that current state becomes myState.
/// yield return new WaitAnimation(animator: animator, layerNo: 0, normalizedTime: 1f); // this is waiting the finish of (animation of (myState))
/// </code>
/// 
/// </example>
public class WaitAnimation : CustomYieldInstruction
{
    private Animator m_animator;
    private int m_lastStateHash;
    private int m_layerNo;
    private float m_normalizedTime;

    public WaitAnimation(Animator animator, int layerNo, float normalizedTime = 1)
    {
        m_layerNo = layerNo;
        m_animator = animator;
        m_lastStateHash = animator.GetCurrentAnimatorStateInfo(layerNo).fullPathHash;
        m_normalizedTime = normalizedTime;
    }

    public override bool keepWaiting
    {
        get
        {
            var currentAnimatorState = m_animator.GetCurrentAnimatorStateInfo(m_layerNo);
            return currentAnimatorState.fullPathHash == m_lastStateHash &&
                   currentAnimatorState.normalizedTime < m_normalizedTime;
        }
    }
}