AnimationMixerPlayable

SamplePlayableAPI.cs

using UnityEngine;
using System.Collections;
using UnityEngine.Experimental.Director;

public class SamplePlayableAPI : MonoBehaviour {

    // 対象のAniamtor
    [SerializeField] Animator animator;
    // 再生するAnimationClip
    [SerializeField] AnimationClip run, walk;

    private AnimationMixerPlayable mixer;

    void Start ()
    {
        mixer = AnimationMixerPlayable.Create();
        mixer.SetInputs(new [] { run, walk });
        animator.Play(mixer);

        Weight = 0;
    }

    public float Weight
    {
        set {
            mixer.SetInputWeight(0, value);
            mixer.SetInputWeight(1, 1 - value);
        }
    }
}