unity之 PlayableGraph 动画应用（三）完结篇
总述：
以往的Animator, 角色需要的动画会一次性全部拖拽到列表里，加载就需要一次性的全部加载进去，造成卡顿。而AnimationClipPlayable可以按需加载 需要再加载 超时卸载，可以减少内存的占用。
角色动画特别多，常用的动画 默认加载，非常用的动画可以动态加载，设置过期时间 超时卸载。
话不多说，直接上代码：
1 using System.Collections.Generic;
2 using UnityEngine;
3 using UnityEngine.Animations;
4 using UnityEngine.Playables;
5
6 public class TestPlayable : MonoBehaviour
7 {
8 private Animator m_Animator;
9 //画布
10 private PlayableGraph m_PlayableGraph;
11 //输出
12 private AnimationPlayableOutput m_AnimationPlayableOutput;
13 //动画融合
14 private AnimationMixerPlayable m_AnimationMixerPlayable;
15 //动画剪辑Playable列表
16 private List<AnimationClipPlayable> m_ClipPlayableList = new List<AnimationClipPlayable>(100);
17 [SerializeField]
18 private AnimationClip[] m_Clips;
19
20 private void Awake()
21 {
22 m_Animator = GetComponent<Animator>();
23 //创建画布
24 m_PlayableGraph = PlayableGraph.Create("testGraph");
25 //创建输出
26 m_AnimationPlayableOutput = AnimationPlayableOutput.Create(m_PlayableGraph, "OutPut", m_Animator);
27 }
28
29 private void Start()
30 {
31 CreateMixerPlayable();
32 }
33
34 private void CreateMixerPlayable()
35 {
36 //动画融合 有多少个动画剪辑就需要多少个动画融合
37 m_AnimationMixerPlayable = AnimationMixerPlayable.Create(m_PlayableGraph, 100);
38 //设置输出源
39 m_AnimationPlayableOutput.SetSourcePlayable(m_AnimationMixerPlayable, 0);
40 }
41
42 private void Update()
43 {
44 if (Input.GetKeyUp(KeyCode.A))
45 {
46 if (m_ClipPlayableList.Count >= m_Clips.Length) return;
47 AnimationClip clip = m_Clips[m_ClipPlayableList.Count];
48 //根据clip 创建Playable动画剪辑
49 AnimationClipPlayable clipPlayable = AnimationClipPlayable.Create(m_PlayableGraph, clip);
50 //画布连接 playable混合器 而混合器与Playable动画剪辑相连接
51 m_PlayableGraph.Connect(clipPlayable, 0, m_AnimationMixerPlayable, m_ClipPlayableList.Count);
52 //把所有的playable动画剪辑 权重设置0
53 m_AnimationMixerPlayable.SetInputWeight(m_ClipPlayableList.Count, 0);
54 m_ClipPlayableList.Add(clipPlayable);
55 }
56 else if (Input.GetKeyUp(KeyCode.D))
57 {
58 if (m_ClipPlayableList.Count > 0)
59 {
60 AnimationClipPlayable clipPlayable = m_ClipPlayableList[m_ClipPlayableList.Count - 1];
61 m_ClipPlayableList.Remove(clipPlayable);
62 clipPlayable.Destroy();
63 }
64 }
65 else if (Input.GetKeyUp(KeyCode.P))
66 {
67 Play();
68 }
69 }
70
71 private int index = 0;
72 private void Play()
73 {
74 int count = m_ClipPlayableList.Count;
75 if (count <= 0) return;
76 if (index >= count) index = 0;
77 m_PlayableGraph.Play();
78 //通过索引获取playable
79 if (index >= m_AnimationMixerPlayable.GetInputCount()) return;
80 Playable playable = m_AnimationMixerPlayable.GetInput(index);
81 if (playable.IsNull()) return;
82 playable.SetTime(0);
83 playable.Play();
84 for (int i = 0; i < count; i++)
85 {
86 if (i == index)
87 {
88 //需要播放的权重设置为1
89 m_AnimationMixerPlayable.SetInputWeight(i, 1);
90 }
91 else
92 {
93 //不播放的权重设置为0
94 m_AnimationMixerPlayable.SetInputWeight(i, 0);
95 }
96 }
97 index++;
98 }
99 }
按 A键 添加动画剪辑，按 D键 销毁动画剪辑、按P键播放 ！效果如下：
好了，以上就是PlayableGraph 动画应用，对以往的动画控制器 AnimatorController 连线 + tag标识 要简单易用的多，还带来内存性能上的优化~
