AnimatorControllerを使わずに簡単にアニメーションを再生出来るSimpleAnimation【Unity】

SimpleAnimationChanger.cs

//  SimpleAnimationChanger.cs
//  http://kan-kikuchi.hatenablog.com/entry/SimpleAnimation
//
//  Created by kan.kikuchi on 2018.07.19.

using UnityEngine;
using System.Collections.Generic;

#if UNITY_EDITOR
using UnityEditor;
#endif

/// <summary>
/// SimpleAnimationのアニメーションを切り替えるクラス
/// </summary>
public class SimpleAnimationChanger : MonoBehaviour {

  //切り替える対象のアニメーション
  [SerializeField]
  private SimpleAnimation _simpleAnimation = null;

  [SerializeField]
  private AnimationClip _animationClip       = null;
  private AnimationClip _beforeAnimationClip = null;

  //アニメーションの状態の名前のリスト
  private Dictionary<string, string> _stateNameDict = new Dictionary<string, string>();
  public  Dictionary<string, string>  StateNameDict{ get { return _stateNameDict; }}

  //初期化したか
  private bool _isInitialized = false;

  //=================================================================================
  //初期化
  //=================================================================================

  private void Start() {
    if(_simpleAnimation != null){
      Init();
    }
  }

  /// <summary>
  /// SimpleAnimationを設定する
  /// </summary>
  public void SetSimpleAnimation(SimpleAnimation simpleAnimation){
    _simpleAnimation = simpleAnimation;
    Init();
  }

  //初期化
  private void Init(){
    if(_isInitialized){
      return;
    }
    _isInitialized = true;

    _beforeAnimationClip = _animationClip;
    foreach (var state in _simpleAnimation.GetStates()) {
      _stateNameDict[state.clip.name] = state.name;
    }
  }

  private void OnValidate() {
    if(!Application.isPlaying){
      return;
    }

    if(_isInitialized && _beforeAnimationClip != _animationClip){
      AddStateIfneeded();
      _beforeAnimationClip = _animationClip;
    }
  }

  //=================================================================================
  //変更
  //=================================================================================

  /// <summary>
  /// アニメーションを切り替える
  /// </summary>
  public void Change (string stateName) {
    if(_simpleAnimation == null){
      Debug.LogError("_simpleAnimationがありません!");
      return;
    }
    if (_simpleAnimation.GetState(stateName) == null) {
      Debug.LogError(stateName + "というアニメーションがありません!");
      return;
    }
    _simpleAnimation.CrossFade(stateName, 0.5f);
	}

  //=================================================================================
  //追加
  //=================================================================================

  //アニメーションを追加する必要があれば追加
  private void AddStateIfneeded(){
    string stateName = _animationClip.name;

    if (_simpleAnimation.GetState(stateName) == null) {
      _simpleAnimation.AddState(_animationClip, stateName);
      _stateNameDict[_animationClip.name] = stateName;
    }

    Change(stateName);
  }

}

#if UNITY_EDITOR
/// <summary>
/// SimpleAnimationのインスペクターの表示を変えるクラス
/// </summary>
[CustomEditor(typeof(SimpleAnimationChanger))]
public class SimpleAnimationChangerEditor : Editor {

  //=================================================================================
  //更新
  //=================================================================================

  public override void OnInspectorGUI() {
    base.OnInspectorGUI();

    //実行中だけ表示
    if (!Application.isPlaying) {
      return;
    }

    SimpleAnimationChanger simpleAnimationChanger = target as SimpleAnimationChanger;

    //変更ボタン
    EditorGUILayout.Space();
    EditorGUILayout.LabelField("---------アニメ切り替えボタン---------");

    int count = 0;
    foreach (var statePair in simpleAnimationChanger.StateNameDict) {
      if (count % 5 == 0) {
        if (count != 0) {
          EditorGUILayout.EndHorizontal();
        }
        EditorGUILayout.BeginHorizontal(GUI.skin.box);
      }

      if (GUILayout.Button(statePair.Key)) {
        simpleAnimationChanger.Change(statePair.Value);
      }

      count++;
    }
    EditorGUILayout.EndHorizontal();

  }

}
#endif