Scripting with Mechanim

I noticed that the Animator API relies heavily on HashIDs per:
http://unity3d.com/learn/tutorials/projects/stealth/hashids

I'm not about to hardcode all the strings though. I'm dealing with Mixamo and all the animate states get the .anim filename. That would be a lot of manual hardcoding.

Code (csharp):

1. int dyingState = Animator.StringToHash("Base Layer.Dying");
2.  

I wanted a way to just get the string from the AnimatorStateInfo.

I just call the following from my custom inspectors and panels so that I can display the friendly names.

First I build the layers and hashes in my custom inspector OnEnable.

Code (csharp):

1.     private void OnEnable()
2.     {
3.         AnimatorEx.BuildLayers();
4.         AnimatorEx.BuildStateHash();
5.     }

And then I can display the friendly name in OnInspectorGUI.

Code (csharp):

1. EditorGUILayout.TextField("State Name", AnimatorEx.HashToString(info.nameHash));

Here's the class to auto build the string lists by searching for .anim files and looking for Animator objects in your scene.

Code (csharp):

1. using System.Collections.Generic;
2. using System.IO;
3. using UnityEditor;
4. using UnityEngine;
5.  
6. public static class AnimatorEx
7. {
8.     private static List<string> m_layers = new List<string>();
9.  
10.     public static void BuildLayers()
11.     {
12.         foreach (Animator animator in GameObject.FindObjectsOfType(typeof (Animator)))
13.         {
14.             if (animator)
15.             {
16.                 for (int index = 0; index < animator.layerCount; ++index)
17.                 {
18.                     string layer = animator.GetLayerName(index);
19.                     if (!m_layers.Contains(layer))
20.                     {
21.                         m_layers.Add(layer);
22.                         //Debug.Log(layer);
23.                     }
24.                 }
25.             }
26.         }
27.     }
28.  
29.     private static Dictionary<int, string> m_stateHash = new Dictionary<int, string>();
30.  
31.     public static string HashToString(int hash)
32.     {
33.         if (m_stateHash.ContainsKey(hash))
34.         {
35.             return m_stateHash[hash];
36.         }
37.         else
38.         {
39.             return hash.ToString();
40.         }
41.     }
42.  
43.     public static void BuildStateHash()
44.     {
45.         m_stateHash.Clear();
46.         foreach (string path in AssetDatabase.GetAllAssetPaths())
47.         {
48.             if (path.ToLower().EndsWith(".anim"))
49.             {
50.                 foreach (string layer in m_layers)
51.                 {
52.                     string name = layer + "." + Path.GetFileNameWithoutExtension(path);
53.                     int hash = Animator.StringToHash(name);
54.                     //Debug.Log(string.Format("hash: {0} name={1}", hash, name));
55.                     m_stateHash[hash] = name;
56.                 }
57.             }
58.         }
59.     }
60. }

 

For my next trick, I'm trying to script access to the motion property of the state. I need to be able to assign a different animation so that I can trim the existing animation.

Is there a way?

I'll have to dig with reflection and inspection...

Thanks