Unity导入FBX自动进行动画切分

手动处理动画分割

在导入FBX模型过程中，若带有动画呢，需要对它进行切分。

当然这个工作可以在Unity中完成。

比如：

这样手动来分割进行。

自动动画切分

这就需要代码了。

把代码保存成cs文件，然后放在Editor文件夹中。若没有此文件夹，就自己创建一个！

代码如下：

 // FbxAnimListPostprocessor.cs : Use an external text file to import a list of
 // splitted animations for FBX 3D models.
 //
 // Put this script in your "Assets/Editor" directory. When Importing or
 // Reimporting a FBX file, the script will search a text file with the
 // same name and the ".txt" extension.
 // File format: one line per animation clip "firstFrame-lastFrame loopFlag animationName"
 // The keyworks "loop" or "noloop" are optional.
 // Example:
 // 0-50 loop Move forward
 // 100-190 die

 using UnityEngine;
 using UnityEditor;
 using System.Collections;
 using System.IO;
 using System.Text.RegularExpressions;
 using System;
 using System.IO;


 public class FbxAnimListPostprocessor : AssetPostprocessor
 {
     public void OnPreprocessModel()
     {
         if (Path.GetExtension(assetPath).ToLower() == ".fbx"
             && !assetPath.Contains("@"))
         {
             try
             {
                 string fileAnim;
                 if (DragAndDrop.paths.Length <= 0)
                 {
                     return;
                 }
                 fileAnim = DragAndDrop.paths[0];
                 string ClipText = Path.ChangeExtension(fileAnim, ".txt");
                 StreamReader file = new StreamReader(ClipText);
                 string sAnimList = file.ReadToEnd();
                 file.Close();
                 //
                 if (EditorUtility.DisplayDialog("FBX Animation Import from file",
                     fileAnim, "Import", "Cancel"))
                 {
                     System.Collections.ArrayList List = new ArrayList();
                     ParseAnimFile(sAnimList, ref List);

                     ModelImporter modelImporter = assetImporter as ModelImporter;
                     //modelImporter.clipAnimations. = true;
                     modelImporter.clipAnimations = (ModelImporterClipAnimation[])
                         List.ToArray(typeof(ModelImporterClipAnimation));

                     EditorUtility.DisplayDialog("Imported animations",
                         "Number of imported clips: "
                         + modelImporter.clipAnimations.GetLength(0).ToString(), "OK");
                 }
             }
             catch { }
             // (Exception e) { EditorUtility.DisplayDialog("Imported animations", e.Message, "OK"); }
         }
     }

     void ParseAnimFile(string sAnimList, ref System.Collections.ArrayList List)
     {
         Regex regexString = new Regex(" *(?[0-9]+) *- *(?[0-9]+) *(?(loop|noloop| )) *(?[^\r^\n]*[^\r^\n^ ])",
             RegexOptions.Compiled | RegexOptions.ExplicitCapture);

         Match match = regexString.Match(sAnimList, 0);
         while (match.Success)
         {
             ModelImporterClipAnimation clip = new ModelImporterClipAnimation();

             if (match.Groups["firstFrame"].Success)
             {
                 clip.firstFrame = System.Convert.ToInt32(match.Groups["firstFrame"].Value, 10);
             }
             if (match.Groups["lastFrame"].Success)
             {
                 clip.lastFrame = System.Convert.ToInt32(match.Groups["lastFrame"].Value, 10);
             }
             if (match.Groups["loop"].Success)
             {
                 clip.loop = match.Groups["loop"].Value == "loop";
             }
             if (match.Groups["name"].Success)
             {
                 clip.name = match.Groups["name"].Value;
             }

             List.Add(clip);

             match = regexString.Match(sAnimList, match.Index + match.Length);
         }
     }
 }

怎么使用呢?

在你的FBX同目录文件夹下，创建一个txt文件，名字与FBX文件同名即可。

txt内容，为 每个动画的起始帧和结束帧，是否循环播放，和帧名。

CowGirl_Ani.txt

 0-50 loop Move forward
 100-190 die

把FBX文件拖入到Unity的资源中，可以看到弹出对话框。选择Import导入，就会自动弹出分割动画的数量。

若点击cancle ，就会直接导入动画，而不会分割动画。