FBXからAnimationClipを取り出す

AnimationCopy.cs

using UnityEngine;
using UnityEditor;
using System.IO;

public class Copy
{
	[MenuItem("Assets/Copy")]
	static void AssetCopy ()
	{
		// AnimationClipを持つFBXのパス
		string fbxPath = "Assets/UnityChan/SD_unitychan/Animations/SD_unitychan_motion_Generic.fbx";
		// AnimationClipのファイル名
		string clipName = "GoDown";
		// AnimationClipの出力先
		string exportPath = "Assets/Clone.anim";

		string tempExportedClip = "Assets/tempClip.anim";

		// AnimationClipの取得
		var animations = AssetDatabase.LoadAllAssetsAtPath (fbxPath);
		var originalClip = System.Array.Find<Object> (animations, item =>
	   		item is AnimationClip && item.name == clipName
		);
	
		// AnimationClipをコピーして出力(ユニークなuuid)
		var copyClip = Object.Instantiate (originalClip);
		AssetDatabase.CreateAsset (copyClip, tempExportedClip);

		// AnimationClipのコピー（固定化したuuid）
		File.Copy (tempExportedClip, exportPath, true);
		File.Delete (tempExportedClip);

		// AssetDatabaseリフレッシュ
		AssetDatabase.Refresh ();
	}
}