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能做到去掉Scale曲线，降低浮点精度

using System;
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEditor;

public static class RemoveAnimationClipScale 
{

	[MenuItem("Tools/Animation/Remove Animation Clip Scale")]
	public static void RemoveAnimationClipScaleMenu()
	{

		int i = 0;
		int total = 0;

		try
		{
			EditorUtility.DisplayProgressBar("Remove Animation Clip Scale", "Collecting Animation Clip", 0);
			var gos = EnumAssets.EnumInCurrentSelection<UnityEngine.AnimationClip>();
			total = gos.Count();
			if (total > 0)
			{
				foreach (var go in gos)
				{
					EditorUtility.DisplayProgressBar("Remove Animation Clip Scale", go.name, i * 1.0f / total);
					OnPostprocessAnimation(go);
					i++;
				}	
			}
		}
		catch (Exception)
		{

		}
		finally
		{
			EditorUtility.ClearProgressBar();
			AssetDatabase.Refresh();
			AssetDatabase.SaveAssets();
			Debug.Log("Tools/Animation/Optimize Animation: total[" + total + "]");
		}

	}

	static void OnPostprocessAnimation(AnimationClip theAnimation)
	{
		try
		{
			//去除scale曲线
			foreach (EditorCurveBinding theCurveBinding in AnimationUtility.GetCurveBindings(theAnimation))
			{
				string name = theCurveBinding.propertyName.ToLower();
				if (name.Contains("scale"))
				{
					AnimationUtility.SetEditorCurve(theAnimation, theCurveBinding, null);
				}
			}

			//浮点数精度压缩到f3
			AnimationClipCurveData[] curves = null;
			curves = AnimationUtility.GetAllCurves(theAnimation);
			Keyframe key;
			Keyframe[] keyFrames;
			for (int ii = 0; ii < curves.Length; ++ii)
			{
				AnimationClipCurveData curveDate = curves[ii];
				if (curveDate.curve == null || curveDate.curve.keys == null)
				{
					//Debug.LogWarning(string.Format("AnimationClipCurveData {0} don\'t have curve; Animation name {1} ", curveDate, animationPath));
					continue;
				}
				keyFrames = curveDate.curve.keys;
				for (int i = 0; i < keyFrames.Length; i++)
				{
					key = keyFrames[i];
					key.value = float.Parse(key.value.ToString("f3"));
					key.inTangent = float.Parse(key.inTangent.ToString("f3"));
					key.outTangent = float.Parse(key.outTangent.ToString("f3"));
					keyFrames[i] = key;
				}
				curveDate.curve.keys = keyFrames;
				theAnimation.SetCurve(curveDate.path, curveDate.type, curveDate.propertyName, curveDate.curve);
			}
		}
		catch (Exception e)
		{
			Debug.LogError(string.Format("CompressAnimationClip Failed !!! animationPath : {0} error: {1}", theAnimation.name, e));
		}
	}
}