unity性能优化之降低动画文件的大小

     Animation是Unity中的动画文件,主要内容由一个个关键帧数据构成。通过将Unity的资源序列化方式调整为Text,就可以以文本方式查看动画文件。通过菜单项Edit -> Project Settings -> Editor打开Editor Settings窗口,就可以设置资源序列化方式
      


打开一个anim文件看里面内容：里面使用的浮点数精度都比较高，因此我们可以通过降低精度的方式来减小动画文件的大小
      




具体做法查看以下代码：void OnPostprocessModel(GameObject g) {
List<AnimationClip> animationClipList = new List<AnimationClip>(AnimationUtility.GetAnimationClips(g));
if (animationClipList.Count == 0) {
AnimationClip[] objectList = UnityEngine.Object.FindObjectsOfType (typeof(AnimationClip)) as AnimationClip[];
animationClipList.AddRange(objectList);
}

foreach (AnimationClip theAnimation in animationClipList)
{

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)
{
continue;
}
keyFrames = curveDate.curve.keys;
for (int i = 0; i < keyFrames.Length; i++)
{
key = keyFrames[i];
key.value = float
4000
.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 (System.Exception e)
{
Debug.LogError(string.Format("CompressAnimationClip Failed !!! animationPath : {0} error: {1}", assetPath, e));
}
}
}