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Created July 5, 2020 05:59
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A Script To Reverse Your Unity Animation Clip
using UnityEditor;
using UnityEngine;
using System.IO;
public static class ReverseAnimationContext
[MenuItem("Assets/Create Reversed Clip", false, 14)]
private static void ReverseClip()
string directoryPath = Path.GetDirectoryName(AssetDatabase.GetAssetPath(Selection.activeObject));
string fileName = Path.GetFileName(AssetDatabase.GetAssetPath(Selection.activeObject));
string fileExtension = Path.GetExtension(AssetDatabase.GetAssetPath(Selection.activeObject));
fileName = fileName.Split('.')[0];
string copiedFilePath = directoryPath + Path.DirectorySeparatorChar + fileName + "_Reversed" + fileExtension;
var clip = GetSelectedClip();
AssetDatabase.CopyAsset(AssetDatabase.GetAssetPath(Selection.activeObject), copiedFilePath);
clip = (AnimationClip)AssetDatabase.LoadAssetAtPath(copiedFilePath, typeof(AnimationClip));
if (clip == null)
float clipLength = clip.length;
var curves = AnimationUtility.GetAllCurves(clip, true);
foreach (AnimationClipCurveData curve in curves)
var keys = curve.curve.keys;
int keyCount = keys.Length;
var postWrapmode = curve.curve.postWrapMode;
curve.curve.postWrapMode = curve.curve.preWrapMode;
curve.curve.preWrapMode = postWrapmode;
for (int i = 0; i < keyCount; i++)
Keyframe K = keys[i];
K.time = clipLength - K.time;
var tmp = -K.inTangent;
K.inTangent = -K.outTangent;
K.outTangent = tmp;
keys[i] = K;
curve.curve.keys = keys;
clip.SetCurve(curve.path, curve.type, curve.propertyName, curve.curve);
var events = AnimationUtility.GetAnimationEvents(clip);
if (events.Length > 0)
for (int i = 0; i < events.Length; i++)
events[i].time = clipLength - events[i].time;
AnimationUtility.SetAnimationEvents(clip, events);
Debug.Log("Animation reversed!");
[MenuItem("Assets/Create Reversed Clip", true)]
static bool ReverseClipValidation()
return Selection.activeObject.GetType() == typeof(AnimationClip);
public static AnimationClip GetSelectedClip()
var clips = Selection.GetFiltered(typeof(AnimationClip), SelectionMode.Assets);
if (clips.Length > 0)
return clips[0] as AnimationClip;
return null;
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TheIndieDream commented Sep 30, 2021

Hi Pikachuxxxx,

This is an excellent and very helpful tool for reversing animations in Unity - Thank you so much for your contribution!

Unfortunately, the method "AnimationUtility.GetAllCurves()" is obsolete. I adapted your script to use what Unity suggests in its stead. I tried to give you as much credit as possible, because I really didn't do much!

You can find the adapted script here:

Hope this helps and thanks again for taking the time to make this post a while back!

Best Regards,
Brandon Lyman

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