From 28185178d60ab2ff188fc15d7ebd417ff9aacdfa Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Mon, 10 Oct 2022 16:51:50 +0900
Subject: [PATCH] Add support for weird storyboards which have backwards events

Closes https://github.com/ppy/osu/issues/20632.
Not adding test coverage because this is just weird.
---
 osu.Game/Storyboards/CommandTimeline.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/osu.Game/Storyboards/CommandTimeline.cs b/osu.Game/Storyboards/CommandTimeline.cs
index 4d0da9597b..d1a1edcd03 100644
--- a/osu.Game/Storyboards/CommandTimeline.cs
+++ b/osu.Game/Storyboards/CommandTimeline.cs
@@ -27,7 +27,10 @@ public class CommandTimeline<T> : ICommandTimeline
         public void Add(Easing easing, double startTime, double endTime, T startValue, T endValue)
         {
             if (endTime < startTime)
-                return;
+            {
+                (startTime, endTime) = (endTime, startTime);
+                (startValue, endValue) = (endValue, startValue);
+            }
 
             commands.Add(new TypedCommand { Easing = easing, StartTime = startTime, EndTime = endTime, StartValue = startValue, EndValue = endValue });