From 0341023d13cf7926a04d67852ec995874e10e79f Mon Sep 17 00:00:00 2001
From: Naxess <30292137+Naxesss@users.noreply.github.com>
Date: Thu, 8 Apr 2021 09:06:28 +0200
Subject: [PATCH] Improve UX of selecting PerfectCurve

---
 .../Components/PathControlPointVisualiser.cs     | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointVisualiser.cs b/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointVisualiser.cs
index ff2e4ea152..0b163cbc44 100644
--- a/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointVisualiser.cs
+++ b/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointVisualiser.cs
@@ -162,6 +162,22 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
         /// <param name="type">The path type we want to assign to the given control point piece.</param>
         private void updatePathType(PathControlPointPiece piece, PathType? type)
         {
+            int indexInSegment = piece.PointsInSegment.IndexOf(piece.ControlPoint);
+
+            switch (type)
+            {
+                case PathType.PerfectCurve:
+                    if (piece.PointsInSegment.Count > 3)
+                    {
+                        // Can't always create a circular arc out of 4 or more points,
+                        // so we split the segment into one 3-point circular arc segment
+                        // and one bezier segment.
+                        piece.PointsInSegment[indexInSegment + 2].Type.Value = PathType.Bezier;
+                    }
+
+                    break;
+            }
+
             piece.ControlPoint.Type.Value = type;
         }