diff --git a/osu.Game.Rulesets.Osu/Utils/OsuHitObjectGenerationUtils_Reposition.cs b/osu.Game.Rulesets.Osu/Utils/OsuHitObjectGenerationUtils_Reposition.cs
index a77d1f8b0f70..477ef2d55de2 100644
--- a/osu.Game.Rulesets.Osu/Utils/OsuHitObjectGenerationUtils_Reposition.cs
+++ b/osu.Game.Rulesets.Osu/Utils/OsuHitObjectGenerationUtils_Reposition.cs
@@ -198,6 +198,27 @@ private static Vector2 clampSliderToPlayfield(WorkingObject workingObject)
var slider = (Slider)workingObject.HitObject;
var possibleMovementBounds = calculatePossibleMovementBounds(slider);
+ // The slider rotation applied in computeModifiedPosition might make it impossible to fit the slider into the playfield
+ // For example, a long horizontal slider will be off-screen when rotated by 90 degrees
+ // In this case, limit the rotation to either 0 or 180 degrees
+ if (possibleMovementBounds.Width < 0 || possibleMovementBounds.Height < 0)
+ {
+ float currentRotation = getSliderRotation(slider);
+ float diff1 = getAngleDifference(workingObject.RotationOriginal, currentRotation);
+ float diff2 = getAngleDifference(workingObject.RotationOriginal + MathF.PI, currentRotation);
+
+ if (diff1 < diff2)
+ {
+ RotateSlider(slider, workingObject.RotationOriginal - getSliderRotation(slider));
+ }
+ else
+ {
+ RotateSlider(slider, workingObject.RotationOriginal + MathF.PI - getSliderRotation(slider));
+ }
+
+ possibleMovementBounds = calculatePossibleMovementBounds(slider);
+ }
+
var previousPosition = workingObject.PositionModified;
// Clamp slider position to the placement area
@@ -355,6 +376,18 @@ private static float getSliderRotation(Slider slider)
return MathF.Atan2(endPositionVector.Y, endPositionVector.X);
}
+ ///
+ /// Get the absolute difference between 2 angles measured in Radians.
+ ///
+ /// The first angle
+ /// The second angle
+ /// The absolute difference with interval [0, MathF.PI)
+ private static float getAngleDifference(float angle1, float angle2)
+ {
+ float diff = MathF.Abs(angle1 - angle2) % (MathF.PI * 2);
+ return MathF.Min(diff, MathF.PI * 2 - diff);
+ }
+
public class ObjectPositionInfo
{
///
@@ -397,6 +430,7 @@ public ObjectPositionInfo(OsuHitObject hitObject)
private class WorkingObject
{
+ public float RotationOriginal { get; }
public Vector2 PositionOriginal { get; }
public Vector2 PositionModified { get; set; }
public Vector2 EndPositionModified { get; set; }
@@ -407,6 +441,7 @@ private class WorkingObject
public WorkingObject(ObjectPositionInfo positionInfo)
{
PositionInfo = positionInfo;
+ RotationOriginal = HitObject is Slider slider ? getSliderRotation(slider) : 0;
PositionModified = PositionOriginal = HitObject.Position;
EndPositionModified = HitObject.EndPosition;
}