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Code Issues Releases Wiki Activity

Limit slider rotation when the slider is too large

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This commit is contained in:
Henry Lin 2022-06-07 10:32:51 +08:00
parent 86b685f7e4
commit de224e79c7
1 changed files with 35 additions and 0 deletions
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35
osu.Game.Rulesets.Osu/Utils/OsuHitObjectGenerationUtils_Reposition.cs
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@ -198,6 +198,27 @@ namespace osu.Game.Rulesets.Osu.Utils
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 @@ namespace osu.Game.Rulesets.Osu.Utils
return MathF.Atan2(endPositionVector.Y, endPositionVector.X);
}
/// <summary>
/// Get the absolute difference between 2 angles measured in Radians.
/// </summary>
/// <param name="angle1">The first angle</param>
/// <param name="angle2">The second angle</param>
/// <returns>The absolute difference with interval <c>[0, MathF.PI)</c></returns>
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
{
/// <summary>
@ -397,6 +430,7 @@ namespace osu.Game.Rulesets.Osu.Utils
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 @@ namespace osu.Game.Rulesets.Osu.Utils
public WorkingObject(ObjectPositionInfo positionInfo)
{
PositionInfo = positionInfo;
RotationOriginal = HitObject is Slider slider ? getSliderRotation(slider) : 0;
PositionModified = PositionOriginal = HitObject.Position;
EndPositionModified = HitObject.EndPosition;
}