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Nearly straight sliders are treated as linear

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This commit is contained in:
Aurelian 2024-05-24 08:26:17 +02:00
parent d47c4cb479
commit d948e0fc5c
1 changed files with 35 additions and 0 deletions
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35
osu.Game/Rulesets/Objects/SliderPath.cs
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@ -269,6 +269,37 @@ namespace osu.Game.Rulesets.Objects
pathCache.Validate();
}
/// <summary>
/// Checks if the array of vectors is almost straight.
/// </summary>
/// <para>
/// The angle is first obtained based on the farthest vector from the first,
/// then we find the angle of each vector from the first,
/// and calculate the distance between the two angle vectors.
/// We than scale this distance to the distance from the first vector
/// (or by 10 if the distance is smaller),
/// and if it is greater than acceptableDifference, we return false.
/// </para>
private static bool isAlmostStraight(Vector2[] vectors, float acceptableDifference = 0.1f)
{
if (vectors.Length <= 2 || vectors.All(x => x == vectors.First())) return true;
Vector2 first = vectors.First();
Vector2 farthest = vectors.MaxBy(x => Vector2.Distance(first, x));
Vector2 angle = Vector2.Normalize(farthest - first);
foreach (Vector2 vector in vectors)
{
if (vector == first)
continue;
if (Math.Max(10.0f, Vector2.Distance(vector, first)) * Vector2.Distance(Vector2.Normalize(vector - first), angle) > acceptableDifference)
return false;
}
return true;
}
private void calculatePath()
{
calculatedPath.Clear();
@ -293,6 +324,10 @@ namespace osu.Game.Rulesets.Objects
var segmentVertices = vertices.AsSpan().Slice(start, i - start + 1);
var segmentType = ControlPoints[start].Type ?? PathType.LINEAR;
//If a segment is almost straight, treat it as linear.
if (segmentType != PathType.LINEAR && isAlmostStraight(segmentVertices.ToArray()))
segmentType = PathType.LINEAR;
// No need to calculate path when there is only 1 vertex
if (segmentVertices.Length == 1)
calculatedPath.Add(segmentVertices[0]);