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Code Issues Releases Wiki Activity

Fix ticks in repeat spans being returned in reverse order

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This commit is contained in:
smoogipoo 2019-08-01 17:31:26 +09:00
parent b3044ed18d
commit a2468e599b
1 changed files with 44 additions and 16 deletions
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60
osu.Game/Rulesets/Objects/SliderEventGenerator.cs
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@ -3,13 +3,15 @@
using System;
using System.Collections.Generic;
using System.Linq;
using osuTK;
namespace osu.Game.Rulesets.Objects
{
public static class SliderEventGenerator
{
public static IEnumerable<SliderEventDescriptor> Generate(double startTime, double spanDuration, double velocity, double tickDistance, double totalDistance, int spanCount, double? legacyLastTickOffset)
public static IEnumerable<SliderEventDescriptor> Generate(double startTime, double spanDuration, double velocity, double tickDistance, double totalDistance, int spanCount,
double? legacyLastTickOffset)
{
// A very lenient maximum length of a slider for ticks to be generated.
// This exists for edge cases such as /b/1573664 where the beatmap has been edited by the user, and should never be reached in normal usage.
@ -36,24 +38,17 @@ namespace osu.Game.Rulesets.Objects
var spanStartTime = startTime + span * spanDuration;
var reversed = span % 2 == 1;
for (var d = tickDistance; d <= length; d += tickDistance)
var ticks = generateTicks(span, spanStartTime, spanDuration, reversed, length, tickDistance, minDistanceFromEnd);
if (reversed)
{
if (d >= length - minDistanceFromEnd)
break;
var pathProgress = d / length;
var timeProgress = reversed ? 1 - pathProgress : pathProgress;
yield return new SliderEventDescriptor
{
Type = SliderEventType.Tick,
SpanIndex = span,
SpanStartTime = spanStartTime,
Time = spanStartTime + timeProgress * spanDuration,
PathProgress = pathProgress,
};
// For repeat spans, ticks are returned in reverse-StartTime order, which is undesirable for some rulesets
ticks = ticks.Reverse();
}
foreach (var e in ticks)
yield return e;
if (span < spanCount - 1)
{
yield return new SliderEventDescriptor
@ -103,6 +98,39 @@ namespace osu.Game.Rulesets.Objects
PathProgress = spanCount % 2,
};
}
/// <summary>
/// Generates the ticks for a span of the slider.
/// </summary>
/// <param name="spanIndex">The span index.</param>
/// <param name="spanStartTime">The start time of the span.</param>
/// <param name="spanDuration">The duration of the span.</param>
/// <param name="reversed">Whether the span is reversed.</param>
/// <param name="length">The length of the path.</param>
/// <param name="tickDistance">The distance between each tick.</param>
/// <param name="minDistanceFromEnd">The distance from the end of the path at which ticks are not allowed to be added.</param>
/// <returns>A <see cref="SliderEventDescriptor"/> for each tick. If <paramref name="reversed"/> is true, the ticks will be returned in reverse-StartTime order.</returns>
private static IEnumerable<SliderEventDescriptor> generateTicks(int spanIndex, double spanStartTime, double spanDuration, bool reversed, double length, double tickDistance,
double minDistanceFromEnd)
{
for (var d = tickDistance; d <= length; d += tickDistance)
{
if (d >= length - minDistanceFromEnd)
break;
var pathProgress = d / length;
var timeProgress = reversed ? 1 - pathProgress : pathProgress;
yield return new SliderEventDescriptor
{
Type = SliderEventType.Tick,
SpanIndex = spanIndex,
SpanStartTime = spanStartTime,
Time = spanStartTime + timeProgress * spanDuration,
PathProgress = pathProgress,
};
}
}
}
/// <summary>