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This commit is contained in:
Endrik Tombak 2020-11-21 14:26:09 +02:00
parent 6c5a6b42e5
commit 72d9da5fac
2 changed files with 18 additions and 21 deletions
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25
osu.Game/OsuGame.cs
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@ -335,11 +335,15 @@ namespace osu.Game
/// The user should have already requested this interactively.
/// </summary>
/// <param name="beatmap">The beatmap to select.</param>
/// <param name="difficultyCriteria">
/// Optional predicate used to filter which difficulties to select.
/// If omitted, this will try to present a recommended beatmap from the current ruleset.
/// In case of failure the first difficulty of the set will be presented, ignoring the predicate.
/// </param>
/// <param name="difficultyCriteria">Optional predicate used to narrow the set of difficulties to select from when presenting.</param>
/// <remarks>
/// Among items satisfying the predicate, the order of preference is:
/// <list type="bullet">
/// <item>beatmap with recommended difficulty, as provided by <see cref="DifficultyRecommender"/>,</item>
/// <item>first beatmap from the current ruleset,</item>
/// <item>first beatmap from any ruleset.</item>
/// </list>
/// </remarks>
public void PresentBeatmap(BeatmapSetInfo beatmap, Predicate<BeatmapInfo> difficultyCriteria = null)
{
var databasedSet = beatmap.OnlineBeatmapSetID != null
@ -373,11 +377,12 @@ namespace osu.Game
// Try to select recommended beatmap
// This should give us a beatmap from current ruleset if there are any in our matched beatmaps
var selection = DifficultyRecommender.GetRecommendedBeatmap(beatmaps) ?? (
// Fallback if a difficulty can't be recommended, maybe we are offline
// First try to find a beatmap in current ruleset, otherwise use first beatmap
beatmaps.FirstOrDefault(b => b.Ruleset.Equals(Ruleset.Value)) ?? beatmaps.First()
);
var selection = DifficultyRecommender.GetRecommendedBeatmap(beatmaps);
// Fallback if a difficulty can't be recommended, maybe we are offline
// First try to find a beatmap in current ruleset
selection ??= beatmaps.FirstOrDefault(b => b.Ruleset.Equals(Ruleset.Value));
// Otherwise use first beatmap
selection ??= beatmaps.First();
Ruleset.Value = selection.Ruleset;
Beatmap.Value = BeatmapManager.GetWorkingBeatmap(selection);

14
osu.Game/Screens/Select/DifficultyRecommender.cs
View File

@ -81,7 +81,6 @@ namespace osu.Game.Screens.Select
req.Success += result =>
{
bestRulesetOrder = null;
// algorithm taken from https://github.com/ppy/osu-web/blob/e6e2825516449e3d0f3f5e1852c6bdd3428c3437/app/Models/User.php#L1505
recommendedStarDifficulty[rulesetInfo] = Math.Pow((double)(result.Statistics.PP ?? 0), 0.4) * 0.195;
};
@ -90,19 +89,12 @@ namespace osu.Game.Screens.Select
});
}
private IEnumerable<RulesetInfo> bestRulesetOrder;
private IEnumerable<RulesetInfo> getBestRulesetOrder()
{
bestRulesetOrder ??= recommendedStarDifficulty.OrderByDescending(pair => pair.Value)
.Select(pair => pair.Key)
.ToList();
IEnumerable<RulesetInfo> bestRulesetOrder = recommendedStarDifficulty.OrderByDescending(pair => pair.Value)
.Select(pair => pair.Key)
.ToList();
return moveCurrentRulesetToFirst();
}
private IEnumerable<RulesetInfo> moveCurrentRulesetToFirst()
{
List<RulesetInfo> orderedRulesets;
if (bestRulesetOrder.Contains(ruleset.Value))