osu/osu.Game.Rulesets.Catch/Beatmaps/CatchBeatmapProcessor.cs

125 lines
4.8 KiB
C#

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
using System.Collections.Generic;
using System.Linq;
using osu.Game.Beatmaps;
using osu.Game.Rulesets.Catch.Objects;
using osu.Game.Rulesets.Catch.UI;
using osu.Game.Rulesets.Objects.Types;
using osuTK;
using osu.Game.Rulesets.Catch.MathUtils;
namespace osu.Game.Rulesets.Catch.Beatmaps
{
public class CatchBeatmapProcessor : BeatmapProcessor
{
public const int RNG_SEED = 1337;
public CatchBeatmapProcessor(IBeatmap beatmap)
: base(beatmap)
{
}
public override void PostProcess()
{
base.PostProcess();
applyPositionOffsets();
initialiseHyperDash((List<CatchHitObject>)Beatmap.HitObjects);
int index = 0;
foreach (var obj in Beatmap.HitObjects.OfType<CatchHitObject>())
{
obj.IndexInBeatmap = index++;
if (obj.LastInCombo && obj.NestedHitObjects.LastOrDefault() is IHasComboInformation lastNested)
lastNested.LastInCombo = true;
}
}
private void applyPositionOffsets()
{
var rng = new FastRandom(RNG_SEED);
// todo: HardRock displacement should be applied here
foreach (var obj in Beatmap.HitObjects)
{
switch (obj)
{
case BananaShower bananaShower:
foreach (var banana in bananaShower.NestedHitObjects.OfType<Banana>())
{
banana.X = (float)rng.NextDouble();
rng.Next(); // osu!stable retrieved a random banana type
rng.Next(); // osu!stable retrieved a random banana rotation
rng.Next(); // osu!stable retrieved a random banana colour
}
break;
case JuiceStream juiceStream:
foreach (var nested in juiceStream.NestedHitObjects)
{
var hitObject = (CatchHitObject)nested;
if (hitObject is TinyDroplet)
hitObject.X += rng.Next(-20, 20) / CatchPlayfield.BASE_WIDTH;
else if (hitObject is Droplet)
rng.Next(); // osu!stable retrieved a random droplet rotation
hitObject.X = MathHelper.Clamp(hitObject.X, 0, 1);
}
break;
}
}
}
private void initialiseHyperDash(List<CatchHitObject> objects)
{
List<CatchHitObject> objectWithDroplets = new List<CatchHitObject>();
foreach (var currentObject in objects)
{
if (currentObject is Fruit)
objectWithDroplets.Add(currentObject);
if (currentObject is JuiceStream)
foreach (var currentJuiceElement in currentObject.NestedHitObjects)
if (!(currentJuiceElement is TinyDroplet))
objectWithDroplets.Add((CatchHitObject)currentJuiceElement);
}
objectWithDroplets.Sort((h1, h2) => h1.StartTime.CompareTo(h2.StartTime));
double halfCatcherWidth = CatcherArea.GetCatcherSize(Beatmap.BeatmapInfo.BaseDifficulty) / 2;
int lastDirection = 0;
double lastExcess = halfCatcherWidth;
for (int i = 0; i < objectWithDroplets.Count - 1; i++)
{
CatchHitObject currentObject = objectWithDroplets[i];
CatchHitObject nextObject = objectWithDroplets[i + 1];
int thisDirection = nextObject.X > currentObject.X ? 1 : -1;
double timeToNext = nextObject.StartTime - currentObject.StartTime - 1000f / 60f / 4; // 1/4th of a frame of grace time, taken from osu-stable
double distanceToNext = Math.Abs(nextObject.X - currentObject.X) - (lastDirection == thisDirection ? lastExcess : halfCatcherWidth);
float distanceToHyper = (float)(timeToNext * CatcherArea.Catcher.BASE_SPEED - distanceToNext);
if (distanceToHyper < 0)
{
currentObject.HyperDashTarget = nextObject;
lastExcess = halfCatcherWidth;
}
else
{
currentObject.DistanceToHyperDash = distanceToHyper;
lastExcess = MathHelper.Clamp(distanceToHyper, 0, halfCatcherWidth);
}
lastDirection = thisDirection;
}
}
}
}