osu/osu.Game.Rulesets.Osu/Mods/OsuModDepth.cs

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// 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.
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using System;
using System.Linq;
using osu.Framework.Bindables;
using osu.Framework.Graphics.Sprites;
using osu.Framework.Localisation;
using osu.Game.Configuration;
using osu.Game.Rulesets.Mods;
using osu.Game.Rulesets.Objects.Drawables;
using osu.Game.Rulesets.Osu.Objects;
using osu.Game.Rulesets.Osu.Objects.Drawables;
using osu.Game.Rulesets.Osu.UI;
using osu.Game.Rulesets.UI;
using osuTK;
namespace osu.Game.Rulesets.Osu.Mods
{
public class OsuModDepth : ModWithVisibilityAdjustment, IUpdatableByPlayfield, IApplicableToDrawableRuleset<OsuHitObject>
{
public override string Name => "Depth";
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public override string Acronym => "DP";
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public override IconUsage? Icon => FontAwesome.Solid.Cube;
public override ModType Type => ModType.Fun;
public override LocalisableString Description => "3D. Almost.";
public override double ScoreMultiplier => 1;
public override Type[] IncompatibleMods => base.IncompatibleMods.Concat(new[] { typeof(OsuModMagnetised), typeof(OsuModRepel), typeof(OsuModFreezeFrame), typeof(ModWithVisibilityAdjustment) }).ToArray();
private static readonly Vector3 camera_position = new Vector3(OsuPlayfield.BASE_SIZE.X * 0.5f, OsuPlayfield.BASE_SIZE.Y * 0.5f, -200);
private readonly float sliderMinDepth = depthForScale(1.5f); // Depth at which slider's scale will be 1.5f
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[SettingSource("Maximum depth", "How far away objects appear.", 0)]
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public BindableFloat MaxDepth { get; } = new BindableFloat(100)
{
Precision = 10,
MinValue = 50,
MaxValue = 200
};
[SettingSource("Show Approach Circles", "Whether approach circles should be visible.", 1)]
public BindableBool ShowApproachCircles { get; } = new BindableBool(true);
protected override void ApplyIncreasedVisibilityState(DrawableHitObject hitObject, ArmedState state) => applyTransform(hitObject, state);
protected override void ApplyNormalVisibilityState(DrawableHitObject hitObject, ArmedState state) => applyTransform(hitObject, state);
public void ApplyToDrawableRuleset(DrawableRuleset<OsuHitObject> drawableRuleset)
{
// Hide judgment displays and follow points as they won't make any sense.
// Judgements can potentially be turned on in a future where they display at a position relative to their drawable counterpart.
drawableRuleset.Playfield.DisplayJudgements.Value = false;
(drawableRuleset.Playfield as OsuPlayfield)?.FollowPoints.Hide();
}
private void applyTransform(DrawableHitObject drawable, ArmedState state)
{
switch (drawable)
{
case DrawableHitCircle circle:
if (!ShowApproachCircles.Value)
{
var hitObject = (OsuHitObject)drawable.HitObject;
double appearTime = hitObject.StartTime - hitObject.TimePreempt;
using (circle.BeginAbsoluteSequence(appearTime))
circle.ApproachCircle.Hide();
}
break;
}
}
public void Update(Playfield playfield)
{
double time = playfield.Time.Current;
foreach (var drawable in playfield.HitObjectContainer.AliveObjects)
{
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switch (drawable)
{
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case DrawableHitCircle circle:
processHitObject(time, circle);
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break;
case DrawableSlider slider:
processSlider(time, slider);
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break;
}
}
}
private void processHitObject(double time, DrawableOsuHitObject drawable)
{
var hitObject = drawable.HitObject;
// Circles are always moving at the constant speed. They'll fade out before reaching the camera even at extreme conditions (AR 11, max depth).
double speed = MaxDepth.Value / hitObject.TimePreempt;
double appearTime = hitObject.StartTime - hitObject.TimePreempt;
float z = MaxDepth.Value - (float)((Math.Max(time, appearTime) - appearTime) * speed);
float scale = scaleForDepth(z);
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drawable.Position = toPlayfieldPosition(scale, hitObject.StackedPosition);
drawable.Scale = new Vector2(scale);
}
private void processSlider(double time, DrawableSlider drawableSlider)
{
var hitObject = drawableSlider.HitObject;
double baseSpeed = MaxDepth.Value / hitObject.TimePreempt;
double appearTime = hitObject.StartTime - hitObject.TimePreempt;
// Allow slider to move at a constant speed if its scale at the end time will be lower than 1.5f
float zEnd = MaxDepth.Value - (float)((Math.Max(hitObject.StartTime + hitObject.Duration, appearTime) - appearTime) * baseSpeed);
if (zEnd > sliderMinDepth)
{
processHitObject(time, drawableSlider);
return;
}
double offsetAfterStartTime = hitObject.Duration + 500;
double slowSpeed = Math.Min(-sliderMinDepth / offsetAfterStartTime, baseSpeed);
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double decelerationTime = hitObject.TimePreempt * 0.2;
float decelerationDistance = (float)(decelerationTime * (baseSpeed + slowSpeed) * 0.5);
float z;
if (time < hitObject.StartTime - decelerationTime)
{
float fullDistance = decelerationDistance + (float)(baseSpeed * (hitObject.TimePreempt - decelerationTime));
z = fullDistance - (float)((Math.Max(time, appearTime) - appearTime) * baseSpeed);
}
else if (time < hitObject.StartTime)
{
double timeOffset = time - (hitObject.StartTime - decelerationTime);
double deceleration = (slowSpeed - baseSpeed) / decelerationTime;
z = decelerationDistance - (float)(baseSpeed * timeOffset + deceleration * timeOffset * timeOffset * 0.5);
}
else
{
double endTime = hitObject.StartTime + offsetAfterStartTime;
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z = -(float)((Math.Min(time, endTime) - hitObject.StartTime) * slowSpeed);
}
float scale = scaleForDepth(z);
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drawableSlider.Position = toPlayfieldPosition(scale, hitObject.StackedPosition);
drawableSlider.Scale = new Vector2(scale);
}
private static float scaleForDepth(float depth) => -camera_position.Z / Math.Max(1f, depth - camera_position.Z);
private static float depthForScale(float scale) => -camera_position.Z / scale + camera_position.Z;
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private static Vector2 toPlayfieldPosition(float scale, Vector2 positionAtZeroDepth)
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{
return (positionAtZeroDepth - camera_position.Xy) * scale + camera_position.Xy;
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}
}
}