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osu-lazer/osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSliderBall.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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#nullable disable
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using System;
using osu.Framework.Allocation;
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using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Game.Rulesets.Objects.Drawables;
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using osu.Game.Rulesets.Objects.Types;
using osu.Game.Rulesets.Osu.Skinning.Default;
using osu.Game.Screens.Play;
using osu.Game.Skinning;
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using osuTK;
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namespace osu.Game.Rulesets.Osu.Objects.Drawables
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{
public partial class DrawableSliderBall : CircularContainer, ISliderProgress
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{
public const float FOLLOW_AREA = 2.4f;
private DrawableSlider drawableSlider;
private Drawable ball;
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[BackgroundDependencyLoader]
private void load(DrawableHitObject drawableSlider)
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{
this.drawableSlider = (DrawableSlider)drawableSlider;
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Origin = Anchor.Centre;
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Size = OsuHitObject.OBJECT_DIMENSIONS;
Children = new[]
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{
new SkinnableDrawable(new OsuSkinComponentLookup(OsuSkinComponents.SliderFollowCircle), _ => new DefaultFollowCircle())
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{
Origin = Anchor.Centre,
Anchor = Anchor.Centre,
RelativeSizeAxes = Axes.Both,
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},
ball = new SkinnableDrawable(new OsuSkinComponentLookup(OsuSkinComponents.SliderBall), _ => new DefaultSliderBall())
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{
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
},
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};
}
public override void ClearTransformsAfter(double time, bool propagateChildren = false, string targetMember = null)
{
// Consider the case of rewinding - children's transforms are handled internally, so propagating down
// any further will cause weirdness with the Tracking bool below. Let's not propagate further at this point.
base.ClearTransformsAfter(time, false, targetMember);
}
public override void ApplyTransformsAt(double time, bool propagateChildren = false)
{
// For the same reasons as above w.r.t rewinding, we shouldn't propagate to children here either.
// ReSharper disable once RedundantArgumentDefaultValue
base.ApplyTransformsAt(time, false);
}
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private Vector2? lastPosition;
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public void UpdateProgress(double completionProgress)
{
Position = drawableSlider.HitObject.CurvePositionAt(completionProgress);
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var diff = lastPosition.HasValue ? lastPosition.Value - Position : Position - drawableSlider.HitObject.CurvePositionAt(completionProgress + 0.01f);
bool rewinding = (Clock as IGameplayClock)?.IsRewinding == true;
// Ensure the value is substantially high enough to allow for Atan2 to get a valid angle.
if (diff.LengthFast < 0.01f)
return;
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ball.Rotation = -90 + (float)(-Math.Atan2(diff.X, diff.Y) * 180 / Math.PI) + (rewinding ? 180 : 0);
lastPosition = Position;
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}
}
}