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osu-lazer/osu.Game.Rulesets.Taiko/Objects/Drawables/DrawableBarLine.cs

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// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
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using OpenTK;
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namespace osu.Game.Rulesets.Taiko.Objects.Drawables
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{
/// <summary>
/// A line that scrolls alongside hit objects in the playfield and visualises control points.
/// </summary>
public class DrawableBarLine : Container
{
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/// <summary>
/// The width of the line tracker.
/// </summary>
private const float tracker_width = 2f;
/// <summary>
/// Fade out time calibrated to a pre-empt of 1000ms.
/// </summary>
private const float base_fadeout_time = 100f;
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/// <summary>
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/// The visual line tracker.
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/// </summary>
protected Box Tracker;
/// <summary>
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/// The bar line.
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/// </summary>
protected readonly BarLine BarLine;
public DrawableBarLine(BarLine barLine)
{
BarLine = barLine;
Anchor = Anchor.CentreLeft;
Origin = Anchor.Centre;
RelativePositionAxes = Axes.X;
RelativeSizeAxes = Axes.Y;
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Width = tracker_width;
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Children = new[]
{
Tracker = new Box
{
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
RelativeSizeAxes = Axes.Both,
EdgeSmoothness = new Vector2(0.5f, 0),
Alpha = 0.75f
}
};
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LifetimeStart = BarLine.StartTime - BarLine.ScrollTime * 2;
LifetimeEnd = BarLine.StartTime + BarLine.ScrollTime;
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}
protected override void LoadComplete()
{
base.LoadComplete();
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AddDelay(BarLine.StartTime - Time.Current);
this.FadeOut(base_fadeout_time * BarLine.ScrollTime / 1000);
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}
private void updateScrollPosition(double time) => this.MoveToX((float)((BarLine.StartTime - time) / BarLine.ScrollTime));
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protected override void Update()
{
base.Update();
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updateScrollPosition(Time.Current);
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}
}
}