mirror of https://github.com/ppy/osu
54 lines
1.6 KiB
C#
54 lines
1.6 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System;
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using osu.Framework.Allocation;
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using osu.Framework.Graphics;
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using osu.Framework.Graphics.Shapes;
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using osu.Framework.Utils;
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using osu.Game.Graphics;
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namespace osu.Game.Screens.Play.HUD
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{
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/// <summary>
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/// An overlay layer on top of the playfield which fades to red when the current player health falls below a certain threshold defined by <see cref="LowHealthThreshold"/>.
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/// </summary>
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public class FailingLayer : HealthDisplay
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{
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private const float max_alpha = 0.4f;
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private const int fade_time = 400;
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private readonly Box box;
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/// <summary>
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/// The threshold under which the current player life should be considered low and the layer should start fading in.
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/// </summary>
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public double LowHealthThreshold = 0.20f;
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public FailingLayer()
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{
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RelativeSizeAxes = Axes.Both;
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Child = box = new Box
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{
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RelativeSizeAxes = Axes.Both,
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Alpha = 0
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};
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}
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[BackgroundDependencyLoader]
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private void load(OsuColour color)
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{
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box.Colour = color.Red;
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}
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protected override void Update()
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{
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box.Alpha = (float)Interpolation.ValueAt(Math.Clamp(Clock.ElapsedFrameTime, 0, fade_time), box.Alpha,
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Math.Clamp(max_alpha * (1 - Current.Value / LowHealthThreshold), 0, max_alpha), 0, fade_time, Easing.Out);
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base.Update();
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}
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}
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}
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