osu/osu.Game.Rulesets.Osu/Mods/OsuModFlashlight.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.Collections.Generic;
using System.Linq;
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using osu.Framework.Bindables;
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using osu.Framework.Graphics;
using osu.Framework.Input;
using osu.Framework.Input.Events;
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using osu.Framework.Utils;
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using osu.Game.Rulesets.Mods;
using osu.Game.Rulesets.Objects.Drawables;
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using osu.Game.Rulesets.Osu.Objects;
using osu.Game.Rulesets.Osu.Objects.Drawables;
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using osuTK;
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namespace osu.Game.Rulesets.Osu.Mods
{
public class OsuModFlashlight : ModFlashlight<OsuHitObject>, IApplicableToDrawableHitObjects
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{
public override double ScoreMultiplier => 1.12;
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private const float default_flashlight_size = 180;
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private OsuFlashlight flashlight;
public override Flashlight CreateFlashlight() => flashlight = new OsuFlashlight();
public void ApplyToDrawableHitObjects(IEnumerable<DrawableHitObject> drawables)
{
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foreach (var s in drawables.OfType<DrawableSlider>())
{
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s.Tracking.ValueChanged += flashlight.OnSliderTrackingChange;
}
}
private class OsuFlashlight : Flashlight, IRequireHighFrequencyMousePosition
{
public OsuFlashlight()
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{
FlashlightSize = new Vector2(0, getSizeFor(0));
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}
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public void OnSliderTrackingChange(ValueChangedEvent<bool> e)
{
// If a slider is in a tracking state, a further dim should be applied to the (remaining) visible portion of the playfield over a brief duration.
this.TransformTo(nameof(FlashlightDim), e.NewValue ? 0.8f : 0.0f, 50);
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}
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protected override bool OnMouseMove(MouseMoveEvent e)
{
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const double follow_delay = 120;
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var position = FlashlightPosition;
var destination = e.MousePosition;
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FlashlightPosition = Interpolation.ValueAt(
Math.Clamp(Clock.ElapsedFrameTime, 0, follow_delay), position, destination, 0, follow_delay, Easing.Out);
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return base.OnMouseMove(e);
}
private float getSizeFor(int combo)
{
if (combo > 200)
return default_flashlight_size * 0.8f;
else if (combo > 100)
return default_flashlight_size * 0.9f;
else
return default_flashlight_size;
}
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protected override void OnComboChange(ValueChangedEvent<int> e)
{
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this.TransformTo(nameof(FlashlightSize), new Vector2(0, getSizeFor(e.NewValue)), FLASHLIGHT_FADE_DURATION);
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}
protected override string FragmentShader => "CircularFlashlight";
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}
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}
}