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160 lines
5.0 KiB
C#
160 lines
5.0 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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#nullable disable
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using System;
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using System.Collections.Generic;
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using osu.Framework.Allocation;
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using osu.Framework.Bindables;
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using osu.Framework.Graphics;
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using osu.Game.Rulesets.Objects.Drawables;
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using osu.Game.Rulesets.Objects.Types;
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using osu.Game.Rulesets.Osu.Objects;
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using osu.Game.Rulesets.Osu.Objects.Drawables;
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using osuTK;
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namespace osu.Game.Rulesets.Osu.Skinning.Default
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{
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/// <summary>
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/// A <see cref="SliderBody"/> which changes its curve depending on the snaking progress.
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/// </summary>
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public abstract class SnakingSliderBody : SliderBody, ISliderProgress
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{
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public readonly List<Vector2> CurrentCurve = new List<Vector2>();
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public readonly Bindable<bool> SnakingIn = new Bindable<bool>();
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public readonly Bindable<bool> SnakingOut = new Bindable<bool>();
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public double? SnakedStart { get; private set; }
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public double? SnakedEnd { get; private set; }
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public override float PathRadius
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{
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get => base.PathRadius;
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set
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{
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if (base.PathRadius == value)
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return;
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base.PathRadius = value;
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Refresh();
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}
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}
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public override Vector2 PathOffset => snakedPathOffset;
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/// <summary>
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/// The top-left position of the path when fully snaked.
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/// </summary>
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private Vector2 snakedPosition;
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/// <summary>
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/// The offset of the path from <see cref="snakedPosition"/> when fully snaked.
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/// </summary>
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private Vector2 snakedPathOffset;
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private DrawableSlider drawableSlider;
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[BackgroundDependencyLoader]
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private void load(DrawableHitObject drawableObject)
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{
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drawableSlider = (DrawableSlider)drawableObject;
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Refresh();
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}
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public void UpdateProgress(double completionProgress)
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{
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if (drawableSlider?.HitObject == null)
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return;
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Slider slider = drawableSlider.HitObject;
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int span = slider.SpanAt(completionProgress);
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double spanProgress = slider.ProgressAt(completionProgress);
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double start = 0;
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double end = SnakingIn.Value ? Math.Clamp((Time.Current - (slider.StartTime - slider.TimePreempt)) / (slider.TimePreempt / 3), 0, 1) : 1;
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if (span >= slider.SpanCount() - 1)
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{
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if (Math.Min(span, slider.SpanCount() - 1) % 2 == 1)
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{
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start = 0;
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end = SnakingOut.Value ? spanProgress : 1;
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}
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else
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{
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start = SnakingOut.Value ? spanProgress : 0;
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}
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}
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setRange(start, end);
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}
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public void Refresh()
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{
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if (drawableSlider?.HitObject == null)
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return;
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// Generate the entire curve
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drawableSlider.HitObject.Path.GetPathToProgress(CurrentCurve, 0, 1);
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SetVertices(CurrentCurve);
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// Force the body to be the final path size to avoid excessive autosize computations
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Path.AutoSizeAxes = Axes.Both;
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Size = Path.Size;
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updatePathSize();
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snakedPosition = Path.PositionInBoundingBox(Vector2.Zero);
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snakedPathOffset = Path.PositionInBoundingBox(Path.Vertices[0]);
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double lastSnakedStart = SnakedStart ?? 0;
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double lastSnakedEnd = SnakedEnd ?? 0;
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SnakedStart = null;
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SnakedEnd = null;
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setRange(lastSnakedStart, lastSnakedEnd);
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}
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public override void RecyclePath()
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{
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base.RecyclePath();
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updatePathSize();
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}
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private void updatePathSize()
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{
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// Force the path to its final size to avoid excessive framebuffer resizes
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Path.AutoSizeAxes = Axes.None;
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Path.Size = Size;
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}
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private void setRange(double p0, double p1)
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{
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if (p0 > p1)
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(p0, p1) = (p1, p0);
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if (SnakedStart == p0 && SnakedEnd == p1) return;
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SnakedStart = p0;
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SnakedEnd = p1;
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drawableSlider.HitObject.Path.GetPathToProgress(CurrentCurve, p0, p1);
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SetVertices(CurrentCurve);
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// The bounding box of the path expands as it snakes, which in turn shifts the position of the path.
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// Depending on the direction of expansion, it may appear as if the path is expanding towards the position of the slider
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// rather than expanding out from the position of the slider.
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// To remove this effect, the path's position is shifted towards its final snaked position
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Path.Position = snakedPosition - Path.PositionInBoundingBox(Vector2.Zero);
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}
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}
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}
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