mirror of https://github.com/ppy/osu
119 lines
3.9 KiB
C#
119 lines
3.9 KiB
C#
// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
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// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
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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.Configuration;
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using osu.Game.Rulesets.Objects.Types;
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using osuTK;
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namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
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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 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 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 readonly Slider slider;
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public SnakingSliderBody(Slider slider)
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{
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this.slider = slider;
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}
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[BackgroundDependencyLoader]
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private void load()
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{
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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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var span = slider.SpanAt(completionProgress);
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var spanProgress = slider.ProgressAt(completionProgress);
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double start = 0;
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double end = SnakingIn ? MathHelper.Clamp((Time.Current - (slider.StartTime - slider.TimePreempt)) / slider.TimeFadeIn, 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 ? spanProgress : 1;
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}
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else
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{
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start = SnakingOut ? 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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// Generate the entire curve
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slider.Path.GetPathToProgress(CurrentCurve, 0, 1);
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SetVertices(CurrentCurve);
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// The body is sized to the full path size to avoid excessive autosize computations
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Size = Path.Size;
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snakedPosition = Path.PositionInBoundingBox(Vector2.Zero);
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snakedPathOffset = Path.PositionInBoundingBox(Path.Vertices[0]);
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var lastSnakedStart = SnakedStart ?? 0;
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var 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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private void setRange(double p0, double p1)
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{
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if (p0 > p1)
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MathHelper.Swap(ref p0, ref p1);
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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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slider.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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