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https://github.com/ppy/osu
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6dcd9427ac
This is quite a breaking change, but I think it is beneficial due to the large amount of usage of this class. I originally intended just to remove the allocations of the two delegates handling the `Changed` flow internally, but as nothing was really using the bindables for anything more than a general "point has changed" case, this felt like a better direction.
44 lines
1.4 KiB
C#
44 lines
1.4 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.Linq;
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using osu.Game.Rulesets.Objects.Types;
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using osuTK;
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#nullable enable
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namespace osu.Game.Rulesets.Objects
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{
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public static class SliderPathExtensions
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{
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/// <summary>
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/// Reverse the direction of this path.
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/// </summary>
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/// <param name="sliderPath">The <see cref="SliderPath"/>.</param>
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/// <param name="positionalOffset">The positional offset of the resulting path. It should be added to the start position of this path.</param>
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public static void Reverse(this SliderPath sliderPath, out Vector2 positionalOffset)
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{
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var points = sliderPath.ControlPoints.ToArray();
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positionalOffset = points.Last().Position;
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sliderPath.ControlPoints.Clear();
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PathType? lastType = null;
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for (var i = 0; i < points.Length; i++)
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{
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var p = points[i];
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p.Position -= positionalOffset;
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// propagate types forwards to last null type
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if (i == points.Length - 1)
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p.Type = lastType;
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else if (p.Type != null)
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(p.Type, lastType) = (lastType, p.Type);
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sliderPath.ControlPoints.Insert(0, p);
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}
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}
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}
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}
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