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osu-lazer/osu.Game/Rulesets/UI/Scrolling/Algorithms/ConstantScrollAlgorithm.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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namespace osu.Game.Rulesets.UI.Scrolling.Algorithms
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{
public class ConstantScrollAlgorithm : IScrollAlgorithm
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{
public double GetDisplayStartTime(double time, double timeRange) => time - timeRange;
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public float GetLength(double startTime, double endTime, double timeRange, float scrollLength)
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{
// At the hitobject's end time, the hitobject will be positioned such that its end rests at the origin.
// This results in a negative-position value, and the absolute of it indicates the length of the hitobject.
return -PositionAt(startTime, endTime, timeRange, scrollLength);
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}
public float PositionAt(double time, double currentTime, double timeRange, float scrollLength)
=> (float)((time - currentTime) / timeRange * scrollLength);
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public double TimeAt(float position, double currentTime, double timeRange, float scrollLength)
=> position * timeRange / scrollLength + currentTime;
public void Reset()
{
}
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}
}