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55 lines
2.8 KiB
C#
55 lines
2.8 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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namespace osu.Game.Rulesets.UI.Scrolling.Algorithms
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{
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public interface IScrollAlgorithm
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{
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/// <summary>
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/// Given a point in time, computes the time at which it enters the time range.
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/// </summary>
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/// <remarks>
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/// E.g. For a constant time range of 5000ms, the time at which t=7000ms enters the time range is 2000ms.
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/// </remarks>
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/// <param name="time">The point in time.</param>
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/// <param name="timeRange">The amount of visible time.</param>
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/// <returns>The time at which <paramref name="time"/> enters <see cref="timeRange"/>.</returns>
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double GetDisplayStartTime(double time, double timeRange);
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/// <summary>
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/// Computes the spatial length within a start and end time.
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/// </summary>
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/// <param name="startTime">The start time.</param>
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/// <param name="endTime">The end time.</param>
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/// <param name="timeRange">The amount of visible time.</param>
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/// <param name="scrollLength">The absolute spatial length through <see cref="timeRange"/>.</param>
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/// <returns>The absolute spatial length.</returns>
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float GetLength(double startTime, double endTime, double timeRange, float scrollLength);
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/// <summary>
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/// Given the current time, computes the spatial position of a point in time.
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/// </summary>
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/// <param name="time">The time to compute the spatial position of.</param>
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/// <param name="currentTime">The current time.</param>
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/// <param name="timeRange">The amount of visible time.</param>
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/// <param name="scrollLength">The absolute spatial length through <see cref="timeRange"/>.</param>
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/// <returns>The absolute spatial position.</returns>
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float PositionAt(double time, double currentTime, double timeRange, float scrollLength);
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/// <summary>
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/// Computes the time which brings a point to a provided spatial position given the current time.
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/// </summary>
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/// <param name="position">The absolute spatial position.</param>
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/// <param name="currentTime">The current time.</param>
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/// <param name="timeRange">The amount of visible time.</param>
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/// <param name="scrollLength">The absolute spatial length through <see cref="timeRange"/>.</param>
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/// <returns>The time at which <see cref="PositionAt(t)"/> == <paramref name="position"/>.</returns>
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double TimeAt(float position, double currentTime, double timeRange, float scrollLength);
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/// <summary>
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/// Resets this <see cref="IScrollAlgorithm"/> to a default state.
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/// </summary>
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void Reset();
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}
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}
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