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osu-lazer/osu.Game/Rulesets/UI/Scrolling/Visualisers/ISpeedChangeVisualiser.cs
2018-04-13 18:26:38 +09:00

34 lines
2.0 KiB
C#

// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System.Collections.Generic;
using osu.Game.Rulesets.Objects.Drawables;
using OpenTK;
namespace osu.Game.Rulesets.UI.Scrolling.Visualisers
{
public interface ISpeedChangeVisualiser
{
/// <summary>
/// Computes the states of <see cref="DrawableHitObject"/>s that are constant, such as lifetime and spatial length.
/// This is invoked once whenever <paramref name="timeRange"/> or <paramref name="length"/> changes.
/// </summary>
/// <param name="hitObjects">The <see cref="DrawableHitObject"/>s whose states should be computed.</param>
/// <param name="direction">The scrolling direction.</param>
/// <param name="timeRange">The duration required to scroll through one length of the screen before any control point adjustments.</param>
/// <param name="length">The length of the screen that is scrolled through.</param>
void ComputeInitialStates(IEnumerable<DrawableHitObject> hitObjects, ScrollingDirection direction, double timeRange, Vector2 length);
/// <summary>
/// Computes the states of <see cref="DrawableHitObject"/>s that change depending on <paramref name="currentTime"/>, such as position.
/// This is invoked once per frame.
/// </summary>
/// <param name="hitObjects">The <see cref="DrawableHitObject"/>s whose states should be computed.</param>
/// <param name="direction">The scrolling direction.</param>
/// <param name="currentTime">The current time.</param>
/// <param name="timeRange">The duration required to scroll through one length of the screen before any control point adjustments.</param>
/// <param name="length">The length of the screen that is scrolled through.</param>
void ComputePositions(IEnumerable<DrawableHitObject> hitObjects, ScrollingDirection direction, double currentTime, double timeRange, Vector2 length);
}
}