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osu-lazer/osu.Game.Rulesets.Osu/Objects/Drawables/Pieces/SpinnerDisc.cs

156 lines
4.3 KiB
C#

// 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.
using System;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Input.Events;
using osu.Game.Graphics;
using osuTK;
using osuTK.Graphics;
using osu.Framework.Utils;
namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
{
public class SpinnerDisc : CircularContainer, IHasAccentColour
{
private readonly Spinner spinner;
public Color4 AccentColour
{
get => background.AccentColour;
set => background.AccentColour = value;
}
private readonly SpinnerBackground background;
private const float idle_alpha = 0.2f;
private const float tracking_alpha = 0.4f;
public override bool IsPresent => true; // handle input when hidden
public SpinnerDisc(Spinner s)
{
spinner = s;
RelativeSizeAxes = Axes.Both;
Children = new Drawable[]
{
background = new SpinnerBackground { Alpha = idle_alpha },
};
}
public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => true;
private bool tracking;
public bool Tracking
{
get => tracking;
set
{
if (value == tracking) return;
tracking = value;
background.FadeTo(tracking ? tracking_alpha : idle_alpha, 100);
}
}
private bool complete;
public bool Complete
{
get => complete;
set
{
if (value == complete) return;
complete = value;
updateCompleteTick();
}
}
/// <summary>
/// Whether currently in the correct time range to allow spinning.
/// </summary>
private bool isSpinnableTime => spinner.StartTime <= Time.Current && spinner.EndTime > Time.Current;
protected override bool OnMouseMove(MouseMoveEvent e)
{
mousePosition = Parent.ToLocalSpace(e.ScreenSpaceMousePosition);
return base.OnMouseMove(e);
}
private Vector2 mousePosition;
private float lastAngle;
private float currentRotation;
public float RotationAbsolute;
private int completeTick;
private bool updateCompleteTick() => completeTick != (completeTick = (int)(RotationAbsolute / 360));
private bool rotationTransferred;
protected override void Update()
{
base.Update();
var thisAngle = -MathUtils.RadiansToDegrees(MathF.Atan2(mousePosition.X - DrawSize.X / 2, mousePosition.Y - DrawSize.Y / 2));
var delta = thisAngle - lastAngle;
if (tracking)
Rotate(delta);
lastAngle = thisAngle;
if (Complete && updateCompleteTick())
{
background.FinishTransforms(false, nameof(Alpha));
background
.FadeTo(tracking_alpha + 0.2f, 60, Easing.OutExpo)
.Then()
.FadeTo(tracking_alpha, 250, Easing.OutQuint);
}
Rotation = (float)Interpolation.Lerp(Rotation, currentRotation / 2, Math.Clamp(Math.Abs(Time.Elapsed) / 40, 0, 1));
}
/// <summary>
/// Rotate the disc by the provided angle (in addition to any existing rotation).
/// </summary>
/// <remarks>
/// Will be a no-op if not a valid time to spin.
/// </remarks>
/// <param name="angle">The delta angle.</param>
public void Rotate(float angle)
{
if (!isSpinnableTime)
return;
if (!rotationTransferred)
{
currentRotation = Rotation * 2;
rotationTransferred = true;
}
if (angle > 180)
{
lastAngle += 360;
angle -= 360;
}
else if (-angle > 180)
{
lastAngle -= 360;
angle += 360;
}
currentRotation += angle;
RotationAbsolute += Math.Abs(angle) * Math.Sign(Clock.ElapsedFrameTime);
}
}
}