osu-lazer/osu.Game.Modes.Osu/Objects/Slider.cs

// Copyright (c) 2007-2017 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.Beatmaps;
using OpenTK;

namespace osu.Game.Modes.Osu.Objects
{
    public class Slider : OsuHitObject
    {
        public override double EndTime => StartTime + RepeatCount * Curve.Length / Velocity;

        public override Vector2 EndPosition => RepeatCount % 2 == 0 ? Position : Curve.PositionAt(1);

        private int stackHeight;
        public override int StackHeight
        {
            get { return stackHeight; }
            set
            {
                stackHeight = value;
                Curve.Offset = StackOffset;
            }
        }

        public List<Vector2> ControlPoints
        {
            get { return Curve.ControlPoints; }
            set { Curve.ControlPoints = value; }
        }

        public double Length
        {
            get { return Curve.Length; }
            set { Curve.Length = value; }
        }

        public CurveTypes CurveType
        {
            get { return Curve.CurveType; }
            set { Curve.CurveType = value; }
        }

        public double Velocity;

        public override void SetDefaultsFromBeatmap(Beatmap beatmap)
        {
            base.SetDefaultsFromBeatmap(beatmap);

            Velocity = 100 / beatmap.BeatLengthAt(StartTime, true) * beatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier;
        }

        public int RepeatCount = 1;

        internal readonly SliderCurve Curve = new SliderCurve();
    }

    public enum CurveTypes
    {
        Catmull,
        Bezier,
        Linear,
        PerfectCurve
    }
}