osu-lazer/osu.Game.Rulesets.Catch/Beatmaps/CatchBeatmapConverter.cs

// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE

using osu.Game.Beatmaps;
using osu.Game.Rulesets.Catch.Objects;
using System.Collections.Generic;
using System;
using osu.Game.Rulesets.Catch.UI;
using osu.Game.Rulesets.Objects.Types;
using osu.Game.Rulesets.Objects;

namespace osu.Game.Rulesets.Catch.Beatmaps
{
    public class CatchBeatmapConverter : BeatmapConverter<CatchHitObject>
    {
        public CatchBeatmapConverter(IBeatmap beatmap)
            : base(beatmap)
        {
        }

        protected override IEnumerable<Type> ValidConversionTypes { get; } = new[] { typeof(IHasXPosition) };

        protected override IEnumerable<CatchHitObject> ConvertHitObject(HitObject obj, IBeatmap beatmap)
        {
            var curveData = obj as IHasCurve;
            var positionData = obj as IHasXPosition;
            var comboData = obj as IHasCombo;
            var endTime = obj as IHasEndTime;

            if (positionData == null)
            {
                if (endTime != null)
                {
                    yield return new BananaShower
                    {
                        StartTime = obj.StartTime,
                        Samples = obj.Samples,
                        Duration = endTime.Duration,
                        NewCombo = comboData?.NewCombo ?? false
                    };
                }

                yield break;
            }

            if (curveData != null)
            {
                yield return new JuiceStream
                {
                    StartTime = obj.StartTime,
                    Samples = obj.Samples,
                    ControlPoints = curveData.ControlPoints,
                    CurveType = curveData.CurveType,
                    Distance = curveData.Distance,
                    RepeatSamples = curveData.RepeatSamples,
                    RepeatCount = curveData.RepeatCount,
                    X = positionData.X / CatchPlayfield.BASE_WIDTH,
                    NewCombo = comboData?.NewCombo ?? false
                };

                yield break;
            }

            yield return new Fruit
            {
                StartTime = obj.StartTime,
                Samples = obj.Samples,
                NewCombo = comboData?.NewCombo ?? false,
                X = positionData.X / CatchPlayfield.BASE_WIDTH
            };
        }

        protected override Beatmap<CatchHitObject> CreateBeatmap() => new CatchBeatmap();
    }
}