Touhou/client/Assets/Game/Scripts/ECS/System/TimelineSystem.cs

using Entitas;
using UnityEngine;
using Game;

public class TimelineSystem : IExecuteSystem, IInitializeSystem
{
    private IGroup<GameEntity> _entities;

    public void Initialize()
    {
        _entities = Util.GetGroup(GameMatcher.Timeline);
    }

    public void Execute()
    {
        foreach (var entity in _entities)
        {
            var timeline = entity.timeline;
            if (timeline.IsPause)
                continue;
            if (!timeline.IsRunning)
                continue;
            UpdateCheckEnd(entity);
            if (!timeline.IsRunning)
                continue;
            UpdateTimeline(timeline);
        }
    }

    private static void UpdateCheckEnd(GameEntity entity)
    {
        var timeline = entity.timeline;
        timeline.TimePast += Time.deltaTime;
        if (timeline.TimePast >= timeline.TimeMax)
        {
            Util.EndSkillTimeline(entity);
        }
    }

    private static void UpdateTimeline(TimelineComponent timeline)
    {
        foreach (var clip in timeline.Timeline.Clips)
        {
            var clipReal = clip.Clip;
            var t = timeline.TimePast;
            var t1 = clipReal.StartTime;
            var t2 = clipReal.EndTime;

            //没有到激活时间的
            if (t < t1) continue;
            //已经执行完毕的
            if (clipReal.HasRun) continue;

            if (t >= t2)
            {
                //超过结束时间的
                if (clipReal.IsAlive)
                {
                    //从激活状态退出的
                    clipReal.OnLeave();
                    clipReal.IsAlive = false;
                }
                else
                {
                    //没有激活过 直接退出的
                    clipReal.OnEnter();
                    clipReal.OnStay();
                    clipReal.OnLeave();
                }

                clipReal.HasRun = true;
            }
            else
            {
                //case2 到激活时间、未到结束时间的
                if (!clipReal.IsAlive)
                {
                    clipReal.OnEnter();
                    clipReal.IsAlive = true;
                }

                clipReal.OnStay();
            }
        }
    }
}