基础内容

必要插件安装
缓动曲线和动画基础
ElementFolder，Track与其次级模块，PathNode重构

Assets/Scripts/Base/GeneralSubmodules/TimeDurationSubmodule.cs

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+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using Unity.Mathematics;
+using UnityEngine;
+
+namespace Ichni.RhythmGame
+{
+    public class TimeDurationSubmodule: SubmoduleBase
+    {
+        public float startTime, endTime; //起止时间
+        
+        public TimeDurationSubmodule()
+        {
+            startTime = 0;
+            endTime = 0;
+        }
+        
+        public TimeDurationSubmodule(float startTime, float endTime)
+        {
+            this.startTime = startTime;
+            this.endTime = endTime;
+        }
+        
+        public bool CheckTimeInDuration(float time, float offset = 0.2f)
+        {
+            return time >= startTime - offset && time <= endTime + offset;
+        }
+
+        public void SetDurationFromChildren(List<TimeDurationSubmodule> children)
+        {
+            List<float2> durations = new List<float2>();
+
+            if (children.Count == 0)
+            {
+                return;
+            }
+
+            foreach (var child in children)
+            {
+                durations.Add(new float2(child.startTime, child.endTime));
+            }
+
+            startTime = durations.Min(duration => duration.x);
+            endTime = durations.Max(duration => duration.y);
+        }
+    }
+}