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Src/Core/Tween/BITween.cs

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+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using Cysharp.Threading.Tasks;
+using Unity.Mathematics;
+
+namespace BITKit.Tween
+{
+
+	public static class BITween
+	{
+		public class TweenSequence
+		{
+			internal TweenSequence(){}
+			private readonly List<UniTask> tasks = new();
+			public TweenSequence Append(UniTask task)
+			{
+				tasks.Add(task);
+				return this;
+			}
+	
+			public async UniTask Play(CancellationToken cancellationToken=default)
+			{
+				foreach (var task in tasks)
+				{
+					await task;
+					if (cancellationToken.IsCancellationRequested) return;
+				}
+			}
+		}
+		public static TweenSequence CreateSequence()
+		{
+			return new TweenSequence();
+		}
+
+		public static async UniTask MoveToForward(
+			Action<float> setter,
+			float from,
+			float to,
+			float duration = 1,
+			CancellationToken cancellationToken = default
+		)
+		{
+			var t = 0f;
+			var delta = 1 / duration;
+			setter(from);
+			//BIT4Log.Log<TweenSequence>($"已创建Tween,from:[{from}]to:[{to}]duration:[{duration}]delta:[{delta}]");
+			while (t < 1 && cancellationToken.IsCancellationRequested is false)
+			{
+				t = math.clamp(t + delta*BITApp.Time.DeltaTime, 0, 1);
+				var next = math.lerp(from, to, t);
+				//BIT4Log.Log<TweenSequence>($"当前进度:[{t}]next:[{next}]");
+
+#if UNITY_64
+				await UniTask.NextFrame(cancellationToken);
+				await UniTask.SwitchToMainThread(cancellationToken);
+#else
+					await UniTask.Yield();
+#endif
+				setter(next);
+			}
+			if (cancellationToken.IsCancellationRequested is false)
+				setter(to);
+		}
+	}
+}