【Unity】オブジェクトの移動パターンをBGCurveで作ってタイムラインで制御してみる【Timeline】

using System;
using System.Linq;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Playables;

[Serializable]
public class CurveRange
{
	[Range(0, 1)]
	public float begin = 0;
	[Range(0, 1)]
	public float end = 1;
} // class CurveRange

public class PathPlayableAsset : PlayableAsset
{
	[SerializeField]
	private ExposedReference<BansheeGz.BGSpline.Components.BGCcMath> Curve;

	[SerializeField]
	private CurveRange range;

	//----------------------------------------------------------------------------
	public override Playable CreatePlayable( PlayableGraph graph, GameObject owner)
	{
		var behaviour = new PathPlayableBehaviour();
		behaviour.Curve = Curve.Resolve( graph.GetResolver());
		behaviour.begin = range.begin;
		behaviour.end = range.end;
		behaviour.owner = owner;
		return ScriptPlayable<PathPlayableBehaviour>.Create( graph, behaviour);
	}
} // class PathPlayableAsset

using System;
using System.Linq;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Playables;

public class PathPlayableBehaviour : PlayableBehaviour
{
	public BansheeGz.BGSpline.Components.BGCcMath Curve{ get; set; }
	public GameObject owner{ get; set; }
	public float begin{ get; set; }
	public float end{ get; set; }

	private float oldRatio = -1;
	//----------------------------------------------------------------------------
	// PlayState.Pausedに変更されたときに呼び出される
	public override void OnBehaviourPause(
		UnityEngine.Playables.Playable playable,
		UnityEngine.Playables.FrameData info
	)
	{
	}
	//----------------------------------------------------------------------------
	// PlayState.Playingに変更されたときに呼び出される
	public override void OnBehaviourPlay(
		UnityEngine.Playables.Playable playable,
		UnityEngine.Playables.FrameData info
	)
	{
		oldRatio = -1;
	}
	//----------------------------------------------------------------------------
	// PlayableGraphのProcessFrameフェーズの間に呼び出される
	// ProcessFrameはあなたのPlayableがその仕事をする段階です。
	// PlayableがPlayPlayableOutputを直接または間接的に再生して接続するときに、各フレームに対して呼び出されます。
	public override void ProcessFrame(
		UnityEngine.Playables.Playable playable,
		UnityEngine.Playables.FrameData info,
		object playerData
	)
	{
		if( owner == null) return;
		if( Curve == null) return;
		var duration = UnityEngine.Playables.PlayableExtensions.GetDuration( playable); // クリップの長さ
		var localTime = UnityEngine.Playables.PlayableExtensions.GetPreviousTime( playable); // 現在の時間
		float ratio = (float)( localTime / duration);
		if( oldRatio >= 0 && oldRatio < ratio)
		{
			float rangeDist = end - begin;

			var oldPos = Curve.CalcPositionByDistanceRatio( begin + rangeDist * oldRatio );
			var nowPos = Curve.CalcPositionByDistanceRatio( begin + rangeDist * ratio );
			oldRatio = ratio;
			var diff = nowPos - oldPos;
			owner.transform.position += diff;
		}
		oldRatio = ratio;
	}
} // class PathPlayableBehaviour