GGJ_2017/IronToad_UnityProject/Assets/Lighthouse.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

using BansheeGz.BGSpline.Components;
using BansheeGz.BGSpline.Curve;

public class Lighthouse : MonoBehaviour
{
	public BGCurve splineCurve;
	public List<float> splineDistantPoints = new List<float>();
	public float speed = 200f;
	public float timePadding = 0.5f;
	public float timeBetweenPoints = 3f;
	public AnimationCurve animationCurve;

	private BGCcCursor splineCursor;
	private int targetPoint = 0;
	private bool reverseDirection = false;

	void Start()
	{
		splineCursor = splineCurve.GetComponent<BGCcCursor>();

		if (splineDistantPoints == null || splineDistantPoints.Count == 0)
		{
			splineDistantPoints.Add(0f);
			for (int i=1; i<splineCurve.PointsCount; i++)
			{
				BGCurvePointI point = splineCurve.Points[i];
				float distance = 0f;
				Vector3 temp = splineCursor.Math.CalcPositionByClosestPoint(point.PositionWorld, out distance);
				splineDistantPoints.Add(distance);
			}
			splineDistantPoints.Add(splineCursor.Math.GetDistance());
		}
		splineCursor.Distance = 0f;
		moveToNextPoint();
	}

	public void moveToNextPoint()
	{
		LeanTween.delayedCall(gameObject, timeBetweenPoints, ()=>{
			if (reverseDirection)
				targetPoint--;
			else
				targetPoint++;
			if (targetPoint >= splineDistantPoints.Count)
			{
				if (splineCurve.Closed)
				{
					targetPoint = 1;
					splineCursor.Distance = 0f;
				}
				else
				{
					targetPoint = splineDistantPoints.Count - 2;
					reverseDirection = !reverseDirection;
				}
			}

			float start = splineCursor.Distance;
			float end = splineDistantPoints[targetPoint];
			float distance = Mathf.Abs(end - start);
			LeanTween.value(gameObject, start, end, distance / speed + timePadding).setOnUpdate((float val)=>{
				splineCursor.Distance = val;
			}).setEase(animationCurve).setOnComplete(moveToNextPoint);
		});
	}
}