开源项目工具：LeanTween - 为Unity 3D打造的高效缓动引擎详解(比较麻烦的API版)——实现物体抛物线移动

为了让LeanTween更具有灵活性，LeanTween开放了一个API:

LeanTween.value(gameObject,回调函数，起始数值，终点数值，时间)

API中的数值，可以是float,vector3,vector2,color等类型

所以可以用回调函数做很多事情，比如可以同时对物体的大小和位置进行调整。

以下直接上代码，实现物体的抛物线运动：

using System;
using System.Collections;
using System.Collections.Generic;
using System.Security.Cryptography;
using UnityEngine;
using UnityEngine.UI;

public class 测试抛物线 : MonoBehaviour
{
    [Header("目标点")]
    public GameObject target;
    [Header("开始按钮")]
    public Button btn_begin;
    [Header("暂停按钮")]
    public Button btn_end;
    [Header("恢复按钮")]
    public Button btn_resume;
    [Header("重置按钮")]
    public Button btn_restore;
    [Header("LeanTwee唯一ID")]
    public int _id;
    [Header("抛物线高度")]
    public float parabolaHeight;

    private Vector3 oriPos;//起始坐标
    // Start is called before the first frame update
    void Start()
    {
        oriPos = transform.position;
        btn_begin.onClick.AddListener(() => {
            Action<Vector3> updatePos = UpdatePos;
            _id =  LeanTween.value(gameObject, updatePos, transform.position, target.transform.position, 5f).id;
        });
        btn_end.onClick.AddListener(() => {
            LeanTween.pause(_id);
        });

        btn_resume.onClick.AddListener(() => {
            LeanTween.resume(_id);
        });

        btn_restore.onClick.AddListener(() => {
            transform.position = oriPos;
        });
    }

    private void UpdatePos(Vector3 pos)
    {
        float ratio = Vector3.Distance(pos, oriPos) / Vector3.Distance(target.transform.position, oriPos);
        Vector3 currentPos = pos;
        currentPos.y += Mathf.Sin(ratio * Mathf.PI) * parabolaHeight;
        transform.position = currentPos;
    }
}

代码很简单！

PS：

注意：

如果同时加添加多种动画，比如：

        LeanTween.value(gameObject, UpdatePosCall, transform.position, target.transform.position, 5f)
            .setOnUpdate(OnOtherThing)
            .setEase(LeanTweenType.easeInElastic).setLoopClamp(1);

这时候如果用setOnUpdate控制动画细节可能会出现问题，所以这时候最好将动画细节控制放到回调函数UpdatePosCall中，大家可以多试试，交流