U3D物品掉落表现

一般在游戏中都会需要有物品掉落的表现,今天就编写了一个通用的模拟原地抛物线的脚本,适用于物品在怪物身上掉落时的表现。

using UnityEngine;
using System.Collections;

public class Drop : MonoBehaviour
{
    public GameObject go;
    private float _a = 0.0f;
    private float _b = 0.0f;
    public float jumpDuration = 3f; //弹起的时间
    public float height = 50; //弹起的高度
    private float _curTime = 0.0f;
    public int count = 3; //弹起的次数
    private Vector3 _homePos = Vector3.zero;
    private Vector3 _tempPos = Vector3.zero;
    void Start()
    {
        _homePos = go.transform.position;
        CalculateAAndB();
    }

    private void CalculateAAndB()
    {
        _a = -4 * height / Mathf.Pow(jumpDuration, 2);
        _b = _a * (-1) * jumpDuration;
    }

    // Update is called once per frame
    void Update()
    {
        if (gameObject)
        {
            if (_curTime < jumpDuration)
            {
                _curTime += Time.deltaTime;
                _tempPos = _homePos + (_a * Mathf.Pow(_curTime, 2) + _b * _curTime) * Vector3.up;
                go.transform.position = _tempPos;
            }
            else if (count > 0)
            {
                count = count - 1;
                _curTime = 0;
                height = 0.5f * height;
                jumpDuration = 0.5f * jumpDuration;
                CalculateAAndB();
            }
        }
    }
}