1、目标

当橡树被砍伐时的落叶粒子效果。

2、创建粒子物体

Hierarchy -> PersistentScene下创建新物体命名为DeciduousLeavesFalling。

添加Particle System组件。

基础配置如下：（暂时勾选Looping实时可以看生成效果，后面反选即可）

配置Emission和Shape信息如下：

配置Color over Lifetime：

配置Size over Lifetime / Rotation over Lifetime / Noise 信息如下：

配置Texture / Renderer 信息如下：

将DeciduousLeavesFalling移到Assets -> Prefabs -> Crop -> Effect下

3、修改Crop.cs脚本

[Tooltip("This should be populated from child transform gameobject showing harvest effect spawn point")]
[SerializeField] private Transform harvestActionEffectTransform = null;

在ProcessToolAction函数中添加：

完整代码为：

public void ProcessToolAction(ItemDetails equippedItemDetails, bool isToolRight, bool isToolLeft, bool isToolDown, bool isToolUp)
{
    // Get grid property details
    GridPropertyDetails gridPropertyDetails = GridPropertiesManager.Instance.GetGridPropertyDetails(cropGridPosition.x, cropGridPosition.y);

    if (gridPropertyDetails == null)
        return;

    // Get seed item details
    ItemDetails seedItemDetails = InventoryManager.Instance.GetItemDetails(gridPropertyDetails.seedItemCode);
    if(seedItemDetails == null) return;

    // Get crop details
    CropDetails cropDetails = GridPropertiesManager.Instance.GetCropDetails(seedItemDetails.itemCode);
    if (cropDetails == null) return;

    // Get animator for crop if present
    Animator animator = GetComponentInChildren<Animator>();

    // Trigger tool animation
    if(animator != null)
    {
        if(isToolRight || isToolUp)
        {
            animator.SetTrigger("usetoolright");
        }
        else if(isToolLeft || isToolDown)
        {
            animator.SetTrigger("usetoolleft");
        }
    }

    // Trigger tool particle effect on crop
    if (cropDetails.isHarvestActionEffect)
    {
        EventHandler.CallHarvestActionEffectEvent(harvestActionEffectTransform.position, cropDetails.harvestActionEffect);
    }


    // Get required harvest actions for tool（收获此农作物所需的操作次数）
    int requiredHarvestActions = cropDetails.RequiredHarvestActionsForTool(equippedItemDetails.itemCode);
    if (requiredHarvestActions == -1) return;

    // Increment harvest action count
    harvestActionCount++;

    // Check if required harvest actions made
    if (harvestActionCount >= requiredHarvestActions)
        HarvestCrop(isToolRight, isToolUp, cropDetails, gridPropertyDetails, animator);

}

4、修改CropTreeCanyonOak预设体

在CropSprite下新增一个物体命名为LeavesSpawnPoint，这个作为特效的参考点，修改其Position（Y）为4。

接着点击CropTreeCanyonOak进行变量赋值。

5、修改PoolManager对象

6、修改VFXManager.cs脚本及配置

添加定义：

 [SerializeField] private GameObject deciduousLeavesFallingPrefab = null;

在displayHarvestActionEffect中添加case信息如下：

case HarvestActionEffect.deciduousLeavesFalling:
    GameObject deciduousLeavesFalling = PoolManager.Instance.ReuseObject(deciduousLeavesFallingPrefab, effectPosition, Quaternion.identity);
    deciduousLeavesFalling.SetActive(true);
    StartCoroutine(DisableHarvestActionEffect(deciduousLeavesFalling, twoSeconds));
    break;

完整的代码如下：

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

public class VFXManager : SingletonMonobehaviour<VFXManager>
{
    private WaitForSeconds twoSeconds;
    [SerializeField] private GameObject reapingPrefab = null;
    [SerializeField] private GameObject deciduousLeavesFallingPrefab = null;


    protected override void Awake()
    {
        base.Awake();

        twoSeconds = new WaitForSeconds(2f);
    }

    private void OnDisable()
    {
        EventHandler.HarvestActionEffectEvent -= displayHarvestActionEffect;
    }

    private void OnEnable()
    {
        EventHandler.HarvestActionEffectEvent += displayHarvestActionEffect;
    }

    private IEnumerator DisableHarvestActionEffect(GameObject effectGameObject, WaitForSeconds secondsToWait)
    {
        yield return secondsToWait;
        effectGameObject.SetActive(false);
    }

    private void displayHarvestActionEffect(Vector3 effectPosition, HarvestActionEffect harvestActionEffect)
    {
        switch(harvestActionEffect)
        {
            case HarvestActionEffect.deciduousLeavesFalling:
                GameObject deciduousLeavesFalling = PoolManager.Instance.ReuseObject(deciduousLeavesFallingPrefab, effectPosition, Quaternion.identity);
                deciduousLeavesFalling.SetActive(true);
                StartCoroutine(DisableHarvestActionEffect(deciduousLeavesFalling, twoSeconds));
                break;

            case HarvestActionEffect.reaping:
                GameObject reaping = PoolManager.Instance.ReuseObject(reapingPrefab, effectPosition, Quaternion.identity);
                reaping.SetActive(true); 
                StartCoroutine(DisableHarvestActionEffect(reaping, twoSeconds));
                break;

            case HarvestActionEffect.none:
                break;

            default:
                break;
        }
    }
}

配置VFXManager的信息如下：

7、运行游戏