去年某項(xiàng)目需要從后端服務(wù)器上加載FBX模型，但是整個項(xiàng)目中只有很少的地方需要用到動態(tài)模型替換，并且項(xiàng)目交付后需要外行人員也能輕松上手更換需要動態(tài)加載的模型，所以需要實(shí)現(xiàn)一個簡單的模型打包和動態(tài)模型加載功能。

FBX模型打包為.assetbundle文件

1.創(chuàng)建一個新的腳本，編寫如下代碼

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

public class ExportAssetBundles : MonoBehaviour
{
    //在Unity編輯器中添加菜單
    [MenuItem("AssetBundle / 打包選中的文件")]
    static void Export()
    {
        // 打開保存面板，獲得用戶選擇的路徑
        string path = EditorUtility.SaveFilePanel("保存文件", "", "模型", "assetbundle");
        if (path.Length != 0)
        {
            // 選擇的要保存的對象  
            Object[] selection = Selection.GetFiltered(typeof(Object), SelectionMode.DeepAssets);
            //打包 成AssetBundle
            BuildPipeline.BuildAssetBundle(Selection.activeObject, selection, path, BuildAssetBundleOptions.CollectDependencies | BuildAssetBundleOptions.CompleteAssets, BuildTarget.StandaloneWindows);
        }
    }
}

2.回到unity中，左上角工具欄出現(xiàn)AssetBundle，點(diǎn)擊AssetBundle，然后選中你需要打包的FBX模型文件，點(diǎn)擊“打包選中文件”，選擇保存路徑即可。(需要注意的是，模型文件的名稱應(yīng)與上圖代碼中13行的第三個參數(shù)相同)

3.打包FBX模型之后將其放入能夠訪問并下載的服務(wù)器

FBX模型在線替換的具體實(shí)現(xiàn)

1.在需要加載模型的地方編寫如下代碼(代碼中第13行為服務(wù)器上準(zhǔn)備好的.assetbundle文件)

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEngine.Networking;

public class GameManager : MonoBehaviour
{
    private void Start()
    {
        Screen.SetResolution(3840, 2160, false);
        StartCoroutine(LoadModel2("http://localhost//模型.assetbundle"));
    }
    IEnumerator LoadModel2(string url)
    {
        var uwr = UnityWebRequestAssetBundle.GetAssetBundle(url);
        yield return uwr.SendWebRequest();
        // Get an asset from the bundle and instantiate it.
        AssetBundle bundle = DownloadHandlerAssetBundle.GetContent(uwr);
        var loadAsset = bundle.LoadAssetAsync<GameObject>("Assets/Art/Model/模型.FBX");
        yield return loadAsset;
        Instantiate(loadAsset.asset,transform);
        var mx = transform.Find("模型(Clone)");
        mx.transform.localPosition = new Vector3(0,0,0);
        mx.transform.localEulerAngles = Vector3.zero;
    }
}

2.運(yùn)行上面代碼即可實(shí)現(xiàn)動態(tài)加載FBX模型(請注意在打包項(xiàng)目之前應(yīng)先將第一步的代碼注釋，否則將打包失敗)文章來源地址http://www.zghlxwxcb.cn/news/detail-509768.html