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Trilib插件使用

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Trilib插件为Unity3D的付费插件，可实现Unity程序运行状态下，从程序外部动态加载数模。支持FBX, OBJ, GLTF2, STL, PLY, 3MF以及ZIP等文件。

1.安装&编译

  • 下载“TriLib - Model loader package.unitypackage”插件包，并使Unity3D导入插件;
  • 编译运行时报错:TriLibConfigurePlugin.cs报错:没有”BuildTarget.Lumis”值,将其改为”BuildTarget.StandaloneWindows”，即可编译通过;

运行TriLib自带的AssetLoader场景，效果如下:

动态加载FBX效果

2.源码分析

2.1 Sample.cs进行修改

使用assetLoader类之间进行动态加载

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public void LoadFBXClick()
    {
        string fbxPath = @"C:\Users\Administrator\Documents\ABB\J4.FBX";
        using (var assetLoader = new AssetLoader())
        {
            try
            {
                var assetLoaderOptions = AssetLoaderOptions.CreateInstance();
                assetLoaderOptions.RotationAngles = new Vector3(90f, 180f, 0f);
                assetLoaderOptions.AutoPlayAnimations = true;
                assetLoaderOptions.UseOriginalPositionRotationAndScale = true;
                var loadedGameObject = assetLoader.LoadFromFile(fbxPath, assetLoaderOptions);
                loadedGameObject.transform.position = new Vector3(128f, 0f, 0f);
            }
            catch (Exception e)
            {
                Debug.LogError(e.ToString());
            }
        }
    }

通过查看AssetLoaderWindow.cs，发现主要实现AssetLoader类调用

2.2 AssetLoaderWindow.cs中LoadInternal

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/// <summary>
/// Loads a model from the given filename, fibytes or browser files.
/// </summary>
/// <param name="filename">Model filename.</param>
/// <param name="fileBytes">Model file bytes.</param>
/// <param name="browserFilesCount">Browser filcount.</param>
private void LoadInternal(string filename, byte[] fileBytes = null, int browserFilesCount = -1)
{
    PreLoadSetup();
    var assetLoaderOptions = GetAssetLoaderOptions();
    if (!Async)
    {
        using (var assetLoader = new AssetLoader())
        {
            assetLoader.OnMetadataProcessed AssetLoader_OnMetadataProcessed;
            try
            {
                if (fileBytes != null && fileBytes.Length > 0)
                {
                    _rootGameObject = assetLoader.LoadFromMemoryWithTextures(fileBytes, FileUtils.GetFileExtension(filename), assetLoaderOptions, _rootGameObject);
                }else if (!string.IsNullOrEmpty(filename))
                {
                    _rootGameObject = assetLoader.LoadFromFileWithTextures(filename, assetLoaderOptions);
                }else
                {
                    throw new Exception("File not selected");
                }
                CheckForValidModel(assetLoader);
            }catch (Exception exception)
            {
                HandleException(exception);
            }
        }
            FullPostLoadSetup();
    }else
    {
        using (var assetLoader = new AssetLoaderAsync())
        {
            assetLoader.OnMetadataProcessed += AssetLoader_OnMetadataProcessed;
            try{

                if (fileBytes != null && fileBytes.Length > 0)
                {
                    assetLoader.LoadFromMemoryWithTextures(fileBytes, FileUtils.GetFileExtension(filename), assetLoaderOptions, null, delegate (GameObject loadedGameObject)
                    {
                                    CheckForValidModel(assetLoader);
                                    _rootGameObject = loadedGameObject;
                                    FullPostLoadSetup();
                    });
                }else if (!string.IsNullOrEmpty(filename))
                {
                    assetLoader.LoadFromFileWithTextures(filename, assetLoaderOptions, null, delegate (GameObject loadedGameObject)
                    {
                                    CheckForValidModel(assetLoader);
                                    _rootGameObject = loadedGameObject;
                                    FullPostLoadSetup();
                    });
                }else{
                    throw new Exception("File not selected");
                }
            }catch (Exception exception)
            {
                HandleException(exception);
            }
        }
    }
}

2.3 从文件夹一次性加载多个文件

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public void LoadFromBrowserFiles(int filesCount)
{
    LoadInternal(null, null, filesCount);
}

3 修改Sample.cs代码，实现FBX动态加载

通过取消加载的位姿配置操作，可实现FBX模型初始化装配坐标配置

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public List<GameObject> gameObjects = new List<GameObject>();
public GameObject DynamicLoadModel(string fbxPath)
{
    GameObject result = null;
    using (var assetLoader = new AssetLoader())
    {
        try
        {
            var assetLoaderOptions = AssetLoaderOptions.CreateInstance();
            assetLoaderOptions.AutoPlayAnimations = true;
            assetLoaderOptions.UseOriginalPositionRotationAndScale = true;
            var loadedGameObject = assetLoader.LoadFromFile(fbxPath, assetLoaderOptions);
            result = loadedGameObject as GameObject;
        }
        catch (Exception e)
        {
            Debug.LogError(e.ToString());
        }
    }
    return result;
}

public void LoadFBXClick()
{
    string basePath = @"C:\Users\Administrator\Documents\SFB\Resource\ABB\base.FBX";
    string fbxPath1 = @"C:\Users\Administrator\Documents\SFB\Resource\ABB\J1.FBX";
    string fbxPath2 = @"C:\Users\Administrator\Documents\SFB\Resource\ABB\J2.FBX";
    string fbxPath3 = @"C:\Users\Administrator\Documents\SFB\Resource\ABB\J3.FBX";
    string fbxPath4 = @"C:\Users\Administrator\Documents\SFB\Resource\ABB\J4.FBX";
    string fbxPath5 = @"C:\Users\Administrator\Documents\SFB\Resource\ABB\J5.FBX";
    string fbxPath6 = @"C:\Users\Administrator\Documents\SFB\Resource\ABB\J6.FBX";

    gameObjects.Add(this.DynamicLoadModel(basePath));
    gameObjects.Add(this.DynamicLoadModel(fbxPath1));
    gameObjects.Add(this.DynamicLoadModel(fbxPath2));
    gameObjects.Add(this.DynamicLoadModel(fbxPath3));
    gameObjects.Add(this.DynamicLoadModel(fbxPath4));
    gameObjects.Add(this.DynamicLoadModel(fbxPath5));
    gameObjects.Add(this.DynamicLoadModel(fbxPath6));
}

效果

动态加载FBX效果