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我正在尝试在 Ubuntu 上使用MasterQ32 的 OpenWorld.Engine 。我遵循了“文档”中的示例场景。一切都运行良好，除了资产导入。有趣的是，同样的错误也发生在 Windows 7 上：Assimp.NET's library loader can't find kernel32.dll. 下面是堆栈跟踪：

Unhandled Exception:
System.DllNotFoundException: kernel32
  at (wrapper managed-to-native) Assimp.Unmanaged.NativeMethods:LoadLibrary (string)
  at Assimp.Unmanaged.AssimpLibraryImplementation.LoadLibrary (System.String path) [0x00000] in <filename unknown>:0 
  at Assimp.Unmanaged.AssimpLibrary.LoadLibrary (System.String libPath) [0x00000] in <filename unknown>:0 
  at Assimp.Unmanaged.AssimpLibrary.LoadLibrary (System.String lib32Path, System.String lib64Path) [0x00000] in <filename unknown>:0 
  at Assimp.Unmanaged.AssimpLibrary.LoadLibrary () [0x00000] in <filename unknown>:0 
  at Assimp.Unmanaged.AssimpLibrary.LoadIfNotLoaded () [0x00000] in <filename unknown>:0 
  at Assimp.Unmanaged.AssimpLibrary.EnableVerboseLogging (Boolean enable) [0x00000] in <filename unknown>:0 
  at Assimp.AssimpImporter.PrepareImport () [0x00000] in <filename unknown>:0 
  at Assimp.AssimpImporter.ImportFileFromStream (System.IO.Stream stream, PostProcessSteps postProcessFlags, System.String formatHint) [0x00000] in <filename unknown>:0 
  at OpenWorld.Engine.Model.Load (OpenWorld.Engine.AssetLoadContext context, System.IO.Stream stream, System.String extensionHint) [0x00000] in <filename unknown>:0 
  at OpenWorld.Engine.Asset+<Load>c__AnonStorey0`1[OpenWorld.Engine.Model].<>m__0 () [0x00000] in <filename unknown>:0 
  at OpenWorld.Engine.Game.DeferRoutines () [0x00000] in <filename unknown>:0 
  at System.Threading.Thread.StartInternal () [0x00000] in <filename unknown>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.DllNotFoundException: kernel32
  at (wrapper managed-to-native) Assimp.Unmanaged.NativeMethods:LoadLibrary (string)
  at Assimp.Unmanaged.AssimpLibraryImplementation.LoadLibrary (System.String path) [0x00000] in <filename unknown>:0 
  at Assimp.Unmanaged.AssimpLibrary.LoadLibrary (System.String libPath) [0x00000] in <filename unknown>:0 
  at Assimp.Unmanaged.AssimpLibrary.LoadLibrary (System.String lib32Path, System.String lib64Path) [0x00000] in <filename unknown>:0 
  at Assimp.Unmanaged.AssimpLibrary.LoadLibrary () [0x00000] in <filename unknown>:0 
  at Assimp.Unmanaged.AssimpLibrary.LoadIfNotLoaded () [0x00000] in <filename unknown>:0 
  at Assimp.Unmanaged.AssimpLibrary.EnableVerboseLogging (Boolean enable) [0x00000] in <filename unknown>:0 
  at Assimp.AssimpImporter.PrepareImport () [0x00000] in <filename unknown>:0 
  at Assimp.AssimpImporter.ImportFileFromStream (System.IO.Stream stream, PostProcessSteps postProcessFlags, System.String formatHint) [0x00000] in <filename unknown>:0 
  at OpenWorld.Engine.Model.Load (OpenWorld.Engine.AssetLoadContext context, System.IO.Stream stream, System.String extensionHint) [0x00000] in <filename unknown>:0 
  at OpenWorld.Engine.Asset+<Load>c__AnonStorey0`1[OpenWorld.Engine.Model].<>m__0 () [0x00000] in <filename unknown>:0 
  at OpenWorld.Engine.Game.DeferRoutines () [0x00000] in <filename unknown>:0 
  at System.Threading.Thread.StartInternal () [0x00000] in <filename unknown>:0

这是我正在使用的代码，与文档中的代码基本相同：使用相机和单个对象设置场景。我正在使用存储库中提供的资产，并且我验证了资产路径是正确的。

using System;
using System.IO;
using OpenWorld.Engine;
using System.Drawing;
using OpenTK.Graphics;
using OpenWorld.Engine.SceneManagement;
using OpenTK;

namespace OpenWorldLearn {

    public class TestGame : Game {
        Scene scene;
        PerspectiveLookAtCamera camera;

        protected override PresentationParameters GetPresentationParameters() {
            var def = base.GetPresentationParameters();
            def.GraphicsMode = new GraphicsMode(24, 24, 0, 0);
            def.Resolution = new Size(800, 600); 
            def.IsFullscreen = false;
            def.Title = "Potato!";
            return def;
        }

        protected override void OnLoad() {
            FrameBuffer.ClearColor = OpenWorld.Engine.Color.CornflowerBlue;

            Assets.Sources.Add(new FileSystemAssetSource("../../../Assets"));

            camera = new PerspectiveLookAtCamera();
            camera.FieldOfView = 90;
            camera.LookAt(new Vector3(-0.1f, 1.9f, -4f), Vector3.Zero);

            scene = new Scene();

            SceneNode child = new SceneNode();
            var renderer = child.Components.Add<Renderer>();
            renderer.Model = Assets.Load<Model>("crate");
            scene.Root.Children.Add(child);
        }

        protected override void OnUpdate(GameTime time) {
            scene.Update(time);
        }

        protected override void OnDrawPostState(GameTime time) {
            FrameBuffer.Clear();
            scene.Draw(this.camera, time);
        }
    }
}
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1 回答 1

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我想我已经弄清楚发生了什么 - 它正在寻找一个名为Assimp32.so/Assimp64.so在LD_LIBRARY_PATHP/Invoking中的文件，dlopen但这将始终返回IntPtr.Zero，因为它确实被调用libassimp.so并且/usr/lib/libassimp.so如果您安装libassimp-dev在 32 位 ubuntu 14.04 上可以找到。（注意，您是否为您的平台安装了 assimp 本机标头？）

另外，如果是我，我会重构它以信任 CLR 自己使用标准 P/Invoke 执行// dlopen，而不是通过直接 pinvokes 将其手动处理到操作系统 API 中。然后，您将有效地将 const 函数名称替换为用. OTOH 我能想到的一个合法的地方是DarkJava，其中函数名称在编译时实际上是未知的。dlsymdlcloseAssimpFunctionNamesDllImportAttribute

于 2015-02-15T20:57:12.810 回答