C#:指向结构内部结构的指针

Question

我正在尝试在 C# 中使用编码。在 C++ 中，我有一个这样的结构:

struct aiScene
{
    unsigned int mFlags;
    C_STRUCT aiNode* mRootNode;
    unsigned int mNumMeshes;
    C_STRUCT aiMesh** mMeshes;
    unsigned int mNumMaterials;
    C_STRUCT aiMaterial** mMaterials;
    unsigned int mNumAnimations; 
    C_STRUCT aiAnimation** mAnimations;
    unsigned int mNumTextures;
    C_STRUCT aiTexture** mTextures;
    unsigned int mNumLights;
    C_STRUCT aiLight** mLights;
    unsigned int mNumCameras;
    C_STRUCT aiCamera** mCameras;
}

因此，C# 等效项是:

[StructLayout(LayoutKind.Sequential)]
public struct aiScene
{
    public uint mFlags;
    public unsafe aiNode* mRootNode;
    public uint mNumMeshes;
    public unsafe aiMesh** mMeshes;
    public uint mNumMaterials;
    public unsafe aiMaterial** mMaterials;
    public uint mNumAnimations;
    public unsafe aiAnimation** mAnimations;
    public uint mNumTextures;
    public unsafe aiTexture** mTextures;
    public uint mNumLights;
    public unsafe aiLight** mLights;
    public uint mNumCameras;
    public unsafe aiCamera** mCameras;
}

但是这个结构上的很多东西都是托管的(aiNode、aiMesh、aiLight)等等。所以，我有这个错误:

Cannot take the address of, get the size of, or declare a pointer to a managed type ('Assimp.aiNode')

关于如何解决这个问题有什么想法吗？

Answer 1

这可能会变得非常复杂，具体取决于您要执行的操作。但是，在您工作时，它可以帮助您像这样在 C# 代码中声明每个指针。它使用 very useful IntPtr, which was described on here earlier today . :)

请注意，这不会神奇地让您的代码正常工作。在我可以就此向您提供意见之前，我需要了解更多正在发生的事情。

public struct aiScene
{
    public uint Flags;
    public IntPtr RootNode;
    ...
}