Assimp不加载从blender中导出的obj文件的层次结构

#include <assimp/Importer.hpp>
#include <assimp/scene.h>
#include <assimp/postprocess.h>

int main() {
    Assimp::Importer importer;
    const aiScene* scene = importer.ReadFile("path_to_your_model.obj", 
        aiProcess_Triangulate | 
        aiProcess_FlipUVs | 
        aiProcess_GenNormals | 
        aiProcess_CalcTangentSpace);

    if (!scene || scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE || !scene->mRootNode) {
        std::cerr << "ERROR::ASSIMP::" << importer.GetErrorString() << std::endl;
        return -1;
    }

    // 遍历层次结构
    processNode(scene->mRootNode, scene);

    return 0;
}

void processNode(aiNode* node, const aiScene* scene) {
    // 处理节点...
    for (unsigned int i = 0; i < node->mNumMeshes; i++) {
        aiMesh* mesh = scene->mMeshes[node->mMeshes[i]];
        processMesh(mesh, scene);
    }

    // 递归处理子节点
    for (unsigned int i = 0; i < node->mNumChildren; i++) {
        processNode(node->mChildren[i], scene);
    }
}

void processMesh(aiMesh* mesh, const aiScene* scene) {
    // 处理网格...
}