如何访问Assimp模型数据以进行碰撞

这似乎是一个简单的任务，但是我似乎无法弄清楚如何使用Assimp中导入的数据来测试三角碰撞。我已经确定我的三角碰撞算法效果很好，并将顶点和索引缓冲到OpenGL EBO和VBO中，以使绘图完美地工作。我被认为是我从std :: vector中访问数据和索引向量不正确的方式的方式。目前，我正在使用这些指示为顶点向量的索引。

 void loadModel(std::string path) {
        Assimp::Importer importer;
        const aiScene * scene = importer.ReadFile(path, aiProcess_Triangulate | aiProcess_FlipUVs | aiProcess_JoinIdenticalVertices);
        if (!scene || scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE || !scene->mRootNode) {
            printf_s("Assimp loading error n%sn", importer.GetErrorString());
            return;
        }
        directory = path.substr(0, path.find_last_of('/'));
        processNode(scene->mRootNode, scene);
    }
    void processNode(aiNode * node, const aiScene * scene) {
        for (unsigned int i = 0; i < node->mNumMeshes; i++) {
            //processes all the nodes meshes
            aiMesh * mesh = scene->mMeshes[node->mMeshes[i]];
            meshes.push_back(processMesh(mesh, scene));
        }
        for (unsigned int i = 0; i < node->mNumChildren; i++) {
            processNode(node->mChildren[i], scene);
        }
    }
    Mesh processMesh(aiMesh * mesh, const aiScene * scene) {
        std::vector<Vertex> vertices;
        std::vector<unsigned int> indices;
        std::vector<Texture> textures;
        for (unsigned int i = 0; i < mesh->mNumVertices; i++)  {
            Vertex vertex;
            glm::vec3 vector;
            vector.x = mesh->mVertices[i].x;
            vector.y = mesh->mVertices[i].y;
            vector.z = mesh->mVertices[i].z;
            vertex.position = vector;
            //get other vertex information
            vertices.push_back(vertex);
            //for all vertices in the mesh, adds the data to a vector
        }
        for (unsigned int i = 0; i < mesh->mNumFaces; i++) {
            aiFace face = mesh->mFaces[i];
            if (face.mNumIndices == 3) {
                indices.push_back(face.mIndices[0]);                    
                indices.push_back(face.mIndices[1]);
                indices.push_back(face.mIndices[2]);
                //for all the indices in each face, add each indice
            }
            else {
                printf("Odd mNumIndices n");
                //added as a just in case - but in my situation this case is never executed -> all faces are triangles
                for (unsigned int j = 0; j < face.mNumIndices; j++) {
                    indices.push_back(face.mIndices[j]);
                }
            }
        }

现在，要访问此数据，我只是简单地通过模型的所有网格迭代，对于网格的每个INDICE，我都可以访问其相应的顶点。

bool collision(glm::mat4 worldSpaceTransform, glm::vec3 testVector) {
        for (Mesh mesh : meshes) {
            for (int i = 0; i < mesh.indices.size(); i += 3) {
                //iterate through all faces of the mesh since each face has 3 vertices
                glm::vec3 a = glm::vec3(worldSpaceTransform * glm::vec4(mesh.verticies[mesh.indices[i]].position, 1));
                glm::vec3 b = glm::vec3(worldSpaceTransform * glm::vec4(mesh.verticies[mesh.indices[i + 1]].position, 1));
                glm::vec3 c = glm::vec3(worldSpaceTransform * glm::vec4(mesh.verticies[mesh.indices[i + 2]].position, 1)); 
               //use vector a, b and c (transformed to world space) for collision test with the test vector
               //return true if the test vector collides with the triangle
            }
        }
        return false;
    }

因此，我已经使用打印语句来输出应成为三角形的向量A B和C的坐标。在一种情况下，我找不到模型的RAW .OBJ文件中的这些确切的向量，我找到了它们的X，Y和Z坐标，但在一个向量中没有在一起(是的，当我检查此矢量时，我打印了本地空间坐标。(。在另一个中，应该制造三角形的三个向量最终形成了一条线(三个向量中的两个具有相同的坐标(。另外，我知道用模型的所有原始素对向量进行测试效率低下，但是现在，我专注于在查看优化之前获得的工作。对于AABB而言，许多模型太复杂了，因此这是我提出的"最佳"解决方案。所以，我不确定我在这里做错了什么，任何提示都非常感谢！