Method InternReadFile

code/AssetLib/Irr/IRRLoader.cpp:1204–1349

------------------------------------------------------------------------------------------------ Imports the given file into the given scene structure.

// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure.
void IRRImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) {
    std::unique_ptr<IOStream> file(pIOHandler->Open(pFile));
    // Check whether we can read from the file
    if (file == nullptr) {
        throw DeadlyImportError("Failed to open IRR file ", pFile);
    }

    // Construct the irrXML parser
    XmlParser st;
    if (!st.parse(file.get())) {
        throw DeadlyImportError("XML parse error while loading IRR file ", pFile);
    }
    pugi::xml_node documentRoot = st.getRootNode();

    // The root node of the scene
    Node *root = new Node(Node::DUMMY);
    root->parent = nullptr;
    root->name = "<IRRSceneRoot>";

    // Batch loader used to load external models
    BatchLoader batch(pIOHandler);
    // batch.SetBasePath(pFile);

    cameras.reserve(1); // Probably only one camera in entire scene
    lights.reserve(5);

    this->guessedAnimCnt = 0;
    this->guessedMeshCnt = 0;
    this->guessedMatCnt = 0;

    // Parse the XML
    // Find the scene root from document root.
    const pugi::xml_node &sceneRoot = documentRoot.child("irr_scene");
    if (!sceneRoot) {
        delete root;
        throw new DeadlyImportError("IRR: <irr_scene> not found in file");
    }
    for (pugi::xml_node &child : sceneRoot.children()) {
        // XML elements are either nodes, animators, attributes, or materials
        if (!ASSIMP_stricmp(child.name(), "node")) {
            // Recursive collect subtree children
            Node *nd = ParseNode(child, batch);
            // Attach to root
            root->children.push_back(nd);
        }
    }

    //  Now iterate through all cameras and compute their final (horizontal) FOV
    for (aiCamera *cam : cameras) {
        // screen aspect could be missing
        if (cam->mAspect) {
            cam->mHorizontalFOV *= cam->mAspect;
        } else {
            ASSIMP_LOG_WARN("IRR: Camera aspect is not given, can't compute horizontal FOV");
        }
    }

    batch.LoadAll();