Method InternReadFile

code/AssetLib/Irr/IRRMeshLoader.cpp:106–422

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

// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure.
void IRRMeshImporter::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 IRRMESH file ", pFile);
    }

    // Construct the irrXML parser
    XmlParser parser;
    if (!parser.parse(file.get())) {
        throw DeadlyImportError("XML parse error while loading IRRMESH file ", pFile);
    }
    XmlNode root = parser.getRootNode();

    // final data
    std::vector<aiMaterial *> materials;
    std::vector<aiMesh *> meshes;
    materials.reserve(5);
    meshes.reserve(5);

    // temporary data - current mesh buffer
    // TODO move all these to inside loop
    aiMaterial *curMat = nullptr;
    aiMesh *curMesh = nullptr;
    unsigned int curMatFlags = 0;

    std::vector<aiVector3D> curVertices, curNormals, curTangents, curBitangents;
    std::vector<aiColor4D> curColors;
    std::vector<aiVector3D> curUVs, curUV2s;

    // some temporary variables
    // textMeaning is a 15 year old variable, that could've been an enum
    // int textMeaning = 0; // 0=none? 1=vertices 2=indices
    // int vertexFormat = 0; // 0 = normal; 1 = 2 tcoords, 2 = tangents
    bool useColors = false;

    // irrmesh files have a top level <mesh> owning multiple <buffer> nodes.
    // Each <buffer> contains <material>, <vertices>, and <indices>
    // <material> tags here directly owns the material data specs
    // <vertices> are a vertex per line, contains position, UV1 coords, maybe UV2, normal, tangent, bitangent
    // <boundingbox> is ignored, I think assimp recalculates those?

    // Parse the XML file
    pugi::xml_node const &meshNode = root.child("mesh");
    for (pugi::xml_node bufferNode : meshNode.children()) {
        if (ASSIMP_stricmp(bufferNode.name(), "buffer")) {
            // Might be a useless warning
            ASSIMP_LOG_WARN("IRRMESH: Ignoring non buffer node <", bufferNode.name(), "> in mesh declaration");
            continue;
        }

        curMat = nullptr;
        curMesh = nullptr;

        curVertices.clear();
        curColors.clear();