Method InternReadFile

code/AssetLib/OFF/OFFLoader.cpp:96–325

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

// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure.
void OFFImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) {
    std::unique_ptr<IOStream> file(pIOHandler->Open(pFile, "rb"));

    // Check whether we can read from the file
    if (file == nullptr) {
        throw DeadlyImportError("Failed to open OFF file ", pFile, ".");
    }

    // allocate storage and copy the contents of the file to a memory buffer
    std::vector<char> mBuffer2;
    TextFileToBuffer(file.get(), mBuffer2);
    const char *buffer = &mBuffer2[0];

    // Proper OFF header parser. We only implement normal loading for now.
    bool hasTexCoord = false, hasNormals = false, hasColors = false;
    bool hasHomogenous = false, hasDimension = false;
    unsigned int dimensions = 3;
    const char *car = buffer;
    const char *end = buffer + mBuffer2.size();
    NextToken(&car, end);

    if (car < end - 2 && car[0] == 'S' && car[1] == 'T') {
        hasTexCoord = true;
        car += 2;
    }
    if (car < end - 1 && car[0] == 'C') {
        hasColors = true;
        car++;
    }
    if (car < end - 1 && car[0] == 'N') {
        hasNormals = true;
        car++;
    }
    if (car < end - 1 && car[0] == '4') {
        hasHomogenous = true;
        car++;
    }
    if (car < end - 1 && car[0] == 'n') {
        hasDimension = true;
        car++;
    }
    if (car < end - 3 && car[0] == 'O' && car[1] == 'F' && car[2] == 'F') {
        car += 3;
        NextToken(&car, end);
    } else {
        // in case there is no OFF header (which is allowed by the
        // specification...), then we might have unintentionally read an
        // additional dimension from the primitive count fields
        dimensions = 3;
        hasHomogenous = false;
        NextToken(&car, end);

        // at this point the next token should be an integer number
        if (car >= end - 1 || *car < '0' || *car > '9') {
            throw DeadlyImportError("OFF: Header is invalid");
        }
    }
    if (hasDimension) {