Method loadBinary

App/save_system/AppStateIO.cpp:399–492

}

void AppStateIO::loadBinary(Lattice::Simulation& simulation, BaseRenderer& renderer, std::string_view path) {
    std::ifstream file(path.data(), std::ios::binary | std::ios::ate);
    if (!file) {
        throw std::runtime_error("Failed to open save file: " + std::string(path));
    }

    std::streamsize fileSize = file.tellg();
    if (fileSize < static_cast<std::streamsize>(sizeof(uint32_t))) {
        throw std::runtime_error("Save file is too small");
    }
    file.seekg(0, std::ios::beg);

    uint32_t originalSize = 0;
    file.read(reinterpret_cast<char*>(&originalSize), sizeof(originalSize));

    size_t compressedSize = static_cast<size_t>(fileSize) - sizeof(uint32_t);
    std::vector<std::byte> compressedBuffer(compressedSize);
    if (!file.read(reinterpret_cast<char*>(compressedBuffer.data()), compressedSize)) {
        throw std::runtime_error("Failed to read compressed data");
    }

    std::vector<std::byte> decompressedBuffer(originalSize);
    size_t const dSize = ZSTD_decompress(decompressedBuffer.data(), originalSize, compressedBuffer.data(), compressedSize);
    if (ZSTD_isError(dSize)) {
        throw std::runtime_error(std::string("Zstd decompression failed: ") + ZSTD_getErrorName(dSize));
    }

    if (dSize != originalSize) {
        throw std::runtime_error("Decompressed size mismatch");
    }

    AppSaveState appState{};
    try {
        auto in = zpp::bits::in(decompressedBuffer);
        in(appState).or_throw();
    }
    catch (const std::exception& e) {
        std::cerr << "Failed to deserialize save file: " << e.what() << std::endl;
        return;
    }

    // Заголовок
    const auto& header = appState.header;

    // Симуляция
    const auto& simState = appState.simulation;

    simulation.clear();

    simulation.setSizeBox(simState.boxSize, simState.gridCellSize);
    simulation.world().getNeighborList().setCutoff(simState.neighborListCutoff);
    simulation.world().getNeighborList().setSkin(simState.neighborListSkin);

    simulation.setDt(simState.dt);
    simulation.setIntegrator(simState.integrator);
    simulation.setGravity(simState.gravity);
    simulation.setBondFormationEnabled(simState.bondFormationEnabled);
    simulation.setLJEnabled(simState.LJEnabled);