Method Remount

apps/cwr/Game/GameApplication.cpp:1743–1822

}

bool GameApplication::Remount(const char* newModPath)
{
    if (!CanRemount())
    {
        LOG_WARN(Core, "Re-mount refused: a mission is active");
        return false;
    }

    LOG_INFO(Core, "Re-mounting game content (mod='{}')", newModPath != nullptr ? newModPath : "");

    // Mod set to fall back to if the new one fails to load (RStringB is returned
    // by value, so this survives the SetModPath below).
    const auto prevModPath = Poseidon::ModSystem::GetModList();

    // Loading screen on the live window — ProgressSystem is Application-owned and
    // survives the teardown below.
    ProgressStart_Wrapper(IDS_LOAD_INIT);

    // Stop the main loop drawing the world while the content layer is gone.
    // UnloadGameData frees GWorld / GLandscape; a render frame that reaches
    // Landscape::DrawGround -> LandCache::Segment on the freed terrain cache is a
    // use-after-free.  RenderFrame is gated on m_canRender (GameLoop.cpp), so
    // clearing it here closes the window; EnableRendering() restores it only once
    // a load succeeds.
    GApp->m_canRender = false;

    // Trash the game-data layer, keeping window/device/memory/logging alive.
    extern void UnloadGameData(bool keepEngine);
    UnloadGameData(/*keepEngine*/ true);

    // Drop + rebuild GPU resources tied to the old content (no-op on headless).
    if (GEngine)
    {
        GEngine->ResetForRemount();
    }

    // Swap the active mod set, then reload everything from scratch.
    Poseidon::ModSystem::SetModPath(newModPath != nullptr ? newModPath : "");

    if (!LoadGameData())
    {
        // Bad / unsupported mod (e.g. a Workshop package the unpacker rejected).
        // Roll back to the previous set so the app returns to a usable, rendering
        // state instead of a frozen half-mount that the next render frame would
        // crash on (LandCache::Segment on a freed cache), then report failure to
        // the caller so it can surface the error.
        LOG_ERROR(Core, "Re-mount reload failed for mod '{}' — rolling back", newModPath != nullptr ? newModPath : "");
        UnloadGameData(/*keepEngine*/ true);
        if (GEngine)
        {
            GEngine->ResetForRemount();
        }
        Poseidon::ModSystem::SetModPath(prevModPath);
        if (LoadGameData())
        {
            if (GWorld)
            {
                GWorld->StartIntro();