Game Loop

How CNA's Game base class drives GalaxyEggbertCnaGame each frame.

Loop Ownership

GalaxyEggbertCnaGame does not implement its own loop — it inherits one from CNA's Microsoft::Xna::Framework::Game base class (XNA-style: LoadContent once, then Update/Draw every frame with a GameTime).

Update(GameTime& gameTime)

void GalaxyEggbertCnaGame::Update(GameTime& gameTime) {
    Game::Update(gameTime);
    worldRuntime_.Update(dt);              // advances 6 fps tile-animation phase
    auto keys = Keyboard::GetState();
    float dx = /* from arrow keys */;
    float dz = /* from arrow keys */;
    bool jump = keys.IsKeyDown(Keys::Space);
    blupi_.Step(worldRuntime_.GetWorld(), dx, dz, jump, dt);
    camera_.SetTarget(blupi_.GetPosition());
    camera_.Update(dt);
}

Draw(const GameTime& gameTime)

void GalaxyEggbertCnaGame::Draw(const GameTime& gameTime) {
    device.Clear(Color(0.392f, 0.584f, 0.929f, 1.0f));  // sky blue
    device.SetDepthTestEnabled(true);
    terrainEffect_->View       = camera_.GetViewMatrix();
    terrainEffect_->Projection = camera_.GetProjectionMatrix();
    terrainEffect_->World      = Matrix::Identity;
    terrainRenderer_->Draw(device, *terrainEffect_);
}

Tile Animation Timing

GEWorldRuntime::Update(dt) accumulates an internal timer and advances animPhase_ at a fixed period of 1/6 second (6 fps) — matching both GalaxyEggbertSimple3D and mobile-eggbert's original animation rate. GETerrainRenderer checks GetAnimPhase() and only rebuilds its animated cube mesh when the phase actually changes.

What's Missing Compared to a Full Game Loop

• No phase/state-machine dispatch (GamePhase exists as an enum but nothing switches on it in CNA yet).
• No fixed-timestep accumulator — CNA's own Game loop timing model is used as-is.
• No pause, no menu, no win/lose handling.