Game over

As the saying goes, all good things must come to an end. If the player doesn't meet the pickup threshold, the game will end, and the game over screen will be displayed. The player can choose to replay the game or exit.

The game over screen

Our last screen is the game over screen. By now, the process should be second nature, so let's try an abbreviated approach:

  1. Declare a pointer to the screen:
    Sprite* gameOverScreen;
  2. Instantiate the sprite in LoadTextures:
    gameOverScreen = new Sprite(1);
gameOverScreen->SetFrameSize(800.0f, 600.0f);
gameOverScreen->SetNumberOfFrames(1);
gameOverScreen->AddTexture("resources/gameover.png", false);
gameOverScreen->IsActive(true);
gameOverScreen->IsVisible(true);
  3. Change the GS_GameOver case in the Update function to look like the following code:
     case GameState::GS_GameOver:
 {
  gameOverScreen->Update(p_deltaTime);
  replayButton->IsActive(true);
  replayButton->Update(p_deltaTime);
  exitButton->IsActive(true);
  exitButton->Update(p_deltaTime);
  inputManager->Update(p_deltaTime);
  ProcessInput(p_deltaTime);
 }
 break;
  4. Add the following code to Render:
     case GameState::GS_GameOver:
 {
  gameOverScreen->Render();
  replayButton->Render();
  DrawStats();
 }
 break;

As a bonus, we will also draw the game stats on the game over screen.

The game over screen

Replaying the game

We need a way to reset the game to its initial state. So, let's create a function to do this:

void RestartGame()
{
   player->SetValue(0);
 robot_right->SetValue(0);
 robot_left->SetValue(0);

pickupSpawnThreshold = 5.0f;
  pickupSpawnTimer = 0.0f;
  enemySpawnThreshold = 7.0f;
  enemySpawnTimer = 0.0f;
  splashDisplayTimer = 0.0f;
  splashDisplayThreshold = 5.0f;
  
  levelTimer = 0.0f;
  
  pickupsReceived = 0;
  pickupsThreshold = 5;
pickupsReceived = 0;
  
  pickup->IsVisible(false);
  enemy->IsVisible(false);
  
  background->SetVelocity(0.0f);
  robot_left->SetPosition(screen_width / 2.0f - 50.0f, screen_height - 130.0f);
  robot_left->IsVisible(false);
  
  robot_right->SetPosition(screen_width / 2.0f - 50.0f, screen_height - 130.0f);
  
  player = robot_right;
  player->IsActive(true);
  player->IsVisible(true);
  player->SetVelocity(0.0f);
}

Next, we need to add a button that allows the player to replay the game. Again, as you have done this so many times, we will use a shorthand approach:

  1. Declare a pointer for the button:
    Sprite* replayButton;
  2. Instantiate the button in LoadTextures:
    replayButton = new Sprite(1);
replayButton->SetFrameSize(75.0f, 38.0f);
replayButton->SetNumberOfFrames(1);
replayButton->SetPosition(390.0f, 400.0f);
replayButton->AddTexture("resources/replayButton.png");
replayButton->IsVisible(true);
replayButton->IsActive(false);
inputManager->AddUiElement(replayButton);
  3. Add the following code to Update:
    case GameState::GS_GameOver:
 {
  gameOverScreen->Update(p_deltaTime);
  replayButton->IsActive(true);
  replayButton->Update(p_deltaTime);
  exitButton->IsActive(true);
  exitButton->Update(p_deltaTime);
  inputManager->Update(p_deltaTime);
  ProcessInput(p_deltaTime);
 }
 break;
  4. Add the following code to Render:
     case GameState::GS_GameOver:
 {
  gameOverScreen->Render();
  replayButton->Render();
  DrawStats();
 }
 break;
  5. Add the following code to ProcessInput:
    if (replayButton->IsClicked())
{
  replayButton->IsClicked(false);
  replayButton->IsActive(false);
  exitButton->IsActive(false);
  RestartGame();
  m_gameState = GameState::GS_Running;
}

Notice how we are reusing the exit button in the Update function. Also, if the player wants to replay the game, we call the RestartGame function when the player clicks the replay button. This resets all of the game variables and allows the player to start all over.

Replaying the game
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