SpaceEscape

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Overview

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Class Declaration

public class SpaceEscape extends Game

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Angry Birds Adaptations

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Visual Elements

• Player: Red bird (red.png) representing the controllable character
• Obstacles: Pigs (cerdo.png) as enemies to destroy
• Bullets: Red projectiles (bala.jpg) representing bird attacks

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Audio Theme

• Menu Music: Angry Birds main theme (angry-birds.mp3)
• Game Music: Epic battle music (battle.mp3)
• Sound Effects:
  • Shoot: Launch sound (piuw.mp3)
  • Explosion: Pig death sound (muerteCerdo.mp3)
  • Motor: Tension drone sound (tension-drones.mp3)

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Game Mechanics

• Asteroids are now pigs falling from above
• Player is a bird defending its position
• Score = survival time + 10 points per pig destroyed
• Visual effects include shooting flash and adjusted hitboxes

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Cross-Platform Controls

• Touch: Swipe to move
• Keyboard: Arrow keys for movement, SPACE to shoot
• Mouse: Right-click as alternative shooting method

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Key Fields

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Graphics and Rendering

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Game State Management

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Game Objects

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Timing and Scoring

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Audio

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Visual Effects

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Screens

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Methods

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create()

@Override
public void create()

• Creates sprite batch for rendering
• Loads all textures (background, logo, player, obstacles, bullets)
• Initializes fonts and UI elements
• Creates player at centered position (x: center, y: 50) with size 64x64 and speed 5f
• Initializes empty obstacle array
• Loads Angry Birds theme music for menu (volume 0.5, looping)
• Loads battle music for gameplay (volume 1.5, looping)
• Loads pig death sound effect
• Creates white pixel texture for flash effects
• Initializes score counters to 0

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render()

@Override
public void render()

1. Clears screen with dark blue color (0.15, 0.15, 0.2)
2. Calls actualizarObjetos() to update game logic
3. Calls gestionarInputs() to handle user input
4. Renders current state via representacionEstado()
5. Processes state changes if gameStateChanged is true

• GAME_OVER → MENU: Clears obstacles, stops game music, plays menu music, resets score/counters/timers
• MENU → PLAYING: Pauses menu music, plays game music, activates player, resets game time and spawn timer, clears obstacles

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dispose()

@Override
public void dispose()

• Sprite batch
• All textures (background, player, obstacles, bullets, white pixel)
• Fonts
• Player object
• Background music (menu and game)
• Sound effects

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gestionarInputs()

private void gestionarInputs()

• Touch screen → Start game
• SPACE or ENTER → Start game

• Touch screen → Move player towards touch position (with 5-pixel dead zone)
• Arrow keys → Move player (LEFT, RIGHT, UP, DOWN)
• SPACE → Shoot bullet and trigger flash effect
• Right mouse button → Shoot bullet and trigger flash effect
• ENTER → Calculate final score and show score screen
• ESCAPE → End game (transition to GAME_OVER)

• ENTER → Return to menu, stop game music, show score screen

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actualizarObjetos()

private void actualizarObjetos()

1. Gets delta time for frame-independent updates
2. If PLAYING state:
   • Increments game time
   • Increments spawn timer
   • Spawns new obstacle every 0.5 seconds
3. Updates player
4. Updates all obstacles and removes off-screen ones
5. Detects bullet-asteroid collisions
6. Updates flash effect timer

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detectarColisionesBalasAsteroides()

private void detectarColisionesBalasAsteroides()

• Iterates through all bullets (reverse order)
• For each bullet, checks collision with all obstacles
• On collision:
  • Calls obstacle.destroy()
  • Plays explosion sound at 70% volume
  • Increments asteroidsDestroyed counter
  • Deactivates and removes bullet
  • Breaks inner loop to prevent multiple hits

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calcularPuntuacionFinal()

private void calcularPuntuacionFinal()

score = (int)gameTime + (asteroidsDestroyed × 10)

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addObstacle()

private void addObstacle()

• Width: 62 pixels
• Height: 48 pixels
• X position: Random between 0 and screen width minus obstacle width
• Y position: Top of screen (screen height)
• Speed: 3f pixels per frame

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representacionEstado()

private void representacionEstado()

• Draws game logo at full screen
• Displays instructions: “Pulsa ESPACIO o ENTER para comenzar”
• Shows controls: “FLECHAS para mover, ESPACIO para disparar”
• Shows score viewing option: “ENTER para ver puntuación durante el juego”
• Plays menu music

• Draws night background
• Renders flash effect if active (white overlay at 60% opacity)
• Displays UI text:
  • White: “Pulsa ESC para terminar”, “ENTER para ver puntuación”
  • Yellow: Time, asteroids destroyed count, current score (top-right)
  • Red: “Jugando…” centered
• Renders player and all bullets
• Renders all obstacles
• Checks player-obstacle collisions → triggers GAME_OVER
• Renders score screen if showScoreScreen is true

• Clears screen with red color
• Displays in yellow:
  • “GAME OVER” title
  • “Puntuación final: ”
  • “Pulsa ENTER para volver al menú”

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Usage Example

public class DesktopLauncher {
    public static void main(String[] args) {
        Lwjgl3ApplicationConfiguration config = new Lwjgl3ApplicationConfiguration();
        config.setTitle("Space Birds");
        config.setWindowedMode(800, 600);
        config.setForegroundFPS(60);
        
        new Lwjgl3Application(new SpaceEscape(), config);
    }
}

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State Flow Diagram

MENU → (Touch/Space/Enter) → PLAYING
                                  ↓
                        (ESC/Collision)
                                  ↓
                              GAME_OVER
                                  ↓
                              (Enter)
                                  ↓
                                MENU

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Related Classes

• GameState - Enum defining the three game states
• Player - Player character class with movement and shooting
• Obstacle - Obstacle (pig) class with movement and collision
• Bullet - Bullet projectile class
• ScoreScreen - Score display screen