c# print barcode The MeteorsManager GameComponent in Font

Making Data Matrix in Font The MeteorsManager GameComponent

#region Using Statements using using using using using System; System.Collections.Generic; Microsoft.Xna.Framework; Microsoft.Xna.Framework.Graphics; RockRainEnhanced.Core;

#endregion namespace RockRainEnhanced { /// <summary> /// This GameComponent implements a manager for all Meteors in the game. /// </summary> public class MeteorsManager : DrawableGameComponent { // List of active meteors protected List<Meteor> meteors; // Constant for initial meteor count private const int STARTMETEORCOUNT = 10; // Time for a new meteor private const int ADDMETEORTIME = 5000;

protected Texture2D meteorTexture; protected TimeSpan elapsedTime = TimeSpan.Zero; protected AudioComponent audioComponent;

public MeteorsManager(Game game, ref Texture2D theTexture) : base(game) { meteorTexture = theTexture; meteors = new List<Meteor>(); } /// <summary> /// Allows the GameComponent to perform any initialization it needs to /// before starting to run. This is where it can query for any required /// services and load content. /// </summary> public override void Initialize() { audioComponent = (AudioComponent) Game.Services.GetService(typeof (AudioComponent)); meteors.Clear(); Start(); for (int i = 0; i < meteors.Count; i++) { meteors[i].Initialize(); } base.Initialize(); } /// <summary> /// Start the Meteor Rain /// </summary> public void Start() { // Initialize a counter elapsedTime = TimeSpan.Zero;

// Add the meteors for (int i = 0; i < STARTMETEORCOUNT; i++) { AddNewMeteor(); } } /// <summary> /// All Meteors in the game /// </summary> public List<Meteor> AllMeteors { get { return meteors; } } /// <summary> /// Check if it is time for a new meteor /// </summary> private void CheckforNewMeteor(GameTime gameTime) { // Add a rock each ADDMETEORTIME elapsedTime += gameTime.ElapsedGameTime; if (elapsedTime > TimeSpan.FromMilliseconds(ADDMETEORTIME)) { elapsedTime -= TimeSpan.FromMilliseconds(ADDMETEORTIME); AddNewMeteor(); // Play a sound for a new meteor audioComponent.PlayCue("newmeteor"); } } /// <summary> /// Add a new meteor in the scene /// </summary> private void AddNewMeteor() { Meteor newMeteor = new Meteor(Game, ref meteorTexture); newMeteor.Initialize(); meteors.Add(newMeteor);

// Set the meteor identifier newMeteor.Index = meteors.Count - 1; } /// <summary> /// Allows the GameComponent to update itself. /// </summary> /// <param name="gameTime">Provides a snapshot of timing values.</param> public override void Update(GameTime gameTime) { CheckforNewMeteor(gameTime); // Update Meteors for (int i = 0; i < meteors.Count; i++) { meteors[i].Update(gameTime); } base.Update(gameTime); } /// <summary> /// Check if the ship collided with a meteor /// <returns>true, if has a collision</returns> /// </summary> public bool CheckForCollisions(Rectangle rect) { for (int i = 0; i < meteors.Count; i++) { if (meteors[i].CheckCollision(rect)) { // BOOM !! audioComponent.PlayCue("explosion"); // Put the meteor back to your initial position meteors[i].PutinStartPosition(); return true; } }

return false; } /// <summary> /// Allows the GameComponent to draw your content in the game screen /// </summary> public override void Draw(GameTime gameTime) { // Draw the meteors for (int i = 0; i < meteors.Count; i++) { meteors[i].Draw(gameTime); } base.Draw(gameTime); } } }

Observe that this class contains a great deal of the code that was previously inside the Game1 class in the previous chapter, but essentially it does the same thing. You ll use this class later to compose the action scene.

s Note Overall, it s a good idea to create a management class for each group of GameComponents in a

game. It s normal to see classes such as EnemyManager, WizardManager, and so on, because this puts all the complexity of this type of game element in only one class. This simplifies the code and maximizes the reuse of these components in other games.

You still need to create one element of the action scene: the scoreboard. This scoreboard shows the quantity of points and energy of the player s ship. This class is simple: it only draws two lines of text on the screen. Add a class to the project called Score and add the code in Listing 4-5.

#region Using Statements using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Graphics; #endregion namespace RockRainEnhanced { /// <summary> /// This is a GameComponent that implements the Game Score. /// </summary> public class Score : DrawableGameComponent { // Spritebatch protected SpriteBatch spriteBatch = null; // Score Position protected Vector2 position = new Vector2(); // Values protected int value; protected int power; protected readonly SpriteFont font; protected readonly Color fontColor; public Score(Game game, SpriteFont font, Color fontColor) : base(game) { this.font = font; this.fontColor = fontColor; // Get the current spritebatch spriteBatch = (SpriteBatch) Game.Services.GetService(typeof (SpriteBatch)); } /// <summary> /// Points value /// </summary>