I have loaded a sound effect file into the main class in xna, but when I try to run it in another class I am given this error
{"Object reference not set to an instance of an object."}
I am new to XNA classes so I do not really understand them. Any help as soon as possible is greatly appreciated.
this is part of the main class
using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;
namespace BreakingOut
{
/// <summary>
/// This is the main type for your game
/// </summary>
public class Game1 : Microsoft.Xna.Framework.Game
{
GraphicsDeviceManager graphics;
SpriteBatch spriteBatch;
Ball ball;
Paddle paddle;
Rectangle screenRectangle;
bool is1P = true;
int lives = 3;
Texture2D startButtonTexture;
Vector2 buttonVec;
Texture2D exitButtonTexture;
Vector2 button2Vec;
int bricksWide = 10;
int bricksHigh = 7;
Texture2D brickImage;
Brick[,] bricks;
//rec for menu
Texture2D menuTexture;
Rectangle menuRec = new Rectangle(0, 0, 960, 640);
//rec for pause
Texture2D pauseTexture;
Rectangle pauseRec = new Rectangle(0, 0, 960, 640);
//lose
Texture2D loseTexture;
Rectangle loseRec = new Rectangle(0, 0, 960, 640);
Texture2D winTexture;
Rectangle winRec = new Rectangle(0, 0, 960, 640);
//sound effects
public SoundEffect BallHitSE;
SoundEffect WallHitSE;
SoundEffect StartSE;
//BGM
Song menuMusic;
Song gameMusic;
bool isGameMusicPlaying = false;
bool isMenuMusicPlaying = false;
float pauseTimer;
float exitTimer;
float muteTimer;
float SEmuteTimer;
//public int brickCount = 70;
SpriteFont font;
Vector2 mousePos;
enum gameStates
{
MENU,
GAME1P,
LOSE,
PAUSE,
WIN,
}
gameStates currentState = gameStates.MENU;
gameStates prevState = gameStates.MENU;
public Game1()
{
graphics = new GraphicsDeviceManager(this);
Content.RootDirectory = "Content";
IsMouseVisible = true;
graphics.PreferredBackBufferWidth = 960;
graphics.PreferredBackBufferHeight = 640;
screenRectangle = new Rectangle(
0,
0,
graphics.PreferredBackBufferWidth,
graphics.PreferredBackBufferHeight);
}
/// <summary>
/// Allows the game to perform any initialization it needs to before starting to run.
/// This is where it can query for any required services and load any non-graphic
/// related content. Calling base.Initialize will enumerate through any components
/// and initialize them as well.
/// </summary>
protected override void Initialize()
{
// TODO: Add your initialization logic here
base.Initialize();
}
/// <summary>
/// LoadContent will be called once per game and is the place to load
/// all of your content.
/// </summary>
protected override void LoadContent()
{
// Create a new SpriteBatch, which can be used to draw textures.
spriteBatch = new SpriteBatch(GraphicsDevice);
Texture2D tempTexture = Content.Load<Texture2D>("paddle");
paddle = new Paddle(tempTexture, screenRectangle);
BallHitSE = Content.Load<SoundEffect>("BallHit");
WallHitSE = Content.Load<SoundEffect>("WallHit2");
StartSE = Content.Load<SoundEffect>("Start");
gameMusic = Content.Load<Song>("gameMusic");
menuMusic = Content.Load<Song>("menuMusic");
This is the Ball class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
namespace BreakingOut
{
class Ball
{
Vector2 motion;
Vector2 position;
Rectangle bounds;
bool collided;
public int brickCount = 70;
const float ballStartSpeed = 6.4f;
public float ballSpeed;
Texture2D texture;
Rectangle screenBounds;
SoundEffect BallHitSE;
//BallHitSE = new SoundEffect
public Rectangle Bounds
{
get
{
bounds.X = (int)position.X;
bounds.Y = (int)position.Y;
return bounds;
}
}
public Ball(Texture2D texture, Rectangle screenBounds)
{
bounds = new Rectangle(0, 0, texture.Width, texture.Height);
this.texture = texture;
this.screenBounds = screenBounds;
//Different things we tried
//BallHitSE = Content.Load<SoundEffect>("BallHit");
//BallHitSE = new soundeffect(what goes in here?);
//BallHitSE = Content.Manager.Load("path")
}
public void Update()
{
collided = false;
position += motion * ballSpeed;
ballSpeed += 0.001f;
CheckWallCollision();
}
public void CheckWallCollision()
{
if (position.X < 0)
{
position.X = 0;
motion.X *= -1;
//if (BallHitSE != null)
//{
BallHitSE.Play();
//}
}
if (position.X + texture.Width > screenBounds.Width)
{
position.X = screenBounds.Width - texture.Width;
motion.X *= -1;
//if (BallHitSE != null)
//{
BallHitSE.Play();
//}
}
if (position.Y < 0)
{
position.Y = 0;
motion.Y *= -1;
//if (BallHitSE != null)
//{
BallHitSE.Play();
//}
}
}
public void SetInStartPosition(Rectangle paddleLocation)
{
Random rand = new Random();
motion = new Vector2(rand.Next(2, 6), -rand.Next(2, 6));
motion.Normalize();
ballSpeed = ballStartSpeed;
position.Y = paddleLocation.Y - texture.Height;
position.X = paddleLocation.X + (paddleLocation.Width - texture.Width) / 2;
}
public bool OffBottom()
{
if (position.Y > screenBounds.Height)
return true;
return false;
}
public void PaddleCollision(Rectangle paddleLocation)
{
Rectangle ballLocation = new Rectangle(
(int)position.X,
(int)position.Y,
texture.Width,
texture.Height);
if (paddleLocation.Intersects(ballLocation))
{
position.Y = paddleLocation.Y - texture.Height;
motion.Y *= -1;
}
}
public void Deflection(Brick brick)
{
if (!collided)
{
motion.Y *= -1;
collided = true;
brickCount -= 1;
}
}
public void Draw(SpriteBatch spriteBatch)
{
spriteBatch.Draw(texture, position, Color.White);
for (int i = 1; i < 10; i++)
{
var drawPosition = position - (i * motion * 3);
var colour = Color.Lerp(Color.White, Color.Transparent, i * (20 / 100f));
spriteBatch.Draw(texture, drawPosition, colour);
}
}
}
}
