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POXNA game not launching under very strange conditions
 

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  1. POXNA game not launching under very strange conditions
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    <p>First thing to get out of the way, sorry if I'm missing something (very) obvious, I'm still kinda new at this.</p> <p>Anyway, I've been working on an asteroids clone in XNA, and for some reason it would occasionally not start if I hit the Start Debugging button. I tracked the problem to my AsteroidsManager class, which takes an int of initial asteroids to generate, minimum and maximum velocities and rotational velocites, and two texture lists for asteroids and particles. Now the weirdness:</p> <pre><code>temp = new AsteroidManager(1, 20, 50, 1, 2, asteroids, particles, true); //With this constructor, the game always starts fine... </code></pre> <p>But if I crank up the number of initial asteroids:</p> <pre><code>temp = new AsteroidManager(10, 20, 50, 1, 2, asteroids, particles, true); //This seems to start about 1/3 times in the Visual Studio debugger, but if I launch it without debugging or from the bin folder, it works fine. </code></pre> <p>And lastly, if I set the asteroids to more than ~20, it never starts in the debugger, and if I try to start it from the folder, the process appears in the task manager, but nothing ever happens. Or it just crashes on launch. I honestly have no idea what's causing this, and will gladly provide any code if needed, but here's what I think is relevant:</p> <p>Full AsteroidManager:</p> <pre><code>public class AsteroidManager { #region Declarations public List&lt;GameObject&gt; Asteroids { get; set; } public bool RegenerateAsteroids { get; set; } public readonly int InitialAsteroids; public readonly float MinVelocity; public readonly float MaxVelocity; public readonly float MinRotationalVelocity; //in degrees public readonly float MaxRotationalVelocity; //in degrees public readonly List&lt;Texture2D&gt; Textures; public readonly List&lt;Texture2D&gt; ExplosionParticleTextures; List&lt;ParticleEmitter&gt; emitters; Random rnd; const int MINPARTICLES = 50; const int MAXPARTICLES = 200; const int PARTICLEFTL = 40; #endregion public AsteroidManager( int initialAsteroids, float minVel, float maxVel, float minRotVel, float maxRotVel, List&lt;Texture2D&gt; textures, List&lt;Texture2D&gt; explosionParticleTextures, bool regenAsteroids) { rnd = new Random(); InitialAsteroids = initialAsteroids; MinVelocity = minVel; MaxVelocity = maxVel; MinRotationalVelocity = minRotVel; MaxRotationalVelocity = maxRotVel; Textures = textures; ExplosionParticleTextures = explosionParticleTextures; RegenerateAsteroids = regenAsteroids; Asteroids = new List&lt;GameObject&gt;(); emitters = new List&lt;ParticleEmitter&gt;(); for (int i = 0; i &lt; InitialAsteroids; i++) addAsteroid(); } public void Update(GameTime gameTime) { for (int i = 0; i &lt; Asteroids.Count; i++) Asteroids[i].Update(gameTime); for (int i = 0; i &lt; emitters.Count; i++) emitters[i].Update(gameTime); if (Asteroids.Count &lt; InitialAsteroids &amp;&amp; RegenerateAsteroids) addAsteroid(); } public void Draw(SpriteBatch spriteBatch) { for (int i = 0; i &lt; Asteroids.Count; i++) Asteroids[i].Draw(spriteBatch); for (int i = 0; i &lt; emitters.Count; i++) emitters[i].Draw(spriteBatch); } public void DestroyAsteroid(GameObject asteroid) { int x = rnd.Next(MINPARTICLES, MAXPARTICLES); List&lt;Color&gt; colors = new List&lt;Color&gt;(); colors.Add(Color.White); emitters.Add(new ParticleEmitter( //TODO: Test x, asteroid.WorldCenter, ExplosionParticleTextures, colors, PARTICLEFTL, true, 1, x, 1f, 0.3f, 0f, 180f)); Asteroids.Remove(asteroid); } protected void addAsteroid() { GameObject tempAsteroid; bool isOverlap = false; do //Do-While to ensure that the asteroid gets generated at least once { Texture2D text = Textures.PickRandom&lt;Texture2D&gt;(); float rot = MathHelper.ToRadians((float)rnd.NextDouble(0f, 359f)); float rotVel = MathHelper.ToRadians((float)rnd.NextDouble(MinRotationalVelocity, MaxRotationalVelocity)); int colRadius = (((text.Width / 2) + (text.Height / 2)) / 2); //Get the mean of text's height &amp; width Vector2 vel = Vector2.Multiply( //calculate a random velocity rot.RotationToVectorFloat(), (float)rnd.NextDouble(MinVelocity, MaxVelocity)); Vector2 worldPos = new Vector2( rnd.Next(Camera.WorldRectangle.X, Camera.WorldRectangle.Width), rnd.Next(Camera.WorldRectangle.Y, Camera.WorldRectangle.Height)); tempAsteroid = new GameObject( //init a temporary asteroid to check for overlaps text, worldPos, vel, Color.White, false, rot, rotVel, 1f, 0f, colRadius); foreach (GameObject asteroid in Asteroids) { if (tempAsteroid.BoundingBox.Intersects(asteroid.BoundingBox)) { isOverlap = true; break; } } } while (isOverlap); //if overlapping, loop Asteroids.Add(tempAsteroid); //add the temp asteroid } } </code></pre> <p>Full GameObject:</p> <pre><code>public class GameObject { #region Declarations public Texture2D Texture { get; set; } public Vector2 Origin { get; set; } public Color TintColor { get; set; } public float Rotation { get; set; } //radians public float RotationalVelocity { get; set; } public float Scale { get; set; } public float Depth { get; set; } public bool Active { get; set; } public SpriteEffects Effects { get; set; } public Vector2 WorldLocation { get; set; } public Vector2 Velocity { get; set; } public int CollisionRadius { get; set; } //Radius for bounding circle collision public int BoundingXPadding { get; set; } public int BoundingYPadding { get; set; } //Padding for bounding box collision public int TotalFrames { get //simple get { return totalFrames; } set //check if given totalFrames is in possible range { if (value &lt;= (Rows * Columns)) totalFrames = value; else throw new ArgumentOutOfRangeException(); } } //Used in spritesheet animation private int totalFrames; public int CurrentFrame { get { return currentFrame; } set { currentFrame = (int)MathHelper.Clamp(value, 0, totalFrames); } } private int currentFrame; public int Rows { get; set; } public int Columns { get; set; } public bool Animating { get; set; } public float RotationDegrees { get { return MathHelper.ToDegrees(Rotation); } set { Rotation = MathHelper.ToRadians(value); } } public float RotationVelocityDegrees { get { return MathHelper.ToDegrees(RotationalVelocity); } set { RotationalVelocity = MathHelper.ToRadians(value); } } public const float VELOCITYSCALAR = 1.0f / 60.0f; //Default to 60fps standard movement #endregion #region Properties public int GetWidth { get { return Texture.Width / Columns; } } //Width of a frame public int GetHeight { get { return Texture.Height / Rows; } } //Height of a frame public int GetRow { get { return (int)((float)CurrentFrame / (float)Columns); } } //Current row public int GetColumn { get { return CurrentFrame % Columns; } } //Current column public Vector2 SpriteCenter { get { return new Vector2(GetWidth / 2, GetHeight / 2); } } //Get this Sprite's center public Rectangle WorldRectangle //get rectangle in world coords with width of sprite { get { return new Rectangle( (int)WorldLocation.X, (int)WorldLocation.Y, GetWidth, GetHeight); } } public Rectangle BoundingBox //get bounding box for use in collision detection { get { return new Rectangle( //Get bounding box with respect to padding values (int)WorldLocation.X + BoundingXPadding, (int)WorldLocation.Y + BoundingYPadding, GetWidth - (BoundingXPadding * 2), GetHeight - (BoundingYPadding * 2)); } } public Vector2 ScreenLocation { get { return Camera.GetLocalCoords(WorldLocation); } } //get screen coordinates public Rectangle ScreenRectangle { get { return Camera.GetLocalCoords(WorldRectangle); } } //get screen rectangle public Vector2 WorldCenter { get { return WorldLocation + SpriteCenter; } set { WorldLocation = value - SpriteCenter; } } //gets/sets the center of the sprite in world coords public Vector2 ScreenCenter { get { return Camera.GetLocalCoords(WorldLocation + SpriteCenter); } } //returns the center in screen coords #endregion public GameObject( //main constructor, /w added optional parameters and call to SpriteBase init Texture2D texture, Vector2 worldLocation, Vector2 velocity, Color tintColor, bool animating = false, float rotation = 0f, //default to no rotation float rotationalVelocity = 0f, float scale = 1f, //default to 1:1 scale float depth = 0f, //default to 0 layerDepth int collisionRadius = 0, //collision radius used in bounding circle collision, default to 0 or no bounding circle int xPadding = 0, //amount of x padding, used in bounding box collision, default to 0, or no bounding box int yPadding = 0, //amount of y padding, used in bounding box collision, default to 0, or no bounding box SpriteEffects effects = SpriteEffects.None, int totalFrames = 0, int rows = 1, int columns = 1) { if (texture == null) { throw new NullReferenceException("Null texture reference."); } Texture = texture; //assign parameters WorldLocation = worldLocation; TintColor = tintColor; Rotation = rotation; RotationalVelocity = rotationalVelocity; Scale = scale; Depth = depth; Effects = effects; Velocity = velocity; Animating = animating; Active = true; BoundingXPadding = xPadding; BoundingYPadding = yPadding; CollisionRadius = collisionRadius; //assign collision data Rows = rows; Columns = columns; this.TotalFrames = totalFrames; //assign animation data Origin = SpriteCenter; //assign origin to the center of a frame } #region Methods public virtual void Update(GameTime gameTime) { if (Active) //if object is active { WorldLocation += Velocity * (1f / 60f); Rotation += RotationalVelocity; //Rotate according to the velocity //Move by Velocity times a roughly 60FPS scalar if (TotalFrames &gt; 1 &amp;&amp; Animating) { CurrentFrame++; if (CurrentFrame &gt;= TotalFrames) CurrentFrame = 0; //Loop animation } if (Camera.IsObjectInWorld(this.WorldRectangle) == false) { if (Camera.LOOPWORLD) //if world is looping and the object is out of bounds { Vector2 temp = WorldCenter; //temporary Vector2 used for updated position //X-Axis Component if (WorldCenter.X &gt; Camera.WorldRectangle.Width) temp.X = Camera.WorldRectangle.X - (GetWidth / 2); //If X is out of bounds to the right, move X to the left side if (WorldCenter.X &lt; Camera.WorldRectangle.X) temp.X = Camera.WorldRectangle.Width + (GetWidth / 2); //If X is out of bound to the left, move X to the right side //Y-Axis Component if (WorldCenter.Y &gt; Camera.WorldRectangle.Height) temp.Y = Camera.WorldRectangle.Y - (GetHeight / 2); //If Y is out of bounds to the bottom, move Y to the top if (WorldCenter.Y &lt; Camera.WorldRectangle.Y) temp.Y = Camera.WorldRectangle.Height + (GetHeight / 2); //If Y is out of bounds to the top, move Y to the bottom WorldCenter = temp; //Assign updated position } if (Camera.LOOPWORLD == false) { Active = false; //if the object is outside the world but the LOOPWORLD constant is false, set inactive } } } } public virtual void Draw(SpriteBatch spriteBatch) { if (Active) { if (TotalFrames &gt; 1 &amp;&amp; Camera.IsObjectVisible(WorldRectangle)) //if multi-frame animation &amp; object is visible { Rectangle sourceRectangle = new Rectangle(GetWidth * GetColumn, GetHeight * GetRow, GetWidth, GetHeight); //get source rectangle to use spriteBatch.Draw( Texture, ScreenCenter, sourceRectangle, //use generated source rectangle TintColor, Rotation, Origin, Scale, Effects, Depth); } else //if single frame sprite { if (Camera.IsObjectVisible(WorldRectangle)) //check if sprite is visible to camera { spriteBatch.Draw( Texture, ScreenCenter, //center of the sprite in local coords null, //full sprite TintColor, Rotation, Origin, Scale, Effects, //spriteeffects Depth); //layerdepth } } } } public bool IsBoxColliding(Rectangle obj) //bounding box collision test { return BoundingBox.Intersects(obj); } public bool IsBoxColliding(GameObject obj) //overload of previous which takes a GameObject instead of a rectangle { if (BoundingBox.Intersects(obj.BoundingBox)) return true; else return false; } public bool IsCircleColliding(Vector2 objCenter, float objRadius) { if (Vector2.Distance(WorldCenter, objCenter) &lt; (CollisionRadius + objRadius)) //if the distance between centers is greater than the sum return true; //of the radii, collision has occurred else return false; //if not, return false } public bool IsCircleColliding(GameObject obj) //overload of previous which takes a GameObject instead of loose values { if (Vector2.Distance(this.WorldCenter, obj.WorldCenter) &lt; (CollisionRadius + obj.CollisionRadius)) return true; else return false; } public void RotateTo(Vector2 point) //rotates the GameObject to a point { Rotation = (float)Math.Atan2(point.Y, point.X); } protected Vector2 rotationToVector() { return Rotation.RotationToVectorFloat(); } //local version of extension method #endregion } </code></pre> <p>Game1 Draw:</p> <pre><code> protected override void Draw(GameTime gameTime) { GraphicsDevice.Clear(Color.CornflowerBlue); spriteBatch.Begin(); //BEGIN SPRITE DRAW fpsDisplay.Draw(spriteBatch); temp.Draw(spriteBatch); spriteBatch.End(); //END SPRITE DRAW base.Draw(gameTime); } </code></pre> <p>Game1 Update:</p> <pre><code> protected override void Update(GameTime gameTime) { InputHandler.Update(); //update InputHandler if (InputHandler.IsKeyDown(Keys.Left)) Camera.Position += new Vector2(-3f, 0f); if (InputHandler.IsKeyDown(Keys.Right)) Camera.Position += new Vector2(3f, 0f); if (InputHandler.IsKeyDown(Keys.Up)) Camera.Position += new Vector2(0f, -3f); if (InputHandler.IsKeyDown(Keys.Down)) Camera.Position += new Vector2(0f, 3f); fpsDisplay.Value = (int)Math.Round(1 / gameTime.ElapsedGameTime.TotalSeconds, 0); //calculate framerate to the nearest int temp.Update(gameTime); base.Update(gameTime); } </code></pre>
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