In continuing with my powerups for my pong game, I’ve gotten them working correctly for the most part (LARGELY thanks to Jim Perry ), but now I can’t seem to get my bats (paddles) to grow or shrink when called on.
I’m thinking it has something to do with the way I’m calling the size of the bat. In my Bat class I have a function called GetSize() which returns the size of the bat.
public Rectangle GetSize()
{
return size;
}
I’m basically trying to double the size of the bat in one function, and half the size of the original bat in another.
public void GrowBat()
{
}
public void ShrinkBat()
{
}
If I insert something like what I have below into the function, I am not noticing any change in the bats.
public void GrowBat()
{
size = new Rectangle(0, 0, leftBat.Width * 2, leftBat.Height *2);
}
public void ShrinkBat()
{
size = new Rectangle(0, 0, leftBat.Width / 2, leftBat.Height / 2);
}
I’m thinking it has something to do with me not returning the size of the bats. How would you guys resolve this?
I’ve included my Bat and Game1 classes below to help clarify, in particular the switch statements in my Game1 class for the powerups, about half way down.
namespace Pong
{
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using System;
public class Bat
{
public Vector2 position;
public float moveSpeed;
public Rectangle size;
private int points;
private int yHeight;
private Texture2D leftBat;
public float turbo;
public float recharge;
public float interval;
public bool isTurbo;
public Bat(ContentManager content, Vector2 screenSize, bool side)
{
moveSpeed = 7f;
turbo = 15f;
recharge = 100f;
points = 0;
interval = 5f;
leftBat = content.Load<Texture2D>(@"gfx/batGrey");
size = new Rectangle(0, 0, leftBat.Width, leftBat.Height);
if (side) position = new Vector2(30, screenSize.Y / 2 - size.Height / 2);
else position = new Vector2(screenSize.X - 30, screenSize.Y / 2 - size.Height / 2);
yHeight = (int)screenSize.Y;
}
public void IncreaseSpeed()
{
moveSpeed += .5f;
}
public void Turbo()
{
moveSpeed += 7.0f;
}
public void DisableTurbo()
{
moveSpeed = 7.0f;
isTurbo = false;
}
public Rectangle GetSize()
{
return size;
}
public void IncrementPoints()
{
points++;
}
public int GetPoints()
{
return points;
}
public void SetPosition(Vector2 position)
{
if (position.Y < 0)
{
position.Y = 0;
}
if (position.Y > yHeight - size.Height)
{
position.Y = yHeight - size.Height;
}
this.position = position;
}
public Vector2 GetPosition()
{
return position;
}
public void MoveUp()
{
SetPosition(position + new Vector2(0, -moveSpeed));
}
public void MoveDown()
{
SetPosition(position + new Vector2(0, moveSpeed));
}
public virtual void UpdatePosition(Ball ball)
{
size.X = (int)position.X;
size.Y = (int)position.Y;
}
public void ResetPosition()
{
SetPosition(new Vector2(GetPosition().X, yHeight / 2 - size.Height));
}
public void GrowBat()
{
}
public void ShrinkBat()
{
size = new Rectangle(0, 0, leftBat.Width / 2, leftBat.Height / 2);
}
public virtual void Draw(SpriteBatch batch)
{
batch.Draw(leftBat, position, Color.White);
}
}
}
namespace Pong
{
using System;
using System.Diagnostics; // There for debugging purposes right now
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Media;
/// <summary>
/// This is the main type for your game
/// </summary>
public class Game1 : Microsoft.Xna.Framework.Game
{
public static GameStates gamestate;
private GraphicsDeviceManager graphics;
public int screenWidth;
public int screenHeight;
private Texture2D backgroundTexture;
private SpriteBatch spriteBatch;
private Menu menu;
private SpriteFont arial;
private HUD hud;
Animation player;
// Bats & Ball
public Bat rightBat;
public Bat leftBat;
public Ball ball;
// Scoring
private int resetTimer;
private bool resetTimerInUse;
public bool lastScored;
// All things having to do with the powerup
Powerup powerup;
SpriteFont font;
Vector2 vec;
Vector2 vec2;
Vector2 tickVec;
Vector2 activatedVec;
Vector2 deactivatedVec;
Vector2 promptVec;
Random random;
GamePadState lastState;
int tickCount;
bool powerupInitialized;
// Menus
private SoundEffect menuButton;
private SoundEffect menuClose;
public Song MainMenuSong { get; private set; }
public Song PlayingSong { get; private set; }
private Input input;
// For resetting the speed burst of the paddle
int coolDown = 0;
int disableCooldown = 0;
int powerEnableCooldown = 5000;
int powerDisableCooldown = 2000;
// Creates a new intance, which is used in the HUD class
public static Game1 Instance;
public enum GameStates
{
Menu,
Running,
Paused,
End
}
// Constructor (I'm a n00b, remember?)
public Game1()
{
graphics = new GraphicsDeviceManager(this);
Content.RootDirectory = "Content";
// Creates an instance of the class, which is used in the HUD class
Instance = this;
}
protected override void Initialize()
{
screenWidth = 1280;
screenHeight = 720;
menu = new Menu();
gamestate = GameStates.Menu;
resetTimer = 0;
resetTimerInUse = true;
lastScored = false;
graphics.PreferredBackBufferWidth = screenWidth;
graphics.PreferredBackBufferHeight = screenHeight;
graphics.IsFullScreen = true;
graphics.ApplyChanges();
ball = new Ball(Content, new Vector2(screenWidth, screenHeight));
SetUpMulti();
input = new Input();
hud = new HUD();
// Places the powerup animation inside of the surrounding box
player = new Animation(Content.Load<Texture2D>(@"gfx/powerupSpriteSheet"), new Vector2(103, 44), 64, 64, 4, 5);
// Used by for the Powerups
random = new Random();
vec = new Vector2(100, 50);
vec2 = new Vector2(100, 100);
promptVec = new Vector2(50, 25);
powerupInitialized = false;
base.Initialize();
}
protected override void LoadContent()
{
arial = Content.Load<SpriteFont>("Arial"); // for game scores
spriteBatch = new SpriteBatch(GraphicsDevice);
backgroundTexture = Content.Load<Texture2D>(@"gfx/background");
hud.LoadContent(Content);
menuButton = Content.Load<SoundEffect>(@"sfx/menuButton");
menuClose = Content.Load<SoundEffect>(@"sfx/menuClose");
MainMenuSong = Content.Load<Song>(@"sfx/getWeapon");
PlayingSong = Content.Load<Song>(@"sfx/boomer");
MediaPlayer.IsRepeating = true;
// MediaPlayer.Play(MainMenuSong); // getWeapon music
font = Content.Load<SpriteFont>("Arial"); // Used by the Powerup
}
private void PowerupActivated(object sender, PowerupEventArgs e)
{
activatedVec = new Vector2(100, 125);
}
private void PowerupDeactivated(object sender, PowerupEventArgs e)
{
deactivatedVec = new Vector2(100, 150);
//do whatever - shrink ball, paddle, slow down ball
}
private void PowerupTick(object sender, PowerupEventArgs e)
{
tickVec = new Vector2(100, 175);
tickCount++;
//for powerup like Regen, add hp
}
// Sets up single player game
private void SetUpSingle()
{
rightBat = new AIBat(Content, new Vector2(screenWidth, screenHeight), false);
leftBat = new Bat(Content, new Vector2(screenWidth, screenHeight), true);
}
// Sets up 2 player game
private void SetUpMulti()
{
rightBat = new Bat(Content, new Vector2(screenWidth, screenHeight), false);
leftBat = new Bat(Content, new Vector2(screenWidth, screenHeight), true);
}
// Increases the speed of the bats slightly after each round
private void IncreaseSpeed()
{
ball.IncreaseSpeed();
leftBat.IncreaseSpeed();
rightBat.IncreaseSpeed();
}
protected override void Update(GameTime gameTime)
{
input.Update();
player.Update(gameTime);
// Allows the game to exit
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed ||
Keyboard.GetState().IsKeyDown(Keys.Escape))
this.Exit();
GamePadState state = GamePad.GetState(PlayerIndex.One);
if (state.Buttons.RightShoulder == ButtonState.Pressed && lastState.Buttons.RightShoulder == ButtonState.Released
|| Keyboard.GetState().IsKeyDown(Keys.LeftAlt))
{
//generate a random powerup
PowerupType type = (PowerupType)random.Next(Enum.GetNames(typeof(PowerupType)).Length);
switch (type)
{
case PowerupType.BigBalls:
{
powerup = new Powerup(type, 10.0f, 1.0f);
ball.ShrinkBall();
break;
}
case PowerupType.BigPaddle:
{
powerup = new Powerup(type, 10.0f, 10.0f);
leftBat.GrowBat();
break;
}
case PowerupType.ShrinkEnemy:
{
powerup = new Powerup(type, 10.0f, 10.0f);
rightBat.ShrinkBat();
break;
}
case PowerupType.SpeedBall:
{
powerup = new Powerup(type, 10.0f, 20.0f);
ball.IncreaseSpeed();
break;
}
case PowerupType.SplitWall:
case PowerupType.ThreeBurst:
case PowerupType.Heal:
{
powerup = new Powerup(type, 1.0f, 1.0f);
hud.AddHealthP1();
break;
}
case PowerupType.Regen:
{
powerup = new Powerup(type, 20.0f, 1.0f);
break;
}
}
powerupInitialized = false;
}
else if (state.Buttons.LeftShoulder == ButtonState.Pressed &&
lastState.Buttons.LeftShoulder == ButtonState.Released ||
Keyboard.GetState().IsKeyDown(Keys.LeftControl) && Keyboard.GetState().IsKeyUp(Keys.LeftControl))
{
powerup.Activate();
}
if (powerup != null && IsActive)
{
if (!powerupInitialized)
{
powerup.Activated += PowerupActivated;
powerup.Deactivated += PowerupDeactivated;
if (powerup.Type == PowerupType.Regen)
powerup.Tick += PowerupTick;
powerupInitialized = true;
}
powerup.Update((float)gameTime.ElapsedGameTime.TotalMilliseconds);
}
lastState = state;
// What to do when the game is over
if (gamestate == GameStates.Running)
{
if (hud.currentHealthP2 < 1)
{
menu.InfoText = "Game, blouses.";
gamestate = GameStates.End;
}
else if (hud.currentHealthP1 < 1)
{
menu.InfoText = "You just let the AI beat you.";
gamestate = GameStates.End;
}
if (resetTimerInUse)
{
resetTimer++;
ball.Stop();
}
if (resetTimer == 120)
{
resetTimerInUse = false;
ball.Reset(lastScored);
resetTimer = 0;
}
// Controls movement of the bats
if (rightBat.GetType() != typeof(Pong.AIBat))
{
if (input.LeftDown) leftBat.MoveDown();
else if ((input.LeftUp)) leftBat.MoveUp();
if (input.RightDown) rightBat.MoveDown();
else if (input.RightUp) rightBat.MoveUp();
}
else if (rightBat.GetType() == typeof(Pong.AIBat))
{
if (input.LeftDown) leftBat.MoveDown();
else if ((input.LeftUp)) leftBat.MoveUp();
if (input.RightDown) leftBat.MoveDown();
else if (input.RightUp) leftBat.MoveUp();
}
// Updating ball and bat position
leftBat.UpdatePosition(ball);
rightBat.UpdatePosition(ball);
ball.UpdatePosition();
// Checking for collision of the bats
if (ball.GetDirection() > 1.5f * Math.PI || ball.GetDirection() < 0.5f * Math.PI)
{
if (rightBat.GetSize().Intersects(ball.GetSize()))
{
ball.BatHit(CheckHitLocation(rightBat));
}
}
else if (leftBat.GetSize().Intersects(ball.GetSize()))
{
ball.BatHit(CheckHitLocation(leftBat));
}
// Triggers the turbo button and cooldown
if (input.SpaceDown)
{
if (disableCooldown > 0)
{
leftBat.isTurbo = true;
coolDown = powerEnableCooldown;
leftBat.moveSpeed = 40.0f;
disableCooldown -= gameTime.ElapsedGameTime.Milliseconds;
}
else
{
leftBat.DisableTurbo();
}
}
// If spacebar is not down, begin to refill the turbo bar
else if (!input.SpaceDown)
{
leftBat.DisableTurbo();
coolDown -= gameTime.ElapsedGameTime.Milliseconds;
if (coolDown < 0)
{
disableCooldown = powerDisableCooldown;
}
}
// Makes sure that if Turbo is on, it automatically turns of. Kills it after () seconds
if(leftBat.isTurbo)
disableCooldown -= gameTime.ElapsedGameTime.Milliseconds;
if(disableCooldown < 0)
{
leftBat.isTurbo = false;
}
if (!resetTimerInUse)
{ // checks out of bounds for right side
if (ball.GetPosition().X > screenWidth)
{
resetTimerInUse = true;
lastScored = true;
hud.SubtractHealthP2();
// Checks to see if ball went out of bounds, and triggers warp sfx
ball.OutOfBounds();
leftBat.IncrementPoints();
IncreaseSpeed();
} // Checks out of bounds for left side
else if (ball.GetPosition().X < 0)
{
resetTimerInUse = true;
lastScored = false;
hud.SubtractHealthP1();
// Checks to see if ball went out of bounds, and triggers warp sfx
ball.OutOfBounds();
rightBat.IncrementPoints();
IncreaseSpeed();
}
}
}
// Navigating through the menus
else if (gamestate == GameStates.Menu)
{
if (input.RightDown || input.LeftDown)
{
menu.Iterator++;
menuButton.Play();
}
else if (input.RightUp || input.LeftUp)
{
menu.Iterator--;
menuButton.Play();
}
if (input.MenuSelect)
{
if (menu.Iterator == 0)
{
gamestate = GameStates.Running;
SetUpSingle();
menuClose.Play();
}
else if (menu.Iterator == 1)
{
gamestate = GameStates.Running;
SetUpMulti();
menuClose.Play();
}
else if (menu.Iterator == 2)
{
this.Exit();
menuClose.Play();
}
menu.Iterator = 0;
}
}
else if (gamestate == GameStates.End)
{
if (input.MenuSelect)
{
gamestate = GameStates.Menu;
hud.ResetHealth();
}
}
// Updates the HUD
hud.Update(gameTime);
base.Update(gameTime);
}
// Checking for bat collision & instructs the ball where to deflect to
private int CheckHitLocation(Bat bat)
{
int block = 0;
if (ball.GetPosition().Y < bat.GetPosition().Y + bat.GetSize().Height / 20) block = 1;
else if (ball.GetPosition().Y < bat.GetPosition().Y + bat.GetSize().Height / 10 * 2) block = 2;
else if (ball.GetPosition().Y < bat.GetPosition().Y + bat.GetSize().Height / 10 * 3) block = 3;
else if (ball.GetPosition().Y < bat.GetPosition().Y + bat.GetSize().Height / 10 * 4) block = 4;
else if (ball.GetPosition().Y < bat.GetPosition().Y + bat.GetSize().Height / 10 * 5) block = 5;
else if (ball.GetPosition().Y < bat.GetPosition().Y + bat.GetSize().Height / 10 * 6) block = 6;
else if (ball.GetPosition().Y < bat.GetPosition().Y + bat.GetSize().Height / 10 * 7) block = 7;
else if (ball.GetPosition().Y < bat.GetPosition().Y + bat.GetSize().Height / 10 * 8) block = 8;
else if (ball.GetPosition().Y < bat.GetPosition().Y + bat.GetSize().Height / 20 * 19) block = 9;
else block = 10;
return block;
}
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.Black);
// TODO: Add your drawing code here
spriteBatch.Begin();
if (gamestate == GameStates.Running)
{
// Draws background
spriteBatch.Draw(backgroundTexture, new Rectangle(0, 0, screenWidth, screenHeight), Color.White);
player.Draw(spriteBatch);
// Draws the bats and ball
leftBat.Draw(spriteBatch);
rightBat.Draw(spriteBatch);
ball.Draw(spriteBatch);
// Draws the score on screen
spriteBatch.DrawString(arial, leftBat.GetPoints().ToString(), new Vector2(screenWidth / 4 - arial.MeasureString
(rightBat.GetPoints().ToString()).X, 20), Color.White);
spriteBatch.DrawString(arial, rightBat.GetPoints().ToString(), new Vector2(screenWidth / 4 * 3 - arial.MeasureString
(rightBat.GetPoints().ToString()).X, 20), Color.White);
}
// Only draws the menu
else if (gamestate == GameStates.Menu)
{
spriteBatch.Draw(backgroundTexture, new Rectangle(0, 0, screenWidth, screenHeight), Color.White);
menu.DrawMenu(spriteBatch, screenWidth, arial);
}
else if (gamestate == GameStates.End)
{
spriteBatch.Draw(backgroundTexture, new Rectangle(0, 0, screenWidth, screenHeight), Color.White);
menu.DrawEndScreen(spriteBatch, screenWidth, arial);
}
spriteBatch.End();
// Draws the HUD
if (gamestate == GameStates.Running)
{
hud.Draw(gameTime);
}
spriteBatch.Begin();
// Powerup text
if (gamestate == GameStates.Running)
{
spriteBatch.DrawString(font, "Press A or Left Alt button to generate powerup", promptVec, Color.White);
if (powerup != null)
{
spriteBatch.DrawString(font, "Powerup Type: " + powerup.Type, vec, Color.White);
spriteBatch.DrawString(font, "Press Left Bumper or Left Ctrl to activate powerup", vec2, Color.White);
}
if (deactivatedVec != Vector2.Zero)
spriteBatch.DrawString(font, "Powerup deactivated", deactivatedVec, Color.White);
if (activatedVec != Vector2.Zero)
spriteBatch.DrawString(font, "Powerup activated", activatedVec, Color.White);
if (tickVec != Vector2.Zero)
spriteBatch.DrawString(font, "Tick count: " + tickCount.ToString(), tickVec, Color.White);
}
spriteBatch.End();
base.Draw(gameTime);
}
}
}
I bet you’re not seeing a change in the bat’s visible size, but you should be seeing a change in the bat’s hit detection. You are only changing the size of the bat. Which is used in your collision detection code. However, you don’t reference the size of the bat when drawing the bat. You’ll have to update your code to draw your bat based on it’s current size.