public bool collision(GameSprite target)
{
if (target == null) return false;
Rectangle sourceRectangle = new Rectangle(
(int)position.X, (int)position.Y, image.Width, image.Height);
Rectangle targetRectangle = new Rectangle(
(int)target.position.X, (int)target.position.Y, target.image.Width, target.image.Height);
return (sourceRectangle.Intersects(targetRectangle));
}
private void UpdateGameplay(GameTime gameTime)
{
if (currentKeys.IsKeyDown(Keys.P) && oldKeys.IsKeyUp(Keys.P))
{
currentGameState = GameState.pause;
MediaPlayer.Play(PauseMusic);
MediaPlayer.Volume = 1;
}
player.position.X += GamePad.GetState(PlayerIndex.One).ThumbSticks.Left.X * 4;
if (Keyboard.GetState().IsKeyDown(Keys.Left)) player.velocity.X -= 1;
if (Keyboard.GetState().IsKeyDown(Keys.Right)) player.velocity.X += 1;
if (Keyboard.GetState().IsKeyDown(Keys.Up)) player.velocity.Y -= 1;
else if (player.position.Y < screenHeight / 2) player.velocity.Y += 0.2f;
if (Keyboard.GetState().IsKeyDown(Keys.Down)) player.velocity.Y += 1;
player.velocity *= 0.95f;
player.position += player.velocity;
if (player.position.X < 0) player.position.X = 0;
if (player.position.X > screenWidth - player.image.Width) player.position.X = screenWidth - player.image.Width;
if (player.position.Y < 0) player.position.Y = 0;
if (player.position.Y > screenHeight - player.image.Height) player.position.Y = screenHeight - player.image.Height;
gunCooldown -= gameTime.ElapsedGameTime.Milliseconds;
if (Keyboard.GetState().IsKeyDown(Keys.Space) && gunCooldown <= 0)
{
bullets.Add(new GameSprite(bulletPic, player.position + new Vector2(player.image.Width / 2, 0)));
bullets[bullets.Count() - 1].velocity.Y = -15;
shootSound.Play();
gunCooldown = MAXGUNCOOLDOWN;
}
for (int bulletNum = 0; bulletNum < bullets.Count(); bulletNum++)
{
bullets[bulletNum].position += bullets[bulletNum].velocity;
}
invulnerableTime -= gameTime.ElapsedGameTime.Milliseconds;
for (int bulletNum = 0; bulletNum < enemyBullets.Count(); bulletNum++)
{
enemyBullets[bulletNum].position += enemyBullets[bulletNum].velocity;
if (enemyBullets[bulletNum].collision(player))
{
enemyBullets.RemoveAt(bulletNum);
bulletNum--;
if(invulnerableTime<=0) PlayerDeath();
}
}
difficulty += gameTime.ElapsedGameTime.Milliseconds * difficultyIncreaseRate;
float spawnChance = 10;
if (rng.Next(0, 1000) < (difficulty / 100 * spawnChance))
{
enemies.Add(new GameSprite(baddiePic,
new Vector2(rng.Next(0, screenWidth - baddiePic.Width), -100)));
}
float bulletSpawnChance = 5;
foreach (GameSprite enemy in enemies)
{
if (rng.Next(0, 1000) < (difficulty / 100 * bulletSpawnChance))
{
GameSprite newBullet = new GameSprite(bulletPic, enemy.position);
newBullet.velocity = player.position - enemy.position;
newBullet.velocity.Normalize();
newBullet.velocity *= (6 * difficulty / 100);
enemyBullets.Add(newBullet);
}
}
for (int enemyNum = 0; enemyNum < enemies.Count(); enemyNum++)
{
enemies[enemyNum].velocity.Y = (3 * difficulty / 100);
if (enemies[enemyNum].position.X + enemies[enemyNum].image.Width/2 < player.position.X + player.image.Width/2-4) enemies[enemyNum].velocity.X = 2;
else if (enemies[enemyNum].position.X + enemies[enemyNum].image.Width / 2 > player.position.X + player.image.Width / 2+4) enemies[enemyNum].velocity.X = -2;
else enemies[enemyNum].velocity.X = 0;
enemies[enemyNum].position += enemies[enemyNum].velocity;
if (enemies[enemyNum].position.Y > screenHeight)
{
enemies.RemoveAt(enemyNum);
break;
}
}
for (int enemyNum = 0; enemyNum < enemies.Count(); enemyNum++)
{
if (enemies[enemyNum].collision(player))
{
enemies.RemoveAt(enemyNum);
enemyNum--;
if(invulnerableTime<=0) PlayerDeath();
}
}
for (int enemyNum = 0; enemyNum < enemies.Count(); enemyNum++)
{
for (int bulletNum = 0; bulletNum < bullets.Count(); bulletNum++)
{
if (enemies[enemyNum].collision(bullets[bulletNum]))
{
GameSprite newExplosion = new GameSprite(explosionImage, enemies[enemyNum].position);
newExplosion.animationframes = 6;
newExplosion.animationTimeMax = 1000;
explosions.Add(newExplosion);
enemies.RemoveAt(enemyNum);
enemyNum--;
bullets.RemoveAt(bulletNum);
bulletNum--;
baddieHitSound.Play();
score += 10;
pointsUntilNextBonusLife -= 10;
if (pointsUntilNextBonusLife <= 0)
{
lives++;
pointsUntilNextBonusLife += POINTSPERLIFE;
}
break;
}
}
}
if (score > highscore)
{
highscore = score;
}
if (lives <= 0)
{
currentGameState = GameState.gameOver;
string outputFile = "highscores.txt";
StreamWriter outputFileStream = new StreamWriter(outputFile);
outputFileStream.WriteLine(highscore);
outputFileStream.Close();
}
}
protected override void LoadContent()
{
spriteBatch = new SpriteBatch(GraphicsDevice);
baddiePic = Content.Load<Texture2D>("badguys");
Texture2D playerimage = Content.Load<Texture2D>("player");
player = new GameSprite(playerimage,
new Vector2(screenWidth / 2 - playerimage.Width / 2, screenHeight - playerimage.Height));
gameFont = Content.Load<SpriteFont>("War Hero");
hitSound = Content.Load<SoundEffect>("asplode");
BGmusic = Content.Load<Song>("POL-battle-march-long");
PauseMusic = Content.Load<Song>("PauseMusic");
MediaPlayer.IsRepeating = true;
MediaPlayer.Play(BGmusic);
MediaPlayer.Volume = 0.2f;
shootSound = Content.Load<SoundEffect>("shoot");
bulletPic = Content.Load<Texture2D>("bullet");
baddieHitSound = Content.Load<SoundEffect>("asplode2");
explosionImage = Content.Load<Texture2D>("badguyexplosion");
pauseImage = Content.Load<Texture2D>("pauseImage");
}