public void Update(GameTime gameTime, Player player)
{
float elapsedTime = (float) gameTime.ElapsedGameTime.TotalSeconds;
if (player.Lives > 0) // Keep spawning enemies until player runs out of lives
{
delayTimer = delayTimer.Subtract(gameTime.ElapsedGameTime);
// Spawn enemies
if (delayTimer.TotalSeconds <= 0)
{
for (int i = 0; i < rand.Next(1, 2); i++)
{
spawnChance = rand.Next(100);
if (spawnChance <= largeAsteroidChance)
{
SpawnRandomAsteroid(EnemyType.LARGE_ASTEROID);
}
else if (spawnChance >= mediumAsteroidChance && spawnChance < smallAsteroidChance)
{
SpawnRandomAsteroid(EnemyType.MEDIUM_ASTEROID);
}
else if (spawnChance >= smallAsteroidChance)
{
SpawnRandomAsteroid(EnemyType.SMALL_ASTEROID);
}
}
if (player.Score > 5000)
{
if (spawnChance < 10)
{
SpawnSpinnerGroup(0);
}
spawnDelay = 1.1F;
}
if (player.Score > 8000)
{
if (spawnChance < 15)
{
for (int i = 0; i < rand.Next(1, 3); i++)
SpawnAlien();
}
if (rand.Next(0, 50) < 10)
{
for (int i = 0; i < rand.Next(1, 2); i++)
{
Enemy armored = new Enemy(EnemyType.ARMORED, enemyTextures["ARMORED"], EnemyColor.NONE);
armored.Position = new Vector2(rand.Next(100, ActionScreen.background.Width), rand.Next(100, ActionScreen.background.Height));
enemies.Add(armored);
}
}
spawnDelay = 1F;
}
if (player.Score > 15000)
{
spawnDelay = .9F;
}
delayTimer = TimeSpan.FromSeconds(spawnDelay);
}
player.Collided = false;
// Update all enemies in the enemies list
for (int i = enemies.Count - 1; i >= 0; i--)
{
// Only update enemies that have not collided yet (Enemies that are not dead)
if (!enemies[i].Collided)
{
if (enemies[i].Type == EnemyType.SMALL_SPINNER || enemies[i].Type == EnemyType.LARGE_SPINNER)
{
if (enemies[i].OutOfViewPort(ActionScreen.background))
{
enemies[i].Collided = true;
}
}
// Collision detection for enemies and player
if (enemies[i].Bounds.Intersects(player.Bounds))
{
// Per pixel collision detection
if (!IntersectPixels(enemies[i].Transformation, enemies[i].spriteImage.Width, enemies[i].spriteImage.Height, enemies[i].TextureData,
player.Transformation, player.spriteImage.Width, player.spriteImage.Height, player.TextureData))
{
enemies[i].Collided = true;
player.Collided = true;
player.Lives -= 1;
if (player.WeaponLevel > 1)
player.WeaponLevel -= 1;
}
}
// Collision detection for enemies and bullets
for (int j = player.Bullets.Count - 1; j >= 0; j--)
{
if (!player.Bullets[j].Collided)
{
if (enemies[i].Bounds.Intersects(player.Bullets[j].Bounds))
{
if (!IntersectPixels(enemies[i].Transformation, enemies[i].spriteImage.Width, enemies[i].spriteImage.Height, enemies[i].TextureData,
player.Bullets[j].Transformation, player.Bullets[j].spriteImage.Width, player.Bullets[j].spriteImage.Height, player.Bullets[j].TextureData))
{
enemies[i].Health -= player.Bullets[j].Damage;
if (enemies[i].Health <= 0)
{
// Only "downgrade" if enemy is an asteroid
if (enemies[i].Type == EnemyType.SMALL_ASTEROID || enemies[i].Type == EnemyType.MEDIUM_ASTEROID || enemies[i].Type == EnemyType.LARGE_ASTEROID)
{
if (enemies[i].Type == EnemyType.LARGE_ASTEROID || enemies[i].Type == EnemyType.MEDIUM_ASTEROID)
{
downgradeEnemy(enemies[i]);
enemies[i].Center = new Vector2(enemies[i].spriteImage.Width / 2, enemies[i].spriteImage.Height / 2);
}
else
{
enemies[i].Collided = true;
}
}
else
{
enemies[i].Collided = true;
}
player.Score += enemies[i].PointValue;
}
player.Bullets[j].Collided = true;
ParticleManager.particleEffects["Ricoshet"].Trigger(player.Bullets[j].Position);
}
}
else
{
if (player.Bullets[j].OutOfViewPort(ActionScreen.background))
{
player.Bullets[j].Collided = true;
ParticleManager.particleEffects["Ricoshet"].Trigger(player.Bullets[j].Position);
}
}
}
if (player.Bullets[j].Collided)
{
player.Bullets.Remove(player.Bullets[j]);
}
}
// Collision detection for alien bullets with player
if (enemies[i].Type == EnemyType.ALIEN)
{
for (int j = enemies[i].EBullets.Count - 1; j >= 0; j--)
{
if (player.Bounds.Intersects(enemies[i].EBullets[j].Bounds))
{
if (!IntersectPixels(player.Transformation, player.spriteImage.Width, player.spriteImage.Height, player.TextureData,
enemies[i].EBullets[j].Transformation, enemies[i].EBullets[j].spriteImage.Width, enemies[i].EBullets[j].spriteImage.Height, enemies[i].EBullets[j].TextureData))
{
enemies[i].EBullets[j].Collided = true;
player.Lives--;
}
}
if (enemies[i].EBullets[j].Collided)
{
enemies[i].EBullets.Remove(enemies[i].EBullets[j]);
}
}
}
enemies[i].Update(gameTime, player);
}
if (enemies[i].Collided)
{
enemies.Remove(enemies[i]);
}
}
}
// Player lost
else
{
player.Collided = false;
}
Console.WriteLine("bullet list size: " + player.Bullets.Count);
}
private void SpawnSpinnerGroup(int size)
{
//List<Enemy> group = new List<Enemy>();
EnemyColor color_ = EnemyColor.NONE;
int direction = rand.Next(0, 3); // Generate a number 0 - 3 [0, 1, 2, 3] to determine what side to spawn on.
for (int i = 0; i < 15; i++)
{
Enemy enemy;
if (size == 0) // small
{
color_ = EnemyColor.PINK;
enemy = new Enemy(EnemyType.SMALL_SPINNER, enemyTextures[EnemyType.SMALL_SPINNER.ToString() + "_" + color_.ToString()], color_);
}
else
{
color_ = EnemyColor.BLUE;
enemy = new Enemy(EnemyType.LARGE_SPINNER, enemyTextures[EnemyType.SMALL_SPINNER.ToString() + "_" + color_.ToString()], color_);
}
switch (direction)
{
case 0: // Top
enemy.Position = new Vector2(rand.Next(50, ActionScreen.background.Width - 50), 50);
enemy.VY += enemy.Speed;
break;
case 1: // Bottom
enemy.Position = new Vector2(rand.Next(50, ActionScreen.background.Width - 50), ActionScreen.background.Height - 50);
enemy.VY -= enemy.Speed;
break;
case 2: // Left
enemy.Position = new Vector2(100, rand.Next(50, ActionScreen.background.Height - 50));
enemy.VX += enemy.Speed;
break;
case 3: // Right
enemy.Position = new Vector2(rand.Next(ActionScreen.background.Width + 50, ActionScreen.background.Width - 50), rand.Next(-50, ActionScreen.background.Height + 50));
enemy.VX -= enemy.Speed;
break;
}
enemies.Add(enemy);
}
}
private void SpawnAlien()
{
Enemy alien = new Enemy(EnemyType.ALIEN, enemyTextures["ALIEN"], EnemyColor.NONE);
alien.Position = new Vector2(rand.Next(100, ActionScreen.background.Width), rand.Next(100, ActionScreen.background.Height));
enemies.Add(alien);
}
private void SpawnRandomAsteroid(EnemyType eType)
{
int color = rand.Next(0, 4);
EnemyColor eColor = EnemyColor.NONE;
switch (color)
{
case 0:
eColor = EnemyColor.RED;
break;
case 1:
eColor = EnemyColor.BLUE;
break;
case 2:
eColor = EnemyColor.GREEN;
break;
case 3:
eColor = EnemyColor.PURPLE;
break;
case 4:
eColor = EnemyColor.PINK;
break;
}
Enemy enemy = new Enemy(eType, enemyTextures[eType.ToString() + "_" + eColor.ToString()], eColor);
int direction = rand.Next(0, 3); // Generate a number 0 - 3 [0, 1, 2, 3] to determine what side to spawn on.
switch (direction)
{
case 0: // Top
enemy.Position = new Vector2(rand.Next(100, ActionScreen.background.Width - 100), 100);
break;
case 1: // Bottom
enemy.Position = new Vector2(rand.Next(100, ActionScreen.background.Width - 100), ActionScreen.background.Height - 100);
break;
case 2: // Left
enemy.Position = new Vector2(100, rand.Next(100, ActionScreen.background.Height - 100));
break;
case 3: // Right
enemy.Position = new Vector2(rand.Next(ActionScreen.background.Width + 50, ActionScreen.background.Width - 50), rand.Next(-50, ActionScreen.background.Height + 50));
break;
}
enemy.Velocity += new Vector2(rand.Next(-enemy.Speed, enemy.Speed), rand.Next(-enemy.Speed, enemy.Speed));
enemy.Transformation = Matrix.CreateTranslation(new Vector3(-enemy.Center, 0.0f)) *
// Matrix.CreateScale(block.Scale) * would go here
Matrix.CreateRotationZ(enemy.Angle) *
Matrix.CreateTranslation(new Vector3(enemy.Position, 0.0f));
enemies.Add(enemy);
ParticleManager.particleEffects["WarpIn"].Trigger(enemy.Position);
}
private void downgradeEnemy(Enemy enemy)
{
enemy.getStatsForType(enemy.Type);
switch (enemy.Type)
{
case EnemyType.LARGE_ASTEROID:
enemy.Type = EnemyType.MEDIUM_ASTEROID;
enemy.spriteImage = enemyTextures["MEDIUM_ASTEROID_" + enemy.Color_.ToString()];
ParticleManager.particleEffects["LARGE_EXPLOSION_BLUE"].Trigger(enemy.Position);
break;
case EnemyType.MEDIUM_ASTEROID:
enemy.Type = EnemyType.SMALL_ASTEROID;
enemy.spriteImage = enemyTextures["SMALL_ASTEROID_" + enemy.Color_.ToString()];
ParticleManager.particleEffects["MEDIUM_EXPLOSION_PINK"].Trigger(enemy.Position);
break;
}
SoundManager.soundEffects["explosion"].Play();
}
