public void WasShot()
{
hitpoints--;
if (hitpoints <= 0)
{
IsExpired = true;
}
float hue = (float)((3 * GameRoot.GameTime.TotalGameTime.TotalSeconds) % 6);
Color color = ColorUtil.HSVToColor(hue, 0.25f, 1);
const int numParticles = 150;
float startOffset = rand.NextFloat(0, MathHelper.TwoPi / numParticles);
for (int i = 0; i < numParticles; i++)
{
Vector2 sprayVel = MathUtil.FromPolar(MathHelper.TwoPi * i / numParticles + startOffset, rand.NextFloat(8, 16));
Vector2 pos = Position + 2f * sprayVel;
var state = new ParticleState()
{
Velocity = sprayVel,
LengthMultiplier = 1,
Type = ParticleType.IgnoreGravity
};
GameRoot.ParticleManager.CreateParticle(Art.LineParticle, pos, color, 90, 1.5f, state);
}
Sound.Explosion.Play(0.5f, rand.NextFloat(-0.2f, 0.2f), 0);
}
/// <summary>
/// Handles death for the ship
/// </summary>
public void Kill()
{
// Remove a life
PlayerStatus.RemoveLife();
// Reset the position
Position = new Vector2(GameBase.ScreenSize.X / 2, GameBase.ScreenSize.Y - 10);
// Set the frames until respawn as 120 if the game is not over, and 300 if the game is over
framesUntilRespawn = PlayerStatus.IsGameOver ? 300 : 120;
// Create a yellow explosion colour
Color explosionColor = new Color(0.8f, 0.8f, 0.4f);
// Create death particles
for (int i = 0; i < 1200; i++)
{
// Define the particle speed and colour
float speed = 18f * (1f - 1 / rand.NextFloat(1f, 10f));
Color color = Color.Lerp(Color.White, explosionColor, rand.NextFloat(0, 1));
// Create a new particle state
var state = new ParticleState()
{
Velocity = rand.NextVector2(speed, speed),
Type = ParticleType.None,
LengthMultiplier = 1
};
// Create the individual particle
GameBase.ParticleManager.CreateParticle(Art.LineParticle, Position, color, 190, 1.5f, state);
}
}
public void WasShot()
{
IsExpired = true;
PlayerStatus.AddPoints(PointValue);
PlayerStatus.IncreaseMultiplier();
float hue1 = rand.NextFloat(0, 6);
float hue2 = (hue1 + rand.NextFloat(0, 2)) % 6f;
Color color1 = ColorUtil.HSVToColor(hue1, 0.5f, 1);
Color color2 = ColorUtil.HSVToColor(hue2, 0.5f, 1);
for (int i = 0; i < 120; i++)
{
float speed = 18f * (1f - 1 / rand.NextFloat(1, 10));
var state = new ParticleState()
{
Velocity = rand.NextVector2(speed, speed),
Type = ParticleType.Enemy,
LengthMultiplier = 1
};
Color color = Color.Lerp(color1, color2, rand.NextFloat(0, 1));
GameRoot.ParticleManager.CreateParticle(Art.LineParticle, Position, color, 190, 1.5f, state);
}
Sound.Explosion.Play(0.5f, rand.NextFloat(-0.2f, 0.2f), 0);
}
/// <summary>
/// Kills an enemy
/// </summary>
/// <param name="isNewLife">Checks to see whether or not the player died and the enemy needs to
/// be killed without generating new subenemies. False by default</param>
public void KillEnemy(bool isNewLife = false)
{
// Expire the entity
IsExpired = true;
// Check to see if the enemy was not killed by virtue of a new life
if (!isNewLife)
{
// Add points and increase the multiplier
PlayerStatus.AddPoints(PointValue);
PlayerStatus.IncreaseMultiplier();
// Create 2 random hues
float hue1 = rand.NextFloat(0, 6);
float hue2 = (hue1 + rand.NextFloat(0, 2)) % 6f;
// Extract the colours from the two hues
Color color1 = ColorUtil.HSVToColor(hue1, 0.5f, 1);
Color color2 = ColorUtil.HSVToColor(hue2, 0.5f, 1);
// Create a particle explosion of 120 particles
for (int i = 0; i < 120; i++)
{
// Set the particle speed
float speed = 18f * (1f - 1 / rand.NextFloat(1, 10));
// Create a new particle state
var state = new ParticleState()
{
Velocity = rand.NextVector2(speed, speed),
Type = ParticleType.Enemy,
LengthMultiplier = 1
};
// Lerp the colour between the two colours defined above
Color color = Color.Lerp(color1, color2, rand.NextFloat(0, 1));
// Create the particle
GameBase.ParticleManager.CreateParticle(Art.LineParticle, Position, color, 190, 1.5f, state);
}
// Play an explosion sound
Sound.Explosion.Play(0.5f, rand.NextFloat(-0.2f, 0.2f), 0);
// NOTE: I use different X velocities to add to the illusion of weight
// If the enemy is a large meteor, spawn in two middle meteors
if (Type == EnemyType.LargeMeteor)
{
EntityManager.Add(MiddleMeteor(Position, new Vector2(5, -6)));
EntityManager.Add(MiddleMeteor(Position, new Vector2(-5, -6)));
}
// If the enemy is a middle meteor, spawn in two small meteors
else if (Type == EnemyType.MiddleMeteor)
{
EntityManager.Add(SmallMeteor(Position, new Vector2(7, -6)));
EntityManager.Add(SmallMeteor(Position, new Vector2(-7, -6)));
EntityManager.Add(SmallMeteor(Position, new Vector2(0, 6)));
}
}
}
public static ParticleState GetRandom(float minVel, float maxVel)
{
var state = new ParticleState();
state.Velocity = rand.NextVector2(minVel, maxVel);
state.Type = ParticleType.None;
state.LengthMultiplier = 1;
return(state);
}
public override void Update()
{
var entities = EntityManager.GetNearbyEntities(Position, 250);
foreach (var entity in entities)
{
if (entity is Enemy && !(entity as Enemy).IsActive)
{
continue;
}
// bullets are repelled by black holes and everything else is attracted
if (entity is Bullet)
{
entity.Velocity += (entity.Position - Position).ScaleTo(0.3f);
}
else
{
var dPos = Position - entity.Position;
var length = dPos.Length();
entity.Velocity += dPos.ScaleTo(MathHelper.Lerp(2, 0, length / 250f));
}
}
// The black holes spray some orbiting particles. The spray toggles on and off every quarter second.
if ((GameRoot.GameTime.TotalGameTime.Milliseconds / 250) % 2 == 0)
{
Vector2 sprayVel = MathUtil.FromPolar(sprayAngle, rand.NextFloat(12, 15));
Color color = ColorUtil.HSVToColor(5, 0.5f, 0.8f); // light purple
Vector2 pos = Position + 2f * new Vector2(sprayVel.Y, -sprayVel.X) + rand.NextVector2(4, 8);
var state = new ParticleState()
{
Velocity = sprayVel,
LengthMultiplier = 1,
Type = ParticleType.Enemy
};
GameRoot.ParticleManager.CreateParticle(Art.LineParticle, pos, color, 190, 1.5f, state);
}
// rotate the spray direction
sprayAngle -= MathHelper.TwoPi / 50f;
GameRoot.Grid.ApplyImplosiveForce((float)Math.Sin(sprayAngle / 2) * 10 + 20, Position, 200);
}
public void Kill()
{
PlayerStatus.RemoveLife();
framesUntilRespawn = PlayerStatus.IsGameOver ? 300 : 120;
Color explosionColor = new Color(0.8f, 0.8f, 0.4f); // yellow
for (int i = 0; i < 1200; i++)
{
float speed = 18f * (1f - 1 / rand.NextFloat(1f, 10f));
Color color = Color.Lerp(Color.White, explosionColor, rand.NextFloat(0, 1));
var state = new ParticleState()
{
Velocity = rand.NextVector2(speed, speed),
Type = ParticleType.None,
LengthMultiplier = 1
};
GameRoot.ParticleManager.CreateParticle(Art.LineParticle, Position, color, 190, 1.5f, state);
}
}