static public Entity Register(World w, Entity emitterEntity, Texture2D initTexture = null)
{
Emiter emit = emitterEntity.GetComponent <Emiter>();
Transform emitTransform = emitterEntity.GetComponent <Transform>();
Entity particle = w.CreateEntity()
.AddComponent <Transform>()
.AddComponent <Sprite>()
.AddComponent <Lifetime>()
.AddComponent <ParticleTag>();
Sprite sprite = particle.GetComponent <Sprite>();
Texture2D texture = initTexture != null ? initTexture : emit.particleTexture;
sprite.texture = texture;
sprite.size = new Vector2(1, 1);
sprite.scale = 4;
Lifetime life = particle.GetComponent <Lifetime>();
life.birth = DateTime.Now;
life.lifeInMilliseconds = emit.particleLifeTime;
Random rand = new Random();
int randomPolarDirection = rand.Next(emit.direction, emit.direction + emit.spray);
Transform transform = particle.GetComponent <Transform>();
transform.direction = polarToVector(randomPolarDirection) + emitTransform.direction;
transform.speed = emit.particleSpeed;
if (emit.type == EmiterType.Point)
{
transform.position = new Vector2(emitTransform.position.X, emitTransform.position.Y);
}
else if (emit.type == EmiterType.Sphere)
{
int radius = rand.Next(0, emit.radius);
float xComp = (float)(rand.NextDouble() * 2) - 1;
float yComp = (float)(rand.NextDouble() * 2) - 1;
Vector2 rotation = new Vector2(xComp * radius, yComp * radius);
transform.position = new Vector2(emitTransform.position.X + rotation.X, emitTransform.position.Y + rotation.Y);
}
return(particle);
}
public static void AddFireEmitter(Entity e)
{
e.AddComponent <Emiter>();
Emiter emiter = e.GetComponent <Emiter>();
emiter.particleLifeTime = 400;
emiter.particlesPerSecond = 500;
emiter.particleSpeed = 2;
emiter.spray = 90;
emiter.direction = -135;
emiter.startColor = Color.Red;
emiter.lastEmit = DateTime.Now;
emiter.type = EmiterType.Sphere;
emiter.radius = 50;
emiter.particleTexture = new Texture2D(World.GraphicsDevice, 1, 1);
emiter.particleTexture.SetData(new Color[] { emiter.startColor });
}