public void GenerateExplosion(Vector2 center, float radius)
{
if (Textures.Count == 0)
throw new Exception("ExplosionParticlesLogic() -> Textures not set!");
var firesCount = Random.Next(MinNumParticles, MaxNumParticles);
for (var i = 0; i < firesCount; i++)
{
var direction = PickRandomDirection();
var scale = RandomBetween(MinScale, MaxScale);
var p = new Particle
{
Texture = Textures[Random.Next(0, Textures.Count - 1)],
Position = center,
Lifetime = RandomBetween(MinLifetime, MaxLifetime),
Velocity = RandomBetween(MinInitialSpeed, MaxInitialSpeed) * direction,
InitialScale = new Vector2(scale, scale),
Direction = direction,
Acceleration = RandomBetween(MinAcceleration, MaxAcceleration) * direction,
RotationSpeed = RandomBetween(MinRotationSpeed, MaxRotationSpeed)
};
p.Acceleration = -p.Velocity / p.Lifetime;
Particles.Add(p);
}
}
/// <summary>
/// Generates particle object that represents afterburner cloud
/// </summary>
/// <param name="startPosition">Cloud start position</param>
/// <param name="rotation">Host object rotation (to determine cloud shot direction)</param>
public void GenerateParticle(Vector2 startPosition, float rotation)
{
var p = new Particle {Texture = Textures[0], Position = startPosition, Direction = Vector2.Transform(_upDirection, Matrix.CreateRotationZ(rotation))};
//generate afterburner cloud shot direction
//set AB shot initial velocity
p.Velocity = -p.Direction * 6f;
//set AB cloud initial scale
p.Scale = Vector2.One * 0.9f;
//set time to live
p.Lifetime = 8000;
p.LogicId = LogicId;
Particles.Add(p);
OnParticleCreated(p);
}
/// <summary>
/// Generates particle object that represents laser beam
/// </summary>
/// <param name="startPosition">Beam start position</param>
/// <param name="rotation">Host object rotation (to determine beam direction)</param>
public void GenerateBeam(Vector2 startPosition, float rotation)
{
var p = new Particle { Texture = Textures[0], Position = startPosition };
//modifier for different beam spreading
var mod = _rnd.Next(1) == 0 ? -1 : 1;
//determine slightly spreaded rotation
p.Rotation = rotation + (float)_rnd.NextDouble() * .2f * mod;
//get direction from rotation radian angle
p.Direction = Vector2.Transform(_upDirection, Matrix.CreateRotationZ(p.Rotation));
//set final velocity
p.Velocity = p.Direction * 15f;
//set time to live
p.Lifetime = 8000;
p.LogicId = LogicId;
Particles.Add(p);
OnParticleCreated(p);
}
internal void OnParticleCreated(Particle p)
{
if (ParticleCreated != null)
ParticleCreated(p);
}