public void CreateNewParticle(Vector3 partSysPos)
{
var part = particles.New();
part.ResetParticle();
part.Alive = true;
part.Lifetime = Lifetime.GetRandomNumInRange();
part.Position = partSysPos + EmitRadius.GetRandomNumInRange();
var i = 0;
// process any initial events
foreach (var ev in Events)
{
if (ev.ActualTime == 0)
{
ev.DoItToIt(ref part);
i++;
}
}
part.CurEvent = i;
totalParticleLives++;
}
protected virtual void Emit(ParticleEmitter emitter, Particle particle)
{
Matrix transform = Matrix.CreateRotationZ(emitter.WorldRotation);
// Generating spawn position.
float emitAngle = RandomHelper.Next(0, MathHelper.TwoPi);
float emitRadius = EmitRadius.GetValue();
Vector2 p = EmitPosition.GetValue() + new Polar2(emitRadius, emitAngle).ToVector2();
// Generating initial velocity.
float initialAngle = EmitAngle.GetValue();
float initialVelocity = InitialVelocity.GetValue();
Vector2 v;
if (InitialVelocityMode == InitialVelocityMode.AwayFromCenter && p != Vector2.Zero)
{
v = Vector2.Normalize(p) * initialVelocity;
}
else
{
v = new Polar2(initialVelocity, initialAngle).ToVector2();
}
particle.Position = emitter.WorldPosition + Vector2.Transform(p, transform);
particle.Rotation = emitter.WorldRotation + InitialRotation.GetValue();
particle.Velocity = Vector2.Transform(v, transform);
particle.AngularVelocity = InitialAngularVelocity.GetValue();
particle.Duration = Duration.GetValue();
particle.Timer = 0;
particle.Scale = InitialScale.GetValue();
if (SpriteFrames != null)
{
particle.Data = RandomHelper.Next(0, SpriteFrames.Length);
}
if (ColorMode == ParticleColorMode.Random)
{
particle.Color = Colors[RandomHelper.Next(0, Colors.Length)].ToVector4();
}
else
{
particle.Color = Colors[0].ToVector4();
}
}
