/// <summary>
/// Adds particles to the particle emitter at the specified time interval.
/// </summary>
/// <param name="time">The elapsed time of the past frame.</param>
/// <param name="updateToggle">Makes sure that this entity only updated once per global Update() call.</param>
public override void Update(bool updateToggle)
{
if (updateToggle != HasUpdated)
{
currentTime += GraphicOptions.FrameLength;
if ((!Settings.Continuous && (currentTime > Settings.LifeSpan)) || stopped)
{
emitting = false;
}
previousPosition = Position;
base.Update(updateToggle);
if (GraphicOptions.FrameLength > 0 && Emitting)
{
velocity = (Position - previousPosition) / GraphicOptions.FrameLength;
float totalTime = extraTime + GraphicOptions.FrameLength;
float particleTime = -extraTime;
while (totalTime > Settings.IntervalBetweenParticles)
{
particleTime += Settings.IntervalBetweenParticles;
totalTime -= Settings.IntervalBetweenParticles;
float delta = particleTime / GraphicOptions.FrameLength;
Vector3 partPosition = Vector3.Lerp(previousPosition, position, delta);
if (Settings.VaryX)
{
partPosition += Vector3.UnitX * random.Next(-Settings.Radius, Settings.Radius);
}
if (Settings.VaryY)
{
partPosition += Vector3.UnitY * random.Next(-Settings.Radius, Settings.Radius);
}
if (Settings.VaryZ)
{
partPosition += Vector3.UnitZ * random.Next(-Settings.Radius, Settings.Radius);
}
particles.AddParticle(partPosition, velocity, this.Front);
}
extraTime = totalTime;
}
particles.Update();
}
}
