public ParticleSystem(Game game)
: base(game)
{
//content = new ContentManager(game.Services);
content = game.Content;
settings = new ParticleSystemSettings();
}
internal void Initialize(ParticleSystemSettings settings, bool makeAlive)
{
Age = 0;
IsAlive = makeAlive;
Vector3 minPosition = (settings.EmitPosition - (settings.EmitRange * .5f));
Vector3 maxPosition = (settings.EmitPosition + (settings.EmitRange * .5f));
Vector3 position = Utility.GetRandomVector3(minPosition, maxPosition);
Vertex.Position = position;
if (settings.EmitRadius != Vector2.Zero)
{
float angle = Utility.GetRandomFloat(0, MathHelper.TwoPi);
Vertex.Position = new Vector3(
position.X + (float)Math.Sin(angle) * settings.EmitRadius.X,
position.Y,
position.Z + (float)Math.Cos(angle) * settings.EmitRadius.Y);
}
velocity = Utility.GetRandomVector3(
settings.MinimumVelocity, settings.MaximumVelocity);
acceleration = Utility.GetRandomVector3(
settings.MinimumAcceleration, settings.MaximumAcceleration);
lifetime = Utility.GetRandomFloat(
settings.MinimumLifetime, settings.MaximumLifetime);
if (settings.DisplayColorsInOrder)
{
Vertex.Color = settings.Colors[0];
ColorChangeRate = lifetime / settings.Colors.Length;
}
else
{
Vertex.Color =
settings.Colors[Utility.GetRandomInt(0, settings.Colors.Length)];
}
//Vertex.PointSize = Utility.GetRandomFloat(
// settings.MinimumSize, settings.MaximumSize);
externalForce = settings.ExternalForce;
}
/// <summary>
/// Allows the game component to perform any initialization it needs to before starting
/// to run. This is where it can query for any required services and load content.
/// </summary>
public override void Initialize()
{
settings = InitializeSettings();
particles = new Particle[settings.Capacity];
//vertices = new VertexPointSprite[settings.Capacity];
vertices = new VertexPositionColor[settings.Capacity];
for (int i = 0; i < settings.Capacity; i++)
{
particles[i] = new Particle();
particles[i].Initialize(settings, false);
}
numberOfActiveParticles = 0;
base.Initialize();
}
internal void Initialize(ParticleSystemSettings settings)
{
Initialize(settings, true);
}