public void Add(ChangeMessage msg)
{
Messages.Add(msg);
}
public void Update(GameTime gameTime)
{
MessageBuffer.Clear();
for (int i = 0; i < ParticleDataObjects.Count; i++)
{
ParticleData gameData = ParticleDataObjects[i];
float Rot;
#region Handle particle rotation
if (gameData.RotateVelocity == true)
{
Rot = (float)Math.Atan2(gameData.Velocity.Y, gameData.Velocity.X);
}
else
{
Rot = gameData.Rotation + MathHelper.ToRadians(gameData.RotationIncrement) * ((float)gameTime.ElapsedGameTime.TotalSeconds * 60.0f);
}
#endregion
gameData.Update(gameTime);
#region Update position
Vector2 newPos = gameData.Position + gameData.Velocity;
#endregion
float percTime = gameData.CurrentTime / gameData.MaxTime;
#region Fade transparency
float transparency = gameData.StartingTransparency;
if (gameData.Fade == true)
{
transparency = MathHelper.Lerp(gameData.StartingTransparency, 0, percTime);
//transparency = gameData.StartingTransparency * (1.0f - ((1 / (gameData.MaxTime + gameData.FadeDelay)) * (gameData.CurrentTime + gameData.CurrentFadeDelay)));
}
#endregion
#region Scale particles
float newScale = gameData.CurrentScale;
if (gameData.Shrink == true && gameData.Grow == false)
{
newScale = gameData.MaxScale * (1.0f - ((1 / gameData.MaxTime) * (gameData.CurrentTime)));
}
if (gameData.Grow == true && gameData.Shrink == false)
{
newScale = gameData.MaxScale * ((1 / gameData.MaxTime) * (gameData.CurrentTime));
}
if (gameData.Shrink == true && gameData.Grow == true)
{
newScale = gameData.MaxScale * (float)Math.Sin(Math.PI * percTime);
}
#endregion
#region Fade Colours
Color newCol = Color.Lerp(gameData.StartColor, gameData.EndColor, percTime);
#endregion
//transparency = MathHelper.Lerp(gameData.StartingTransparency, 0, percTime);
ChangeMessage msg = new ChangeMessage()
{
ID = i
};
if (gameData.Active == false)
{
msg.MessageType = ChangeMessageType.DeleteRenderData;
ParticleDataObjects.Remove(gameData);
MessageBuffer.Add(msg);
i--;
}
if (gameData.CurrentTime <= gameData.MaxTime)
{
msg.MessageType = ChangeMessageType.UpdateParticle;
msg.Position = newPos;
msg.Rotation = Rot;
msg.Color = newCol;
msg.Scale = newScale;
msg.Transparency = transparency;
MessageBuffer.Add(msg);
gameData.Position = newPos;
gameData.Rotation = Rot;
}
}
}
