public void OnUpdate(float?delta = null)
{
float num1 = !delta.HasValue ? Time.deltaTime : delta.Value;
float t = this.Life / this.StartLife;
this.Life -= num1;
if ((double)this.Life <= 0.0)
{
this.gameObject.SetActive(false);
}
else
{
if (this.Type.RotationMode == ParticleType.RotationModes.SameAsDirection)
{
if (this.Speed != Vector2.zero)
{
this.Rotation = this.Speed.Angle();
}
}
else
{
this.Rotation += this.Spin * num1;
}
float num2 = this.Type.FadeMode != ParticleType.FadeModes.Linear ? (this.Type.FadeMode != ParticleType.FadeModes.Late ? (this.Type.FadeMode != ParticleType.FadeModes.InAndOut ? 1f : ((double)t <= 0.75 ? ((double)t >= 0.25 ? 1f : t / 0.25f) : (float)(1.0 - ((double)t - 0.75) / 0.25))) : Math.Min(1f, t / 0.25f)) : t;
if ((double)num2 == 0.0)
{
this.Color = new Color(Color.r, Color.g, Color.b, 0);
}
else
{
if (this.Type.ColorMode == ParticleType.ColorModes.Static)
{
this.Color = this.StartColor;
}
else if (this.Type.ColorMode == ParticleType.ColorModes.Fade)
{
this.Color = Color.Lerp(this.Type.Color2, this.StartColor, t);
}
else if (this.Type.ColorMode == ParticleType.ColorModes.Blink)
{
this.Color = RandomUtil.BetweenInterval(this.Life, 0.1f) ? this.StartColor : this.Type.Color2;
}
else if (this.Type.ColorMode == ParticleType.ColorModes.Choose)
{
this.Color = this.StartColor;
}
if ((double)num2 < 1.0)
{
this.Color = this.Color * num2;
}
}
this.Position = (this.Position + this.Speed * num1);
this.Speed = this.Speed + this.Type.Acceleration * num1;
this.Speed = Util.Approach(this.Speed, Vector2.zero, this.Type.Friction * num1);
if ((double)this.Type.SpeedMultiplier != 1.0)
{
this.Speed = this.Speed * (float)Math.Pow((double)this.Type.SpeedMultiplier, (double)num1);
}
if (!this.Type.ScaleOut)
{
return;
}
this.Size = this.StartSize * Ease.CubeOut(t);
}
}