protected virtual ParticleT createParticle(float elepsedS)
{
float percentage = this.calculateEmitterPercentage();
// Calculate the lifetime
float lifetime = 1f;
if (this.AverageLifetimes.Length == 1)
{
lifetime = this.AverageLifetimes[0].Value;
}
else
{
int i = this.AverageLifetimes.GetToIndex(percentage);
lifetime = GameMath.Lerp(this.AverageLifetimes[i - 1].Value, this.AverageLifetimes[i].Value, AverageLifetimes.GetLerpFactor(i, percentage));
}
lifetime = (float)GlobalRandom.Rand(this.Distribution, lifetime, this.LifeTimeDeviation);
// Adjust the scales
PercentageArray <float> scales = this.ScalePercentages.Clone();
if (ScaleDiesToo)
{
float factor = lifetime / this.AverageLifetimes[0].Value;
for (int i = 0; i < scales.Length; i++)
{
scales[i].Value = scales[i].Value * factor;
}
}
// Adjust the alphas
PercentageArray <float> alphas = this.AlphaPercentages.Clone();
if (AlphaDiesToo)
{
float factor = lifetime / this.AverageLifetimes[0].Value;
for (int i = 0; i < alphas.Length; i++)
{
alphas[i].Value = alphas[i].Value * factor;
}
}
// Create the particle
ParticleT particle = this.createParticle(elepsedS, lifetime, scales, alphas);
return(particle);
}
public virtual void Draw(UpdateEventArgs e)
{
// Don't draw dead particles
if (timeLeft <= 0)
{
return;
}
// Calculate the colour
Color color = Color.White;
float pct = 100f * (1f - this.timeLeft / this.lifeTime);
if (this.colorPercentages.Length == 1)
{
color = this.colorPercentages[0].Value;
}
else
{
int i = this.colorPercentages.GetToIndex(pct);
color = GameMath.Lerp(this.colorPercentages[i - 1].Value, this.colorPercentages[i].Value, colorPercentages.GetLerpFactor(i, pct));
}
// Calculate the scale
float scale = 1f;
if (this.scalePercentages.Length == 1)
{
scale = this.scalePercentages[0].Value;
}
else
{
int i = this.scalePercentages.GetToIndex(pct);
scale = GameMath.Lerp(this.scalePercentages[i - 1].Value, this.scalePercentages[i].Value, scalePercentages.GetLerpFactor(i, pct));
}
// Calculate the alpha
float alpha = 1f;
if (this.alphaPercentages.Length == 1)
{
alpha = this.alphaPercentages[0].Value;
}
else
{
int i = this.alphaPercentages.GetToIndex(pct);
alpha = GameMath.Lerp(this.alphaPercentages[i - 1].Value, this.alphaPercentages[i].Value, alphaPercentages.GetLerpFactor(i, pct));
}
// Draw the sprite
color.A = (byte)(255 * alpha);
this.draw(this.position, scale, color);
}
