protected abstract bool UpdateParticle(Particle particle, GameTime time);
public void DeleteParticle(Particle particle)
{
spriteManager.DeleteSprite(particle.Sprite);
}
protected override bool UpdateParticle(Particle particle, GameTime time)
{
if (particle.SpawnTime.TotalMilliseconds + ParticleLifetime < time.TotalGameTime.TotalMilliseconds)
return false;
particle.Position.UnderlyingVector += particle.Velocity * (float)time.ElapsedGameTime.TotalSeconds;
if (InitialColor != FinalColor)
{
double fractionOfLifeLived = (double)(time.TotalGameTime - particle.SpawnTime).TotalMilliseconds / ParticleLifetime;
Color color = new Color();
color.R = Interpolate(fractionOfLifeLived, InitialColor.R, FinalColor.R);
color.G = Interpolate(fractionOfLifeLived, InitialColor.G, FinalColor.G);
color.B = Interpolate(fractionOfLifeLived, InitialColor.B, FinalColor.B);
color.A = Interpolate(fractionOfLifeLived, InitialColor.A, FinalColor.A);
particle.Color = color;
}
return true;
}