public virtual void Update(Part particle)
{
particle.life -= Atlas.Elapsed;
particle.alpha = Math.Min(1, particle.life);
if (particle.life < 0)
particle.alive = false;
}
public void Draw(Part particle)
{
if (particle.scale > 0 && particle.alpha > 0)
{
Atlas.Graphics.DrawSprite(Atlas.Content.GetContent<Texture2D>("images/debug_arrow"),
particle.position, null,
particle.color * Math.Min(particle.alpha, 1),
new Vector2(16, 16),
particle.angle,
particle.scale, false);
}
}
public void Emit(Vector2 position)
{
alive = true;
foreach (Part p in particles)
{
if (!p.alive)
{
particleProcessor.Emit(p, position);
return;
}
}
Part pt = new Part(Atlas, particleProcessor);
particles.Add(pt);
particleProcessor.Emit(pt, position);
}
public void Emit(Part particle, Vector2 position)
{
particle.Reset();
particle.position = position;
float angle = (float)(Math.PI * 2 * Atlas.Rand);
if (strength.Max != 0 || strength.Min != 0)
{
particle.vectors[1] = new Vector2((float)Math.Cos(angle), (float)Math.Sin(angle))
* strength.ToDivision(Atlas.Rand);
}
particle.angle = (float)(Math.PI * 2 * Atlas.Rand);
particle.color = Color.Lerp(Color.White, Color.Gray, Atlas.Rand);
particle.life = _totalLife;
}
public void Update(Part particle)
{
particle.vectors[0] += _accelertation * Atlas.Elapsed;
particle.vectors[1] -= particle.vectors[1] * (drag * Atlas.Elapsed);
particle.position += (particle.vectors[0] + particle.vectors[1]) * Atlas.Elapsed;
particle.life -= Atlas.Elapsed;
particle.alpha = Math.Min(particle.life / _totalLife, (_totalLife - particle.life) / 4);
particle.scale = 2 - (particle.life / _totalLife) * (particle.life / _totalLife);
if (particle.life < 0)
particle.alive = false;
}
public virtual void Emit(Part particle, Vector2 position)
{
particle.Reset();
particle.position = position;
particle.life = 1;
}
public void Emit(Part particle, Vector2 position)
{
particle.Reset();
particle.position = position;
float angle = Atlas.Rand * (float)Math.PI * 2;
wantedAngle = wantedAngle % ((float)Math.PI * 2);
if (wantedAngle < 0) wantedAngle = wantedAngle + (float)Math.PI * 2;
while (Math.Abs(angle - wantedAngle) > (float)Math.PI) angle = angle + Math.Sign(wantedAngle - angle) * (float)Math.PI * 2;
float power = 1 - (Math.Abs(angle - wantedAngle) / ((float)Math.PI)) * wantedAngleWeight;
particle.vectors[0] = new Vector2((float)Math.Cos(angle), (float)Math.Sin(angle))
* strength.ToDivision(Atlas.Rand * power);
particle.angle = angle;
particle.color = color;
particle.life = _totalLife;
}
public void Draw(Part particle)
{
Atlas.Graphics.DrawSprite(Atlas.Content.GetContent<Texture2D>("part"),
particle.position, null, Color.White * particle.alpha, Vector2.One * 2,
particle.angle, particle.scale, false);
}
public void Update(Part particle)
{
particle.position += particle.vectors[0] * Atlas.Elapsed;
particle.life -= Atlas.Elapsed;
particle.color = color;
particle.alpha = particle.life;
particle.scale = 2 - (particle.life / _totalLife) * (particle.life / _totalLife);
if (particle.life < 0)
particle.alive = false;
}