public bool push(Particle p)
{
//Esta llena la pila.
if (i_cima == pila.Length)
return false;
pila[i_cima] = p;
i_cima++;
return true;
}
public bool pop(out Particle p)
{
if (i_cima == 0)
{
p = null;
return false;
}
i_cima--;
p = pila[i_cima];
return true;
}
public bool enqueue(Particle p)
{
//La cola esta llena.
if ((i_frente == 0 && i_final == cola.Length - 1) || (i_final == i_frente - 1))
return false;
cola[i_final] = p;
i_final++;
if (i_final == cola.Length) i_final = 0;
count++;
return true;
}
public bool dequeue(out Particle p)
{
//La cola esta vacia.
if (i_frente == i_final)
{
p = null;
return false;
}
p = cola[i_frente];
i_frente++;
if (i_frente == cola.Length) i_frente = 0;
count--;
return true;
}
/// <summary>
/// Actualizar el estado de una particula existente
/// </summary>
private void updateExistingParticle(float elapsedTime, Particle p)
{
//Actulizo posicion de la particula.
Vector3 scaleVec = Vector3.Scale(this.speed, elapsedTime);
scaleVec.X *= p.Speed.X;
scaleVec.Y *= p.Speed.Y;
scaleVec.Z *= p.Speed.Z;
p.Position += scaleVec;
}
/// <summary>
/// Dibujar particula
/// </summary>
private void renderParticle(Particle p)
{
Device device = GuiController.Instance.D3dDevice;
//Variamos el canal Alpha de la particula con efecto Fade-in y Fade-out (hasta 20% Alpha - Normal - desde 60% alpha)
float currentProgress = 1 - (p.TimeToLive / p.TotalTimeToLive);
int alphaComp = 255;
if (currentProgress < 0.2)
{
alphaComp = (int)((currentProgress / 0.2f) * 255f);
}
else if (currentProgress > 0.6)
{
alphaComp = (int)((1 - ((currentProgress - 0.6f) / 0.4f)) * 255);
}
//Crear nuevo color con Alpha interpolado
Color origColor = Particle.DEFAULT_COLOR;
p.Color = Color.FromArgb(alphaComp, origColor.R, origColor.G, origColor.B).ToArgb();
//Render con Moduliacion de color Alpha
int color = device.RenderState.TextureFactor;
device.RenderState.TextureFactor = p.Color;
device.TextureState[0].AlphaOperation = TextureOperation.Modulate;
device.TextureState[0].AlphaArgument1 = TextureArgument.TextureColor;
device.TextureState[0].AlphaArgument2 = TextureArgument.TFactor;
particleVertexArray[0] = p.PointSprite;
device.DrawUserPrimitives(PrimitiveType.PointList, 1, particleVertexArray);
//Restaurar valor original
device.RenderState.TextureFactor = color;
}