/// <summary>
/// Creates a new particle.
/// </summary>
/// <param name="position">The position to spawn the particle at.</param>
/// <param name="velocity">The initial velocity of the particle.</param>
/// <param name="color">A color to multiply the particle's texture by.</param>
/// <param name="sizeStart">The initial size of the particle.</param>
/// <param name="sizeEnd">The size of the particle just before dying.</param>
/// <param name="lifetime">The total lifetime of the particle in seconds.</param>
/// <param name="constrained">Set to true to constrain one of the axes used to create the quad to the particle's velocity.</param>
/// <param name="fastFade">Set to true to fade the particle in and out more quickly.</param>
public void Spawn(Vector3 position, Vector3 velocity, Color color, float sizeStart, float sizeEnd, float lifetime, bool constrained, bool fastFade)
{
// discard particle if buffer is full
if (numNew >= MAX_NEW)
{
return;
}
// create particle struct
ParticleVertex v = new ParticleVertex();
v.Position = position;
v.Velocity = velocity;
v.TimerLifetime = new Vector2(0, lifetime);
v.SizeStartEnd = new Vector2(sizeStart, sizeEnd);
v.Color = color.ToVector4();
// set the particle's flags
if (constrained)
{
v.Flags |= FLAG_CONSTRAINED;
}
if (fastFade)
{
v.Flags |= FLAG_FAST_FADE;
}
// append to buffer
this.newParticles[numNew++] = v;
}
/// <summary>
/// Creates a new particle.
/// </summary>
/// <param name="position">The position to spawn the particle at.</param>
/// <param name="velocity">The initial velocity of the particle.</param>
/// <param name="color">A color to multiply the particle's texture by.</param>
/// <param name="sizeStart">The initial size of the particle.</param>
/// <param name="sizeEnd">The size of the particle just before dying.</param>
/// <param name="lifetime">The total lifetime of the particle in seconds.</param>
/// <param name="constrained">Set to true to constrain one of the axes used to create the quad to the particle's velocity.</param>
/// <param name="fastFade">Set to true to fade the particle in and out more quickly.</param>
public void Spawn(Vector3 position, Vector3 velocity, Color color, float sizeStart, float sizeEnd, float lifetime, bool constrained, bool fastFade)
{
// discard particle if buffer is full
if (numNew >= MAX_NEW)
return;
// create particle struct
ParticleVertex v = new ParticleVertex();
v.Position = position;
v.Velocity = velocity;
v.TimerLifetime = new Vector2(0, lifetime);
v.SizeStartEnd = new Vector2(sizeStart, sizeEnd);
v.Color = color.ToVector4();
// set the particle's flags
if (constrained) v.Flags |= FLAG_CONSTRAINED;
if (fastFade) v.Flags |= FLAG_FAST_FADE;
// append to buffer
this.newParticles[numNew++] = v;
}
