//The function called each time we need to emit something.
//It takes as argument "now" which represent the actual time,
//"timeSinceLastCall" which represent... you know what
//And an "out" argument (which means that IT MUST BE INITIALIZED INTO THIS FUNCTION),
//"Particles" which represents every newly created particle.
public void Emit(uint now, uint timeSinceLastCall, out Particle[] Particles)
{
//YOU ALWAYS MUST INITIALIZE Particles
Particles = new Particle[0];
if (now - lastParticleCreation < 100)
return;
Particles = new Particle[36];
lastParticleCreation = now;
//A little offset for the particles to go up and down.
Vector3D offset = new Vector3D(0, NewMath.FCos(now) / 10f, 0);
//For every particle in our array
for (int i = 0; i < 36; i++)
{
double angle = (Math.PI * 10 * i) / 180.0;
//We create the particle
Particles[i] = new Particle();
//We set the postion as null...
Particles[i].Position = new Vector3D(0, 0, 0);
//Particle.Vector represents the direction and speed of the particle.
//As you may have seen, I love cosines and sinus and here again I used
//it to create a "circle" effect
Particles[i].Vector = new Vector3D((float)Math.Cos(angle) / 5f, 0, NewMath.FSin(angle) / 5f) + offset;
//Start Vector is the same as the vector... It is useless here but serves for the affector.
Particles[i].StartVector = Particles[0].Vector;
//Start Time is now and End Time is now + 10 seconds
Particles[i].StartTime = now;
Particles[i].EndTime = now + 10000;
//Color is White and again Start Color is the same... For the same reason as Start Vector !
Particles[i].Color = Color.From(0, _rand.Next(255), _rand.Next(255), _rand.Next(255)); ;
Particles[i].StartColor = Particles[0].Color;
}
}
public void Affect(uint now, Particle[] Particles)
{
if (now - lastParticleAffect < 200)
return;
lastParticleAffect = now;
//Our color changes every second... Again cosines and sinuses !
Color col = new Color(0, (int)(Math.Cos(now) * 255),
(int)(Math.Sin(now) + Math.Cos(now) * 255 / 2),
(int)(Math.Sin(now) * 255));
//Here it is very heavy on big particle systems.
foreach (Particle part in Particles)
//We set the color
part.Color = col;
}
public void AddAffector(IParticleAffector aff)
{
OnNativeAffect del = delegate(uint now, IntPtr[] Particles, int count)
{
Particle[] array = new Particle[count];
for (int i = 0; i < array.Length; i++)
array[i] = (Particle)NativeElement.GetObject((IntPtr)Particles[i], typeof(Particle));
aff.Affect(now, array);
for (int i = 0; i < array.Length; i++)
array[i].Dispose();
array = null;
};
AntiGC.Add(del);
Particle_AddAffectorA(_raw, del);
}
