// Use a single flocking system
FlockSystem fs;

void setup() {

    // setup the environment
    size(600, 500);
    colorMode(RGB, 255, 255, 255, 100);
    smooth();
    
    // Setup the flockSystem
    fs = new FlockSystem();
    
    // Add 25 boids to start
    for (int i = 0; i < 25; i++) {
    
        // each new boid we add to the system has 3 parameters:
        //
        //  Vector3D    => Starting position
        //  4.0f        => Max velocity
        //  0.1f        => Max accelerating force
        fs.addParticle(new Boid(new Vector3D(width / 2, height / 2, 0), 4.0f, 0.1f));
    }
}

void draw() {

    background(240);
    fs.simulate();
}

void mousePressed() {

    fs.addParticle(new Boid(new Vector3D(mouseX, mouseY, 0), 5.0f, 0.1f));
}