var flock, cD, cN;

function setup() {
    createCanvas(640, 360);

    flock = new Flock();
    for (var i = 0; i < 100; i++) {
        flock.add();
    }
}

function draw() {
    background(51);
    flock.run();
}

function Flock() {
    this.particles = [];
}

Flock.prototype.add = function () {
    this.particles.push();
}

Flock.prototype.run = function () {
    for (var i = 0; i < this.Particle.length; i++) {
        this.particles[i].update();
        this.particles[i].edge();
        this.particles[i].connect(this.particles);
    }
}

function Particle() {
    this.velocity = createVector(random(-0.4, 0.4), random(-0.4, 0.4));
    this.location = createVector(random(0, width), random(0, height));
}

Particle.prototype.update() = function(){
    this.location.add(this.velocity);
}

Particle.prototype.edge() = function() {
    if (this.location.x > width) this.velocity.x *= -1;
    if (this.location.y > height) this.velocity.y *= -1;
    if (this.location.x < 0) this.velocity.x *= -1;
    if (this.location.y < 0) this.velocity.y *= -1;
}

Particle.prototype.dots() = function() {
    noStroke();
    fill(255, 25 + alpha);
    ellipse(this.location.x, this.location.y, 1.5 + alpha, 1.5 + alpha);
}

Particle.prototype.connect() = function(particles) {
    for (var i = 0; i < particles.length; i++) {
        var alpha = 255 - map(closestDistance, 0, 51, 0, 255);
        var d = p5.Vector.dist(this.location, particle[i].location);

        if (boids[i] == this) {
            continue;
        }

        if (d < cD) {
            cD = d;
            cN = particles[i];
        }

        if (d < 51) {

            stroke(255, alpha);
            strokeWeight(0.1 + alpha * 0.003);
            line(this.location.x, this.location.y, particle[i].location.x, particle[i].location.y);
        }
    }

    alphaDbl = alpha * 2;
    alphaX = alpha*0.003;

    if (closestDistance < 112) {
        this.display(alphaDbl, alphaX);
        closestDistance = 10000;
    }
}