Perlin noise mod

[mwcz]

Flow Field, by Harvey Moon. Found this on the p5js homepage. Would make a GREAT mod for kimotion.

var particles = [];
var mouse;

var colorA;
var colorB;
var colorC;
var colorD;

function setup() {
    mouse = createVector(mouseX,mouseY);
    createCanvas(windowWidth,windowHeight);
    MnowPos = createVector(500,500);
    Macc = createVector(2,-2);
    noStroke();
    fill(0);
    rectMode(CENTER);
    background(255);
    colorA = color(48,222,179);
    colorB = color(221,166,232);
    colorC = color(145,162,  0);
    colorD = color(196,195,195);
}
function draw() {
    mouse.set(mouseX,mouseY)
    for(var i = 0; i < particles.length; i++){
        particles[i].update();
        particles[i].draw();
        var noiseRot = map(noise(particles[i].nowPos.x * .006 ,particles[i].nowPos.y * .006), .2, .8, 0, PI*2 );
        particles[i].acc.set(cos(noiseRot)*3,sin(noiseRot)*3);
    }
    if(particles.length < 500){
        MnowPos.set(mouse);
        MnowPos.add(random(-10,10), random(-10,10) );
        var mLoc = int(map(mouseX,0,width,0,4));
        if(mLoc == 0){
            particles[i] = new Particle(MnowPos,Macc,colorA);
        }
        else if(mLoc == 1){
            particles[i] = new Particle(MnowPos,Macc,colorB);
        }
        else if(mLoc == 2){
            particles[i] = new Particle(MnowPos,Macc,colorC);
        }
        else if(mLoc == 3){
            particles[i] = new Particle(MnowPos,Macc,colorD);
        }
    }
    for(var j = 0; j < particles.length; j++){
        if(particles[j].nowPos.x>=width-10 || particles[j].nowPos.x <= 10 || particles[j].nowPos.y>=height-10 || particles[j].nowPos.y <= 10  || particles[j].lifeCount <= 0){
            particles.splice(j,1);
            //println("kill : " + j);
        }
    }
}

function Particle ( posN, accN, colorIn){
    this.nowPos=createVector(posN.x,posN.y);
    this.acc = createVector(accN.x, accN.y);
    this.lifeCount = random(100,400);
    this.colorN = colorIn;
}

Particle.prototype.update = function(){
    this.lifeCount--;
    this.nowPos.add(this.acc);
}

Particle.prototype.draw = function(){
    fill(this.colorN);
    ellipse(this.nowPos.x,this.nowPos.y,2,2);
}