​

let restLength = 75;

let pullstepdiv = 10; //how much to divide the steps taken each frame

​

class Node {

  constructor(x,y,id,links){

    this.pos = createVector(x,y)

    this.links = links;

  }

  drawLinks(){

    for(let i=0;i<this.links.length;i++){

      line(this.pos.x,this.pos.y,rhiz[this.links[i]].pos.x,rhiz[this.links[i]].pos.y);

    }

  }

  pushPull(){

    let move = createVector(0,0)

    for(let i=0;i<this.links.length;i++){

      let p = createVector( rhiz[this.links[i]].pos.x,rhiz[this.links[i]].pos.y );

      move.add( p5.Vector.mult( 

        p5.Vector.sub(this.pos, p), // the vector towards the linked node

        (restLength / p5.Vector.dist(this.pos, p)) - 1.0 ) // how close the current lengh is to the rest length

      );

    }

    move.div(this.links.length*pullstepdiv)

    this.pos.add(move);

  }

}

​

class Leaf extends Node {

  constructor(x,y,id,links){

    super(x,y,id,links);

  }

}

​

class Stem extends Node {

  constructor(x,y,id,links){

    super(brand);

  }

  grow(){

    if(random()>0.9)

  }

}

​

function setup() {

  createCanvas(400, 400);

  // random test network w 3 links each

  for(let i=0; i<10; i++){

    rhiz.push(new Node(

      random()*width, 

      random()*height, 

      i, 

      [floor(random()*10), floor(random()*10), floor(random()*10)]));

  }

}

​

function draw() {

  background(255);

  rhiz[0].pos = createVector(mouseX,mouseY)

  for(let i=1;i<rhiz.length;i++){

    rhiz[i].pushPull();

  }

  for(let i=0;i<rhiz.length;i++){

    rhiz[i].drawLinks();

  }

}