const HEIGHT = 800;

​

const NB_POINTS = 800;

const LEN_PATH = 20;

​

const MIN_DISTANCE = 25;

const MAX_DISTANCE = 75;

​

const MAX_TRIES = 400;

​

let points = [[WIDTH/2, HEIGHT]];

​

let path = [0];

​

function computeDistance(p1, p2) {

  return sqrt(pow(p2[0] - p1[0], 2) + pow(p2[1] - p1[1], 2));

}

​

​

​

function setup() {

  createCanvas(WIDTH, HEIGHT);

​

  for (let i = 0; i < NB_POINTS; i++) {

    points.push([random() * WIDTH, random() * HEIGHT])

  } 

  for (let i = 0; i < LEN_PATH; i++) {

    let nbTries = 0;

    while (true) {

      if (nbTries > MAX_TRIES) {

        console.log("not found")

        path.push(int(random() * NB_POINTS));

        nbTries = 0;

        break;

      }

      let drawn = int(random() * NB_POINTS);

      //console.log(points[drawn][1])

      //console.log(points[path[i]][1]);

        if (points[drawn][1] < points[path[i]][1]) {

          //console.log(points[drawn])

                 let dist = computeDistance(points[drawn], points[path[i]]);

          //console.log(dist);

          if (dist > MIN_DISTANCE && dist < MAX_DISTANCE) {

            path.push(drawn);

            nbTries = 0;

            break;

          }

        }

      nbTries += 1;

    }

​

  }

}

​

​

​

​

​

​

function draw() {

  background(220);

  stroke(30, 30, 100);

  strokeWeight(5);

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

    point(points[i][0], points[i][1]);

  }

  stroke(60,60, 250);

  strokeWeight(3);

    for (let i = 0; i < path.length - 1; i++) {

    let p1 = points[path[i]];

    let p2 = points[path[i + 1]];

    line(p1[0], p1[1], p2[0], p2[1]);

  }

    stroke(255,0, 0);

  strokeWeight(5);

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

    point(points[path[i]][0], points[path[i]][1]);

  }

}