// https://www.youtube.com/@StevesMakerspace

​

let startAng, startAng2, startAng3, ang;

let rgtAng = 1.57;

let turn = 0.2;

​

function setup() {

  createCanvas(windowWidth, windowWidth/800*600);

  blankSpots();

  background(80);

  wid = width;

  hgt = height;

  frame = width * 0.05;

  angVary = PI * 0.02;

  edgeBuff = hgt * 0.08;

  lineLength = hgt * 0.001;

  stroke(255);

  makeLines(10000,15); // number, strokeWeight scale

  stroke(220,0,0);

  makeLines(30000,5); 

  stroke(0,0,220);

  makeLines(30000,1);  

  //image(cnv2,0,0);

}

​

function blankSpots(){

  cnv2 = createGraphics(width, height);

  cnv2.background(0);

  cnv2.rectMode(CENTER);

  cnv2.rect(width / 2, height / 2, height*0.9);

}

​

function makeLines(numb,swScale) {

  newLine();

  for (i = 0; i < numb; i++) {

    ang = ang + random(-angVary, angVary);

    x = lineLength * sin(ang) + x;

    y = lineLength * cos(ang) + y;

    edges();

    sw += width * random(-0.00003, 0.00003);

    sw = constrain(sw, width * 0.0001, width * 0.009);

    strokeWeight(sw*swScale);

    line(prevX, prevY, x, y);

    prevX = x;

    prevY = y;

    if (random(1000) < 1) {

      newLine();

    }

  }

}

​

function newLine() {

  //random start ang

  newXY();

  //ang = random(PI * 2);

  ang = PI*0.5;

  if (random(2)<1){

    ang = PI*0.25;}

  else {

    ang = PI*0.75;

  }

  sw = width * random(0.0002, 0.005);

  prevX = x;

  prevY = y;

}

​

function newXY() {

  cnt = 0;

  while (cnt < 40) {

    x = round(random(frame, wid - frame));

    y = round(random(frame, hgt - frame));

    check = cnv2.get(x, y);

    if (check[0] != 0) {

      break;

    }

    cnt++;

  }

}

​

function edges() {

  front = cnv2.get(edgeBuff * sin(ang) + x, edgeBuff * cos(ang) + y);

  if (front[0] == 0) {

    ang += turn;

  }

}

​