scroll test

function setup() {

  createCanvas(windowWidth, windowHeight);

}

​

let pos = 25;

​

function draw() {

  background(color('#f5f5f5'));

  fill(0);

  triangle(30, 75, pos, 20, 86, 75);

  describe(`black 50-by-50 rect moves up and down with vertical scroll.

    fuchsia background`);

}

​

function mouseWheel(event) {

  print(event.delta);

  //move the square according to the vertical scroll amount

  if(event.delta>0){pos += sqrt(abs(event.delta));}

  else{pos -= sqrt(abs(event.delta));}

  //uncomment to block page scrolling

  //return false;

}