Rotate/animate on scroll

[atJasonCarter]

Ability to start rotation when you reach a specific point on the page, and end when you reach a second point on the page

[Stanko]

This is really easy to pull off, here, I made a live example:
https://codepen.io/stanko/pen/arjeNE

Code is really simple, listen to the scroll event, and rotate the scene when scroll is in certain range.

const minScroll = 100;
const maxScroll = 500;

window.addEventListener('scroll', () => {
  if (window.scrollY >= minScroll && window.scrollY <= maxScroll) {
    illo.rotate.y = Zdog.TAU * (window.scrollY - minScroll) / 1000;
  }
});

You might want to tweak it for your purposes, but that is the general idea.

P.S. I think that shouldn't be part of Zdog library, as it just adds feature bloat.