Engine v2.1

Engine v2.1

Additions and fixes on top of v2. Books made with v2 need no change.

Picture books

• Scenes can draw through a beat's last 0.6 s hold: clockRun(f, D, { tail: true }), used by the picture-book kit's stopClock. A camera follows when its step has a tail. With an older engine the option is ignored and the hold stands still, as before.
• After a film ends, Space, Enter and R replay or go on to the next episode, and the arrows still step back. The help no longer lists lesson-only keys.

Look

• A book can set its board colours with a plain :root in its book.css (stage, cards, bar, volume and COL follow), so a light board needs no hand overrides. A commented example is in engine/book.css. The default dark look is unchanged.

Questions

• Answer boxes accept $60, 5 €, 1,250 and thousands grouped with spaces.
• ?beat=N on a question no longer swallows Space; the answer box takes focus once the lesson plays.
• Enter after a chapter's last question opens the next chapter.

Drawing

• draw, show and hide take an ease. Chapters that already passed one now ease as written.
• A transform set on a path() is kept until the element first moves.

Syncing

engine.py in the Skill now syncs from the latest compatible release, engine-v2.1. A new major number still means books may need a change.