@thi.ng/axidraw/registration.js

Minimal AxiDraw plotter/drawing machine controller for Node.js

import { map } from "@thi.ng/transducers/map";
import { normRange } from "@thi.ng/transducers/norm-range";
import { cartesian2 } from "@thi.ng/vectors/cartesian";
import { DOWN, MOVE, UP } from "./commands.js";
const registrationMark = ([x, y], size = 5, r = size * 0.75) => [
  // crosshair
  // horizontal
  MOVE([x - size, y]),
  DOWN(),
  MOVE([x + size, y]),
  UP(),
  // vertical
  MOVE([x, y - size]),
  DOWN(),
  MOVE([x, y + size]),
  UP(),
  // circle
  MOVE([x + r, y]),
  DOWN(),
  ...map(
    (t) => MOVE(cartesian2([], [r, t * Math.PI * 2], [x, y])),
    normRange(40)
  ),
  UP(),
  MOVE([x, y])
];
export {
  registrationMark
};