@thi.ng/axidraw/palettes.js

Minimal AxiDraw plotter/drawing machine controller for Node.js

import { isNumber } from "@thi.ng/checks/is-number";
import { illegalArgs } from "@thi.ng/errors/illegal-arguments";
import { cossin } from "@thi.ng/math/angle";
import { mix } from "@thi.ng/math/mix";
import { jitter } from "@thi.ng/vectors/jitter";
import { madd2 } from "@thi.ng/vectors/madd";
import { maddN2 } from "@thi.ng/vectors/maddn";
import { MOVE } from "./commands.js";
import { dip } from "./dip.js";
const linearPalette = (opts) => {
  const $opts = {
    pos: [0, 0],
    repeat: 1,
    jitter: 0,
    ...opts
  };
  const dipOpts = __dipOpts($opts);
  return (id) => {
    if (id < 0 || id >= $opts.num) {
      illegalArgs(`invalid palette index: ${id}`);
    }
    return [
      MOVE(
        jitter(
          null,
          maddN2([], $opts.step, id, $opts.pos),
          $opts.jitter
        )
      ),
      ...dip($opts.repeat, dipOpts)
    ];
  };
};
const radialPalette = (opts) => {
  const $opts = {
    repeat: 1,
    jitter: 0,
    startTheta: 0,
    endTheta: Math.PI * 2,
    ...opts
  };
  const radius = isNumber($opts.radius) ? [$opts.radius, $opts.radius] : $opts.radius;
  const dipOpts = __dipOpts($opts);
  return (id) => {
    if (id < 0 || id >= $opts.num) {
      illegalArgs(`invalid palette index: ${id}`);
    }
    return [
      MOVE(
        jitter(
          null,
          madd2(
            null,
            cossin(
              mix(
                $opts.startTheta,
                $opts.endTheta,
                id / $opts.num
              )
            ),
            radius,
            $opts.pos
          ),
          $opts.jitter
        )
      ),
      ...dip($opts.repeat, dipOpts)
    ];
  };
};
const __dipOpts = (opts) => ({
  down: opts.down,
  downDelay: opts.downDelay,
  up: opts.up,
  upDelay: opts.upDelay,
  commands: opts.commands
});
export {
  linearPalette,
  radialPalette
};