@thi.ng/geom/center.js

Functional, polymorphic API for 2D geometry types & SVG generation

import { DEFAULT, defmulti } from "@thi.ng/defmulti/defmulti";
import { ZERO2, ZERO3 } from "@thi.ng/vectors/api";
import { set2, set3 } from "@thi.ng/vectors/set";
import { submN } from "@thi.ng/vectors/submn";
import { Arc } from "./api/arc.js";
import { Circle } from "./api/circle.js";
import { Ellipse } from "./api/ellipse.js";
import { Sphere } from "./api/sphere.js";
import { centroid } from "./centroid.js";
import { __copyAttribs } from "./internal/copy.js";
import { __dispatch } from "./internal/dispatch.js";
import { translate } from "./translate.js";
const center = defmulti(
  __dispatch,
  {},
  {
    [DEFAULT]: ($, origin = ZERO3) => {
      const c = centroid($);
      return c ? translate($, submN(null, c, origin, -1)) : void 0;
    },
    arc: ($, origin = ZERO2) => new Arc(
      set2([], origin),
      set2([], $.r),
      $.axis,
      $.start,
      $.end,
      $.xl,
      $.cw,
      __copyAttribs($.attribs)
    ),
    circle: ($, origin = ZERO2) => new Circle(set2([], origin), $.r, __copyAttribs($.attribs)),
    ellipse: ($, origin = ZERO2) => new Ellipse(
      set2([], origin),
      set2([], $.r),
      __copyAttribs($.attribs)
    ),
    extra: ($) => $,
    sphere: ($, origin = ZERO3) => new Sphere(set3([], origin), $.r, __copyAttribs($.attribs))
  }
);
export {
  center
};