@thi.ng/geom/quad3.js

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

import { isNumber } from "@thi.ng/checks/is-number";
import { closestPointPlane } from "@thi.ng/geom-closest-point/plane";
import { alignmentQuat } from "@thi.ng/matrices/alignment-quat";
import { mulVQ } from "@thi.ng/matrices/mulv";
import { add3 } from "@thi.ng/vectors/add";
import { Z3 } from "@thi.ng/vectors/api";
import { Quad3 } from "./api/quad3.js";
import { __argAttribs } from "./internal/args.js";
function quad3(...args) {
  const attr = __argAttribs(args);
  return new Quad3(args.length === 1 ? args[0] : args, attr);
}
const quadOnPlane = (plane, pos, size, attribs) => {
  pos = closestPointPlane(pos, plane.normal, plane.w);
  const [w, h] = isNumber(size) ? [size, size] : size;
  const q = alignmentQuat(Z3, plane.normal);
  return new Quad3(
    [
      [-w, -h, 0],
      [w, -h, 0],
      [w, h, 0],
      [-w, h, 0]
    ].map((p) => add3(null, mulVQ(null, q, p), pos)),
    attribs
  );
};
export {
  quad3,
  quadOnPlane
};