primitive-geometry/src/quad.js

Geometries for 3D rendering, including normals, UVs and cell indices (faces). Perfect if you want to supercharge your dependency folder... with 30KB of geometries.

/** @module quad */

import { checkArguments, getCellsTypedArray } from "./utils.js";

/**
 * @typedef {object} QuadOptions
 * @property {number} [scale=0.5]
 */

/**
 * @alias module:quad
 * @param {QuadOptions} [options={}]
 * @returns {import("../types.js").SimplicialComplex}
 */
function quad({ scale = 0.5 } = {}) {
  checkArguments(arguments);

  return {
    // prettier-ignore
    positions:  Float32Array.of(
      -scale, -scale, 0,
      scale, -scale, 0,
      scale, scale, 0,
      -scale, scale, 0,
    ),
    // prettier-ignore
    normals: Int8Array.of(
      0, 0, 1,
      0, 0, 1,
      0, 0, 1,
      0, 0, 1,
    ),
    // prettier-ignore
    uvs: Uint8Array.of(
      0, 0,
      1, 0,
      1, 1,
      0, 1
    ),
    // prettier-ignore
    cells: (getCellsTypedArray(12)).of(
      0, 1, 2,
      2, 3, 0
    ),
  };
}

export default quad;