@thi.ng/matrices/viewport.js

Matrix & quaternion operations for 2D/3D geometry processing

import { mulM23 } from "./mulm.js";
import { scale23 } from "./scale.js";
import { translation23 } from "./translation.js";
const viewport = (out, left, right, bottom, top) => {
  const x = (left + right) / 2;
  const y = (bottom + top) / 2;
  const w = (right - left) / 2;
  const h = (top - bottom) / 2;
  return mulM23(null, translation23(out, [x, y]), scale23([], [w, h]));
};
export {
  viewport
};