Three.js helper function for scaling the longest side of a mesh to a certain size. This is a debug method for AR development.

scaleLongestSideToSize.js

const scaleLongestSideToSize = (mesh, size) => {
  const { x: width, y: height, z: depth } = new THREE.Box3().setFromObject(mesh).getSize();
  const longest = Math.max(width, Math.max(height, depth));
  const scale = size / longest;
  mesh.scale.set(scale, scale, scale);
}
export default scaleLongestSideToSize;