How to scale all meshes of various scales to a unit scale

Question

I have a few objects with different scales i want to make a scene where all objects are scaled proportionally to everything else, something like a normalize function for a mesh.

How would I go about doing this? I have thought about traversing all the vertices, finding the min and maximum and dividing all vertices by the maximum?

I have also thought of traversing all vertices and normalizing them one by one, but I'm not sure it would solve it?

Edit: to reword the question, I want a door and a cup to be the same size. obviously a door will be much bigger than a cup, but I want to scale both such that they fit within a unit cube or a unit sphere.

Edit2: I want to achieve exactly this effect from the Nvidia Omniverse demo at around 1:17 he talks about the mesh and then proceeds to say that they normalize it. how do they do it!

Answer 1

This is just simple division.

public static void ScaleLongestAxis(MeshFilter filter, float targetSize = 1f) {
   var size = filter.sharedMesh.bounds.size;
   float longest = Mathf.Max(size.x, size.y, size.z);
   float scaleFactor = targetSize/longest;
   filter.transform.localScale = new Vector3(scaleFactor, scaleFactor, scaleFactor);
}