(Fast Rendering) Rounded Cube Module for OpenSCAD

rounded_cube() is a module for creating cuboids with rounded edges in OpenSCAD

The key feature of this particular rounded cube module is that it is significantly faster to render than using the hull() transformation and a bunch of spheres.
This module calculates the position of each vertex and uses them to form a polyhedron(). This method is waaaaay faster for both preview and rendering.

rounded_square(size=[7,8,9], r=1, center=false, convexity=2);