Simple Box

Project Overview: 3D Open-Top BoxThis script generates a rectangular container designed for 3D printing or CNC modeling. The design focuses on material efficiency and structural integrity for thin-walled objects.1. Physical DimensionsExternal Dimensions: The box measures 150 mm (Width) by 120 mm (Depth) with a total Height of 60 mm.Wall Thickness: Set at 0.8 mm. This is a strategic choice for 3D printing; since most standard nozzles are $0.4$ mm, a $0.8$ mm wall represents exactly two perimeters (walls), making the print faster and structurally sound without unnecessary infill.2. Geometry Logic (The difference() Function)The code uses a "Constructive Solid Geometry" (CSG) approach:Outer Volume: A solid cube is created using the primary dimensions ($150 \times 120 \times 60$).Inner Cavity: A second, slightly smaller cube is subtracted from the first.Translation: The inner cube is shifted by $0.8$ mm (the wall variable) on the X, Y, and Z axes. This ensures the bottom of the box