The MCNP Visual Editor is built on a C++ front end that calls native MCNP Fortran routines, ensuring that what you see in the GUI is exactly what the transport code will execute.
To understand the value of the Visual Editor (often referred to as ), one must first appreciate the inherent difficulty of native MCNP input files. MCNP operates on a Constructive Solid Geometry (CSG) system. In a standard text input, users define surfaces (planes, cylinders, spheres) and then define "cells" (volumes of space) by describing the intersection, union, and complement of those surfaces. Mcnp Visual Editor
