Development of three-dimensional geometry visualization tool for the Monte Carlo radiation transport simulation

General-purpose three-dimensional Monte Carlo radiation transport calculation codes have been used in a variety of fields, including treatment planning, activation calculations, and radiation shielding. However, their built-in visualization functions are relatively limited, and few visualization tools enable users to manipulate viewpoints interactively in three dimensions. Therefore, I developed Gxsivew, a three-dimensional real-time visualization tool with a modern graphical user interface, as well as a web application version that runs on a web browser. Furthermore, efforts are being made to integrate virtual reality technology with controllers and a head-mounted display, aiming to expand the scope of the application program. This report describes this visualization tool's history, details, and future directions. (author)