MCNP(Monte Carlo N-particle)输入文件格式较复杂,特别是对相关物体几何参数的描写更难,不仅书写麻烦,而且很容易出错。为方便用户准确得到输入文件,进行了MCNP可视化输入程序的开发。程序运行于Windows平台下,使用VC++和OpenGL语言编译。应用该程序,用户能够在一个三维可视化环境中创建几何体并定义区域,描写数据卡,最后直接得到符合MCNP输入文件格式要求的inp文件。 MCNP (Monte Carlo N-particle) input file format is more complicated, in particular, the description of the geometric parameters of the object more difficult, not only writing troublesome, but also error-prone. In order to facilitate the user to get the input file accurately, the MCNP visual input program was developed. The program runs on the Windows platform, using VC ++ and OpenGL language compiler. With this program, users can create geometry and define areas in a 3D visualization environment, delineate data cards, and get directly in-line files that meet the requirements of the MCNP input file format.