Founding Mathematical Model of Half Mediating Horizontal Supporter Entity with AutoCADR12.0

This paper mainly introduces the process of modeling that carries out the design about the model of entity using the second development system of AutoCAD by means of language C. It includes the analysis of entity modeling and achievement of model. During the modeling, the coordinate transformation of key point and the basis commands of 3-D entity model conform to some specific standard of AOS language and AutoCAD software. The achievement of data and foundation of mathematical model is more complicated than others.