The advantages , such as easily computing form - lines and accurately lofting , are offered by mathematical ship - hull surface . hull structure modeling , engineering analyzing and manufacturing are based on mathematical ship - hull surface . furthermore , hull structure designing in virtual reality environment and intelligent building depend heavily on the ship - hull surface model 船体曲面的数学描述有着很大的优越性，如放样精确，求值(型线、肋骨线、结构线、接缝线等)方便，也是后面船体结构设计，工程分析，建造的依据，是实现智能设计、虚拟建造的先决条件。
With the knowledge of mathematical fairing and fairing procedure , we divide and classify ship data first ; then we design the database , give the tables " structure ; after the analyzing and designing of the system , we develop " ship lofting cad / cam system " with visual c + + using odbc technology . the interface of the system is friendly to users 在对船体型线光顺算法和光顺过程的充分研究的基础上，我们首先对船体数据进行分类整理；然后进行数据库设计，给出各种表结构；最后对系统功能进行分析设计，以visualc + +为开发工具，应用微软的开放数据库互连技术实现了“船体放样cad cam系统” 。
