Originally software for Computer-Ai

Originally software for Computer-Aided Design systems was developed with computer languages such as Fortran, but with the advancement of object-oriented programming methods this has radically changed. Typical modern parametric feature based modeler and freeform surface systems are built around a number of key C (programming language) modules with their own APIs. A CAD system can be seen as built up from the interaction of a graphical user interface (GUI) with NURBS geometry and/or boundary representation (B-rep) data via a geometric modeling kernel.
Some software packages provide the ability to edit parametric and non-parametric geometry without the need to understand the design intent history of the geometry by use of direct modeling functionality. This ability may also include the additional ability to infer the correct relationships between selected geometry (e.g., tangency, concentricity) which makes the editing process less time and labor intensive while still freeing the engineer from the burden of understanding the model’s design intent history. These kind of non history based systems are called Explicit Modellers. The first Explicit Modeling system was introduced to the world at the end of 80's by Hewlett-Packard under the name SolidDesigner. This CAD solution, which released many later versions, is now sold by PTC as "CoCreate Modeling"
Draft views are able to be generated easily from the models. Assemblies usually incorporate tools to represent the motions of components, set their limits, and identify interference. The tool kits available for these systems are ever increasing; including 3D piping and injection mold designing packages.

Results (English) 3:

最初的计算机辅助设计系统软件开发与计算机语言如Fortran语言，但面向对象程序设计方法的进步已经彻底改变了。典型的现代参数化特征建模和曲面系统是建立在一系列关键C（语言）与自己的API模块。一个CAD系统可以看作是由一个图形用户界面（GUI）的相互作用与NURBS几何和/或边界表示（B-REP）通过几何建模内核数据。
一些软件包提供编辑参数和非参数化几何不需要利用直接建模功能的几何设计意图的理解历史的能力。这种能力也可以包括推断正确选择几何关系的附加功能（例如，相切，同心度）使得编辑过程更少的时间和劳动密集型的同时还使工程师从认识模型的设计意图的历史负担。这种非历史中被称为显式模型。第一个明确的建模系统被介绍到世界80年代末由休利特帕卡德的名字soliddesigner下。该CAD解决方案，并发布了很多版本，现在销售的PTC“CoCreate建模”
草案意见能够很容易从模型。组件通常包括工具来表示构件的运动，他们的极限，识别干扰。这个工具可以为这些系统不断增加；包括三维配管及注塑模具设计的软件包。