OpenSCAD

OpenSCAD 是一款用于创建实体 3D CAD 模型的软件。它是一款免费软件，适用于 Linux/UNIX、Windows 和 Mac OS X。与大多数用于创建 3D 模型的免费软件（如 Blender）不同，它不关注 3D 建模的艺术方面，而是关注 CAD 方面。因此，当您计划创建机器零件的 3D 模型时，它可能就是您正在寻找的应用程序，但当您对创建计算机动画电影更感兴趣时，它肯定不是您正在寻找的应用程序。
OpenSCAD 不是交互式建模器。相反，它类似于 3D 编译器，可读取描述对象的脚本文件并从该脚本文件渲染 3D 模型。这使您（设计师）可以完全控制建模过程，并使您能够轻松更改建模过程中的任何步骤或进行由可配置参数定义的设计。
OpenSCAD 提供两种主要建模技术：第一是构造实体几何（又名 CSG），第二是 2D 轮廓挤压。 Autocad DXF 文件用作此 2D 轮廓的数据交换格式。除了挤压的 2D 路径外，还可以从 DXF 文件中读取设计参数。除了 DXF 文件外，OpenSCAD 还可以读取和创建 STL 和 OFF 文件格式的 3D 模型。

OpenSCAD is a software for creating solid 3D CAD models. It is free software and available for Linux/UNIX, Windows and Mac OS X. Unlike most free software for creating 3D models (such as Blender) it does not focus on the artistic aspects of 3D modelling but instead on the CAD aspects. Thus it might be the application you are looking for when you are planning to create 3D models of machine parts but pretty sure is not what you are looking for when you are more interested in creating computer-animated movies.
OpenSCAD is not an interactive modeller. Instead it is something like a 3D-compiler that reads in a script file that describes the object and renders the 3D model from this script file. This gives you (the designer) full control over the modelling process and enables you to easily change any step in the modelling process or make designs that are defined by configurable parameters.
OpenSCAD provides two main modelling techniques: First there is constructive solid geometry (aka CSG) and second there is extrusion of 2D outlines. As data exchange format format for this 2D outlines Autocad DXF files are used. In addition to 2D paths for extrusion it is also possible to read design parameters from DXF files. Besides DXF files OpenSCAD can read and create 3D models in the STL and OFF file formats.