Summary: OpenSCAD (version 2015.03-2) is the open source software for creating solid 3D CAD models. It is available for Linux/UNIX, Windows and Mac OS X, and it is a programming Solid 3D CAD Modeller. In this tutorial I will show you how to create Primitive Solids.
The Primitive Solids include cube, sphere, cylinder and polyhedron, let's start...

1）方块（cube）

创建方块有2中语法，如下：
cube(size = [x,y,z], center = true/false);
cube(size =  x ,     center = true/false);

size指定方块的边长，center指定正方体的中心是否位于座标原点。如下图：

1.1）创建正方体：cube(size =  x ,     center = true/false);

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514870704/wbvgjtmlcessyuhy2syk.png)

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514870796/atz2sy5tmeopdccnenf0.png)

1.2）创建边长不一样的长方体：cube(size = [x,y,z], center = true/false);

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514871046/vzbshcqgppuzobske2d9.png)

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514871069/mlc3jq7sdlem6g7duh0y.png)

2）球体（sphere）

创建球体可以指定半径或者直径，语法如下：
sphere(r = x);
sphere(d = x);

指定半径创建：
![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514871478/unps8rfvdudpcseyvhyg.png)

指定直径创建：
![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514871535/iziekrl2oqivjynx6tyn.png)

3）圆柱（锥，台）体（cylinder）

语法如下，当r1=r2的时候，是圆柱体；r1或者r2一个为0的时候是圆锥体；r1和r2都不为0，并且不相等的时候为圆台体；center指定物体的中心是否位于座标原点。

cylinder(h = height, r1 = BottomRadius, r2 = TopRadius, center = true/false);

圆柱体：

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514871872/is3gnjhyavbg6ucdw2fp.png)

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514871899/uotqimrfgalqsvhcsx0h.png)

圆锥体：

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514871953/khtjvi5rgzit7cnyalmy.png)

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514871975/egoo1a8e6jahkyhucovt.png)

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514872006/pvbdsekjtrn5pcwsegyg.png)

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514872026/zhtu0x66kncw17n2hxun.png)

圆台体：

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514872084/fp9t0s3nt12kwb82ygco.png)

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514872102/nxhjtigjnzxinxfi28wk.png)

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514872131/qdwthkhcpn5hcvriuqml.png)

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514872152/aoxbacu14lq7xokuw4g9.png)

通过指定内置参数$fn的数值，可以创建棱柱，棱锥和棱台体：

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514872476/c5wzny5utvybatl26sic.png)

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514872431/p2hzujoe91zdmgecybdo.png)

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514872497/aeelz6wl3r3by0eynpbw.png)

4）多面体（polyhedron）

语法如下，points指定多面体的顶点座标集，faces指定多面体每个面上顶点的索引，convexity指定在预览模式下与射线相交的最大面数。

polyhedron( points = [ [X0, Y0, Z0], [X1, Y1, Z1], ... ], faces = [ [P0, P1, P2, P3, ...], ... ], convexity = N);  

比如下面用多面体的方法创建长方体：

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514873530/fxfetokeor4kcrwmvhug.png)

![图片.png](https://res.cloudinary.com/hpiynhbhq/image/upload/v1514873574/ahpkvvjpwm4ll4fqxfxp.png)

<br /><hr/><em>Posted on <a href="https://utopian.io/utopian-io/@azcax/openscad-3d-or-openscad-tutorial-create-primitive-solids">Utopian.io -  Rewarding Open Source Contributors</a></em><hr/>