参考链接

如何快速上手

打开openSCAD后界面如下：

选择其中的examples，从basic看起。配合官方文档中的first step部分，和官方文档——代码写法即可很快上手。

概述

默认界面左边是代码，右边是预览图
Ctrl + D 可注释选中行（从edit菜单栏中得知）
以下按钮预览（鼠标停留可显示文字preview）

命令

几何体

cube(10);  //边长为10的正方体，锚点在其一角

cube([2,3,4]); //长宽高分别为2，3，4的长方体，锚点在其一角

cube(15, center=true);  //边长为15的正方体，锚点在其中心

sphere(10); //半径为10的球体

polygon( points=[[0,0],[8,4],[4,8],[4,12],[12,16],[0,20]] ); //这几个点顺次连接构成的几何体

几何变换

translate([-24,0,0])  //平移

union()  //并

intersection //交

difference() // 差

hull()  //凸包，详情请百度

例子：

linear Extrude

linear_extrude(

height = fanwidth,

center = true,

convexity = 10,

twist = -fanrot,

 slices = 20,

 scale = 1.0,

$fn = 16) {...}

minkowski() （倒角，圆角，bevel）

例一：minkowski()直接用于三维物体

height = 10;

length = 10;

width = 20;

bevelRadius = 2;

$fn=50;

cube([length-2*bevelRadius, width-2*bevelRadius,height]);

cylinder(r=bevelRadius,h=height);

translate([20,0,0])

    minkowski()

    {

      cube([length-2*bevelRadius, width-2*bevelRadius,height/2]);

      cylinder(r=bevelRadius,h=height/2);

    }

例二：minkowski()用于二维物体（之后可以叠加linear Extrude）

height = 10;

length = 10;

width = 20;

bevelRadius = 2;

linear_extrude(height = height)

    square([length-2*bevelRadius, width-2*bevelRadius]);

linear_extrude(height = height)

          circle(r=bevelRadius);

$fn=50;

translate([20,0,0])

linear_extrude(height = height)

        minkowski()

        {

          square([length-2*bevelRadius, width-2*bevelRadius]);

          circle(r=bevelRadius);

        }

效果和例一相同

projection()

projection(cut = true)

          import("projection.stl");

rotate_extrude()

绕z轴旋转360°

文字

官方文档——text用法

text(letter,

       size=size*22/30,

       font="Bitstream Vera Sans",

       halign="center",

       valign="center");

echo（字符串变量）；

会在右边控制台console中第三行左右显示

导入其他文件

import("xxx.stl");

import("projection.stl");  //

use <xxx.scad>

use <logo.scad>  //Imports the Logo() module from logo.scad into this namespace

Logo();

特殊显示（透明与高亮）

cube(15,center = true);

translate([0, 0, 20]){

    %cube(15,center = true);  //% 是透明

}

translate([0, 0, -20]){

    #cube(15,center = true);  //#是高亮

}

效果如图：

特殊变量

分辨率：$fa, $fs and $fn

The $fa, $fs and $fn special variables control the number of facets used to generate an arc:

$fa is the minimum angle for a fragment. Even a huge circle does not have more fragments than 360 divided by this number. The default value is 12 (i.e. 30 fragments for a full circle). The minimum allowed value is 0.01. Any attempt to set a lower value will cause a warning.
$fs is the minimum size of a fragment. Because of this variable very small circles have a smaller number of fragments than specified using $fa. The default value is 2. The minimum allowed value is 0.01. Any attempt to set a lower value will cause a warning.
$fn is usually 0. When this variable has a value greater than zero, the other two variables are ignored and full circle is rendered using this number of fragments. The default value is 0.

初始视角 $vpr, $vpt and $vpd

$vpr shows rotation
$vpt shows translation (i.e. won't be affected by rotate and zoom)
$vpd shows the camera distance [Note: Requires version 2015.03]

巴特西

openscad 3Dmodels 笔记