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The OpenSCAD language is more convenient to code by humans. The CSG format is a subset of SCAD that has fewer primitives. For instance, `rotate() mirror() translate() scale() resize()` in SCAD are all represented by `multmatrix()` in CSG.
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The following list of OpenSCAD features from the [https://www.openscad.org/cheatsheet/](https://www.openscad.org/cheatsheet/) show what is currently supported. Note that **Supported** :
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* Includes features that are display-only and do not affect MFiX boundaries condition (such as `color`, `$fa`, etc.).
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* Sometimes means that the SCAD object is exported to a supported CSG object, even if the `mfix-parser` code doesn't deal with the feature directly (`rotate()` to `mulmatrix()` for example.)
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The following is a WIP and will be updated as new features are added to the CSG parser.
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# Key
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:sunny: Supported (or irrelevant to exported CSG)\
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:partly_sunny: Partially supported\
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:thunder_cloud_rain: Unsupported
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# Syntax
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| **Feature** | **Status** |
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| ------------|:-----------:|
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| var | :sunny: |
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| module | :sunny: |
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| function | :sunny: |
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| include | :sunny: |
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| use | :sunny: |
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# Constants
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| **Feature** | **Status** |
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| ------------|:----------:|
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| undef | :sunny: |
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| PI | :sunny: |
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# Special Variables
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| **Feature** | **Status** |
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| ------------|:----------:|
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| $fa | :sunny: |
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| $fs | :sunny: |
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| $fn | :sunny: |
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| $t | :sunny: |
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| $vpr | :sunny: |
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| $vpt | :sunny: |
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| $children | :sunny: |
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| $preview | :sunny: |
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# Modified Characters
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| **Feature** | **Status** |
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| ------------|:----------:|
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| * | :sunny: |
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| ! | :sunny: |
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| # | :sunny: |
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| % | :sunny: |
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# 2D
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| **Feature** | **Status** | **Note** | **Estimated Effort Left** |
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| -------------------------- |:--------------------:|:-----------------------------|:--------------------------|
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| circle | :sunny: | | |
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| square | :sunny: | | |
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| polygon | :sunny: | | |
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| text | :thunder_cloud_rain: | creates text as a 2D obj | unknown |
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| import | :sunny: | | |
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| projection | :thunder_cloud_rain: | project 3D obj to xy plane | unknown |
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# 3D
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| **Feature** | **Status** | **Note** | **Estimated Effort Left** |
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| -----------------|:--------------------:|:------------------------------- |:--------------------------------|
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| sphere | :sunny: | | |
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| cube | :sunny: | | |
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| cylinder(r1, r2) | :sunny: | cone supported | |
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| polyhedron | :sunny: | | |
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| linear_extrude | :partly_sunny: | twist, scale unsupported | unknown |
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| rotate_extrude | :partly_sunny: | angle unsupported | couple of days |
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| surface | :thunder_cloud_rain: | reads Heightmap info from files | unknown |
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# Transformations
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| **Feature** | **Status** | **Note** | **Estimated Effort Left** |
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| ------------|:--------------------:|:----------------------------------------|:------------------------- |
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| translate | :sunny: | | |
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| rotate | :sunny: | | |
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| scale | :sunny: | | |
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| resize | :thunder_cloud_rain: | modifies size to given x,y,z | unknown |
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| mirror | :sunny: | | |
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| multmatrix | :sunny: | | |
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| color | :sunny: | | |
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| offset | :thunder_cloud_rain: | new 2d outline from an existing outline | unknown |
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| hull | :thunder_cloud_rain: | creates convex hull | unknown |
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| minkowski | :thunder_cloud_rain: | creates minkowski sum of 2 objs | unknown |
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# Boolean Operations
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| **Feature** | **Status** |
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| -------------|:----------:|
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| union | :sunny: |
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| intersection | :sunny: |
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| difference | :sunny: |
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# List Comprehensions
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| **Feature** | **Status** |
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| -------------|:----------:|
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| Generate | :sunny: |
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| Flatten | :sunny: |
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| Conditions | :sunny: |
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| Assignments | :sunny: |
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# Flow Control
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| **Feature** | **Status** |
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| -----------------|:----------:|
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| for | :sunny: |
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| intersection_for | :sunny: |
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| if | :sunny: |
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| let | :sunny: |
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# Type test functions
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| **Feature** | **Status** |
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| ------------|:----------:|
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| is_undef | :sunny: |
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| is_bool | :sunny: |
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| is_num | :sunny: |
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| is_string | :sunny: |
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| is_list | :sunny: |
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# Other
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| **Feature** | **Status** |
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| ------------|:----------:|
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| echo | :sunny: |
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| render | :sunny: |
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| children | :sunny: |
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| assert | :sunny: |
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# Mathematical
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| **Feature** | **Status** |
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| ------------|:----------:|
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| abs | :sunny: |
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| sign | :sunny: |
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| sin | :sunny: |
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| cos | :sunny: |
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| tan | :sunny: |
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| acos | :sunny: |
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| asin | :sunny: |
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| atan | :sunny: |
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| atan2 | :sunny: |
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| floor | :sunny: |
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| round | :sunny: |
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| ceil | :sunny: |
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| ln | :sunny: |
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| len | :sunny: |
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| let | :sunny: |
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| log | :sunny: |
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| pow | :sunny: |
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| sqrt | :sunny: |
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| exp | :sunny: |
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| rands | :sunny: |
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| min | :sunny: |
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| max | :sunny: |
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| norm | :sunny: |
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| cross | :sunny: | |
