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update doc

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Justin Lin 2021-02-13 18:15:28 +08:00
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docs/lib3x-arc.md
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@ -6,7 +6,7 @@ Creates an arc. You can pass a 2 element vector to define the central angle. Its
- `radius` : The radius of the circle.
- `angle` : A single value or a 2 element vector which defines the central angle. The first element of the vector is the beginning angle in degrees, and the second element is the ending angle.
- `width` : The width of the arc.
- `width` : The width of the arc. Default to 1.
- `width_mode` : The default value is `"LINE_CROSS"`. The arc line will move outward by `width / 2` and inward by `width / 2`. If it's `"LINE_OUTWARD"`, The arc line moves outward by `width`. The `"LINE_INWARD"` moves the arc line inward by `width`.
- `$fa`, `$fs`, `$fn` : Check [the circle module](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Using_the_2D_Subsystem#circle) for more details.