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dotSCAD/docs/lib3x-shape_pie.md
2022-06-06 13:11:46 +08:00

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# shape_pie
Returns shape points of a pie (circular sector) shape. They can be used with xxx_extrude modules of dotSCAD. The shape points can be also used with the built-in polygon module.
## Parameters
- `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.
- `$fa`, `$fs`, `$fn` : Check [the circle module](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Using_the_2D_Subsystem#circle) for more details.
## Examples
use <shape_pie.scad>
shape_pts = shape_pie(10, [45, 315], $fn = 24);
polygon(shape_pts);
![shape_pie](images/lib3x-shape_pie-1.JPG)
use <shape_pie.scad>
use <helix_extrude.scad>
shape_pts = shape_pie(10, [45, 315], $fn = 8);
helix_extrude(shape_pts,
radius = 40,
levels = 5,
level_dist = 20
);
![shape_pie](images/lib3x-shape_pie-2.JPG)