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

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# shape_starburst
Returns shape points of a star. They can be used with xxx_extrude modules of dotSCAD. The shape points can be also used with the built-in polygon module.
## Parameters
- `r1` : The outer radius of the starburst.
- `r2` : The inner radius of the starburst.
- `n` : The burst number.
## Examples
use <shape_starburst.scad>
polygon(shape_starburst(30, 12, 6));
![shape_starburst](images/lib3x-shape_starburst-1.JPG)
use <shape_starburst.scad>
use <golden_spiral_extrude.scad>
shape_pts = shape_starburst(5, 2, 8);
golden_spiral_extrude(
shape_pts,
from = 5,
to = 10,
point_distance = 1,
scale = 10
);
![shape_pentagram](images/lib3x-shape_starburst-2.JPG)