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36 lines
1.0 KiB
Markdown
36 lines
1.0 KiB
Markdown
# shape_ellipse
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Returns shape points of an ellipse. They can be used with xxx_extrude modules of dotSCAD. The shape points can be also used with the built-in polygon module.
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## Parameters
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- `axes` : 2 element vector `[x, y]` where x is the semi-major axis and y is the semi-minor axis.
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- `$fa`, `$fs`, `$fn` : The shape created by this function can be viewd as `resize([x, y]) circle(r = x)` (but not the real implementation inside the module) so you can use these global variables to control it. Check [the circle module](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Using_the_2D_Subsystem#circle) for more details.
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## Examples
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use <shape_ellipse.scad>
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polygon(
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shape_ellipse([40, 20])
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);
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use <shape_ellipse.scad>
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use <helix_extrude.scad>
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$fn = 8;
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shape_pts = shape_ellipse([20, 10]);
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helix_extrude(shape_pts,
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radius = 40,
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levels = 5,
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level_dist = 20,
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rt_dir = "CLK"
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);
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