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57 lines
1.5 KiB
Markdown
57 lines
1.5 KiB
Markdown
# shape_cyclicpolygon
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Returns shape points of a regular cyclic polygon. 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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- `sides` : The sides of the circle.
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- `circle_r` : The radius of the circumcircle.
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- `corner_r` : The radius of the circle at a corner.
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- `$fa`, `$fs`, `$fn` : Check [the circle module](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Using_the_2D_Subsystem#circle) for more details.
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## Examples
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use <shape_cyclicpolygon.scad>
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circle_r = 10;
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corner_r = 3;
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$fn = 24;
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for(i = [0:2]) {
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translate([i * circle_r * 2, 0, 0])
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polygon(
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shape_cyclicpolygon(
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sides = 3 + i,
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circle_r = circle_r,
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corner_r = corner_r
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)
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);
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}
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for(i = [0:2]) {
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translate([i * circle_r * 2, -circle_r * 2, 0])
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polygon(
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shape_cyclicpolygon(
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sides = 4 + i,
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circle_r = circle_r ,
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corner_r = corner_r
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)
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);
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}
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use <shape_cyclicpolygon.scad>
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use <ring_extrude.scad>
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shape_pts = shape_cyclicpolygon(
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sides = 5,
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circle_r = 10,
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corner_r = 3
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);
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ring_extrude(shape_pts, radius = 20, angle = 180, twist = 90);
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