polyround --- polygon with rounded corners
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An OpenSCAD library to easily create polygons with rounded corners.
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You use polyround in the same way as you would use polygon, with the exception that all points for the corners have a third "coordinate" resembling the radius used to round the corner. If this radius is 0 for a point the behavior of polyround is exactly identical as polygon. If the radius is a positive number it will draw the outline around a circle with the specified radius located at the position of the coordinates specified, forming a convex rounded corner. For concave rounded corners you specify the radius as a negative number.
Whenever using this package you need to use them inside your OpenSCAD code with the statement
use <polyround.scad>
Once you do that you can use polyround with the same syntax as you would use polygon. Find some examples at the bottom of this file.