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regular_shapes: Avoid the circle trick

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As is stated in the very own manual of OpenSCAD [1], generating polygons
using the circle function is a trick that should be avoided.

 [1]
https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/2D_Primitives#regular_polygon
This commit is contained in:
Rock Storm 2018-10-02 18:31:37 +01:00
parent dc32fed745
commit 2e4d6b4037
1 changed files with 5 additions and 1 deletions
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regular_shapes.scad
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@ -33,7 +33,11 @@ module reg_polygon(sides,radius)
if(sides<2) square([radius,0]); if(sides<2) square([radius,0]);
if(sides==3) triangle(radius); if(sides==3) triangle(radius);
if(sides==4) square([dia(radius),dia(radius)],center=true); if(sides==4) square([dia(radius),dia(radius)],center=true);
if(sides>4) circle(r=radius,$fn=sides); if(sides>4) {
angles=[ for (i = [0:sides-1]) i*(360/sides) ];
coords=[ for (th=angles) [radius*cos(th), radius*sin(th)] ];
polygon(coords);
}
} }
module pentagon(radius) module pentagon(radius)