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Added reverse_polygon() and improved ccw_polygon() and clockwise_polygon()

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Revar Desmera
2019-11-17 18:19:55 -08:00
parent 2b95e67cda
commit bb92d788ef
3 changed files with 26 additions and 6 deletions
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13
geometry.scad
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@@ -1230,7 +1230,7 @@ function polygon_is_clockwise(path) =
// Description:
// Given a polygon path, returns the clockwise winding version of that path.
function clockwise_polygon(path) =
polygon_is_clockwise(path)? path : reverse(path);
polygon_is_clockwise(path)? path : reverse_polygon(path);
// Function: ccw_polygon()
@@ -1239,7 +1239,16 @@ function clockwise_polygon(path) =
// Description:
// Given a polygon path, returns the counter-clockwise winding version of that path.
function ccw_polygon(path) =
polygon_is_clockwise(path)? reverse(path) : path;
polygon_is_clockwise(path)? reverse_polygon(path) : path;
// Function: reverse_polygon()
// Usage:
// reverse_polygon(poly)
// Description:
// Reverses a polygon's winding direction, while still using the same start point.
function reverse_polygon(poly) =
let(lp=len(poly)) [for (i=idx(poly)) poly[(lp-i)%lp]];