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Simplified list_rotate() and polygon_shift()

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This commit is contained in:
Revar Desmera 2019-10-30 01:19:34 -07:00
parent f19179e232
commit faea648e66
2 changed files with 2 additions and 6 deletions
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3
arrays.scad
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@ -180,8 +180,7 @@ function reverse(list) =
function list_rotate(list,n=1) =
assert(is_list(list)||is_string(list))
assert(is_num(n))
let(n = posmod(n,len(list)))
n==0? list : concat(select(list,n,-1), select(list,0,n-1));
select(list,n,n+len(list)-1);
// Function: deduplicate()

5
geometry.scad
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@ -926,10 +926,7 @@ function polygon_area(vertices) =
// Example:
// polygon_shift([[3,4], [8,2], [0,2], [-4,0]], 2); // Returns [[0,2], [-4,0], [3,4], [8,2]]
function polygon_shift(poly, i) =
assert(i<len(poly))
let(
poly = cleanup_path(poly)
) select(poly,i,i+len(poly)-1);
list_rotate(cleanup_path(poly), i);
// Function: polygon_shift_to_closest_point()