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behave as rotate

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Justin Lin
2017-04-29 22:18:30 +08:00
parent 252656eb73
commit 60235c44d3
1 changed files with 18 additions and 1 deletions
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19
src/rotate_p.scad
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@@ -35,5 +35,22 @@ function _rotz(pt, a) =
pt[2] pt[2]
]; ];
function rotate_p(point, a) = function _rotate_p_3d(point, a) =
_rotz(_roty(_rotx(point, a[0]), a[1]), a[2]); _rotz(_roty(_rotx(point, a[0]), a[1]), a[2]);
function _to2d(p) = [p[0], p[1]];
function to_avect(a) =
len(a) == 3 ? a : (
len(a) == 2 ? [a[0], a[1], 0] : (
len(a) == 1 ? [a[0], 0, 0] : [0, 0, a]
)
);
function rotate_p(point, a) =
let(angle = to_avect(a))
len(point) == 3 ?
_rotate_p_3d(point, angle) :
_to2d(
_rotate_p_3d([point[0], point[1], 0], angle)
);