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Added spin and anchor to various 2D shapes.

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Revar Desmera
2019-05-29 16:27:35 -07:00
parent c7d0be8ba5
commit 3b0a1a3383
4 changed files with 111 additions and 68 deletions
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8
coords.scad
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@@ -98,7 +98,9 @@ function scale_points(pts, v=[0,0,0], cp=[0,0,0]) = [for (pt = pts) [for (i = [0
// pts = List of 3D points to rotate.
// ang = Angle to rotate by.
// cp = 2D Centerpoint to rotate around. Default: `[0,0]`
function rotate_points2d(pts, ang, cp=[0,0]) = let(
function rotate_points2d(pts, ang, cp=[0,0]) =
approx(ang,0)? pts :
let(
m = affine2d_zrot(ang)
) [for (pt = pts) m*point3d(pt-cp)+cp];
@@ -155,7 +157,9 @@ function rotate_points3d(pts, a=0, v=undef, cp=[0,0,0], from=undef, to=undef, re
)
),
m = affine3d_translate(cp) * mrot * affine3d_translate(-cp)
) [for (pt = pts) point3d(m*concat(point3d(pt),[1]))];
) (!is_undef(from) && approx(from,to))? pts :
(a==0 || a==[0,0,0])? pts :
[for (pt = pts) point3d(m*concat(point3d(pt),[1]))];