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add vx_bezier

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This commit is contained in:
Justin Lin
2020-12-04 08:52:41 +08:00
parent 50bee93a3d
commit db384f3d07
2 changed files with 18 additions and 0 deletions
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15
src/voxel/_impl/_vx_bezier_impl.scad Normal file
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function _vx_bezier_pt(p1, p2, p3, p4, pts) =
let(
a1 = (p1 + p2) * 0.5,
a2 = (p2 + p3) * 0.5,
a3 = (p3 + p4) * 0.5,
b1 = (a1 + a2) * 0.5,
b2 = (a2 + a3) * 0.5,
c = (b1 + b2) * 0.5
)
_vx_bezier(c, b2, a3, p4, _vx_bezier(p1, a1, b1, c, concat(pts, [[round(c[0]), round(c[1])]])));
function _vx_bezier(p1, p2, p3, p4, pts) =
(abs(p1[0] - p4[0]) < 1 && abs(p1[1] - p4[1]) < 1) ?
pts :
_vx_bezier_pt(p1, p2, p3, p4, pts);

3
src/voxel/vx_bezier.scad Normal file
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use <_impl/_vx_bezier_impl.scad>;
function vx_bezier(p1, p2, p3, p4) = _vx_bezier(p1, p2, p3, p4, []);