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support 2d/3d

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This commit is contained in:
Justin Lin
2020-12-04 15:42:21 +08:00
parent e359c24350
commit ced32c5615
2 changed files with 23 additions and 6 deletions
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25
src/voxel/_impl/_vx_bezier_impl.scad
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@@ -1,4 +1,4 @@
function _vx_bezier_pt(p1, p2, p3, p4, pts) =
function _vx_bezier_pt3(p1, p2, p3, p4, pts) =
let(
a1 = (p1 + p2) * 0.5,
a2 = (p2 + p3) * 0.5,
@@ -8,9 +8,26 @@ function _vx_bezier_pt(p1, p2, p3, p4, pts) =
c = (b1 + b2) * 0.5,
p = [round(c[0]), round(c[1]), round(c[2])]
)
_vx_bezier(c, b2, a3, p4, _vx_bezier(p1, a1, b1, c, concat(pts, [p])));
_vx_bezier3(c, b2, a3, p4, _vx_bezier3(p1, a1, b1, c, concat(pts, [p])));
function _vx_bezier(p1, p2, p3, p4, pts) =
function _vx_bezier3(p1, p2, p3, p4, pts) =
(abs(p1[0] - p4[0]) < 1 && abs(p1[1] - p4[1]) < 1 && abs(p1[2] - p4[2]) < 1) ?
pts :
_vx_bezier_pt(p1, p2, p3, p4, pts);
_vx_bezier_pt3(p1, p2, p3, p4, pts);
function _vx_bezier_pt2(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,
p = [round(c[0]), round(c[1])]
)
_vx_bezier2(c, b2, a3, p4, _vx_bezier2(p1, a1, b1, c, concat(pts, [p])));
function _vx_bezier2(p1, p2, p3, p4, pts) =
(abs(p1[0] - p4[0]) < 1 && abs(p1[1] - p4[1]) < 1) ?
pts :
_vx_bezier_pt2(p1, p2, p3, p4, pts);

4
src/voxel/vx_bezier.scad
View File

@@ -5,7 +5,7 @@ use <_impl/_vx_bezier_impl.scad>;
function vx_bezier(p1, p2, p3, p4) =
let(
is2d = len(p1) == 2,
pts = is2d ? _vx_bezier(__to3d(p1), __to3d(p2), __to3d(p3), __to3d(p4), []) :
_vx_bezier(p1, p2, p3, p4, [])
pts = is2d ? _vx_bezier2(__to3d(p1), __to3d(p2), __to3d(p3), __to3d(p4), []) :
_vx_bezier3(p1, p2, p3, p4, [])
)
is2d ? [for(p = pts) __to2d(p)] : pts;