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accept 2d points

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Justin Lin 2019-07-28 18:21:17 +08:00
parent f400281c15
commit 9940e18fff
1 changed files with 3 additions and 2 deletions
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5
src/bspline_curve.scad
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@ -46,20 +46,21 @@ function _bspline_curve_v(v, s, t, degree, knots, l = 1) =
function _bspline_curve_interpolate(t, degree, points, knots, weights) =
let(
d = len(points[0]),
n = len(points),
kts = is_undef(knots) ? _bspline_curve_knots(n, degree) : knots,
wts = is_undef(weights) ? _bspline_curve_weights(n) : weights,
v = [
for(i = 0; i < n; i = i + 1)
let(p = points[i] * wts[i])
[p[0], p[1], p[2], wts[i]]
concat([for(j = 0; j < d; j = j + 1) p[j]], [wts[i]])
],
ts = _bspline_curve_ts(t, degree, kts),
nt = ts[0],
s = ts[1],
nv = _bspline_curve_v(v, s, nt, degree, kts)
)
[for(i = 0; i < 3; i = i + 1) nv[s][i] / nv[s][3]];
[for(i = 0; i < d; i = i + 1) nv[s][i] / nv[s][d]];
function bspline_curve(t_step, degree, points, knots, weights) =
[