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refactor

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This commit is contained in:
Justin Lin 2022-05-07 16:47:44 +08:00
parent 916f833107
commit 6b353cb7a5
1 changed files with 6 additions and 7 deletions
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13
src/_impl/_bspline_curve_impl.scad
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@ -21,18 +21,17 @@ function _bspline_curve_alpha(i, l, t, degree, knots) =
function _bspline_curve_nvi(v, i, l, t, degree, knots, d) =
let(alpha = _bspline_curve_alpha(i, l, t, degree, knots))
[[for(j = 0; j < d + 1; j = j + 1) ((1 - alpha) * v[i - 1][j] + alpha * v[i][j])]];
[for(j = 0; j < d + 1; j = j + 1) ((1 - alpha) * v[i - 1][j] + alpha * v[i][j])];
function _bspline_curve_nvl(v, l, s, t, degree, knots, d, i) =
i == (s - degree - 1 + l) ? v :
let(
leng_v = len(v),
nvi = _bspline_curve_nvi(v, i, l, t, degree, knots, d),
nv = concat(
[for(j = 0; j < i; j = j + 1) v[j]],
nvi,
[for(j = i + 1; j < leng_v; j = j + 1) v[j]]
)
nv = [
each [for(j = 0; j < i; j = j + 1) v[j]],
_bspline_curve_nvi(v, i, l, t, degree, knots, d),
each [for(j = i + 1; j < leng_v; j = j + 1) v[j]]
]
)
_bspline_curve_nvl(nv, l, s, t, degree, knots, d, i - 1);