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Code Issues Releases Wiki Activity

reuse rot matrix

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This commit is contained in:
Justin Lin
2022-05-11 10:15:45 +08:00
parent fc5965267f
commit e3fd9908d3
1 changed files with 9 additions and 2 deletions
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11
src/_impl/_golden_spiral_impl.scad
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@@ -8,6 +8,13 @@ function _remove_same_pts(pts1, pts2) =
pts1[len(pts1) - 1] == pts2[0] ? [for(i = [1:len(pts2) - 1]) pts2[i]] : pts2
);
function _rz_matrix(a) =
let(c = cos(a), s = sin(a))
[
[ c, s],
[-s, c],
];
function _from_ls_or_eql_to(from, to, point_distance, rt_dir) =
let(
f1 = __fast_fibonacci(from),
@@ -23,13 +30,13 @@ function _from_ls_or_eql_to(from, to, point_distance, rt_dir) =
d_f1f2 = f1 - __fast_fibonacci(from + 1),
off_p = rt_dir == 1 ? [0, d_f1f2, 0] : [d_f1f2, 0, 0],
za = 90 * rt_dir,
ra = [0, 0, za]
m = _rz_matrix(za)
) _remove_same_pts(
[for(i = range_i) [circle_pts[c_idx(i)], as[i]]],
[
for(pt_a = _golden_spiral(from + 1, to, point_distance, rt_dir))
[
ptf_rotate(pt_a[0], ra) + off_p,
pt_a[0] * m + off_p,
pt_a[1] + za
]
]