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refacted before adding test

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Justin Lin
2017-06-25 11:47:30 +08:00
parent 00eff2530f
commit 61284cb524
1 changed files with 40 additions and 13 deletions
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51
src/ellipse_extrude.scad
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@@ -18,24 +18,51 @@ module ellipse_extrude(semi_minor_axis, height, center = false, convexity = 10,
); );
angle = asin(h / semi_minor_axis) / slices; angle = asin(h / semi_minor_axis) / slices;
module extrude(pre_z = 0, i = 1) { function f_extrude(i = 1) =
if(i <= slices) { i <= slices ?
f = cos(angle * i) / cos(angle * (i - 1)); concat(
z = semi_minor_axis * sin(angle * i); [
[
cos(angle * i) / cos(angle * (i - 1)),
semi_minor_axis * sin(angle * i)
]
],
f_extrude(i + 1)
) : [];
translate([0, 0, pre_z]) fzs = f_extrude();
rotate(-twist / slices * (i - 1)) len_fzs = len(fzs);
function accm_fs(pre_f = 1, i = 0) =
i < len_fzs ?
concat(
[pre_f * fzs[i][0]],
accm_fs(pre_f * fzs[i][0], i + 1)
) : [];
child_fs = concat([1], accm_fs());
pre_zs = concat(
[0],
[
for(i = [0:len_fzs - 1])
fzs[i][1]
]
);
module extrude() {
for(i = [0:len_fzs - 1]) {
f = fzs[i][0];
z = fzs[i][1];
translate([0, 0, pre_zs[i]])
rotate(-twist / slices * i)
linear_extrude( linear_extrude(
z - pre_z, z - pre_zs[i],
convexity = convexity, convexity = convexity,
twist = twist / slices, twist = twist / slices,
slices = 1, slices = 1,
scale = f scale = f
) children(); ) scale(child_fs[i]) children();
extrude(z, i + 1)
scale(f)
children();
} }
} }