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refactor

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This commit is contained in:
Justin Lin 2020-09-20 20:45:22 +08:00
parent a1686c4fea
commit 182c6369d5
1 changed files with 30 additions and 29 deletions
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59
examples/string_tetrahedron.scad
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@ -6,37 +6,38 @@ segs_per_side = 20;
line_fn = 5;
model = "Tetrahedron"; // [Tetrahedron, Base, Both]
module lines_between(side1, side2, thickness, segs) {
function pts(p1, p2, segs) =
let(
p = p2 - p1,
dx = p[0] / segs,
dy = p[1] / segs,
dz = p[2] / segs
) [for(i = [0:segs]) p1 + [dx, dy, dz] * i];
pts1 = pts(side1[0], side1[1], segs);
pts2 = pts(side2[0], side2[1], segs);
for(i = [0:len(pts1) - 1]) {
hull_polyline3d(points = [pts1[i], pts2[i]], thickness = thickness);
}
}
function height(leng) =
leng * sqrt(1 - 4 / 9 * pow(sin(60), 2));
function vts(leng) =
let(
half_leng = leng / 2,
center_y = half_leng * tan(30),
vt1 = [half_leng, - center_y, 0],
vt2 = [0, leng * sin(60) - center_y, 0],
vt3 = [-half_leng, -center_y, 0],
vt4 = [0, 0, height(leng)]
) [vt1, vt2, vt3, vt4];
module string_tetrahedron(leng, thickness, segs_per_side, line_fn) {
module lines_between(side1, side2, thickness, segs) {
function pts(p1, p2, segs) =
let(
p = p2 - p1,
dx = p[0] / segs,
dy = p[1] / segs,
dz = p[2] / segs
) [for(i = [0:segs]) p1 + [dx, dy, dz] * i];
pts1 = pts(side1[0], side1[1], segs);
pts2 = pts(side2[0], side2[1], segs);
for(i = [0:len(pts1) - 1]) {
hull_polyline3d(points = [pts1[i], pts2[i]], thickness = thickness);
}
}
function height(leng) =
leng * sqrt(1 - 4 / 9 * pow(sin(60), 2));
function vts(leng) =
let(
half_leng = leng / 2,
center_y = half_leng * tan(30),
vt1 = [half_leng, - center_y, 0],
vt2 = [0, leng * sin(60) - center_y, 0],
vt3 = [-half_leng, -center_y, 0],
vt4 = [0, 0, height(leng)]
) [vt1, vt2, vt3, vt4];
$fn = line_fn;
half_leng = leng / 2;