openscad/dotSCAD
1
0
Fork 0
mirror of https://github.com/JustinSDK/dotSCAD.git synced 2025-08-28 17:00:00 +02:00
Code Issues Releases Wiki Activity

a uniform knot vector is enough

Browse Source
This commit is contained in:
Justin Lin
2019-10-12 07:45:24 +08:00
parent 3ccb725645
commit 107837bbdd
1 changed files with 13 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
examples/klein_bottle.scad
View File

@@ -43,8 +43,8 @@ module klein_bottle(radius1, radius2, bottom_height, thickness, t_step, fn) {
} }
module tube() { module tube() {
mid_pts = [ mid_pts = [
[0, 0, bottom_height + radius1 / 2],
[0, 0, bottom_height + radius1], [0, 0, bottom_height + radius1],
[0, 0, bottom_height + radius1 * 2], [0, 0, bottom_height + radius1 * 2],
[0, radius1, bottom_height + radius1 * 3.5], [0, radius1, bottom_height + radius1 * 3.5],
@@ -57,34 +57,24 @@ module klein_bottle(radius1, radius2, bottom_height, thickness, t_step, fn) {
[0, radius1 * 1, bottom_height - radius1 * 2], [0, radius1 * 1, bottom_height - radius1 * 2],
[0, radius1 * 0.15, bottom_height + half_thickness - radius1 * 3], [0, radius1 * 0.15, bottom_height + half_thickness - radius1 * 3],
[0, 0, bottom_height - radius1 * 4], [0, 0, bottom_height - radius1 * 4],
[0, 0, bottom_height - radius1 * 5] [0, 0, bottom_height - radius1 * 5],
[0, 0, bottom_height - radius1 * 6]
]; ];
degree = 2; degree = 2;
pts_leng = 15; bs_curve = bspline_curve(t_step, degree, mid_pts);
knot_leng = 18;
knots = concat( tube_path = concat(
[0, 0, 0], [[0, 0, bottom_height]],
[for(i = [1:12]) i / 13], bs_curve,
[2, 2, 2] [[0, 0, 0]]
); );
tube_path = bspline_curve( tube_path2 = concat(
t_step, [[0, 0, bottom_height - thickness]],
degree, bs_curve,
concat( [[0, 0, -thickness]]
concat([[0, 0, bottom_height]], mid_pts), );
[[0, 0, -thickness]]
), knots);
tube_path2 = bspline_curve(
t_step,
degree,
concat(
concat([[0, 0, bottom_height - thickness]], mid_pts),
[[0, 0, -thickness * 1.5]]
), knots);
difference() { difference() {
union() { union() {
@@ -101,7 +91,6 @@ module klein_bottle(radius1, radius2, bottom_height, thickness, t_step, fn) {
tube_path2 tube_path2
); );
} }
} }
tube(); tube();