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Merge branch 'master' of https://github.com/adrianVmariano/BOSL2

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Adrian Mariano 2021-08-27 22:22:44 -04:00
commit e8bf3bdd1a
1 changed files with 84 additions and 10 deletions
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94
threading.scad
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@ -241,16 +241,90 @@ module trapezoidal_threaded_rod(
rr1 = -depth/pitch;
z1 = 1/4-pa_delta;
z2 = 1/4+pa_delta;
profile = [
[-z2, rr1],
[-z1, 0],
[ z1, 0],
[ z2, rr1],
];
generic_threaded_rod(d=d,l=l,pitch=pitch,profile=profile,
left_handed=left_handed,bevel=bevel,bevel1=bevel1,bevel2=bevel2,starts=starts,internal=internal,d1=d1,d2=d2,
higbee=higbee,higbee1=higbee1,higbee2=higbee2,center=center,anchor=anchor,spin=spin,orient=orient)
children();
profile = (
profile!=undef? profile : [
[-z2, rr1],
[-z1, 0],
[ z1, 0],
[ z2, rr1],
]
);
prof3d = path3d(profile);
higthr1 = ceil(higang1 / 360);
higthr2 = ceil(higang2 / 360);
pdepth = -min(subindex(profile,1));
dummy1 = assert(_r1>pdepth) assert(_r2>pdepth);
skew_mat = affine3d_skew(sxz=(_r2-_r1)/l);
side_mat = affine3d_xrot(90) *
affine3d_mirror([-1,1,0]) *
affine3d_scale([1,1,1] * pitch);
hig_table = [
[-twist, 0],
[-twist/2-0.00001, 0],
[-twist/2+higang1, 1],
[+twist/2-higang2, 1],
[+twist/2+0.00001, 0],
[+twist, 0],
];
start_steps = floor(sides / starts);
thread_verts = [
for (step = [0:1:start_steps]) let(
ang = 360 * step/sides,
dz = pitch * step / start_steps,
mat1 = affine3d_zrot(ang*dir),
mat2 = affine3d_translate([(_r1 + _r2) / 2 - pdepth*pitch, 0, 0]) *
skew_mat *
affine3d_translate([0, 0, dz]),
prof = apply(side_mat, [
for (thread = [-threads/2:1:threads/2-1]) let(
tang = (thread/starts) * 360 + ang,
hsc = internal? 1 :
(higang1==0 && tang<=0)? 1 :
(higang2==0 && tang>=0)? 1 :
lookup(tang, hig_table),
mat3 = affine3d_translate([thread, 0, 0]) *
affine3d_scale([1, hsc, 1]) *
affine3d_translate([0,pdepth,0])
) each apply(mat3, prof3d)
])
) [
[0, 0, -l/2-pitch],
each apply(mat1*mat2, prof),
[0, 0, +l/2+pitch]
]
];
thread_vnfs = vnf_merge([
for (i=[0:1:starts-1])
zrot(i*360/starts, p=vnf_vertex_array(thread_verts, reverse=left_handed, style="min_edge")),
for (i=[0:1:starts-1]) let(
rmat = zrot(i*360/starts),
pts = deduplicate(list_head(thread_verts[0], len(prof3d)+1)),
faces = [for (i=idx(pts,e=-2)) [0, i+1, i]],
rfaces = left_handed? [for (x=faces) reverse(x)] : faces
) [apply(rmat,pts), rfaces],
for (i=[0:1:starts-1]) let(
rmat = zrot(i*360/starts),
pts = deduplicate(list_tail(last(thread_verts), -len(prof3d)-2)),
faces = [for (i=idx(pts,e=-2)) [len(pts)-1, i, i+1]],
rfaces = left_handed? [for (x=faces) reverse(x)] : faces
) [apply(rmat,pts), rfaces]
]);
anchor = get_anchor(anchor, center, BOT, CENTER);
attachable(anchor,spin,orient, r1=_r1, r2=_r2, l=l) {
intersection() {
//vnf_validate(vnf_quantize(thread_vnfs), size=0.1);
vnf_polyhedron(vnf_quantize(thread_vnfs), convexity=10);
if (bevel) {
cyl(l=l, r1=_r1, r2=_r2, chamfer=depth);
} else {
cyl(l=l, r1=_r1, r2=_r2);
}
}
children();
}
}