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support twist

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Justin Lin
2020-02-19 16:25:17 +08:00
parent fd431a751b
commit 94d2585d41
1 changed files with 37 additions and 14 deletions
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51
src/experimental/sf_ring.scad
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@@ -7,30 +7,53 @@ use <experimental/tf_ring.scad>;
radius: ring radius.
thickness: thickness
angle: arc angle.
twist: The number of degrees of through which the rectangle is twisted.
invert: inverts how the gray levels are translated into height values.
*/
module sf_ring(levels, radius, thickness, angle = 360, invert = false) {
module sf_ring(levels, radius, thickness, angle = 360, twist = 0, invert = false) {
surface = _sf_square_surfaces(levels, thickness, invert);
rows = len(levels);
columns = len(levels[0]);
size = [columns - 1, rows - 1];
offset_z = invert ? thickness : 0;
sf_solidify(
[
for(row = surface[0])
centered = invert ? [0, 0, thickness] : [0, 0, thickness / 2];
if(invert) {
mirror([0, 0, 1])
sf_solidify(
[
for(row = surface[1])
[
for(p = row)
tf_ring(size, p + centered, radius, angle, twist)
]
],
[
for(row = surface[0])
[
for(p = row)
tf_ring(size, [p[0], p[1], -p[2]], radius, angle, twist)
]
]
);
} else {
sf_solidify(
[
for(p = row)
tf_ring(size, p, radius, angle, 0) + + [0, 0, offset_z]
]
],
[
for(row = surface[1])
for(row = surface[0])
[
for(p = row)
tf_ring(size, p - centered, radius, angle, twist) + [0, 0, offset_z]
]
],
[
for(p = row)
tf_ring(size, p, radius, angle, 0)
for(row = surface[1])
[
for(p = row)
tf_ring(size, p - centered, radius, angle, twist)
]
]
]
);
);
}
}