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56 lines
1.0 KiB
Markdown
56 lines
1.0 KiB
Markdown
# footprints3
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A 3D verion of [footprint2](https://openhome.cc/eGossip/OpenSCAD/lib2x-footprints2.html).
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**Since:** 2.4
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## Parameters
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- `cmds` : A list of `["forward", length]`s, `["turn", angle]`s, `["roll", angle]`s and `["pitch", angle]`s.
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- `start` : Set the start point of the turtle. Default to `[0, 0, 0]`.
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## Examples
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use <hull_polyline3d.scad>;
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use <turtle/footprints3.scad>;
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function xy_arc_cmds(radius, angle, steps) =
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let(
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fa = angle / steps,
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ta = fa / 2,
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leng = sin(ta) * radius * 2
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)
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concat(
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[["turn", ta]],
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[
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for(i = [0:steps - 2])
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each [["forward", leng], ["turn", fa]]
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],
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[["forward", leng], ["turn", ta]]
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);
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poly = footprints3(
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concat(
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[
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["forward", 10],
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["turn", 90],
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["forward", 10]
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],
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xy_arc_cmds(5, 180, 12),
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[
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["pitch", 90],
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["forward", 10],
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["roll", 90]
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],
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xy_arc_cmds(5, 180, 12),
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[
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["forward", 10]
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]
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)
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);
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hull_polyline3d(poly, thickness = 1);
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