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# hull_polyline3d
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Creates a 3D polyline from a list of `[x, y, z]` coordinates. As the name says, it uses the built-in hull operation for each pair of points (created by the `sphere` module). It's slow. However, it can be used to create metallic effects for a small `$fn` , large `$fa` or `$fs` .
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## Parameters
- `points` : The list of `[x, y, z]` points of the polyline. : A vector of 3 element vectors. The points are indexed from 0 to n-1.
- `thickness` : The line thickness.
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- `$fa` , `$fs` , `$fn` : Check [the sphere module ](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Primitive_Solids#sphere ) for more details,.
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## Examples
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include < hull_polyline3d.scad > ;
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hull_polyline3d(
points = [
[1, 2, 3],
[4, -5, -6],
[-1, -3, -5],
[0, 0, 0]
],
thickness = 1,
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$fn = 3
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);
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include < hull_polyline3d.scad > ;
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r = 50;
points = [
for(a = [0:180])
[
r * cos(-90 + a) * cos(a),
r * cos(-90 + a) * sin(a),
r * sin(-90 + a)
]
];
for(i = [0:7]) {
rotate(45 * i)
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hull_polyline3d(points, 2, $fn = 3);
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}
