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55 lines
1.3 KiB
Markdown
55 lines
1.3 KiB
Markdown
# fibonacci_lattice
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Creates visually even spacing of n points on the surface of the sphere. Nearest-neighbor points will all be approximately the same distance apart. There're 8 spirals on the sphere.
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(It's called "visually even spacing" because only the vertices of the 5 [Platonic solids](https://en.wikipedia.org/wiki/Platonic_solid) can be said to be truly evenly spaced around the surface of a sphere.)
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**Since:** 2.5
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## Parameters
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- `n` : The number of points.
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- `radius` : The sphere radius. Default to 1.
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- `rt_dir` : `"CT_CLK"` for counterclockwise. `"CLK"` for clockwise. The default value is `"CT_CLK"`.
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## Examples
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use <fibonacci_lattice.scad>;
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n = 200;
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radius = 20;
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pts = fibonacci_lattice(n, radius);
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for(p = pts) {
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translate(p)
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sphere(1);
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}
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sphere(radius);
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use <fibonacci_lattice.scad>;
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use <hull_polyline3d.scad>;
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n = 200;
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radius = 20;
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pts = fibonacci_lattice(n, radius);
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for(p = pts) {
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translate(p)
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sphere(1);
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}
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sphere(radius);
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spirals = [for(j = [0:7])
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[for(i = j; i < len(pts); i = i + 8) pts[i]]
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];
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for(spiral = spirals) {
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hull_polyline3d(spiral, 1);
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}
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