dotSCAD/docs/lib2x-voronoi3d.md

voronoi3d

Create a 3D version of Voronoi diagram. The initial space for each cell is calculated automatically from the given points by the following code:

xs = [for(p = points) p[0]];
ys = [for(p = points) abs(p[1])];
zs = [for(p = points) abs(p[2])];
space_size = max([(max(xs) -  min(xs) / 2), (max(ys) -  min(ys)) / 2, (max(zs) -  min(zs)) / 2]);
// cube([space_size, space_size * 2, space_size * 2]);

The preview or rendering of 3D Voronoi is slow. If you want to use this module, render and export the 3D Voronoi model first. Then, import the model to do what you want.

Since: 1.3.

Parameters

• points : Points for each cell.
• spacing : Distance between cells. Default to 1.

Examples

use <voronoi3d.scad>;

r = 30;

zas = rands(0, 359, 12);
yas = rands(0, 179, 12);

points = [
    for(i = [0:len(zas) - 1])
    [
        r * cos(yas[i]) * cos(zas[i]), 
        r * cos(yas[i]) * sin(zas[i]), 
        r * sin(yas[i])
    ]
];

#for(pt = points) {
    translate(pt) cube(1);
}

intersection() {
    sphere(r);
    voronoi3d(points);
}

If you render, export and save the previous model as voronoi3d.stl, the following code will generate a Voronoi sphere.

r = 30;
thickness = 2;

difference() {
    sphere(r);
    scale(1.01) import("voronoi3d.stl");
    sphere(r - thickness);
}