dotSCAD/docs/lib-triangulate.md

triangulate

Given a 2D shape. This function performs a simple polygon triangulation algorithm and returns the indices of each triangle.

Since: 1.3.

Parameters

• shape_pts : The shape points.
• epsilon : An upper bound on the relative error due to rounding in floating point arithmetic. Default to 0.0001.

Examples

include <triangulate.scad>; 

shape = [
    [0, 0],
    [10, 0],
    [12, 5],
    [5, 10],
    [10, 15],
    [0, 20],
    [-5, 18],
    [-18, 3],
    [-4, 10]
];

tris = triangulate(shape);

difference() {
    polygon(shape);

    for(tri = tris) {
        offset(-.2) 
            polygon([for(idx = tri) shape[idx]]);
        
    }
}