$fn=64;

// --- Parameters ---
hex_spacing = 25;       // Distance between hex centers
wall_thickness = 1.6;   // Thickness of walls between compartments
floor_thickness = 1.6;  // Thickness of the bottom base
unit_height = 15;       // Height of 1 unit

// Calculated radii for the hexagons (vertex-to-vertex)
r_in = (hex_spacing - wall_thickness) / sqrt(3);
r_out = (hex_spacing + wall_thickness) / sqrt(3);

// Generate the 19 coordinate positions for the hex grid
module hex_positions() {
    for (q = [-2 : 2]) {
        for (r = [-2 : 2]) {
            if (abs(q + r) <= 2) {
                // Axial to Cartesian conversion
                x = hex_spacing * (q + r/2);
                y = hex_spacing * sqrt(3)/2 * r;
                translate([x, y, 0])
                    children();
            }
        }
    }
}

// Main bin module
module 19_hex_bin() {
    difference() {
        // Outer solid shell (unions overlapping hexagons)
        hex_positions()
            rotate([0, 0, 30])
            cylinder(r=r_out, h=unit_height, $fn=6);

        // Inner compartment cutouts
        // Translated up by floor_thickness, extending past the top to ensure manifold cut
        hex_positions()
            translate([0, 0, floor_thickness])
            rotate([0, 0, 30])
            cylinder(r=r_in, h=unit_height, $fn=6);
    }
}

// Render the model
19_hex_bin();