$fn = 64;

// --- Parameters ---
hex_radius = 25;       // Radius of a single hexagon (center to vertex)
base_thickness = 3;    // Thickness of the baseplate
overlap = 0.05;        // Small overlap to ensure watertight union

// --- Main Rendering ---
hex_cluster_7();

// --- Modules ---
module single_hex() {
    // $fn=6 creates the hexagon shape, overriding the global 64
    cylinder(h=base_thickness, r=hex_radius + overlap, $fn=6);
}

module hex_cluster_7() {
    // Distance between centers of adjacent hexagons sharing a flat edge
    center_dist = hex_radius * sqrt(3);
    
    union() {
        // Central hexagon
        single_hex();
        
        // 6 surrounding hexagons
        for (i = [0:5]) {
            // In OpenSCAD, cylinder($fn=6) places vertices at 0, 60, 120...
            // Flat edges are perpendicular to 30, 90, 150... degrees
            angle = i * 60 + 30;
            
            translate([
                center_dist * cos(angle), 
                center_dist * sin(angle), 
                0
            ])
            single_hex();
        }
    }
}