$fn = 64;

// --- Parameters ---
unit_height = 20;        // Overall height of the bin (1 unit)
hex_radius = 20;         // Outer radius (center to point) of each hexagon cell
wall_thickness = 1.5;    // Thickness of the outer walls
floor_thickness = 1.5;   // Thickness of the solid bottom floor

// --- Derived Parameters ---
// Distance between centers of adjacent hexagons to touch flat-to-flat
center_dist = sqrt(3) * hex_radius; 
// Inner radius calculated to maintain exact outer wall thickness
inner_radius = hex_radius - (wall_thickness / cos(30));

// Module to generate a single hexagon properly oriented
module hex_prism(r, h) {
    rotate([0, 0, 30])
        cylinder(r=r, h=h, $fn=6);
}

// Module to position children at the 3 hexagon centers
module hex_positions() {
    translate([0, 0, 0]) children();
    translate([center_dist, 0, 0]) children();
    translate([center_dist / 2, 1.5 * hex_radius, 0]) children();
}

// Main bin generation
module triangle_3hex_bin() {
    // Center the entire bin around the origin
    translate([-center_dist / 2, -0.75 * hex_radius, 0]) {
        difference() {
            // Outer triangular shape (hull of 3 outer hexagons)
            hull() {
                hex_positions()
                    hex_prism(hex_radius, unit_height);
            }
            
            // Inner hexagonal compartments (subtracted)
            hex_positions() {
                // Translate up by floor_thickness and extend slightly past top to prevent Z-fighting
                translate([0, 0, floor_thickness])
                    hex_prism(inner_radius, unit_height + 1);
            }
        }
    }
}

// Render the model
triangle_3hex_bin();