$fn = 64;

// --- Parameters ---
hex_inner_width = 33.0;     // Distance between opposite flat inner walls of the hex bin
divider_height = 30.0;      // Total height of the divider
thickness = 2.0;            // Thickness of the divider wall
snap_protrusion = 0.8;      // Depth of the snap-in ridges on the sides
clearance = 0.4;            // Clearance for easy insertion

// --- Calculated Variables ---
width = hex_inner_width - clearance;
ridge_radius = (thickness / 2) + snap_protrusion;

// --- Main Model ---
hex_bin_divider();

module hex_bin_divider() {
    difference() {
        union() {
            // Main divider wall
            translate([0, 0, divider_height / 2])
                cube([width, thickness, divider_height], center=true);

            // Left snap ridge
            translate([-width / 2, 0, 0])
                snap_ridge();

            // Right snap ridge
            translate([width / 2, 0, 0])
                snap_ridge();
        }

        // Finger notch at the top for easy removal
        translate([0, 0, divider_height])
            scale([1.8, 1, 1])
            rotate([90, 0, 0])
            cylinder(h=thickness + 4, r=5, center=true);
    }
}

module snap_ridge() {
    // A vertical ridge with chamfered top and bottom for smooth snap-in
    hull() {
        // Bottom taper (eases insertion into the bin)
        translate([0, 0, 0])
            cylinder(r=thickness / 2, h=0.1);
            
        // Main ridge body lower point
        translate([0, 0, 3])
            cylinder(r=ridge_radius, h=0.1);
            
        // Main ridge body upper point
        translate([0, 0, divider_height - 3])
            cylinder(r=ridge_radius, h=0.1);
            
        // Top taper
        translate([0, 0, divider_height - 0.1])
            cylinder(r=thickness / 2, h=0.1);
    }
}