$fn = 64;

// --- Parameters ---
tray_width = 200;      // Total width of the organizer
tray_length = 150;     // Total length of the organizer
tray_height = 25;      // Total height (designed to fit inside a game box lid)

wall_thickness = 2;    // Thickness of outer and dividing walls
floor_thickness = 2;   // Thickness of the bottom floor

columns = 4;           // Number of compartments horizontally
rows = 3;              // Number of compartments vertically

corner_radius = 4;     // Radius for the rounded corners

// --- Helper Module ---
module rounded_box(w, l, h, r) {
    // Ensure radius is not larger than half the width/length to prevent geometry errors
    safe_r = min(r, w/2.01, l/2.01);
    
    hull() {
        translate([safe_r, safe_r, 0]) cylinder(h=h, r=safe_r);
        translate([w-safe_r, safe_r, 0]) cylinder(h=h, r=safe_r);
        translate([safe_r, l-safe_r, 0]) cylinder(h=h, r=safe_r);
        translate([w-safe_r, l-safe_r, 0]) cylinder(h=h, r=safe_r);
    }
}

// --- Main Geometry ---
difference() {
    // Main outer body
    rounded_box(tray_width, tray_length, tray_height, corner_radius);

    // Calculate individual compartment dimensions
    comp_w = (tray_width - (wall_thickness * (columns + 1))) / columns;
    comp_l = (tray_length - (wall_thickness * (rows + 1))) / rows;

    // Subtract compartments
    for(c = [0 : columns - 1]) {
        for(r = [0 : rows - 1]) {
            x_pos = wall_thickness + c * (comp_w + wall_thickness);
            y_pos = wall_thickness + r * (comp_l + wall_thickness);

            // Translate each compartment cutout, adding extra height to prevent Z-fighting
            translate([x_pos, y_pos, floor_thickness])
                rounded_box(comp_w, comp_l, tray_height + 1, corner_radius);
        }
    }
}