$fn = 64;

// --- Parameters ---
bin_width = 160;
bin_depth = 110;
bin_height = 80;
wall_thickness = 3;
corner_radius = 12;

// --- Modules ---
// Creates a solid rounded box centered on X and Y, sitting on Z=0
module rounded_box(w, d, h, r) {
    hull() {
        for(x = [-w/2 + r, w/2 - r]) {
            for(y = [-d/2 + r, d/2 - r]) {
                translate([x, y, 0]) 
                    cylinder(r=r, h=h);
            }
        }
    }
}

// Creates a 3D bone shape for cutouts
module bone_shape() {
    linear_extrude(wall_thickness * 4, center=true) {
        union() {
            // Main shaft
            square([30, 12], center=true);
            // Left knobs
            translate([-15, 6]) circle(r=7);
            translate([-15, -6]) circle(r=7);
            // Right knobs
            translate([15, 6]) circle(r=7);
            translate([15, -6]) circle(r=7);
        }
    }
}

// --- Main Assembly ---
difference() {
    // 1. Outer Bin Shape
    rounded_box(bin_width, bin_depth, bin_height, corner_radius);

    // 2. Inner Hollow (shifted up by wall_thickness to leave a solid floor)
    // Height is kept the same so it naturally extends past the top edge
    translate([0, 0, wall_thickness])
        rounded_box(
            bin_width - (wall_thickness * 2), 
            bin_depth - (wall_thickness * 2), 
            bin_height, 
            corner_radius - wall_thickness
        );

    // 3. Side Handle Cutouts
    translate([0, 0, bin_height - 18]) {
        hull() {
            translate([0, 20, 0]) 
                rotate([0, 90, 0]) 
                cylinder(r=6, h=bin_width + 10, center=true);
            translate([0, -20, 0]) 
                rotate([0, 90, 0]) 
                cylinder(r=6, h=bin_width + 10, center=true);
        }
    }

    // 4. Front Pet Bone Decoration Cutout
    translate([0, -bin_depth/2, bin_height/2])
        rotate([90, 0, 0])
        bone_shape();
        
    // 5. Back Pet Bone Decoration Cutout
    translate([0, bin_depth/2, bin_height/2])
        rotate([90, 0, 0])
        bone_shape();
}