$fn=64;

// --- Parameters ---
base_width = 160;       // Width of the bin at the bottom
base_depth = 120;       // Depth of the bin at the bottom
top_width = 200;        // Width of the bin at the top (flared)
top_depth = 160;        // Depth of the bin at the top
height = 140;           // Total height of the bin
wall_thickness = 3;     // Thickness of the walls and base
corner_radius = 15;     // Radius of the rounded corners

// --- Main Rendering ---
difference() {
    // 1. Outer Bin Body with Top Rim
    union() {
        // Main body
        bin_shape(base_width, base_depth, top_width, top_depth, height, corner_radius);
        
        // Top lip/rim for structural strength
        translate([0, 0, height - 5])
            bin_shape(top_width + 4, top_depth + 4, top_width + 4, top_depth + 4, 5, corner_radius + 2);
    }

    // 2. Inner Hollow (Subtracted)
    translate([0, 0, wall_thickness])
        bin_shape(
            base_width - (wall_thickness * 2),
            base_depth - (wall_thickness * 2),
            top_width - (wall_thickness * 2),
            top_depth - (wall_thickness * 2),
            height + 2, // Extend past top to cut cleanly and prevent Z-fighting
            corner_radius - wall_thickness
        );

    // 3. Bone-shaped Handle Cutouts (Front and Back)
    translate([0, 0, height - 30])
        bone_handle();
}

// --- Modules ---

// Generates a flared, rounded rectangular prism
module bin_shape(w_base, d_base, w_top, d_top, h, r) {
    hull() {
        for(x = [-1, 1], y = [-1, 1]) {
            // Bottom corners
            translate([x * (w_base/2 - r), y * (d_base/2 - r), 0])
                cylinder(r=r, h=0.1);
            // Top corners
            translate([x * (w_top/2 - r), y * (d_top/2 - r), h - 0.1])
                cylinder(r=r, h=0.1);
        }
    }
}

// Generates a 3D bone shape to be used as a cutter for the handles
module bone_handle() {
    rotate([90, 0, 0])
    linear_extrude(height = top_depth + 50, center = true) {
        union() {
            // Center bar
            hull() {
                translate([-20, 0]) circle(r=6);
                translate([20, 0]) circle(r=6);
            }
            // Left bone joints
            translate([-24, 6]) circle(r=8);
            translate([-24, -6]) circle(r=8);
            // Right bone joints
            translate([24, 6]) circle(r=8);
            translate([24, -6]) circle(r=8);
        }
    }
}