$fn = 64;

// --- Parameters ---
width = 80;
depth = 100;
height = 100;
wall = 2;
clearance = 0.6;
pin_d = 2.5; // Diameter for filament or metal hinge pin

// Derived geometry values
hinge_y = wall + 8;
hinge_z = wall + 8;
// Max radius of the bin's curved back to clear the housing ceiling
R_outer = height - wall - hinge_z - 1.5; 

// --- Modules ---

module housing() {
    difference() {
        // Main block
        cube([width, depth, height]);

        // Inner cavity (open front)
        translate([wall, -1, wall])
            cube([width - 2*wall, depth, height - 2*wall]);

        // Hinge hole (goes all the way through)
        translate([-1, hinge_y, hinge_z])
            rotate([0, 90, 0])
            cylinder(d=pin_d, h=width + 2);

        // Thumb access notch in the top cover
        translate([width/2, 0, height])
            cylinder(d=35, h=wall*3, center=true);
    }
}

module bin() {
    bin_w = width - 2*wall - 2*clearance;
    bin_bottom = wall + clearance;

    difference() {
        // Main solid body (intersection of bounding box and cylinder)
        intersection() {
            translate([0, 0, bin_bottom])
                cube([bin_w, depth, height]);
            translate([0, hinge_y, hinge_z])
                rotate([0, 90, 0])
                cylinder(r=R_outer, h=bin_w);
        }

        // Hollow interior
        intersection() {
            translate([wall, wall, bin_bottom + wall])
                cube([bin_w - 2*wall, depth, height]);
            translate([-1, hinge_y, hinge_z])
                rotate([0, 90, 0])
                cylinder(r=R_outer - wall, h=bin_w + 2);
        }

        // Hinge hole
        translate([-1, hinge_y, hinge_z])
            rotate([0, 90, 0])
            cylinder(d=pin_d, h=bin_w + 2);

        // Thumb notch in front face
        translate([bin_w/2, -1, hinge_z + R_outer])
            rotate([-90, 0, 0])
            cylinder(d=30, h=wall + 4);

        // Front-bottom chamfer to clear the housing floor during tilt
        translate([-1, 0, bin_bottom])
            rotate([45, 0, 0])
            translate([0, -10, -10])
            cube([bin_w + 2, 20, 20]);
    }

    // Stopper bump (limits tilt angle by catching on the housing ceiling)
    translate([0, hinge_y, hinge_z])
        rotate([-40, 0, 0]) 
        translate([0, -2, R_outer - 1])
        cube([bin_w, 4, 3]);
}

// --- Print Layout ---
// Parts are laid out side-by-side for easy, support-free printing.
// Assemble by sliding the bin into the housing and inserting a pin/filament.

housing();

translate([width + 15, 0, 0]) 
    bin();