tier-2-offset-handle-mug / gpt-5.4-2026-03-05

$fn = 128;

mug_outer_d = 80;
mug_inner_d = 70;
mug_h       = 90;
bottom_t    = 6;

handle_inner_h = 30;
handle_inner_w = 25;
handle_wall    = 5;
handle_thick_y = 12;

handle_outer_h = handle_inner_h + 2*handle_wall; // 40
handle_outer_w = handle_inner_w + 2*handle_wall; // 35

mug_r = mug_outer_d/2;
handle_zc = mug_h/2;
attach_overlap = 3;
handle_x = mug_r - attach_overlap;

module d2d(h, w) {
    r = h/2;
    rect_w = max(w - r, 0);
    union() {
        square([rect_w, h], center=false);
        translate([rect_w, r]) circle(r=r);
    }
}

module mug_body() {
    difference() {
        cylinder(h=mug_h, d=mug_outer_d);
        translate([0, 0, bottom_t])
            cylinder(h=mug_h - bottom_t + 0.01, d=mug_inner_d);
    }
}

module handle() {
    translate([handle_x, -handle_thick_y/2, handle_zc - handle_outer_h/2])
        rotate([-90, 0, 0])
            linear_extrude(height=handle_thick_y)
                difference() {
                    d2d(handle_outer_h, handle_outer_w);
                    translate([handle_wall, handle_wall])
                        d2d(handle_inner_h, handle_inner_w);
                }
}

union() {
    mug_body();
    handle();
}

$fn = 128;

// Mug dimensions
outer_d = 80;
inner_d = 70;
mug_h   = 90;
bottom_t = 6;

// Handle opening dimensions
handle_open_w = 25;   // radial width of finger opening
handle_open_h = 30;   // vertical height of finger opening

// Handle thickness around opening
handle_wall = 5;

// Derived
outer_r = outer_d / 2;
inner_r = inner_d / 2;

// Handle placement and size
handle_center_z = mug_h / 2;
handle_outer_h = handle_open_h + 2 * handle_wall;
handle_r = handle_outer_h / 2;                  // radius for rounded top/bottom in YZ profile
handle_straight_h = handle_open_h;              // straight section height in YZ profile

// Radial extents in X
handle_inner_x = outer_r - 1.0;                 // slight overlap into mug for manifold union
handle_outer_x = outer_r + handle_open_w + 2 * handle_wall;

// 2D D-shape in XZ plane, then extruded along Y
module d_shape_2d(x0, x1, zc, open_h) {
    r = open_h / 2;
    union() {
        translate([x0, zc - r]) square([x1 - x0 - r, open_h], center = false);
        translate([x1 - r, zc]) circle(r = r);
    }
}

module mug_body() {
    difference() {
        cylinder(h = mug_h, r = outer_r);
        translate([0, 0, bottom_t])
            cylinder(h = mug_h - bottom_t + 0.01, r = inner_r);
    }
}

module handle() {
    difference() {
        // Outer D-shape
        translate([0, -handle_r, 0])
            rotate([-90, 0, 0])
                linear_extrude(height = 2 * handle_r)
                    d_shape_2d(handle_inner_x, handle_outer_x, handle_center_z, handle_outer_h);

        // Inner opening D-shape
        translate([0, -handle_open_h/2, 0])
            rotate([-90, 0, 0])
                linear_extrude(height = handle_open_h)
                    d_shape_2d(outer_r + handle_wall, outer_r + handle_wall + handle_open_w, handle_center_z, handle_open_h);
    }
}

union() {
    mug_body();
    handle();
}

$fn = 128;

mug_od = 80;
mug_id = 70;
mug_h = 90;
bottom_t = 6;

handle_open_w = 25;
handle_open_h = 30;
handle_wall = 5;
handle_depth = 12;

outer_r = mug_od / 2;
inner_r = mug_id / 2;

handle_outer_w = handle_open_w + 2 * handle_wall;
handle_outer_h = handle_open_h + 2 * handle_wall;

handle_x = outer_r - 2.5;
handle_z = (mug_h - handle_outer_h) / 2;

module d_shape(w, h) {
    r = h / 2;
    union() {
        square([w - r, h], center = false);
        translate([w - r, h / 2])
            circle(r = r);
    }
}

module mug_body() {
    difference() {
        cylinder(h = mug_h, r = outer_r);
        translate([0, 0, bottom_t])
            cylinder(h = mug_h - bottom_t + 0.1, r = inner_r);
    }
}

module handle() {
    translate([handle_x, 0, handle_z])
        rotate([90, 0, 0])
            linear_extrude(height = handle_depth, center = true, convexity = 10)
                difference() {
                    d_shape(handle_outer_w, handle_outer_h);
                    translate([handle_wall, handle_wall])
                        d_shape(handle_open_w, handle_open_h);
                }
}

union() {
    mug_body();
    handle();
}

$fn = 128;

// Mug dimensions
outer_d   = 80;
inner_d   = 70;
mug_h     = 90;
bottom_t  = 6;

// Handle inner opening dimensions
handle_open_w = 25;   // width in radial (X) direction
handle_open_h = 30;   // height in Z direction

// Handle thickness
handle_wall = 5;

// Derived mug radii
outer_r = outer_d / 2;
inner_r = inner_d / 2;

// Handle dimensions
handle_outer_w = handle_open_w + handle_wall;   // D-shape total width (straight side to farthest point)
handle_outer_h = handle_open_h + 2 * handle_wall;

handle_inner_r = handle_open_h / 2;
handle_outer_r = handle_outer_h / 2;

handle_center_z = mug_h / 2;

// Slight overlap into mug body to guarantee manifold union
attach_overlap = 1.0;

// 2D D-shape in XZ plane:
// left side is the straight attachment side, right side is the semicircular outer side
module d2d(x_left, z_center, total_w, total_h) {
    r = total_h / 2;
    union() {
        square_w = total_w - r;
        translate([x_left, z_center - r])
            square([square_w, total_h], center = false);
        translate([x_left + square_w, z_center])
            circle(r = r);
    }
}

module mug_body() {
    difference() {
        cylinder(h = mug_h, r = outer_r);
        translate([0, 0, bottom_t])
            cylinder(h = mug_h - bottom_t + 0.01, r = inner_r);
    }
}

module handle() {
    difference() {
        // Outer handle body
        linear_extrude(height = handle_outer_h, center = true)
            d2d(outer_r - attach_overlap, handle_center_z, handle_outer_w + attach_overlap, handle_outer_h);

        // Inner finger opening
        linear_extrude(height = handle_open_h, center = true)
            d2d(outer_r + handle_wall, handle_center_z, handle_open_w, handle_open_h);
    }
}

union() {
    mug_body();
    handle();
}

$fn = 128;

// Mug dimensions
outer_d   = 80;
inner_d   = 70;
mug_h     = 90;
bottom_t  = 6;

// Handle inner opening dimensions
handle_open_w = 25;   // radial width
handle_open_h = 30;   // vertical height

// Handle thickness
handle_t = 5;

// Derived radii
outer_r = outer_d / 2;
inner_r = inner_d / 2;

// Handle outer dimensions
handle_outer_w = handle_open_w + handle_t;
handle_outer_h = handle_open_h + 2 * handle_t;

// Placement
handle_center_z = mug_h / 2;
attach_overlap = 1.0;

// 2D D-shape on XY plane:
// flat side at x = x_left, rounded side toward +X
module d_shape_2d(x_left, y_center, total_w, total_h) {
    r = total_h / 2;
    rect_w = total_w - r;
    union() {
        translate([x_left, y_center - r])
            square([rect_w, total_h], center = false);
        translate([x_left + rect_w, y_center])
            circle(r = r);
    }
}

module mug_body() {
    difference() {
        cylinder(h = mug_h, r = outer_r);
        translate([0, 0, bottom_t])
            cylinder(h = mug_h - bottom_t + 0.01, r = inner_r);
    }
}

module handle() {
    rotate([90, 0, 0]) {
        difference() {
            linear_extrude(height = handle_t, center = true)
                d_shape_2d(outer_r - attach_overlap, handle_center_z, handle_outer_w + attach_overlap, handle_outer_h);

            linear_extrude(height = handle_t + 2, center = true)
                d_shape_2d(outer_r + handle_t, handle_center_z, handle_open_w, handle_open_h);
        }
    }
}

union() {
    mug_body();
    handle();
}

$fn = 128;

// Mug dimensions
outer_d   = 80;
inner_d   = 70;
mug_h     = 90;
bottom_t  = 6;

// Handle opening (clear space)
handle_open_w = 25;   // width in radial direction
handle_open_h = 30;   // height in Z direction

// Handle thickness / depth
handle_t = 5;         // band thickness and Y extrusion thickness

// Derived
outer_r = outer_d / 2;
inner_r = inner_d / 2;

handle_outer_h = handle_open_h + 2 * handle_t;   // 40
handle_outer_w = handle_open_w + handle_t;       // 30
handle_center_z = mug_h / 2;

// 2D D-shape with flat side on the left, round side on the right
module d_shape_2d(total_w, total_h) {
    r = total_h / 2;
    rect_w = total_w - r;
    union() {
        translate([0, -r])
            square([rect_w, total_h], center = false);
        translate([rect_w, 0])
            circle(r = r);
    }
}

module mug_body() {
    difference() {
        cylinder(h = mug_h, r = outer_r);
        translate([0, 0, bottom_t])
            cylinder(h = mug_h - bottom_t + 0.01, r = inner_r);
    }
}

module handle() {
    // Put the D shape in XZ plane and extrude along Y.
    // Flat side intersects the mug body to guarantee a solid manifold union.
    translate([outer_r - handle_t, 0, handle_center_z])
    rotate([90, 0, 0])
    difference() {
        linear_extrude(height = handle_t, center = true)
            d_shape_2d(handle_outer_w, handle_outer_h);

        translate([handle_t, 0, 0])
            linear_extrude(height = handle_t + 2, center = true)
                d_shape_2d(handle_open_w, handle_open_h);
    }
}

union() {
    mug_body();
    handle();
}