$fn = 64;

// --- Parameters ---

// Cup dimensions
cup_radius = 35;
cup_height = 140;
wall_thickness = 3;

// Mounting block dimensions
block_width = 40;
block_depth = 16;
block_height = 50;
block_offset_z = 20; // Distance from top of cup to top of block

// Dovetail rail dimensions (Female slot for wall rail)
rail_opening_height = 25;
rail_inner_height = 35;
rail_depth = 6;

// --- Model ---

difference() {
    union() {
        // Main cylindrical body
        cylinder(r=cup_radius, h=cup_height);
        
        // Top rim reinforcement
        translate([0, 0, cup_height])
            rotate_extrude()
            translate([cup_radius, 0, 0])
            circle(r=wall_thickness);
        
        // Mounting block (Self-supporting with 45-degree bottom taper)
        translate([-block_width/2, cup_radius - 5, cup_height - block_height - block_offset_z])
        hull() {
            // Main rectangular block
            cube([block_width, block_depth + 5, block_height]);
            // Tapered base merging into the cup wall (eliminates need for supports)
            translate([0, 0, -(block_depth + 5)])
                cube([block_width, 0.1, 0.1]);
        }
    }
    
    // Cup inner cavity
    translate([0, 0, wall_thickness])
        cylinder(r=cup_radius - wall_thickness, h=cup_height + wall_thickness * 2);
    
    // Dovetail cutout (Horizontal slot to hang on rail)
    translate([0, cup_radius + block_depth, cup_height - (block_height/2) - block_offset_z])
    hull() {
        // Outer opening at the back face
        translate([0, 0, 0])
            cube([block_width + 2, 0.1, rail_opening_height], center=true);
        // Inner widened cavity
        translate([0, -rail_depth, 0])
            cube([block_width + 2, 0.1, rail_inner_height], center=true);
    }
}