$fn = 64;

// --- Parameters ---
base_thickness = 6;
toe_size_large = 20;
toe_size_small = 18;
hook_radius = 5;
hook_length = 32;
hook_angle = 45; // Angle upwards from the wall
hole_spacing = 26;
screw_dia = 4.5;
head_dia = 8.5;

module paw_base() {
    // Main pad (metacarpal) - created with two overlapping hulls for a top dip
    union() {
        hull() {
            translate([-12, 6, 0]) cylinder(d=26, h=base_thickness);
            translate([0, -10, 0]) cylinder(d=28, h=base_thickness);
        }
        hull() {
            translate([12, 6, 0]) cylinder(d=26, h=base_thickness);
            translate([0, -10, 0]) cylinder(d=28, h=base_thickness);
        }
        // Center fill
        translate([0, -2, 0]) cylinder(d=28, h=base_thickness);
    }
    
    // Toe pads (digital pads)
    // Far left toe
    translate([-26, 20, 0]) 
        rotate([0, 0, 35]) 
        scale([0.8, 1.15, 1]) 
        cylinder(d=toe_size_small, h=base_thickness);
        
    // Inner left toe
    translate([-10, 32, 0]) 
        rotate([0, 0, 10]) 
        scale([0.8, 1.15, 1]) 
        cylinder(d=toe_size_large, h=base_thickness);
        
    // Inner right toe
    translate([10, 32, 0]) 
        rotate([0, 0, -10]) 
        scale([0.8, 1.15, 1]) 
        cylinder(d=toe_size_large, h=base_thickness);
        
    // Far right toe
    translate([26, 20, 0]) 
        rotate([0, 0, -35]) 
        scale([0.8, 1.15, 1]) 
        cylinder(d=toe_size_small, h=base_thickness);
}

module key_hook() {
    // Angled peg protruding from the bottom center
    translate([0, -10, base_thickness - 1]) {
        // Fillet at the base for strength
        cylinder(r1=hook_radius * 1.8, r2=hook_radius, h=4);
        
        // Main hook shaft
        rotate([-hook_angle, 0, 0]) {
            cylinder(r=hook_radius, h=hook_length);
            // Retaining knob at the end
            translate([0, 0, hook_length]) 
                sphere(r=hook_radius * 1.4);
        }
    }
}

module mounting_holes() {
    // Left hole
    translate([-hole_spacing/2, 4, -1]) {
        cylinder(d=screw_dia, h=base_thickness + 2);
        translate([0, 0, base_thickness - 2]) 
            cylinder(d1=screw_dia, d2=head_dia, h=2.1);
        translate([0, 0, base_thickness + 0.1]) 
            cylinder(d=head_dia, h=2);
    }
    // Right hole
    translate([hole_spacing/2, 4, -1]) {
        cylinder(d=screw_dia, h=base_thickness + 2);
        translate([0, 0, base_thickness - 2]) 
            cylinder(d1=screw_dia, d2=head_dia, h=2.1);
        translate([0, 0, base_thickness + 0.1]) 
            cylinder(d=head_dia, h=2);
    }
}

// --- Final Assembly ---
difference() {
    union() {
        paw_base();
        key_hook();
    }
    mounting_holes();
}