$fn = 64;

// --- Parameters ---
cable_diameter = 6;     // Size of the cable to hold
head_width = 36;        // Overall width parameter for cutouts

module dragon_head() {
    difference() {
        union() {
            // Main Head / Cheeks
            hull() {
                translate([-10, 0, 15]) sphere(r=18);
                translate([10, 0, 12]) sphere(r=14);
            }

            // Top of Head
            hull() {
                translate([-10, 0, 15]) sphere(r=18);
                translate([0, 0, 28]) sphere(r=15);
            }

            // Upper Jaw / Snout
            hull() {
                translate([0, 0, 28]) sphere(r=15);
                translate([25, 0, 28]) sphere(r=10);
                translate([38, 0, 26]) sphere(r=5);
            }

            // Lower Jaw (rests on the desk)
            hull() {
                translate([-5, 0, 5]) sphere(r=14);
                translate([25, 0, 6]) sphere(r=8);
                translate([35, 0, 8]) sphere(r=4);
            }

            // Horns
            for(side = [-1, 1]) {
                // Primary horns
                hull() {
                    translate([-5, side*10, 25]) sphere(r=4);
                    translate([-25, side*18, 45]) sphere(r=1);
                }
                // Secondary small horns
                hull() {
                    translate([-10, side*14, 15]) sphere(r=3);
                    translate([-22, side*22, 25]) sphere(r=1);
                }
            }

            // Brow Ridges
            for(side = [-1, 1]) {
                hull() {
                    translate([8, side*8, 32]) sphere(r=4);
                    translate([20, side*8, 32]) sphere(r=3);
                }
            }

            // Central Scales / Spikes
            for(i = [0:2]) {
                hull() {
                    translate([-5 + i*10, 0, 28]) sphere(r=3);
                    translate([-12 + i*10, 0, 42 - i*2]) sphere(r=1);
                }
            }
        }

        // --- Subtractions ---

        // Cable Resting Channel (Throat)
        // Positioned deep in the mouth to hold the cable securely
        translate([8, 0, 16]) rotate([90, 0, 0])
            cylinder(h=head_width + 20, r=cable_diameter/2, center=true);

        // Mouth Opening / Cable Insertion Slot
        // Creates a V-shape opening from the throat to the front
        hull() {
            // Slightly narrower than cable for a "snap" fit
            translate([8, 0, 16]) rotate([90, 0, 0])
                cylinder(h=head_width + 20, r=(cable_diameter * 0.85)/2, center=true);
            
            // Open wide at the front lips
            translate([45, 0, 26]) cube([1, head_width + 20, 1], center=true); // Upper lip limit
            translate([45, 0, 10]) cube([1, head_width + 20, 1], center=true); // Lower lip limit
        }

        // Eye Sockets
        for(side = [-1, 1]) {
            translate([14, side*11, 26]) sphere(r=3.5);
        }

        // Nostrils
        for(side = [-1, 1]) {
            translate([35, side*4, 25]) rotate([0, 50, 0]) cylinder(h=10, r=1.5);
        }

        // Flatten the bottom for 3D printing
        // Cuts off everything below Z=0 to ensure perfect bed adhesion
        translate([0, 0, -50]) cube([150, 150, 100], center=true);
    }
}

// Render the model
dragon_head();