$fn = 64;

// --- Parameters ---
platform_diameter = 85;      // Sized for standard figures and Funko Pops
platform_thickness = 4;      // Thickness of the rotating top plate
base_diameter = 75;          // Slightly smaller base for a sleek look
base_thickness = 6;          // Sturdy base plate

pin_diameter = 12;           // Center axle diameter
pin_height = 10;             // Center axle height
clearance = 0.5;             // Tolerance for smooth rotation (0.25mm per side)

// --- Assembly Layout ---
// The parts are printed side-by-side to avoid supports.
// The platform is printed upside down for a perfectly smooth display surface.

// Left: Stationary Base
translate([-platform_diameter/2 - 5, 0, 0])
    turntable_base();

// Right: Rotating Platform
translate([platform_diameter/2 + 5, 0, 0])
    turntable_platform();

// --- Modules ---
module turntable_base() {
    union() {
        // Main base plate
        cylinder(d=base_diameter, h=base_thickness);
        
        // Thrust bearing (raised ring to reduce friction)
        translate([0, 0, base_thickness])
            cylinder(d=pin_diameter + 10, h=1);
            
        // Center pivot pin (straight section)
        translate([0, 0, base_thickness])
            cylinder(d=pin_diameter, h=pin_height - 1.5);
            
        // Chamfer on pin for easy insertion of the platform
        translate([0, 0, base_thickness + pin_height - 1.5])
            cylinder(d1=pin_diameter, d2=pin_diameter - 2, h=1.5);
    }
}

module turntable_platform() {
    // Printed upside down
    difference() {
        // Main platform body (top plate + hub/rim height)
        cylinder(d=platform_diameter, h=platform_thickness + pin_height);
        
        // Center socket for the pivot pin
        // Made slightly deeper than the exposed pin so it rests on the thrust bearing
        translate([0, 0, platform_thickness])
            cylinder(d=pin_diameter + clearance, h=pin_height + 1);
            
        // Friction reduction cavity
        // Removes material between the inner hub and outer rim
        translate([0, 0, platform_thickness])
            difference() {
                cylinder(d=platform_diameter - 12, h=pin_height + 1);
                translate([0, 0, -1])
                    cylinder(d=pin_diameter + 15, h=pin_height + 3);
            }
    }
}