A Reusable SCNNode SubClass With An SCNSphere Geometry

Sphere.swift

//
//  Sphere.swift
// 
//
//  Created by Josh Robbins on 24/02/2018.
//  Copyright © 2018 BlackMirror. All rights reserved.
//

import Foundation
import SceneKit

class Sphere: SCNNode{
    
    /// Creates An SCNSphere With Either A Single Colour Or Image For It's Material
    /// (Either A Colour Or UIImage Must Be Input)
    /// - Parameters:
    ///  - radius: Optional CGFloat (Defaults To 30cm)
    /// - content: Any (UIColor Or UIImage)
    init(radius: CGFloat = 0.3, content: Any) {
        
        super.init()
        
        //1. Create The Sphere Geometry With Our Radius Parameter
        self.geometry = SCNSphere(radius: radius)
        
        //2. Create A New Material
        let material = SCNMaterial()
        
        //3. If A Colour Has Not Be Set The Then Material Will Be A UIImage
        if let colour = content as? UIColor{
            
            //The Material Will Be A UIColor
            material.diffuse.contents = colour
            
        }else if let image = content as? UIImage{
            
            //The Material Will Be A UIImage
            material.diffuse.contents = image
            
        }else{
            
            //Set Our Material Colour To Cyan
            material.diffuse.contents = UIColor.cyan
            
        }
        
        //4. Set The Material Of The Sphere
        self.geometry?.firstMaterial = material
        
    }
    
     required init?(coder aDecoder: NSCoder) { fatalError("Sphere Node Coder Not Implemented") }
    
}