//
//  ViewController.swift
//  SpiralRect
//
//  Created by MizushimaYusuke on 2016/09/29.
//  Copyright © 2016 MizushimaYusuke. All rights reserved.
//

import UIKit
import SpriteKit

class ViewController: UIViewController {

    weak var scene: SKScene?

    override func viewDidLoad() {
        super.viewDidLoad()
        setupScene()
        createRectangles()
    }

    func setupScene() {
        let sv = SKView(frame: view.bounds)
        let s = SKScene(size: sv.frame.size)
        sv.presentScene(s)
        view.addSubview(sv)
        scene = s
    }

    func createRectangles() {
        var preNode: SKNode?
        let s = 30.0
        for i in 0...20 {
            let r = SKSpriteNode(color: UIColor.yellow, size: CGSize(width: s, height: s))

            if i % 2 == 0 {
                if i != 0 {
                    r.position = CGPoint(x: -s * 0.8, y: -s * 0.8)
                }
                r.anchorPoint = CGPoint(x: 0.1, y: 0.1)
                r.run(SKAction.repeatForever(SKAction.rotate(byAngle: CGFloat(M_PI), duration: 10.0)))
            } else {
                r.position = CGPoint(x: s * 0.8, y: s * 0.8)
                r.anchorPoint = CGPoint(x: 0.9, y: 0.9)

                r.run(SKAction.repeatForever(SKAction.rotate(byAngle: -CGFloat(M_PI), duration: 5.0)))
            }
            if preNode != nil {
                preNode?.addChild(r)
            } else {
                r.position = CGPoint(x: view.frame.midX, y: view.frame.midY)
                scene?.addChild(r)
            }
            preNode = r
        }
    }

}