Shirts button different sides

ViewController.swift

//
//  ViewController.swift
//  ShirtsButtonDifferentSides
//
//  Created by MizushimaYusuke on 9/1/15.
//  Copyright (c) 2015 MizushimaYusuke. All rights reserved.
//

import UIKit
import SceneKit

class ViewController: UIViewController {
    
    weak var sceneView : SCNView?

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

    func setupScene() {
        let sv = SCNView(frame: view.bounds)
        sv.backgroundColor = UIColor.orangeColor()
        sv.scene = SCNScene()
        sv.autoenablesDefaultLighting = true
        sv.allowsCameraControl = true
        view.addSubview(sv)
        sceneView = sv
    }
    
    func createShirts() {
        
        let leftNum = Int(arc4random() % 32)
        for i in 0..<32 {
            let x = Float(i % 4) * 3.0
            let y = Float(i / 4) * 3.0
            let shirt = createShirtsRightButton(i == leftNum, color: UIColor.greenColor())
            shirt.position = SCNVector3(x: x, y: y, z: 0)
        }
    }

    func createShirtsRightButton(isRight:Bool, color:UIColor) -> SCNNode {
        let shirt = SCNNode()
        shirt.name = isRight ? "R" : "L"
        
        let s : CGFloat = 1
        let trapezoid = UIBezierPath()
        trapezoid.moveToPoint(CGPoint(x: -s * 0.8, y: s))
        trapezoid.addLineToPoint(CGPoint(x: s * 0.8, y: s))
        trapezoid.addLineToPoint(CGPoint(x: s, y: -s))
        trapezoid.addLineToPoint(CGPoint(x: -s, y: -s))
        trapezoid.closePath()
        
        let body = SCNShape(path: trapezoid, extrusionDepth: s)
        body.firstMaterial?.diffuse.contents = color
        let bodyNode = SCNNode(geometry: body)
        shirt.addChildNode(bodyNode)
        
        let arm = SCNBox(width: 1.2, height: 0.5, length: 0.5, chamferRadius: 0.1)
        arm.firstMaterial?.diffuse.contents = color
        for i in 0...1 {
            let armNode = SCNNode(geometry: arm)
            armNode.name = "arm"
            armNode.pivot = SCNMatrix4MakeTranslation(i==0 ? 0.5 : -0.5, 0, 0)
            armNode.position = SCNVector3Make(i==0 ? -0.8 : 0.8, 0.7, 0)
            armNode.rotation = SCNVector4(x: 0, y: 0, z: 1, w: Float(M_PI) * (i==0 ? 0.3 : -0.3))
            shirt.addChildNode(armNode)
        }
        
        let trapezoid2 = UIBezierPath()
        if isRight {
            trapezoid2.moveToPoint(CGPoint(x: -s * 0.2, y: s))
            trapezoid2.addLineToPoint(CGPoint(x: s * 0.8, y: s))
            trapezoid2.addLineToPoint(CGPoint(x: s, y: -s))
            trapezoid2.addLineToPoint(CGPoint(x: -s * 0.2, y: -s))
        } else {
            trapezoid2.moveToPoint(CGPoint(x: -s * 0.8, y: s))
            trapezoid2.addLineToPoint(CGPoint(x: s * 0.2, y: s))
            trapezoid2.addLineToPoint(CGPoint(x: s * 0.2, y: -s))
            trapezoid2.addLineToPoint(CGPoint(x: -s, y: -s))
        }
        trapezoid2.closePath()
        
        let cloth = SCNShape(path: trapezoid2, extrusionDepth: 0.15)
        cloth.firstMaterial?.diffuse.contents = color
        cloth.firstMaterial?.specular.contents = UIColor.yellowColor()
        cloth.firstMaterial?.shininess = 1
        let clothNode = SCNNode(geometry: cloth)
        clothNode.pivot = SCNMatrix4MakeTranslation(isRight ? Float(s) * 0.9 : -Float(s) * 0.9 , 0, 0)
        clothNode.position = SCNVector3Make(isRight ? Float(s) * 0.9 : -Float(s) * 0.9, 0, 0.51)
        shirt.addChildNode(clothNode)

        
        for i in 0...4 {
            let b = SCNBox(width: 0.2, height: 0.2, length: 0.1, chamferRadius: 0.1)
            b.firstMaterial?.diffuse.contents = UIColor.darkGrayColor()
            let button = SCNNode(geometry: b)
            button.position = SCNVector3(x: 0, y: Float(i) * 0.25 - Float(s) * 0.8, z: 0.6)
            shirt.addChildNode(button)
        }
        
        sceneView?.scene?.rootNode.addChildNode(shirt)
        
        return shirt
    }

    override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
        if let touch = touches.first as? UITouch {
            let p = touch.locationInView(self.sceneView)
            if let hit = self.sceneView?.hitTest(p, options: [SCNHitTestSortResultsKey:true])?.first as? SCNHitTestResult {
                if hit.node.parentNode!.name == "R" {
                    // clear!
                    hit.node.parentNode!.childNodes
                        .filter {($0 as! SCNNode).name == "arm"}
                        .foreach { (i, e) -> Void in
                            e.runAction(SCNAction.rotateByAngle(CGFloat(M_PI) * (i==0 ? 0.6 : -0.6), aroundAxis: SCNVector3(x: 0, y: 0, z: 1), duration: 0.3))}
                }
            }
        }
    }
}

extension Array {
    func foreach(doit:(Int, T) -> Void) { for (i, e) in enumerate(self) {doit(i, e)} }
}