たこ焼きをひっくり返すiPhoneアプリのサンプルコードを描いてみます。
import UIKit
import SceneKit
class ViewController: UIViewController {
weak var sceneView : SCNView?
override func viewDidLoad() {
super.viewDidLoad()
setupScene()
createIronPlate()
createTakoyaki()
createCamera()
}
func setupScene() {
let sv = SCNView(frame: view.bounds)
sv.backgroundColor = UIColor(hue: 0, saturation: 0.3, brightness: 0.9, alpha: 1)
sv.scene = SCNScene()
sv.autoenablesDefaultLighting = true
self.view.addSubview(sv)
self.sceneView = sv
}
func createIronPlate() {
let plate = SCNBox(width: 40, height: 1, length: 16, chamferRadius: 0.2)
plate.firstMaterial?.diffuse.contents = UIColor.blackColor()
let plateNode = SCNNode(geometry: plate)
self.sceneView?.scene?.rootNode.addChildNode(plateNode)
}
func createTakoyaki() {
[Int](0…9).each { i in
let ball = SCNSphere(radius: 2)
ball.firstMaterial?.diffuse.contents = {
let l = CALayer()
l.frame = CGRect(x: 0, y: 0, width: 200, height: 200)
l.backgroundColor = UIColor(hue: 0.1, saturation: 0.2, brightness: 1, alpha: 1).CGColor
let sub = CALayer()
sub.frame = CGRect(x: 0, y: 0, width: 200, height: 100)
sub.backgroundColor = UIColor(hue: 0.1, saturation: 0.8, brightness: 0.7, alpha: 1).CGColor
l.addSublayer(sub)
return l
}()
let takoyaki = SCNNode(geometry: ball)
takoyaki.name = “takoyaki”
let x = 16 – 8 * Float(i % 5)
let z = 7 * Float(i/5) – 3.5
takoyaki.position = SCNVector3(x: x, y: 0, z: z)
self.sceneView?.scene?.rootNode.addChildNode(takoyaki)
}
}
func createCamera() {
let camera = SCNNode()
camera.camera = SCNCamera()
camera.position = SCNVector3(x: –17, y: 30, z: 60)
camera.rotation = SCNVector4(x: 1, y: 0.5, z: 0, w: –0.5)
self.sceneView?.scene?.rootNode.addChildNode(camera)
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
let p = touches.anyObject()!.locationInView(self.sceneView)
if let hit = self.sceneView?.hitTest(p, options: [SCNHitTestSortResultsKey : true])?.first as? SCNHitTestResult {
if hit.node.name == “takoyaki” {
hit.node.runAction(SCNAction.rotateByAngle(CGFloat(M_PI), aroundAxis: SCNVector3(x: 1, y: 0, z: 0), duration: 0.4))
}
}
}
}
extension Array {
func each(doit:(T) -> Void) { for i in self {doit(i)} }
}