くるっと渦巻き状に配置したドミノを倒す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 scene : SCNScene?
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.lightGrayColor()
var sceneView = SCNView(frame: CGRectMake(0, 0, 320, 320))
sceneView.backgroundColor = UIColor.greenColor()
self.view.addSubview(sceneView)
sceneView.center = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.bounds))
sceneView.scene = SCNScene()
self.scene = sceneView.scene
self.createPlate()
self.createCamera()
self.createDomino()
var light = SCNLight()
light.type = SCNLightTypeDirectional
light.color = UIColor.whiteColor()
var lightNode = SCNNode()
lightNode.light = light
lightNode.position = SCNVector3(x: 0, y: 50, z: 100)
if let target = self.scene?.rootNode.childNodeWithName(“plate”, recursively: false) {
lightNode.constraints = [SCNLookAtConstraint(target: target)]
}
self.scene?.rootNode.addChildNode(lightNode)
}
func createPlate()
{
var s = 30.0 as CGFloat
var box = SCNBox(width: s, height: s * 0.05, length: s, chamferRadius: s*0.2)
box.firstMaterial?.diffuse.contents = UIColor.brownColor()
var plate = SCNNode(geometry: box)
plate.name = “plate”
plate.position = SCNVector3(x: 0, y: –10, z: 0)
self.scene?.rootNode.addChildNode(plate)
plate.physicsBody = SCNPhysicsBody.staticBody()
}
func createCamera()
{
var cameraNode = SCNNode()
cameraNode.camera = SCNCamera()
cameraNode.position = SCNVector3(x: 0, y: 10, z: 30)
if let target = self.scene?.rootNode.childNodeWithName(“plate”, recursively: false) {
cameraNode.constraints = [SCNLookAtConstraint(target: target)]
}
self.scene?.rootNode.addChildNode(cameraNode)
}
func createDomino()
{
for i in 0…32 {
var angle = Float(M_PI/12.0) * Float(i)
var r = 4.0 + 0.3 * Float(i)
var b = SCNBox(width: 2, height: 4, length: 0.4, chamferRadius: 0)
b.firstMaterial?.diffuse.contents = UIColor.redColor()
var node = SCNNode(geometry: b)
node.name = “domino\(i)“
node.rotation = SCNVector4(x: 0, y: –1, z: 0, w: angle)
node.position = SCNVector3(x: r * cos(angle), y: –8, z: r * sin(angle))
self.scene?.rootNode.addChildNode(node)
node.physicsBody = SCNPhysicsBody.dynamicBody()
}
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
var domino = self.scene?.rootNode.childNodeWithName(“domino0”, recursively: false)
domino?.physicsBody?.applyForce(SCNVector3(x: 0, y: 0, z: 5), atPosition: SCNVector3(x: 0, y: 1, z: 0), impulse: true)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}