カップに向かって玉をころがす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.setupScene()
self.createPlateWithHole()
self.createCamera()
self.createLight()
}
func setupScene() {
var w = CGRectGetMaxX(self.view.bounds)
var sceneView = SCNView(frame: CGRect(x: 0, y: 0, width: w, height: w))
sceneView.center = CGPoint(x: CGRectGetMidX(self.view.bounds), y: CGRectGetMidY(self.view.bounds))
sceneView.backgroundColor = UIColor(hue: 0.3, saturation: 0.5, brightness: 0.8, alpha: 1)
sceneView.scene = SCNScene()
self.view.addSubview(sceneView)
self.scene = sceneView.scene
self.scene?.physicsWorld.speed = 2.0
}
func createPlateWithHole() {
var plate = SCNBox(width: 20, height: 0.5, length: 30, chamferRadius: 1)
plate.firstMaterial?.diffuse.contents = UIColor(hue: 0.9, saturation: 0.5, brightness: 1, alpha: 1)
var plateNode = SCNNode(geometry: plate)
plateNode.position = SCNVector3(x: 0, y: 0, z: –10)
plateNode.physicsBody = SCNPhysicsBody.staticBody()
self.scene?.rootNode.addChildNode(plateNode)
var partsA = SCNBox(width: 7, height: 0.5, length: 10, chamferRadius: 1)
var partsANode = SCNNode(geometry: partsA)
partsANode.position = SCNVector3(x: 6.5, y: 0, z: –30)
partsANode.physicsBody = SCNPhysicsBody.staticBody()
self.scene?.rootNode.addChildNode(partsANode)
var partsB = SCNBox(width: 7, height: 0.5, length: 10, chamferRadius: 1)
var partsBNode = SCNNode(geometry: partsB)
partsBNode.position = SCNVector3(x: –6.5, y: 0, z: –30)
partsBNode.physicsBody = SCNPhysicsBody.staticBody()
self.scene?.rootNode.addChildNode(partsBNode)
var hole = SCNTube(innerRadius: 3, outerRadius: 8, height: 0.5)
var holeNode = SCNNode(geometry: hole)
holeNode.position = SCNVector3(x: 0, y: 0, z: –30)
holeNode.name = “hole”
holeNode.physicsBody = SCNPhysicsBody.staticBody()
holeNode.physicsBody?.physicsShape = SCNPhysicsShape(geometry: hole, options: [SCNPhysicsShapeTypeKey: SCNPhysicsShapeTypeConcavePolyhedron])
self.scene?.rootNode.addChildNode(holeNode)
}
func createCamera() {
var camera = SCNNode()
camera.camera = SCNCamera()
camera.position = SCNVector3(x: 0, y: 20, z: 30)
self.scene?.rootNode.addChildNode(camera)
camera.constraints = [SCNLookAtConstraint(target: self.scene!.rootNode.childNodeWithName(“hole”, recursively: false)!)]
}
func createLight() {
var light = SCNLight()
light.type = SCNLightTypeOmni
var lightNode = SCNNode()
lightNode.light = light;
lightNode.position = SCNVector3(x: 0, y: 20, z: 10)
self.scene?.rootNode.addChildNode(lightNode)
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
var ball = SCNSphere(radius: 1)
ball.firstMaterial?.diffuse.contents = UIColor(hue: 0.7, saturation: 0.7, brightness: 1, alpha: 1)
var ballNode = SCNNode(geometry: ball)
self.scene?.rootNode.addChildNode(ballNode)
ballNode.physicsBody = SCNPhysicsBody.dynamicBody()
ballNode.physicsBody?.velocity = SCNVector3(x: 0, y: 10, z: –10)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}