この冬のあれが鈴だと聞いたので、鈴を表示する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()
self.setupScene()
self.createBell()
self.createCamera()
}
func setupScene() {
let sv = SCNView(frame: self.view.bounds)
sv.backgroundColor = UIColor(hue: 0, saturation: 0.7, brightness: 0.5, alpha: 1)
sv.scene = SCNScene()
sv.autoenablesDefaultLighting = true
self.view.addSubview(sv)
self.sceneView = sv
//body
let w : CGFloat = 40.0
let h : CGFloat = 60.0
for i in 0..<4 {
switch i {
case 0…1:
let bar = SCNBox(width: w, height: 2, length: 2, chamferRadius: 1)
let barNode = SCNNode(geometry: bar)
barNode.position = SCNVector3(x:0, y: 0, z: (Float(i)-0.5) * Float(h))
barNode.physicsBody = SCNPhysicsBody.staticBody()
self.sceneView?.scene?.rootNode.addChildNode(barNode)
default: //case 2…3:
let bar = SCNBox(width: 2, height: 2, length: h, chamferRadius: 1)
let barNode = SCNNode(geometry: bar)
barNode.position = SCNVector3(x: (Float(i-2)-0.5) * Float(w), y: 0, z: 0)
barNode.physicsBody = SCNPhysicsBody.staticBody()
self.sceneView?.scene?.rootNode.addChildNode(barNode)
}
}
}
func createBell() {
let node = SCNNode()
self.sceneView?.scene?.rootNode.addChildNode(node)
let bell = SCNSphere(radius: 10)
bell.segmentCount = 48 * 3
bell.firstMaterial?.diffuse.contents = UIColor(white: 0.9, alpha: 1)
let bellNode = SCNNode(geometry: bell)
bellNode.name = “bell”
bellNode.transform = SCNMatrix4MakeScale(1.0, 0.11, 0.8)
node.addChildNode(bellNode)
for i in 0..<2 {
let hole = SCNCylinder(radius: 1.3, height: 0.3)
hole.firstMaterial?.diffuse.contents = UIColor(white: 0.1, alpha: 1)
let holeNode = SCNNode(geometry: hole)
holeNode.position = SCNVector3(x: –5 + Float(i) * 10, y: 1, z: 0)
node.addChildNode(holeNode)
}
let line = SCNBox(width: 10, height: 0.2, length: 0.4, chamferRadius: 0)
line.firstMaterial?.diffuse.contents = UIColor(white: 0.1, alpha: 1)
let lineNode = SCNNode(geometry: line)
lineNode.position = SCNVector3(x: 0, y: 1, z: 0)
node.addChildNode(lineNode)
node.physicsBody = SCNPhysicsBody.dynamicBody()
node.physicsBody?.velocityFactor = SCNVector3(x: 1, y: 0, z: 1)
node.physicsBody?.applyForce(SCNVector3(x: 10, y: 10, z: 0), impulse: true)
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
let p = touches.anyObject()!.locationInView(self.sceneView)
if let hit : SCNHitTestResult = self.sceneView?.hitTest(p, options: [SCNHitTestSortResultsKey : true])?.first as? SCNHitTestResult {
if hit.node.name == “bell” {
let p0 = hit.node.parentNode!.presentationNode().position
let p1 = hit.worldCoordinates
let v = SCNVector3(x: 5.0*(p0.x – p1.x), y: 0, z: 5.0*(p0.z – p1.z))
hit.node.parentNode?.physicsBody?.applyForce(v, atPosition: SCNVector3(x: p1.x, y: 0, z: p1.z), impulse: true)
}
}
}
func createCamera() {
let camera = SCNNode()
camera.camera = SCNCamera()
camera.position = SCNVector3(x: 0, y: 70, z: 0)
camera.rotation = SCNVector4(x: 1, y: 0, z: 0, w: Float(-M_PI)/2.0)
self.sceneView?.scene?.rootNode.addChildNode(camera)
}
}