てるてる坊主

てるてる坊主で雨をなんとかする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, SCNSceneRendererDelegate {

    weak var sceneView : SCNView?

    var rain = false

    

    override func viewDidLoad() {

        super.viewDidLoad()

        setupScene()

        createSky()

        createTeruTeruBouzu()

        createLight()

        createCamera()

    }

    func setupScene() {

        let sv = SCNView(frame: view.bounds)

        sv.scene = SCNScene()

        sv.allowsCameraControl = true

        sv.delegate = self

        view.addSubview(sv)

        

        sceneView = sv

    }

    

    func createSky() {

        let sky = SCNCylinder(radius: 20, height: 0.2)

        sky.firstMaterial?.diffuse.contents = UIColor(hue: 0.5, saturation: 0.4, brightness: 1, alpha: 1)

        let skyNode = SCNNode(geometry: sky)

        skyNode.name = “sky”

        skyNode.rotation = SCNVector4(x: 1, y: 0, z: 0, w: Float(M_PI) * 0.5)

        skyNode.scale = SCNVector3(x: 1.4, y: 1, z: 1)

        skyNode.position = SCNVector3(x: 0, y: 0, z: –20)

        sceneView?.scene?.rootNode.addChildNode(skyNode)

        

        let graysky = SCNCylinder(radius: 20, height: 0.2)

        graysky.firstMaterial?.diffuse.contents = UIColor(hue: 0.5, saturation: 0.4, brightness: 0.3, alpha: 1)

        let grayskyNode = SCNNode(geometry: graysky)

        grayskyNode.position = SCNVector3(x: 0, y: –0.2, z: 0)

        skyNode.addChildNode(grayskyNode)

    }

    

    func createTeruTeruBouzu() {

        let bouzu = SCNNode()

        bouzu.name = “bouzu”

        bouzu.position = SCNVector3(x: 8, y: 4, z: 2)

        sceneView?.scene?.rootNode.addChildNode(bouzu)

        

        let head = SCNSphere(radius: 1)

        head.firstMaterial?.diffuse.contents = UIColor(white: 1, alpha: 1)

        let headNode = SCNNode(geometry: head)

        headNode.position = SCNVector3(x: 0, y: 0.7, z: 0)

        bouzu.addChildNode(headNode)

        

        let body = SCNCone(topRadius: 0.5, bottomRadius: 1.5, height: 2)

        body.firstMaterial?.diffuse.contents = UIColor(white: 1, alpha: 1)

        let bodyNode = SCNNode(geometry: body)

        bodyNode.position = SCNVector3(x: 0, y: –1, z: 0)

        bouzu.addChildNode(bodyNode)

        

        for i in 0…1 {

            let eye = SCNSphere(radius: 0.15)

            eye.firstMaterial?.diffuse.contents = UIColor.blackColor()

            let eyeNode = SCNNode(geometry: eye)

            eyeNode.position = SCNVector3(x: i==0 ? 0.5 : –0.5, y:0, z:1)

            headNode.addChildNode(eyeNode)

        }

        

        let mouth = SCNSphere(radius: 0.25)

        mouth.firstMaterial?.diffuse.contents = UIColor(hue: 0, saturation: 0.4, brightness: 0.7, alpha: 1)

        let mouthNode = SCNNode(geometry: mouth)

        mouthNode.position = SCNVector3(x: 0, y: –0.5, z: 1)

        mouthNode.scale = SCNVector3(x: 0.6, y: 1, z: 0.2)

        headNode.addChildNode(mouthNode)

    }

    

    func createLight() {

        

        let light0 = SCNLight()

        light0.type = SCNLightTypeAmbient

        light0.color = UIColor(white: 0.4, alpha: 1)

        let light0Node = SCNNode()

        light0Node.position = SCNVector3(x: 0, y: 30, z: 30)

        light0Node.light = light0

        sceneView?.scene?.rootNode.addChildNode(light0Node)

        

        let light = SCNLight()

        light.type = SCNLightTypeDirectional

        light.color = UIColor(white: 0.6, alpha: 1)

        let lightNode = SCNNode()

        lightNode.position = SCNVector3(x: 0, y: 0, z: 80)

        lightNode.light = light

        sceneView?.scene?.rootNode.addChildNode(lightNode)

    }

    

    func createCamera() {

        let camera = SCNNode()

        camera.camera = SCNCamera()

        camera.position = SCNVector3(x: 0, y: 0, z: 25)

        sceneView?.scene?.rootNode.addChildNode(camera)

    }

    

    override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {

        if let bouzu = sceneView?.scene?.rootNode.childNodeWithName(“bouzu”, recursively: false) {

            if let sky = sceneView?.scene?.rootNode.childNodeWithName(“sky”, recursively: false) {

                bouzu.runAction(SCNAction.rotateByAngle(CGFloat(M_PI), aroundAxis: SCNVector3(x: 0, y: 0, z: 1), duration: 1.0))

                sky.runAction(SCNAction.rotateByAngle(CGFloat(M_PI), aroundAxis: SCNVector3(x: 1, y: 0, z: 0), duration: 1.0))

                self.rain = !self.rain

                self.sceneView?.playing = true

        }}

    }

    

    func renderer(aRenderer: SCNSceneRenderer, updateAtTime time: NSTimeInterval) {

        if (self.rain) {

            let x = arc4random() % 20

            let rain = SCNSphere(radius: 0.15)

            rain.firstMaterial?.diffuse.contents = UIColor(hue: 0.5, saturation: 0.3, brightness: 1, alpha: 0.7)

            let rainNode = SCNNode(geometry: rain)

            rainNode.name = “rain”

            rainNode.position = SCNVector3(x: Float(x) – 10, y: 8, z: 4)

            sceneView?.scene?.rootNode.addChildNode(rainNode)

            rainNode.physicsBody = SCNPhysicsBody.dynamicBody()

        }

        

        sceneView?.scene?.rootNode.childNodes

            .filter {($0 as! SCNNode).name == “rain” && ($0 as! SCNNode).position.y < –10}

            .map{ ($0 as! SCNNode).removeFromParentNode() }

    }

}