horizontal bar

ViewController.swift

//
//  ViewController.swift
//  horizontalBar
//
//  Created by MizushimaYusuke on 9/16/15.
//  Copyright (c) 2015 MizushimaYusuke. All rights reserved.
//

import UIKit
import SceneKit

class ViewController: UIViewController {

    weak var sceneView : SCNView?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        setupScene()
        createBar()
        createDoll();
        createCamera()
    }
    
    func setupScene() {
        let sv = SCNView(frame: view.bounds)
        sv.scene = SCNScene()
        sv.backgroundColor = UIColor(hue: 0.34, saturation: 0.1, brightness: 1, alpha: 1)
        sv.autoenablesDefaultLighting = true
        sv.allowsCameraControl = true
        view.addSubview(sv)
        sceneView = sv
    }

    func createBar() {
        
        let pillar = SCNCylinder(radius: 0.2, height: 5)
        pillar.firstMaterial?.diffuse.contents = UIColor.lightGrayColor()
        pillar.firstMaterial?.specular.contents = UIColor.whiteColor()
        for i in 0...1 {
            let pillarNode = SCNNode(geometry: pillar)
            pillarNode.position = SCNVector3(x: i == 0 ? -2 : 2, y: 0, z: 0)
            pillarNode.physicsBody = SCNPhysicsBody.staticBody()
            self.sceneView?.scene?.rootNode.addChildNode(pillarNode)
        }
        
        let bar = SCNCylinder(radius: 0.1, height: 4)
        bar.name = "bar"
        bar.materials = pillar.materials
        let barNode = SCNNode(geometry: bar)
        barNode.rotation = SCNVector4(x: 0, y: 0, z: 1, w: Float(M_PI * 0.5))
        barNode.position = SCNVector3(x: 0, y: 2.3, z: 0)
        sceneView?.scene?.rootNode.addChildNode(barNode)
    }
    
    func createDoll() {
        let doll = SCNNode()
        doll.name = "doll"
        doll.position = SCNVector3(x: 0, y: 2, z: 0.3)
        let mt = SCNMaterial()
        mt.diffuse.contents = UIColor.grayColor()
        mt.specular.contents = UIColor.blueColor()
        
        
        let head = SCNSphere(radius: 0.4)
        head.materials = [mt]
        let headNode = SCNNode(geometry: head)
        headNode.position = SCNVector3(x: 0, y: 1, z: 0)
        doll.addChildNode(headNode)
        
        let body = SCNBox(width: 0.8, height: 1.2, length: 0.5, chamferRadius: 0.1)
        body.materials = [mt]
        let bodyNode = SCNNode(geometry: body)
        doll.addChildNode(bodyNode)
        
        let bar = SCNCylinder(radius: 0.05, height: 3)
        bar.materials = [mt]
        let barNode = SCNNode(geometry: bar)
        barNode.position = SCNVector3(x: 0, y: -1.5, z: 0)
        doll.addChildNode(barNode)
        
        let weight = SCNBox(width: 0.6, height: 0.4, length: 0.4, chamferRadius: 0)
        weight.materials = [mt]
        let weightNode = SCNNode(geometry: weight)
        weightNode.position = SCNVector3(x: 0, y: -2.5, z: 0)
        doll.addChildNode(weightNode)
        
        
        doll.physicsBody = SCNPhysicsBody.dynamicBody()
        let joint = SCNPhysicsHingeJoint(body: doll.physicsBody!, axis: SCNVector3(x: 1, y: 0, z: 0), anchor: SCNVector3(x: 0, y: 0.3, z: -0.4))
        sceneView?.scene?.physicsWorld.addBehavior(joint)
        
        sceneView?.scene?.rootNode.addChildNode(doll)
    }
    
    override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
        let doll = sceneView?.scene?.rootNode.childNodeWithName("doll", recursively: false)
        doll?.physicsBody?.applyTorque(SCNVector4(x: 1, y: 0, z: 0, w: 2), impulse: true)
    }
    
    func createCamera() {
        let camera = SCNNode()
        camera.camera = SCNCamera()
        camera.position = SCNVector3(x: 0, y: 0, z: 14)
        sceneView?.scene?.rootNode.addChildNode(camera)
    }
}

http://lepetit-prince.net/ios/?p=4360