This is an iOS application for visualizing 3D CAD models, created using SceneKit, Model I/O and ARKit.
- Fetch the models using a valid web link or use the default wigwam model. If the link is invalid, the application will fall back to using the default wigwam model.
- Pick a model from the 3D/2D list. For 2D, the app presents a grid-like layout displaying all the images of projects fetched from the applications API from CSDT. The user can view the image in detail and display the image using AR.
- Zoom, move and rotate model with gestures
- Manipulate the color of the model with segmented control
- Adjust light intensity with slider
- Change the position of the light with a tap on the scene
- Settings Page
- Change the scale factor used for the AR model
- For large models like wigwam, a very small factor such 0.002 is needed to display AR content correctly
- Pick from light types: omnidirectional, directional, probe, spot or ambient
- Pick from blend modes: add, alpha, multiply, subtract, screen or replace
- Animations! Choose from no animation or infinite rotation
- Change the scale factor used for the AR model
Relevant code needed to set up SceneKit - obtained from WWDC Presentation
import UIKit
import SceneKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// create a new scene
let scene = SCNScene(named: "art.scnassets/wigwaam.stl")!
// create and add a light to the scene
let lightNode = SCNNode()
lightNode.light = SCNLight()
lightNode.light!.type = .omni
lightNode.position = SCNVector3(x: 0, y: 10, z: 10)
scene.rootNode.addChildNode(lightNode)
// create and add a camera to the scene
let cameraNode = SCNNode()
cameraNode.camera = SCNCamera()
scene.rootNode.addChildNode(cameraNode)
cameraNode.position = SCNVector3(x: 0, y: 0, z: 15)
//additional setups
let scnView = self.view as! SCNView
scnView.scene = scene
scnView.allowsCameraControl = true
scnView.showsStatistics = true
scnView.backgroundColor = UIColor.white
}
}- Wait until the device has found a surface to place the model.
- This app will highlight the the plane detected by ARKit.
- Once the plane is shown, tapping the plane will place the AR model on the plane
- Zoom the AR model with pinch gesture
- Rotate the AR model with rotation gesture
- Choose from 3 rotation axes: X, Y and Z
- Once the model is loaded, pan gesture can be used to adjust the position of the light projected onto the model.
- The AR model inherits all the settings from the previous SceneKit view.
- The image selected from the 2D list can be projected to the AR surface. (Only on a horizontal surface)
- In the future, once the newest ARKit features are out of beta stage, the image can be projected to a vertical surface like a wall.
Relevant code needed to setup AR - from a WWDC 2017 video
import UIKit
import SceneKit
import ARKit
class ViewController: UIViewController, ARSCNViewDelegate {
@IBOutlet var sceneView: ARSCNView!
override func viewDidLoad() {
super.viewDidLoad()
// Set the view's delegate
sceneView.delegate = self
// Show statistics such as fps and timing information
sceneView.showsStatistics = true
// Create a new scene
let scene = SCNScene(named: "art.scnassets/wigwam.stl")!
// Set the scene to the view
sceneView.scene = scene
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
// Create a session configuration
let configuration = ARWorldTrackingConfiguration()
// Run the view's session
sceneView.session.run(configuration)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
// Pause the view's session
sceneView.session.pause()
}
}- Alamofire ( Swift Networking Library )