How to chain multiple collada animations using Swift in Xcode? - swift

I am having trouble loading four collada animations in a sequence. Using this code, the animations start at the same time and there is no sequence between each other. I would like to star with SU.dae then FTW.dae and so on, such as large animation using Xcode.
Does anyone know how to properly fix this issues?
import UIKit
import SceneKit
import ARKit
class ViewController: UIViewController, ARSCNViewDelegate {
#IBOutlet var sceneView: ARSCNView!
var animations = [String: CAAnimation]()
var Stand_Up:Bool = true
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()
// Set the scene to the view
sceneView.scene = scene
// Loaf the DAE amimation
loadAnimations (sceneName: "art.scnassets/animation/SU.dae")
loadAnimations (sceneName: "art.scnassets/animation/FTW.dae")
loadAnimations (sceneName: "art.scnassets/animation/R.dae")
loadAnimations (sceneName: "art.scnassets/animation/BAE.dae")
}
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()
}
func loadAnimations (sceneName:String) {
// Load the character in the idle animation
let idleScene = SCNScene(named: sceneName)!
// This node will be parent of all the animation models
let node = SCNNode()
// Add all the child nodes to the parent node
for child in idleScene.rootNode.childNodes {
node.addChildNode(child)
}
// Set up some properties
node.position = SCNVector3(0, -1, -2)
node.scale = SCNVector3(0.2, 0.2, 0.2)
// Add the node to the scene
sceneView.scene.rootNode.addChildNode(node)
animateEntireNodeTreeOnce(mostRootNode: node)
}
func animateEntireNodeTreeOnce(mostRootNode node: SCNNode){
onlyAnimateThisNodeOnce(node)
for childNode in node.childNodes {
animateEntireNodeTreeOnce(mostRootNode: childNode)
}
}
func onlyAnimateThisNodeOnce(_ node: SCNNode) {
if node.animationKeys.count > 0 {
for key in node.animationKeys {
let animation = node.animation(forKey: key)!
animation.repeatCount = 1
animation.duration = 5;
animation.isRemovedOnCompletion = false
node.removeAllAnimations()
node.addAnimation(animation, forKey: key)
}
}
}
func session(_ session: ARSession, didFailWithError error: Error) {
// Present an error message to the user
}
func sessionWasInterrupted(_ session: ARSession) {
// Inform the user that the session has been interrupted, for example, by presenting an overlay
}
func sessionInterruptionEnded(_ session: ARSession) {
// Reset tracking and/or remove existing anchors if consistent tracking is required
}
}

Related

Errors: 'Argument passed to call that takes no arguments' & 'Type of expression is ambiguous without more context'

Trying to render a 2D image to show on plane instead of the white/colored plane I have have currently. The following code renders the plane as colored. Tried the following to
the 2D image appear over the colored plane instead. The image I am using is in Assets folder and is: PNG image - 966 KB. Looked/read/researched Apple Docs, StackOflow searching for how.
import UIKit
import SceneKit
import ARKit
import RealityKit
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
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
// Create a session configuration
let configuration = ARImageTrackingConfiguration()
if let imageToTrack = ARReferenceImage.referenceImages(inGroupNamed: "BdayCardImages", bundle: Bundle.main) {
configuration.trackingImages = imageToTrack
configuration.maximumNumberOfTrackedImages = 1
}
// 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()
}
// MARK: - ARSCNViewDelegatemake
//this method finds and triggers image plane
func renderer(_ renderer: SCNSceneRenderer, nodeFor anchor: SCNNode) -> ARAnchor?
{
let node = SCNNode()
if let imageAnchor = anchor as? ARImageAnchor
{
let plane = SCNPlane(
width: imageAnchor.referenceImage.physicalSize.width,
height: imageAnchor.referenceImage.physicalSize.height
)
plane.firstMaterial?.diffuse.contents =
UIColor(red: 1, green: 1.3, blue: 0.5, alpha: 0.8)
let planeNode = SCNNode(geometry: plane)
if imageAnchor.referenceImage.name == "TamBDYCArd3"
{
if let bdayImage = ARImageAnchor(named: "assets/TamBDYCArd3") //Error here: 'Argument passed to call that takes no arguments'
{
if let imageNode = bdayImage.rootNode.childNode.first //Error here: Type of expression is ambiguous without more context'
{
imageNode.update(with: imageNode)
planeNode.addChildNode(imageNode)
if imageAnchor.referenceImage.name == "TamBDYCArd3" //the png image
{
if let bdayImage = ARImageAnchor(named: "assets/TamBDYCArd3")
{
if let imageNode = bdayImage.rootNode.childNode.first
{
imageNode.update(with: imageNode)
planeNode.addChildNode(imageNode)
planeNode.addChildNode(bdayImage)
}
}
}
}
return node
}
}
Any help is appreciated. I am a newb so thanks for your consideration and time.
I was expecting to render the 2D image over the plane. Thanks

Is it possible to run 2 independent ARSessions simultaneously?

Since ARKit3 it is possible to run a ARSession() that supports the back and front camera simultaneously.
For example this creates an ARConfiguration for the front camera that supports also Worldtracking.
// session for the front camera
let configuration = ARFaceTrackingConfiguration()
configuration.isWorldTrackingEnabled
sceneView.session.run(configuration)
This example creates a configuration for a back camera session with Face Tracking enabled:
// session for the back camera
let configuration = ARWorldTrackingConfiguration()
configuration.userFaceTrackingEnabled = true
sceneView.session.run(configuration)
I would like to create 2 independent ARConfigurations and ARSessions that run simultaneously. Like this:
So far i tried this code:
import UIKit
import SceneKit
import ARKit
class ViewController: UIViewController, ARSCNViewDelegate {
// back camera view
#IBOutlet var backView: ARSCNView!
// front camera view
#IBOutlet weak var frontView: ARSCNView!
override func viewDidLoad() {
super.viewDidLoad()
// Set the view's delegate
sceneView.delegate = self
frontView.delegate = self
// Create a new scene for back camera
let scene = SCNScene(named: "art.scnassets/ship.scn")!
backView.scene = scene
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
// session for the back camera
let configuration = ARWorldTrackingConfiguration()
configuration.userFaceTrackingEnabled = true
backView.session.run(configuration)
// session for the front camera
guard ARFaceTrackingConfiguration.isSupported else { return }
let configurationFront = ARFaceTrackingConfiguration()
configurationFront.isLightEstimationEnabled = true
frontView.session.run(configurationFront, options: [])
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
// Pause the view's session
sceneView.session.pause()
}
func session(_ session: ARSession, didFailWithError error: Error) {
// Present an error message to the user
}
func sessionWasInterrupted(_ session: ARSession) {
// Inform the user that the session has been interrupted, for example, by presenting an overlay
}
func sessionInterruptionEnded(_ session: ARSession) {
// Reset tracking and/or remove existing anchors if consistent tracking is required
}
}
The back camera stops its video feed while the front camera is working properly. Any chances to solve this ?
It would also be a solution to run one ARSession and one low level video capture session on the other camera but i am running into the same problems.

ARKit Stereo – Is it possible to run two ARSCNView at the same time?

I was thinking to do some modification to my existing AR app, and I wanted to split the view and add inside 2 ARSCNView in this way users can use the VR Card Box and have a different experience but Xcode is always returning me:
Session (0x102617d10): did fail with error: Error Domain=com.apple.arkit.error Code=102 "Required sensor failed."
So, I'm supposing that I can't run 2 ARSCNView sessions at the same time, or am I wrong?
The answer is: Yes, it's possible.
Use the following code to accomplish it:
import UIKit
import SceneKit
import ARKit
class ViewController: UIViewController, ARSCNViewDelegate {
#IBOutlet weak var sceneView: ARSCNView!
#IBOutlet weak var sceneView2: ARSCNView!
override func viewDidLoad() {
super.viewDidLoad()
sceneView.delegate = self
sceneView.showsStatistics = true
let scene = SCNScene(named: "art.scnassets/ship.scn")!
sceneView.scene = scene
sceneView.isPlaying = true
// Setup for sceneView2
sceneView2.scene = scene
sceneView2.showsStatistics = sceneView.showsStatistics
// Now sceneView2 starts receiving updates
sceneView2.isPlaying = true
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
let configuration = ARWorldTrackingConfiguration()
sceneView.session.run(configuration)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
sceneView.session.pause()
}
func renderer(_ renderer: SCNSceneRenderer, updateAtTime time: TimeInterval) {
DispatchQueue.main.async {
self.updateFrame()
}
}
func updateFrame() {
// Clone pointOfView for Second View
let pointOfView: SCNNode = (sceneView.pointOfView?.clone())!
// Determine Adjusted Position for Right Eye
let orientation: SCNQuaternion = pointOfView.orientation
let orientationQuaternion: GLKQuaternion = GLKQuaternionMake(orientation.x,
orientation.y,
orientation.z,
orientation.w)
let eyePos: GLKVector3 = GLKVector3Make(1.0, 0.0, 0.0)
let rotatedEyePos: GLKVector3 = GLKQuaternionRotateVector3(orientationQuaternion,
eyePos)
let rotatedEyePosSCNV: SCNVector3 = SCNVector3Make(rotatedEyePos.x,
rotatedEyePos.y,
rotatedEyePos.z)
let mag: Float = 0.064 // Interocular distance (in metres)
pointOfView.position.x += rotatedEyePosSCNV.x * mag
pointOfView.position.y += rotatedEyePosSCNV.y * mag
pointOfView.position.z += rotatedEyePosSCNV.z * mag
// Set PointOfView for SecondView
sceneView2.pointOfView = pointOfView
}
}
For more details look at this project on a GitHub.
No, or at least it’s possible that you will get errors all the time. It seems that when you use both an ARSCN and a ARSKVIEW View at the same time, a sensor error is presented. It may be due to privacy?

Q: How to add multiple objects AR dectection

I added an ar function into my app to dectect our products. One object is working but i want to add multiple arobject files. I scanned some objects and added them into my ar recource group.
I created a product.sks and added a label + background.
My first question: How can i fix the label to one object? I have two arobjects at the moment so i need 2 different labels. How can i differ the correct label to an object?
My second question: At the moment my HU label is fixed and doesnt move when i'm moving my iPhone. I tried to change some positions etc. but its always fixed.
How can i make it move?
Thanks in advance. I hope my concern is detailed enough
import UIKit
import SceneKit
import ARKit
class ARViewController: UIViewController, ARSCNViewDelegate {
#IBOutlet var sceneView: ARSCNView!
override func viewDidLoad() {
super.viewDidLoad()
sceneView.delegate = self
sceneView.showsStatistics = true
let scene = SCNScene(named: "art.scnassets/scene.scn")!
sceneView.scene = scene
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
let configuration = ARWorldTrackingConfiguration()
configuration.detectionObjects = ARReferenceObject.referenceObjects(inGroupNamed: "Module", bundle: Bundle.main)!
sceneView.session.run(configuration)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
sceneView.session.pause()
}
func renderer(_ renderer: SCNSceneRenderer, nodeFor anchor: ARAnchor) -> SCNNode? {
let node = SCNNode()
return node
}
func renderer(_ renderer: SCNSceneRenderer, nodeFor anchor: ARAnchor) -> SCNNode? {
let node = SCNNode()
if let objectAnchor = anchor as? ARObjectAnchor {
let plane = SCNPlane(width: CGFloat(objectAnchor.referenceObject.extent.x * 0.8), height: CGFloat(objectAnchor.referenceObject.extent.y * 0.5))
plane.cornerRadius = plane.width * 0.125
let displayScene = SKScene(fileNamed: "product")
plane.firstMaterial?.diffuse.contents = displayScene
plane.firstMaterial?.isDoubleSided = true
plane.firstMaterial?.diffuse.contentsTransform = SCNMatrix4Translate(SCNMatrix4MakeScale(1, -1, 1), 0, 1, 0)
let planeNode = SCNNode(geometry: plane)
planeNode.position = SCNVector3Make(objectAnchor.referenceObject.center.x, objectAnchor.referenceObject.center.y + 0.12, objectAnchor.referenceObject.center.z)
node.addChildNode(planeNode)
}
return node
}
func session(_ session: ARSession, didFailWithError error: Error) {
// Present an error message to the user
}
func sessionWasInterrupted(_ session: ARSession) {
// Inform the user that the session has been interrupted, for example, by presenting an overlay
}
func sessionInterruptionEnded(_ session: ARSession) {
// Reset tracking and/or remove existing anchors if consistent tracking is required
}
}
Use anchor.referenceObject.name?
Move how? If you want it to always face the phone, apply billboard constraint.

Resetting ARKit coordinates

I have a simple question. If I wanted to start a game and place the board right in front of me:
gameBoard!.position = SCNVector3(0, 0, -0.6)
This works until I leave the game and come back again. Can I show the game board in exact same position in front of camera or 0.6m in front of me? I might have physically moved to another position.
If you want to reset you ARSession, you have to pause, remove all nodes and rerun your session by resetting tracking and removing anchors.
I made a reset button that does it whenever i want to reset:
#IBAction func reset(_ sender: Any) {
sceneView.session.pause()
sceneView.scene.rootNode.enumerateChildNodes { (node, stop) in
node.removeFromParentNode()
}
sceneView.session.run(configuration, options: [.resetTracking, .removeExistingAnchors])
}
Or put it in your session was interrupted function!
This should be possible using the option resetTracking when you call run on your ARSession again.
Example:
if let configuration = sceneView.session.configuration {
sceneView.session.run(configuration,
options: .resetTracking)
}
To reset ARSession in ARKit framework is quite easy:
class ViewController: UIViewController, ARSCNViewDelegate, ARSessionDelegate {
#IBOutlet var arView: ARSCNView!
#IBOutlet weak var sessionInfoLabel: UILabel!
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let configuration = ARWorldTrackingConfiguration()
configuration.planeDetection = [.horizontal, .vertical]
arView.session.run(configuration)
arView.session.delegate = self
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
arView.session.pause()
}
func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {
guard let planeAnchor = anchor as? ARPlaneAnchor else {
return
}
let plane = Plane(anchor: planeAnchor, in: arView)
node.addChildNode(plane)
}
func sessionInterruptionEnded(_ session: ARSession) {
resetSessionTracking()
sessionInfoLabel.text = "ARSession's interruption has ended"
}
private func resetSessionTracking() {
let config = ARWorldTrackingConfiguration()
config.planeDetection = [.vertical, .horizontal]
arView.scene.rootNode.enumerateChildNodes { (childNode, _) in
childNode.removeFromParentNode()
}
arView.session.run(config, options: [.removeExistingAnchors,
.resetTracking, ])
}
}
Hope this helps.
"This works until I leave the game and come back again."
You can't track camera position in the background. Whenever your app goes to the background and camera turns off, you're losing your position, and sessionWasInterrupted(_:) will be called.
A session is interrupted when it fails to receive camera or motion
sensing data. Session interruptions occur whenever camera capture is
not available—for example, when your app is in the background or there
are multiple foreground apps—or when the device is too busy to process
motion sensor data.