Instant Tracker iOS Tutorial
1. Overview
2. iOS Development
2.1 Create Instants
2.2 Start / Stop Tracker
2.3 Use Tracking Information
2.4 Create Instant Target Data
3. Reference
3.1 API Reference
3.2 Sample
1. Overview
Start developing MAXST ARSDK Instant Tracker on iOS Platform. Refer to Instant Tracker Introduction for detailed information.
Refer to Tracker Coordinate System to better understand 3D coordinate system of Instant Tracker.
Prerequisites |
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Instant Tracker Introduction |
Tracker Coordinate System |
2. iOS Development
Start developing on xCode using Swift. Refer to Requirements & Supports to find out which devices are supported.
ARSDK has to properly integrate on iOS UIViewController. Refer to Life Cycle documents for detail.
2.1 Create Instants
var cameraDevice:MasCameraDevice = MasCameraDevice() var sensorDevice:MasSensorDevice = MasSensorDevice() var trackingManager:MasTrackerManager = MasTrackerManager()
2.2 Start / Stop Tracker
To start / stop the tracker, refer to the following code.
※ To change Tracker, destroyTracker() should be called before
@objc func pauseAR() { ... trackingManager.start(.TRACKER_TYPE_INSTANT) } @objc func resumeAR() { trackingManager.stopTracker() ... }
2.3 Use Tracking Information
To augment an object using tracking results, refer to the following code.
func draw(in view: MTKView) { ... let trackingState:MasTrackingState = trackingManager.updateTrackingState() let result:MasTrackingResult = trackingState.getTrackingResult() let backgroundImage:MasTrackedImage = trackingState.getImage() var backgroundProjectionMatrix:matrix_float4x4 = cameraDevice.getBackgroundPlaneProjectionMatrix() let projectionMatrix:matrix_float4x4 = cameraDevice.getProjectionMatrix() if let cameraQuad = backgroundCameraQuad { cameraQuad.setProjectionMatrix(projectionMatrix: backgroundProjectionMatrix) cameraQuad.draw(commandEncoder: commandEncoder, image: backgroundImage) } let trackingCount:Int32 = result.getCount() for i in stride(from: 0, to: trackingCount, by: 1) { let trackable:MasTrackable = result.getTrackable(i) let poseMatrix:matrix_float4x4 = trackable.getPose() textureCube.setProjectionMatrix(projectionMatrix: projectionMatrix) textureCube.setPoseMatrix(poseMatrix: poseMatrix) textureCube.setTranslation(x: panTranslateX, y: panTranslateY, z: -0.15) textureCube.setScale(x: 0.3 + pinchScale, y: 0.3 + pinchScale, z: 0.3) textureCube.draw(commandEncoder: commandEncoder) } ... }
2.4 Create Instant Target Data
You can create new data only when it is not in tracking state. Refer to the following code.
※ startTracker() should be called before
@IBAction func doTrackingState(_ sender: Any) { let button:UIButton = sender as! UIButton if button.titleLabel?.text == "Start Tracking" { beforeTranslateX = 0.0 beforeTranslateY = 0.0 panTranslateX = 0.0 panTranslateY = 0.0 pinchScale = 0.0 rotateValue = 0.0 trackingManager.findSurface() button.setTitle("Stop Tracking", for: .normal) } else if button.titleLabel?.text == "Stop Tracking" { trackingManager.quitFindingSurface() button.setTitle("Start Tracking", for: .normal) } }
3. References
These are additional references to develop Instant Tracker
3.1 API Reference
Following documents explain classes and functions used to run Instant Tracker.
3.2 Sample
For information regarding sample build and run of Instant Tracker, refer to Sample