Initial commit for first version of project

GasTankAR/Views/TankAR/SessionConfigurationFactory.swift

@@ -0,0 +1,47 @@
+//
+//  SessionConfigurationFactory.swift
+//  GasTankAR
+//
+//  Created by Dennis Nemec on 26.08.26.
+//
+
+import ARKit
+
+/// Baut die `ARWorldTrackingConfiguration` für den AR-Modus.
+/// Kapselt die LiDAR-/People-Occlusion-/Image-Detection-Logik an einem Ort.
+struct SessionConfigurationFactory {
+    let useLiDAR: Bool
+    let referenceImages: Set<ARReferenceImage>
+
+    func make(withImages: Bool, initialWorldMap: ARWorldMap?) -> ARWorldTrackingConfiguration {
+        let config = ARWorldTrackingConfiguration()
+        config.planeDetection = [.horizontal]
+
+        if useLiDAR {
+            if ARWorldTrackingConfiguration.supportsSceneReconstruction(.mesh) {
+                config.sceneReconstruction = .mesh
+            }
+            if ARWorldTrackingConfiguration.supportsFrameSemantics(.sceneDepth) {
+                config.frameSemantics.insert(.sceneDepth)
+            }
+        } else {
+            config.sceneReconstruction = []
+            config.frameSemantics = []
+        }
+
+        // People Occlusion funktioniert auch ohne LiDAR (A12+): Personen zwischen Kamera
+        // und Tank verdecken das Objekt korrekt. (Beliebige Objekte wie Stühle brauchen LiDAR.)
+        if ARWorldTrackingConfiguration.supportsFrameSemantics(.personSegmentationWithDepth) {
+            config.frameSemantics.insert(.personSegmentationWithDepth)
+        }
+
+        if let initialWorldMap {
+            config.initialWorldMap = initialWorldMap
+        }
+        if withImages {
+            config.detectionImages = referenceImages
+            config.maximumNumberOfTrackedImages = 1
+        }
+        return config
+    }
+}