Fix minor error with placement of route steps

Sources/ARKit-CoreLocation/Nodes/PolylineNode.swift

@@ -73,6 +73,7 @@ private extension PolylineNode {
         for i in 0 ..< polyline.pointCount - 1 {
             let currentLocation = CLLocation(coordinate: points[i].coordinate, altitude: altitude)
             let nextLocation = CLLocation(coordinate: points[i + 1].coordinate, altitude: altitude)
+            let midLoction = midPoint(currentLocation, nextLocation)
 
             let distance = currentLocation.distance(from: nextLocation)
 
@@ -82,17 +83,24 @@ private extension PolylineNode {
 
             let bearing = -currentLocation.bearing(between: nextLocation)
 
-            // This pivot translation in the +Z direction will cause the box to be
-            // rendered a bit away from its true location. The actual factor should
-            // probably be a parameter or property of some sort.
-            boxNode.pivot = SCNMatrix4MakeTranslation(0, 0, 0.5 * Float(distance))
+            // Orient the line to point from currentLoction to nextLocation
             boxNode.eulerAngles.y = Float(bearing).degreesToRadians
 
-            let locationNode = LocationNode(location: currentLocation, tag: tag)
+            let locationNode = LocationNode(location: midLoction, tag: tag)
             locationNode.addChildNode(boxNode)
 
             locationNodes.append(locationNode)
         }
     }
 
+    func midPoint (_ first: CLLocation, _ second: CLLocation) -> CLLocation {
+        return CLLocation(
+            coordinate: CLLocationCoordinate2D(
+                latitude: (first.coordinate.latitude + second.coordinate.latitude) / 2,
+                longitude: (first.coordinate.longitude + second.coordinate.longitude) / 2
+            ),
+            altitude: (first.altitude + second.altitude) / 2
+        )
+    } // midPoint(_:_:)
+
 }

changelog.md

@@ -1,5 +1,6 @@
 # Changelog
 - 1.2.2
+   - [PR #255 - Fix minor error with placement of route steps](https://github.com/ProjectDent/ARKit-CoreLocation/pull/255)
    - [PR #249 - Fix Memory Leak](https://github.com/ProjectDent/ARKit-CoreLocation/pull/249)
    - [PR #244 - Improve geodesy calculations and test coverage](https://github.com/ProjectDent/ARKit-CoreLocation/pull/244)
    - [PR #240 - Fix build error, update compiler checks](https://github.com/ProjectDent/ARKit-CoreLocation/pull/240)