message: Begin line trace experiment
diff: @@ -66,9 +66,6 @@ class Vehicle {
  // Threaded worker for running flight control
  class FFlightManager * _flightManager = NULL;
  - // The landscape, for determining altitude
  - ALandscape* _landscape = NULL;
  -
  // Bozo filter for failure to select a map
  bool _mapSelected = false;
  @@ -259,7 +256,6 @@ class Vehicle {
  {
  _dynamics = NULL;
  _flightManager = NULL;
  - _landscape = NULL;
  }
  Vehicle(MultirotorDynamics * dynamics)
  @@ -291,18 +287,6 @@ class Vehicle {
  return;
  }
  - // Get all actors tagged as "Landscape" in scene (should be just one!)
  - TArray<AActor*> foundLandscapes;
  - UGameplayStatics::GetAllActorsWithTag(_pawn->GetWorld(), FName("Landscape"), foundLandscapes);
  -
  - // Use the first one found
  - if (foundLandscapes.Num() == 0) {
  - debug("No landscape object found in scene");
  - }
  - else {
  - _landscape = (ALandscape *)foundLandscapes[0];
  - }
  -
  // Reset FPS count
  _startTime = FPlatformTime::Seconds();
  _count = 0;
  @@ -345,7 +329,7 @@ class Vehicle {
  // Grab images
  grabImages();
  - if (_landscape) debug("Distance: %f", _pawn->GetDistanceTo(_landscape));
  + debug("%p", _pawn->GetWorld());
  }
  void PostInitializeComponents()
  