WIP: PFD instrument

src/marshconnector.h

@@ -39,6 +39,7 @@ public:
 
   // Get current state of the aircraft
   Transform3D get_aircraft();
+  Vector3 get_velocity();
   // Get normalized (-1 to 1) cyclic position, where X is right, Y is pitch up
   Vector2 get_cyclic();
   // Get normalized (0 to 1) collective position, positive to climb
@@ -118,6 +119,7 @@ private:
   // Or not, in practice the simple solution works nicely
   Vector3 last_location;
   Quaternion last_rotation;
+  Vector3 last_velocity;
   Vector4 last_controls;
   Vector4 last_trim;