It's all in the application: Recon Instruments Snow 2 vs Paragliding (Part 5)

With the Christmas break spent optimizing my BLE implementation (to get some degree of reliability in messaging from the Bluetooth enabled vario), I figured I was set to begin field testing with my upcoming trip to Brazil.

Then an email from the trip organizer -> we will be using turn points to keep everyone close to roads, making for easy retrieve. 

Looks like navigation support just got bumped in priority.

The turn points were distributed via the standard .wpt file format. I just needed a way for one to select the points, assign radii, display bearing and distance to the next point, and pop them from the queue as they are reached.

A split implementation seems best -> build the list on the phone and push to the HUD.

The HUD side: 

The red inverted triangle shows the bearing to waypoint that is 4.4 km away. 

The MFD has been updated to include the height above launch to its cycle of information when within 5 km of launch.

A short while later while on bar and gliding away from the turn point (looking back at it), a wind guesstimate shows up. Heuristics need tuning.

Flight time is in the lower left corner.

The phone side:

Turn points from .wpt loaded and parsed.

Launch point selected, now able to add to waypoint list at bottom

'Add' selected, enter the radius in meters.

Launch and landing added - aggregate non-optimized distance displayed. 'Save' is now available. Selecting a waypoint in the bottom list will replace the 'Add' button with a 'Remove'.

The Save has been re-purposed to 'View' for now. Launch visible with the turn point radius in green.

...and the LZ. The black line is the path to be taken. Again non optimized.

Once saved, the waypoints (along with associated turn points and radii) are pushed to the HUD via Wifi P2P. The HUD has a thread watching for the turn point file to be updated and will pick it up when the upload is complete. The HUD will then populate the navigation queue and display the next waypoint on the compass (as above).

Next steps include the ability to slide the vertices of the flight path around within the turn point cylinder radii (hand optimization). Following that would be automated optimization using some form of the Travelling Salesman genetic algorithm.

Continued in Part 6