Conversation
…o predownload it. Native OSD moving-map renderer (GS builds only, _x86/__ROCKCHIP__) drawn into the OSD with Cairo, over the video: follow modes (plane/north/center/fit), rounded window frame, ini-configurable position/size, on-screen status messages, POI direction markers, home/target from state.ini + landmarks DB. All new rendering is guarded, so air-unit builds (goke/hisi/star6*) are unaffected. Ground-station preflight tool (gs/): Python mapserver + WebKit viewer to browse/download tiles into per-basemap MBTiles, set targets, and build a standalone preflight binary (gs/pack). Keyed-provider (Thunderforest) support with the API key kept out of git. native/rockchip now link sqlite3 (CI dep added). Docs under documentation/ and gs/README.md. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Extends the ground-station moving map and its preflight tool. Ground-side
only: the new C sources go in GS_SRCS and are compiled into the native and
rockchip targets, so camera builds are unaffected.
Terrain elevation
- Preflight stores a terrain height grid alongside the tiles in
maps/elevation.db (AWS "terrarium" tiles decoded to int16 metres at z12,
~28 m/sample). On by default, capped at 1000 tiles.
- mapserver.py gains a stdlib-only PNG decoder, so no new dependency.
- osd/util/terrain_elevation.c mirrors the Python lookup in C; terrain_agl.c
calibrates GPS altitude against terrain at the armed transition and feeds
AGL to the map and to the new !AGL! OSD keyword.
- tests/terrain_{elevation,agl}_test.c, run by `make test-terrain` under
ASan/UBSan.
Link horizon
- New /viewshed endpoint and preflight panel: given an antenna height and a
flight altitude, draws where terrain stops blocking line of sight. Models
4/3-earth refraction and reproduces the textbook horizon over flat ground.
It is a terrain-only upper bound; the DEM is bare earth, so trees, masts
and buildings are not in it.
Map packs
- Each download is allocated a name and never overwrites an existing pack;
the panel lists downloaded packs and can delete them.
- The OSD map cycles packs at runtime with 'h', and falls back to the first
pack in the folder when the configured one is missing.
Downloads
- Tile fetches reuse a kept-alive connection per host instead of a fresh TLS
handshake per tile; the handshake was ~125 ms of a ~220 ms tile.
- Progress is reported per phase (tiles -> POIs -> elevation), so the bar no
longer sits at 100% while elevation is still downloading.
OSD map rendering
- JPEG tiles decode via vendored stb_image, so imagery basemaps render.
- Track vector: an arrow along the GPS ground course drawn over the plane
marker, showing the drift angle when the aircraft crabs. Configurable
length and opacity; hidden below a ground-speed threshold, which also
suppresses it when no GPS data is arriving.
- Up to 5 named waypoints instead of a single target.
- Pack filename banner and a key guide shown briefly when the map appears.
- Fix: in center (track-up) mode the plane icon was drawn at a fixed angle,
so it showed the ground track rather than the heading. Icon and vector now
both derive their screen angle from the rotation the tiles were rendered
with, making all four follow modes consistent.
Preflight UI
- Detail zoom selectable z12-z18, per-zoom basemap sources, an Advanced
section for pack naming, terrain height under the pointer, waypoint
editing and cached-coverage shading.
- map.sh/run-map.sh open the system browser by default; --GTK selects the
WebKitGTK window.
Docs
- New documentation/terrain-elevation.md and gs-map-internals.md; gs/README.md
rewritten around capabilities.
- msposd.ini is gitignored, so add a tracked msposd.ini.example documenting
every [poi] and [map] key, including the new ones. Per-FC sections that
msposd writes at runtime are excluded. Fixes the dangling ../msposd.ini
link in map_control_via_RC.md.
Co-Authored-By: Claude Opus 5
# Conflicts: # osd.c
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Native OSD moving-map renderer (GS builds only, _x86/ROCKCHIP) drawn into the OSD with Cairo, over the video: follow modes (plane/north/center/fit), rounded window frame, ini-configurable position/size, on-screen status messages, POI direction markers, home/target from state.ini + landmarks DB. All new rendering is guarded, so air-unit builds (goke/hisi/star6*) are unaffected.
Ground-station preflight tool (gs/): Python mapserver + WebKit viewer to browse/download tiles into per-basemap MBTiles, set targets, and build a standalone preflight binary (gs/pack). Keyed-provider (Thunderforest) support with the API key kept out of git.
native/rockchip now link sqlite3 (CI dep added). Docs under documentation/ and gs/README.md.