Public Access
twislaandClaude Opus 5.5
d7952612dd
`r` in the GNSS App (or `gnss track start|stop`) records a Track to /gnss/tracks/YYYYMMDD-HHMMSS.gpx: a point every 5 s once moved 5 m (lib/gnss/track, 7 tests: haversine, the rule, GPX text, the file name). It keeps recording with the App closed, shows REC in the Status Bar, and announces start and stop with a Toast. It needs a card and the time; switching GNSS off stops it. Tracks are written like Captures: past 90 % card usage, until full. Storage Clean-up gets a GNSS tracks category. A Track cut short by a reset or power loss has no GPX footer; the GNSS Service closes such files at the next boot. Verified on the device: a recorded Track and one interrupted by a reset both parse as GPX 1.1 on the PC. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT
41 lines
1.4 KiB
C++
41 lines
1.4 KiB
C++
#pragma once
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#include <cstdint>
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#include <string>
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namespace roro::gnss {
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// Great-circle distance in metres (haversine, mean Earth radius).
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double distanceMeters(double lat1, double lon1, double lat2, double lon2);
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// When a Track takes its next point (Q63): the first one always, then at least every 5 s and only
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// after moving at least 5 m, so standing still doesn't fill the card.
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class TrackRule {
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public:
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static constexpr uint32_t kEveryMs = 5000;
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static constexpr double kMinMeters = 5.0;
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// True if this position should be recorded (and is then remembered as the last point).
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bool due(uint32_t nowMs, double lat, double lon);
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void reset() { any_ = false; }
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private:
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bool any_ = false;
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uint32_t lastMs_ = 0;
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double lat_ = 0, lon_ = 0;
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};
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// "/gnss/tracks/YYYYMMDD-HHMMSS.gpx", from the UTC start time (Storage Clean-up reads its date).
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std::string trackPath(int64_t utcSeconds);
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// GPX 1.1, written a line at a time: the header when a Track starts, a point per line, the footer
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// when it stops. A file whose footer never came (power lost) is closed at the next boot.
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namespace gpx {
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std::string header(const std::string& name);
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std::string point(double lat, double lon, bool hasElevation, float elevationM, int64_t utcSeconds);
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std::string footer();
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bool finished(const std::string& tail); // the end of a file: does it close the GPX?
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} // namespace gpx
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} // namespace roro::gnss
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