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v2.6.5: Add arrowhead to aircraft heading line on radar

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drawAircraftMarker() previously drew a plain symmetric line for an
aircraft's heading, making it impossible to tell at a glance which
end pointed "forward". The line now ends in a small two-stroke
arrowhead (chevron), so the direction of travel is unambiguous.

Also documents that the index.html version-badge check (release
workflow step 4) is mandatory and not optional, since it was
accidentally skipped on a recent patch release.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Eiswolf-BG
2026-08-06 16:39:02 +02:00
parent 58bdedae31
commit 406326f3da
3 changed files with 41 additions and 5 deletions
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23
src/radar_screen.cpp
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@@ -90,13 +90,34 @@ namespace {
return TFT_RED;
}
// kurzer Kursstrich in Flugrichtung (headingDeg) MIT Pfeilspitze am Ende -
// eine reine Linie ohne Spitze war nicht eindeutig lesbar (nicht erkennbar,
// welches Ende "vorne" ist). Die Spitze besteht aus zwei kurzen Strichen,
// die knapp vor der Linienspitze schraeg nach aussen abzweigen (klassisches
// Chevron-/Pfeilkopf-Symbol, wie bei ATC-Radardarstellungen ueblich).
void drawAircraftMarker(TFT_eSPI& gfx, int16_t x, int16_t y, float headingDeg, uint16_t color) {
gfx.fillCircle(x, y, 5, color);
double rad = headingDeg * PI / 180.0;
int16_t dx = (int16_t)(sin(rad) * 10);
int16_t dy = (int16_t)(-cos(rad) * 10);
gfx.drawLine(x, y, x + dx, y + dy, color);
int16_t tipX = x + dx;
int16_t tipY = y + dy;
gfx.drawLine(x, y, tipX, tipY, color);
// Pfeilspitze: zwei kurze Striche von der Spitze aus, je 150 Grad
// zur Kurslinie zurueckgeklappt (also leicht "nach hinten" zeigend,
// wie bei einem Pfeilkopf "^" ueblich).
constexpr double WING_ANGLE_RAD = 150.0 * PI / 180.0;
constexpr int16_t WING_LEN = 4;
double wing1 = rad + WING_ANGLE_RAD;
double wing2 = rad - WING_ANGLE_RAD;
int16_t w1x = tipX + (int16_t)(sin(wing1) * WING_LEN);
int16_t w1y = tipY + (int16_t)(-cos(wing1) * WING_LEN);
int16_t w2x = tipX + (int16_t)(sin(wing2) * WING_LEN);
int16_t w2y = tipY + (int16_t)(-cos(wing2) * WING_LEN);
gfx.drawLine(tipX, tipY, w1x, w1y, color);
gfx.drawLine(tipX, tipY, w2x, w2y, color);
}
uint16_t dimColorForAltitude(int32_t altFt) {