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src/Instrumentation/HUD/: added enable-ground-velocity-vector

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Similar to enable-velocity-vector, but indicates velocity relative to ground,
rather than velocity relative to air. E.g. useful for crosswind landings.
This commit is contained in:
Julian Smith 2020-04-29 18:56:37 +01:00
parent 6baa55b36b
commit 99c1612ddc
2 changed files with 31 additions and 3 deletions
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33
src/Instrumentation/HUD/HUD_ladder.cxx
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@ -64,6 +64,7 @@ HUD::Ladder::Ladder(HUD *hud, const SGPropertyNode *n, float x, float y) :
_target_spot(n->getBoolValue("enable-target-spot")),
_target_markers(n->getBoolValue("enable-target-markers")),
_velocity_vector(n->getBoolValue("enable-velocity-vector")),
_ground_velocity_vector(n->getBoolValue("enable-ground-velocity-vector")),
_drift_marker(n->getBoolValue("enable-drift-marker")),
_alpha_bracket(n->getBoolValue("enable-alpha-bracket")),
_energy_marker(n->getBoolValue("enable-energy-marker")),
@ -148,14 +149,40 @@ void HUD::Ladder::draw(void)
float up_vel, ground_vel, actslope = 0.0, psi = 0.0;
float vel_x = 0.0, vel_y = 0.0, drift;
float alpha;
if (_ground_velocity_vector || _velocity_vector) {
Vxx = get__Vx();
Vyy = get__Vy();
Vzz = get__Vz();
}
if (_ground_velocity_vector) {
double gvel_x = atan2(Vyy, Vxx) * SGD_RADIANS_TO_DEGREES * _compression;
double gvel_y = -atan2(Vzz, Vxx) * SGD_RADIANS_TO_DEGREES * _compression;
/* \ /
|
*/
int outer = 8;
int inner = 2;
glBegin(GL_LINE_STRIP);
glVertex2f(gvel_x - outer, gvel_y + outer);
glVertex2f(gvel_x - inner, gvel_y + inner);
glEnd();
glBegin(GL_LINE_STRIP);
glVertex2f(gvel_x + outer, gvel_y + outer);
glVertex2f(gvel_x + inner, gvel_y + inner);
glEnd();
glBegin(GL_LINE_STRIP);
glVertex2f(gvel_x + 0, gvel_y - inner*3/2);
glVertex2f(gvel_x + 0, gvel_y - outer*3/2);
glEnd();
}
if (_velocity_vector) {
drift = get__beta();
alpha = get__alpha();
Vxx = get__Vx();
Vyy = get__Vy();
Vzz = get__Vz();
Axx = get__Ax();
Ayy = get__Ay();
Azz = get__Az();

1
src/Instrumentation/HUD/HUD_private.hxx
View file

@ -337,6 +337,7 @@ private:
bool _target_spot;
bool _target_markers;
bool _velocity_vector;
bool _ground_velocity_vector;
bool _drift_marker;
bool _alpha_bracket;
bool _energy_marker;