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SITL: fixed ship offset velocity correction

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This commit is contained in:
Andrew Tridgell 2022-03-08 08:35:39 +11:00
parent 96a55878a7
commit ab54dda3ca
1 changed files with 18 additions and 2 deletions
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20
libraries/SITL/SIM_Ship.cpp
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@ -95,8 +95,24 @@ Vector2f ShipSim::get_ground_speed_adjustment(const Location &loc, float &yaw_ra
yaw_rate = 0; yaw_rate = 0;
return Vector2f(0,0); return Vector2f(0,0);
} }
Vector2f vel(ship.speed, 0);
vel.rotate(radians(ship.heading_deg)); // find center of the circle that the ship is on
Location center = shiploc;
const float path_radius = path_size.get()*0.5;
center.offset_bearing(ship.heading_deg+(ship.yaw_rate>0?90:-90), path_radius);
// scale speed for ratio of distances
const float p = center.get_distance(loc) / path_radius;
const float scaled_speed = ship.speed * p;
// work out how far around the circle ahead or behind we are for
// rotating velocity
const float bearing1 = center.get_bearing(loc);
const float bearing2 = center.get_bearing(shiploc);
const float heading = ship.heading_deg + degrees(bearing1-bearing2);
Vector2f vel(scaled_speed, 0);
vel.rotate(radians(heading));
yaw_rate = ship.yaw_rate; yaw_rate = ship.yaw_rate;
return vel; return vel;
} }