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author | Thomas Gubler <thomasgubler@gmail.com> | 2012-11-11 17:35:55 +0100 |
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committer | Thomas Gubler <thomasgubler@gmail.com> | 2012-11-11 17:35:55 +0100 |
commit | 60198e3a2da7c5507abcab7a3d032858691d024a (patch) | |
tree | 1c6c832f7b15971616ce11da4e77dcd2b0ba1a56 | |
parent | 8edf02681bc4cce3a5ee315841d14594166b6b31 (diff) | |
download | px4-firmware-60198e3a2da7c5507abcab7a3d032858691d024a.tar.gz px4-firmware-60198e3a2da7c5507abcab7a3d032858691d024a.tar.bz2 px4-firmware-60198e3a2da7c5507abcab7a3d032858691d024a.zip |
small code cleanup
-rw-r--r-- | apps/fixedwing_pos_control/fixedwing_pos_control_main.c | 8 | ||||
-rw-r--r-- | apps/systemlib/geo/geo.c | 76 | ||||
-rw-r--r-- | apps/systemlib/geo/geo.h | 9 |
3 files changed, 48 insertions, 45 deletions
diff --git a/apps/fixedwing_pos_control/fixedwing_pos_control_main.c b/apps/fixedwing_pos_control/fixedwing_pos_control_main.c index 38f5db9e4..443048913 100644 --- a/apps/fixedwing_pos_control/fixedwing_pos_control_main.c +++ b/apps/fixedwing_pos_control/fixedwing_pos_control_main.c @@ -169,7 +169,7 @@ int fixedwing_pos_control_thread_main(int argc, char *argv[]) memset(&global_setpoint, 0, sizeof(global_setpoint)); struct vehicle_attitude_s att; memset(&att, 0, sizeof(att)); - crosstrack_error_s xtrack_err; + struct crosstrack_error_s xtrack_err; memset(&xtrack_err, 0, sizeof(xtrack_err)); /* output structs */ @@ -257,11 +257,11 @@ int fixedwing_pos_control_thread_main(int argc, char *argv[]) /* calculate crosstrack error */ // Only the case of a straight line track following handled so far - xtrack_err = get_distance_to_line((double)global_pos.lat / (double)1e7d, (double)global_pos.lon / (double)1e7d, + int distance_res = get_distance_to_line(&xtrack_err, (double)global_pos.lat / (double)1e7d, (double)global_pos.lon / (double)1e7d, (double)start_pos.lat / (double)1e7d, (double)start_pos.lon / (double)1e7d, (double)global_setpoint.lat / (double)1e7d, (double)global_setpoint.lon / (double)1e7d); - if(!(xtrack_err.error || xtrack_err.past_end)) { + if(!(distance_res != OK || xtrack_err.past_end)) { float delta_psi_c = -p.xtrack_p * xtrack_err.distance; //(-) because z axis points downwards @@ -286,7 +286,7 @@ int fixedwing_pos_control_thread_main(int argc, char *argv[]) } else { if (counter % 100 == 0) - printf("error: %d, past_end %d\n", xtrack_err.error, xtrack_err.past_end); + printf("distance_res: %d, past_end %d\n", distance_res, xtrack_err.past_end); } } diff --git a/apps/systemlib/geo/geo.c b/apps/systemlib/geo/geo.c index abe44c69e..2f4b37e79 100644 --- a/apps/systemlib/geo/geo.c +++ b/apps/systemlib/geo/geo.c @@ -45,7 +45,12 @@ */ #include <systemlib/geo/geo.h> +#include <nuttx/config.h> +#include <unistd.h> +#include <pthread.h> +#include <stdio.h> #include <math.h> +#include <stdbool.h> /* values for map projection */ @@ -230,25 +235,24 @@ __EXPORT float get_bearing_to_next_waypoint(double lat_now, double lon_now, doub // Additional functions - @author Doug Weibel <douglas.weibel@colorado.edu> -__EXPORT crosstrack_error_s get_distance_to_line(double lat_now, double lon_now, double lat_start, double lon_start, double lat_end, double lon_end) +__EXPORT int get_distance_to_line(struct crosstrack_error_s * crosstrack_error, double lat_now, double lon_now, double lat_start, double lon_start, double lat_end, double lon_end) { // This function returns the distance to the nearest point on the track line. Distance is positive if current // position is right of the track and negative if left of the track as seen from a point on the track line // headed towards the end point. - crosstrack_error_s return_var; float dist_to_end; float bearing_end; float bearing_track; float bearing_diff; - return_var.error = true; // Set error flag, cleared when valid result calculated. - return_var.past_end = false; - return_var.distance = 0.0f; - return_var.bearing = 0.0f; + int return_value = ERROR; // Set error flag, cleared when valid result calculated. + crosstrack_error->past_end = false; + crosstrack_error->distance = 0.0f; + crosstrack_error->bearing = 0.0f; // Return error if arguments are bad - if (lat_now == 0.0d || lon_now == 0.0d || lat_start == 0.0d || lon_start == 0.0d || lat_end == 0.0d || lon_end == 0.0d) return return_var; + if (lat_now == 0.0d || lon_now == 0.0d || lat_start == 0.0d || lon_start == 0.0d || lat_end == 0.0d || lon_end == 0.0d) return return_value; bearing_end = get_bearing_to_next_waypoint(lat_now, lon_now, lat_end, lon_end); bearing_track = get_bearing_to_next_waypoint(lat_start, lon_start, lat_end, lon_end); @@ -257,35 +261,34 @@ __EXPORT crosstrack_error_s get_distance_to_line(double lat_now, double lon_now, // Return past_end = true if past end point of line if (bearing_diff > M_PI_2_F || bearing_diff < -M_PI_2_F) { - return_var.past_end = true; - return_var.error = false; - return return_var; + crosstrack_error->past_end = true; + return_value = OK; + return return_value; } dist_to_end = get_distance_to_next_waypoint(lat_now, lon_now, lat_end, lon_end); - return_var.distance = (dist_to_end) * sin(bearing_diff); + crosstrack_error->distance = (dist_to_end) * sin(bearing_diff); if (sin(bearing_diff) >= 0) { - return_var.bearing = _wrapPI(bearing_track - M_PI_2_F); + crosstrack_error->bearing = _wrapPI(bearing_track - M_PI_2_F); } else { - return_var.bearing = _wrapPI(bearing_track + M_PI_2_F); + crosstrack_error->bearing = _wrapPI(bearing_track + M_PI_2_F); } - return_var.error = false; + return_value = OK; - return return_var; + return return_value; } -__EXPORT crosstrack_error_s get_distance_to_arc(double lat_now, double lon_now, double lat_center, double lon_center, +__EXPORT int get_distance_to_arc(struct crosstrack_error_s * crosstrack_error, double lat_now, double lon_now, double lat_center, double lon_center, float radius, float arc_start_bearing, float arc_sweep) { // This function returns the distance to the nearest point on the track arc. Distance is positive if current // position is right of the arc and negative if left of the arc as seen from the closest point on the arc and // headed towards the end point. - crosstrack_error_s return_var; // Determine if the current position is inside or outside the sector between the line from the center // to the arc start and the line from the center to the arc end @@ -294,13 +297,13 @@ __EXPORT crosstrack_error_s get_distance_to_arc(double lat_now, double lon_now, float bearing_now = get_bearing_to_next_waypoint(lat_now, lon_now, lat_center, lon_center); bool in_sector; - return_var.error = true; // Set error flag, cleared when valid result calculated. - return_var.past_end = false; - return_var.distance = 0.0f; - return_var.bearing = 0.0f; + int return_value = ERROR; // Set error flag, cleared when valid result calculated. + crosstrack_error->past_end = false; + crosstrack_error->distance = 0.0f; + crosstrack_error->bearing = 0.0f; // Return error if arguments are bad - if (lat_now == 0.0d || lon_now == 0.0d || lat_center == 0.0d || lon_center == 0.0d || radius == 0.0d) return return_var; + if (lat_now == 0.0d || lon_now == 0.0d || lat_center == 0.0d || lon_center == 0.0d || radius == 0.0d) return return_value; if (arc_sweep >= 0) { @@ -313,7 +316,7 @@ __EXPORT crosstrack_error_s get_distance_to_arc(double lat_now, double lon_now, bearing_sector_end = arc_start_bearing; bearing_sector_start = arc_start_bearing - arc_sweep; - if (bearing_sector_start < 0.0) bearing_sector_start += M_TWOPI_F; + if (bearing_sector_start < 0.0f) bearing_sector_start += M_TWOPI_F; } in_sector = false; @@ -326,16 +329,16 @@ __EXPORT crosstrack_error_s get_distance_to_arc(double lat_now, double lon_now, // If in the sector then calculate distance and bearing to closest point if (in_sector) { - return_var.past_end = false; + crosstrack_error->past_end = false; float dist_to_center = get_distance_to_next_waypoint(lat_now, lon_now, lat_center, lon_center); if (dist_to_center <= radius) { - return_var.distance = radius - dist_to_center; - return_var.bearing = bearing_now + M_PI_F; + crosstrack_error->distance = radius - dist_to_center; + crosstrack_error->bearing = bearing_now + M_PI_F; } else { - return_var.distance = dist_to_center - radius; - return_var.bearing = bearing_now; + crosstrack_error->distance = dist_to_center - radius; + crosstrack_error->bearing = bearing_now; } // If out of the sector then calculate dist and bearing to start or end point @@ -359,21 +362,22 @@ __EXPORT crosstrack_error_s get_distance_to_arc(double lat_now, double lon_now, float dist_to_start = get_distance_to_next_waypoint(lat_now, lon_now, lat_start, lon_start); float dist_to_end = get_distance_to_next_waypoint(lat_now, lon_now, lat_end, lon_end); + if (dist_to_start < dist_to_end) { - return_var.distance = dist_to_start; - return_var.bearing = get_bearing_to_next_waypoint(lat_now, lon_now, lat_start, lon_start); + crosstrack_error->distance = dist_to_start; + crosstrack_error->bearing = get_bearing_to_next_waypoint(lat_now, lon_now, lat_start, lon_start); } else { - return_var.past_end = true; - return_var.distance = dist_to_end; - return_var.bearing = get_bearing_to_next_waypoint(lat_now, lon_now, lat_end, lon_end); + crosstrack_error->past_end = true; + crosstrack_error->distance = dist_to_end; + crosstrack_error->bearing = get_bearing_to_next_waypoint(lat_now, lon_now, lat_end, lon_end); } } - return_var.bearing = _wrapPI(return_var.bearing); - return_var.error = false; - return return_var; + crosstrack_error->bearing = _wrapPI(crosstrack_error->bearing); + return_value = OK; + return return_value; } float _wrapPI(float bearing) diff --git a/apps/systemlib/geo/geo.h b/apps/systemlib/geo/geo.h index 807e508a2..7aad79a8c 100644 --- a/apps/systemlib/geo/geo.h +++ b/apps/systemlib/geo/geo.h @@ -48,12 +48,11 @@ #include <stdbool.h> -typedef struct { - bool error; // Flag that the calculation failed +struct crosstrack_error_s { bool past_end; // Flag indicating we are past the end of the line/arc segment float distance; // Distance in meters to closest point on line/arc float bearing; // Bearing in radians to closest point on line/arc -} crosstrack_error_s; +} ; __EXPORT static void map_projection_init(double lat_0, double lon_0); @@ -67,9 +66,9 @@ __EXPORT float get_bearing_to_next_waypoint(double lat_now, double lon_now, doub // -__EXPORT crosstrack_error_s get_distance_to_line(double lat_now, double lon_now, double lat_start, double lon_start, double lat_end, double lon_end); +__EXPORT int get_distance_to_line(struct crosstrack_error_s * crosstrack_error, double lat_now, double lon_now, double lat_start, double lon_start, double lat_end, double lon_end); -__EXPORT crosstrack_error_s get_distance_to_arc(double lat_now, double lon_now, double lat_center, double lon_center, +__EXPORT int get_distance_to_arc(struct crosstrack_error_s * crosstrack_error, double lat_now, double lon_now, double lat_center, double lon_center, float radius, float arc_start_bearing, float arc_sweep); float _wrap180(float bearing); |