nav_ellipse.c

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/*
 * Copyright (C) 2016  Hector Garcia de Marina
 *
 * This file is part of paparazzi.
 *
 * paparazzi is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * paparazzi is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with paparazzi; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 */
 
#include "nav_ellipse.h"
 
#include "generated/airframe.h"
#include "modules/guidance/gvf/gvf.h"
 
#ifndef GVF_ELLIPSE_KE
#define GVF_ELLIPSE_KE 1
#endif
 
#ifndef GVF_ELLIPSE_KN
#define GVF_ELLIPSE_KN 1
#endif
 
#ifndef GVF_ELLIPSE_A
#define GVF_ELLIPSE_A 80
#endif
 
#ifndef GVF_ELLIPSE_B
#define GVF_ELLIPSE_B 80
#endif
 
#ifndef GVF_ELLIPSE_ALPHA
#define GVF_ELLIPSE_ALPHA 0
#endif
 
gvf_ell_par gvf_ellipse_par = {GVF_ELLIPSE_KE, GVF_ELLIPSE_KN,
                               GVF_ELLIPSE_A, GVF_ELLIPSE_B, GVF_ELLIPSE_ALPHA
                              };
gvf_ell_par gvf_ellipse_par = {GVF_ELLIPSE_KE, GVF_ELLIPSE_KN, {…};
 
// Param array lenght
static int gvf_p_len_wps = 0;
 
// ELLIPSE 
 
bool nav_gvf_ellipse_XY(float x, float y, float a, float b, float alpha)
{
  float e;
  struct gvf_grad grad_ellipse;
  struct gvf_Hess Hess_ellipse;
 
  gvf_trajectory.type = 1;
  gvf_trajectory.p[0] = x;
  gvf_trajectory.p[1] = y;
  gvf_trajectory.p[2] = a;
  gvf_trajectory.p[3] = b;
  gvf_trajectory.p[4] = alpha;
  gvf_trajectory.p_len= 5 + gvf_p_len_wps;
  gvf_p_len_wps = 0;
 
  // SAFE MODE
  if (a < 1 || b < 1) {
    gvf_trajectory.p[2] = 60;
    gvf_trajectory.p[3] = 60;
  }
 
  if ((int)gvf_trajectory.p[2] == (int)gvf_trajectory.p[3]) {
    gvf_setNavMode(GVF_MODE_CIRCLE);
 
  } else {
    gvf_setNavMode(GVF_MODE_WAYPOINT);
  }
 
  gvf_ellipse_info(&e, &grad_ellipse, &Hess_ellipse);
  gvf_control.ke = gvf_ellipse_par.ke;
  gvf_control_2D(gvf_ellipse_par.ke, gvf_ellipse_par.kn,
                 e, &grad_ellipse, &Hess_ellipse);
 
  gvf_control.error = e;
 
  return true;
}
bool nav_gvf_ellipse_XY(float x, float y, float a, float b, float alpha) {…}
 
 
bool nav_gvf_ellipse_wp(uint8_t wp, float a, float b, float alpha)
{  
  gvf_trajectory.p[5] = wp;
  gvf_p_len_wps = 1;
 
  nav_gvf_ellipse_XY(WaypointX(wp),  WaypointY(wp), a, b, alpha);
  return true;
}
bool nav_gvf_ellipse_wp(uint8_t wp, float a, float b, float alpha) {…}