Example #1
0
static void ChangeWaypoint(EControl detection_result)
{

  int obs = _obstacle_waypoint;

  if (obs != -1){
    std::cout << "====got obstacle waypoint====" << std::endl;
    std::cout << "=============================" << std::endl;
  }

  if (detection_result == STOP){ // STOP for obstacle
    // stop_waypoint is about _others_distance meter away from obstacles
    int stop_waypoint = obs - ((int)(_others_distance / _path_change.getInterval()));
    std::cout << "stop_waypoint: " << stop_waypoint << std::endl;
    // change waypoints to stop by the stop_waypoint
    _path_change.changeWaypoints(stop_waypoint);
    _path_change.avoidSuddenBraking();
    _path_change.setTemporalWaypoints();
    _temporal_waypoints_pub.publish(_path_change.getTemporalWaypoints());
  } else if (detection_result == DECELERATE) { // DECELERATE for obstacles
    _path_change.setPath(_path_dk.getCurrentWaypoints());
    _path_change.setDeceleration();
    _path_change.setTemporalWaypoints();
    _temporal_waypoints_pub.publish(_path_change.getTemporalWaypoints());
  } else {               // ACELERATE or KEEP
    _path_change.setPath(_path_dk.getCurrentWaypoints());
    _path_change.avoidSuddenAceleration();
    _path_change.avoidSuddenBraking();
    _path_change.setTemporalWaypoints();
    _temporal_waypoints_pub.publish(_path_change.getTemporalWaypoints());
  }


    return;
}
Example #2
0
void PathVset::changeWaypoints(int stop_waypoint)
{
  int i = 0;
  int close_waypoint_threshold = 4;
  int fill_in_zero = 20;
  double changed_vel;
  double interval = getInterval();

  // change waypoints to decelerate
  for (int num = stop_waypoint; num > _closest_waypoint - close_waypoint_threshold; num--){
    if (!checkWaypoint(num, "changeWaypoints"))
      continue;

    changed_vel = sqrt(2.0*_decel*(interval*i)); // sqrt(2*a*x)

    //std::cout << "changed_vel[" << num << "]: " << mps2kmph(changed_vel) << " (km/h)";
    //std::cout << "   distance: " << (_obstacle_waypoint-num)*interval << " (m)";
    //std::cout << "   current_vel: " << mps2kmph(_current_vel) << std::endl;

    waypoint_follower::waypoint initial_waypoint = _path_dk.getCurrentWaypoints().waypoints[num];
    if (changed_vel > _velocity_limit || //
	changed_vel > initial_waypoint.twist.twist.linear.x){ // avoid acceleration
      //std::cout << "too large velocity!!" << std::endl;
      current_waypoints_.waypoints[num].twist.twist.linear.x = initial_waypoint.twist.twist.linear.x;
    } else {
      current_waypoints_.waypoints[num].twist.twist.linear.x = changed_vel;
    }

    i++;
  }

  // fill in 0
  for (int j = 1; j < fill_in_zero; j++){
    if (!checkWaypoint(stop_waypoint+j, "changeWaypoints"))
      continue;
    current_waypoints_.waypoints[stop_waypoint+j].twist.twist.linear.x = 0.0;
  }


  std::cout << "---changed waypoints---" << std::endl;

  return;
}