path_dist.cpp

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#include <dwb_critics/path_dist.h>
#include <nav_grid/coordinate_conversion.h>
#include <pluginlib/class_list_macros.h>
#include <nav_2d_utils/path_ops.h>
#include <vector>
 
namespace dwb_critics
{
bool PathDistCritic::prepare(const geometry_msgs::Pose2D& pose, const nav_2d_msgs::Twist2D& vel,
                             const geometry_msgs::Pose2D& goal,
                             const nav_2d_msgs::Path2D& global_plan)
{
  reset();
  const nav_core2::Costmap& costmap = *costmap_;
  const nav_grid::NavGridInfo& info = costmap.getInfo();
  bool started_path = false;
 
  nav_2d_msgs::Path2D adjusted_global_plan = nav_2d_utils::adjustPlanResolution(global_plan, info.resolution);
 
  if (adjusted_global_plan.poses.size() != global_plan.poses.size())
  {
    ROS_DEBUG_NAMED("PathDistCritic", "Adjusted global plan resolution, added %zu points",
                    adjusted_global_plan.poses.size() - global_plan.poses.size());
  }
 
  unsigned int i;
  // put global path points into local map until we reach the border of the local map
  for (i = 0; i < adjusted_global_plan.poses.size(); ++i)
  {
    double g_x = adjusted_global_plan.poses[i].x;
    double g_y = adjusted_global_plan.poses[i].y;
    unsigned int map_x, map_y;
    if (worldToGridBounded(info, g_x, g_y, map_x, map_y) && costmap(map_x, map_y) != costmap.NO_INFORMATION)
    {
      cell_values_.setValue(map_x, map_y, 0.0);
      queue_->enqueueCell(map_x, map_y);
      started_path = true;
    }
    else if (started_path)
    {
      break;
    }
  }
  if (!started_path)
  {
    ROS_ERROR_NAMED("PathDistCritic",
                    "None of the %d first of %zu (%zu) points of the global plan were in the local costmap and free",
                    i, adjusted_global_plan.poses.size(), global_plan.poses.size());
    return false;
  }
 
  propogateManhattanDistances();
 
  return true;
}
 
}  // namespace dwb_critics
 
PLUGINLIB_EXPORT_CLASS(dwb_critics::PathDistCritic, dwb_local_planner::TrajectoryCritic)