pose_follower: pose_follower.h Source File

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00003 * Software License Agreement (BSD License)
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00005 *  Copyright (c) 2009, Willow Garage, Inc.
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00035 * Author: Eitan Marder-Eppstein
00036 *********************************************************************/
00037 #ifndef POSE_FOLLOWER_POSE_FOLLOWER_H_
00038 #define POSE_FOLLOWER_POSE_FOLLOWER_H_
00039 #include <ros/ros.h>
00040 #include <tf/tf.h>
00041 #include <tf/transform_datatypes.h>
00042 #include <tf/transform_listener.h>
00043 #include <nav_core/base_local_planner.h>
00044 #include <costmap_2d/costmap_2d_ros.h>
00045 #include <geometry_msgs/PoseStamped.h>
00046 #include <geometry_msgs/Twist.h>
00047 #include <nav_msgs/Odometry.h>
00048 #include <base_local_planner/trajectory_planner_ros.h>
00049 
00050 namespace pose_follower {
00051   class PoseFollower : public nav_core::BaseLocalPlanner {
00052     public:
00053       PoseFollower();
00054       void initialize(std::string name, tf::TransformListener* tf, costmap_2d::Costmap2DROS* costmap_ros);
00055       bool isGoalReached();
00056       bool setPlan(const std::vector<geometry_msgs::PoseStamped>& global_plan);
00057       bool computeVelocityCommands(geometry_msgs::Twist& cmd_vel);
00058 
00059     private:
00060       inline double sign(double n){
00061         return n < 0.0 ? -1.0 : 1.0;
00062       }
00063 
00064       geometry_msgs::Twist diff2D(const tf::Pose& pose1, const tf::Pose&  pose2);
00065       geometry_msgs::Twist limitTwist(const geometry_msgs::Twist& twist);
00066       double headingDiff(double pt_x, double pt_y, double x, double y, double heading);
00067 
00068       bool transformGlobalPlan(const tf::TransformListener& tf, const std::vector<geometry_msgs::PoseStamped>& global_plan, 
00069           const costmap_2d::Costmap2DROS& costmap, const std::string& global_frame,
00070           std::vector<geometry_msgs::PoseStamped>& transformed_plan);
00071 
00072       void odomCallback(const nav_msgs::Odometry::ConstPtr& msg);
00073       bool stopped();
00074 
00075       tf::TransformListener* tf_;
00076       costmap_2d::Costmap2DROS* costmap_ros_;
00077       ros::Publisher vel_pub_;
00078       double K_trans_, K_rot_, tolerance_trans_, tolerance_rot_;
00079       double tolerance_timeout_;
00080       double max_vel_lin_, max_vel_th_;
00081       double min_vel_lin_, min_vel_th_;
00082       double min_in_place_vel_th_, in_place_trans_vel_;
00083       bool holonomic_;
00084       boost::mutex odom_lock_;
00085       ros::Subscriber odom_sub_;
00086       nav_msgs::Odometry base_odom_;
00087       double trans_stopped_velocity_, rot_stopped_velocity_;
00088       ros::Time goal_reached_time_;
00089       unsigned int current_waypoint_; 
00090       std::vector<geometry_msgs::PoseStamped> global_plan_;
00091       base_local_planner::TrajectoryPlannerROS collision_planner_;
00092       int samples_;
00093   };
00094 };
00095 #endif