pr2_arm_kinematics_plugin.h

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/* Author: Sachin Chitta */

#ifndef PR2_ARM_IK_NODE_H
#define PR2_ARM_IK_NODE_H

#include <kdl/config.h>
#include <kdl/frames.hpp>
#include <kdl/jntarray.hpp>
#include <kdl/tree.hpp>
#include <kdl_parser/kdl_parser.hpp>

#include <moveit/macros/class_forward.h>
#include <moveit_msgs/GetPositionFK.h>
#include <moveit_msgs/GetPositionIK.h>
#include <moveit_msgs/KinematicSolverInfo.h>
#include <moveit_msgs/MoveItErrorCodes.h>

#include <kdl/chainfksolverpos_recursive.hpp>

#include <urdf/model.h>

#include <moveit/kinematics_base/kinematics_base.h>

#include <memory>

#include "pr2_arm_ik.h"

namespace pr2_arm_kinematics
{
static const int NO_IK_SOLUTION = -1;
static const int TIMED_OUT = -2;

MOVEIT_CLASS_FORWARD(PR2ArmIKSolver);

// minimal stuff necessary
class PR2ArmIKSolver : public KDL::ChainIkSolverPos
{
public:
  EIGEN_MAKE_ALIGNED_OPERATOR_NEW

  PR2ArmIKSolver(const urdf::ModelInterface& robot_model, const std::string& root_frame_name,
                 const std::string& tip_frame_name, const double& search_discretization_angle, const int& free_angle);

  ~PR2ArmIKSolver() override{};

// TODO: simplify after kinetic support is dropped
#define KDL_VERSION_LESS(a, b, c) ((KDL_VERSION) < ((a << 16) | (b << 8) | c))
#if KDL_VERSION_LESS(1, 4, 0)
  void updateInternalDataStructures();
#else
  void updateInternalDataStructures() override;
#endif
#undef KDL_VERSION_LESS

  PR2ArmIK pr2_arm_ik_;

  bool active_;

  int CartToJnt(const KDL::JntArray& q_init, const KDL::Frame& p_in, KDL::JntArray& q_out) override;

  int cartToJntSearch(const KDL::JntArray& q_in, const KDL::Frame& p_in, KDL::JntArray& q_out, const double& timeout);

  void getSolverInfo(moveit_msgs::KinematicSolverInfo& response)
  {
    pr2_arm_ik_.getSolverInfo(response);
  }

private:
  bool getCount(int& count, const int& max_count, const int& min_count);

  double search_discretization_angle_;

  int free_angle_;

  std::string root_frame_name_;
};

Eigen::Isometry3f KDLToEigenMatrix(const KDL::Frame& p);
double computeEuclideanDistance(const std::vector<double>& array_1, const KDL::JntArray& array_2);
void getKDLChainInfo(const KDL::Chain& chain, moveit_msgs::KinematicSolverInfo& chain_info);

MOVEIT_CLASS_FORWARD(PR2ArmKinematicsPlugin);

class PR2ArmKinematicsPlugin : public kinematics::KinematicsBase
{
public:
  PR2ArmKinematicsPlugin();

  bool isActive();

  bool
  getPositionIK(const geometry_msgs::Pose& ik_pose, const std::vector<double>& ik_seed_state,
                std::vector<double>& solution, moveit_msgs::MoveItErrorCodes& error_code,
                const kinematics::KinematicsQueryOptions& options = kinematics::KinematicsQueryOptions()) const override;

  bool searchPositionIK(
      const geometry_msgs::Pose& ik_pose, const std::vector<double>& ik_seed_state, double timeout,
      std::vector<double>& solution, moveit_msgs::MoveItErrorCodes& error_code,
      const kinematics::KinematicsQueryOptions& options = kinematics::KinematicsQueryOptions()) const override;
  bool searchPositionIK(
      const geometry_msgs::Pose& ik_pose, const std::vector<double>& ik_seed_state, double timeout,
      const std::vector<double>& consistency_limits, std::vector<double>& solution,
      moveit_msgs::MoveItErrorCodes& error_code,
      const kinematics::KinematicsQueryOptions& options = kinematics::KinematicsQueryOptions()) const override;

  bool searchPositionIK(
      const geometry_msgs::Pose& ik_pose, const std::vector<double>& ik_seed_state, double timeout,
      std::vector<double>& solution, const IKCallbackFn& solution_callback, moveit_msgs::MoveItErrorCodes& error_code,
      const kinematics::KinematicsQueryOptions& options = kinematics::KinematicsQueryOptions()) const override;

  bool searchPositionIK(
      const geometry_msgs::Pose& ik_pose, const std::vector<double>& ik_seed_state, double timeout,
      const std::vector<double>& consistency_limits, std::vector<double>& solution,
      const IKCallbackFn& solution_callback, moveit_msgs::MoveItErrorCodes& error_code,
      const kinematics::KinematicsQueryOptions& options = kinematics::KinematicsQueryOptions()) const override;

  bool getPositionFK(const std::vector<std::string>& link_names, const std::vector<double>& joint_angles,
                     std::vector<geometry_msgs::Pose>& poses) const override;

  bool initialize(const moveit::core::RobotModel& robot_model, const std::string& group_name,
                  const std::string& base_frame, const std::vector<std::string>& tip_frames,
                  double search_discretization) override;

  const std::vector<std::string>& getJointNames() const override;

  const std::vector<std::string>& getLinkNames() const override;

protected:
  bool active_;
  int free_angle_;
  pr2_arm_kinematics::PR2ArmIKSolverPtr pr2_arm_ik_solver_;
  std::string root_name_;
  int dimension_;
  std::shared_ptr<KDL::ChainFkSolverPos_recursive> jnt_to_pose_solver_;
  KDL::Chain kdl_chain_;
  moveit_msgs::KinematicSolverInfo ik_solver_info_, fk_solver_info_;

  mutable IKCallbackFn desiredPoseCallback_;
  mutable IKCallbackFn solutionCallback_;

  void desiredPoseCallback(const KDL::JntArray& jnt_array, const KDL::Frame& ik_pose,
                           moveit_msgs::MoveItErrorCodes& error_code) const;

  void jointSolutionCallback(const KDL::JntArray& jnt_array, const KDL::Frame& ik_pose,
                             moveit_msgs::MoveItErrorCodes& error_code) const;
};
}  // namespace pr2_arm_kinematics

#endif