test_planar_joint_jacobian.cpp

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/* Author: Ivo Vatavuk */
 
#include <moveit/robot_model/robot_model.h>
#include <moveit/robot_state/robot_state.h>
#include <moveit/robot_state/cartesian_interpolator.h>
#include <moveit/utils/robot_model_test_utils.h>
#include <moveit/utils/eigen_test_utils.h>
 
using namespace moveit::core;
 
class SimplePlanarRobot : public testing::Test
{
protected:
  void SetUp() override
  {
    RobotModelBuilder builder("simple", "a");
    builder.addChain("a->b", "planar");
    builder.addGroupChain("a", "b", "group");
    robot_model_ = builder.build();
    robot_state_ = std::make_shared<RobotState>(robot_model_);
  }
 
  void TearDown() override
  {
  }
 
protected:
  RobotModelPtr robot_model_;
  RobotStatePtr robot_state_;
};
 
TEST_F(SimplePlanarRobot, testSimplePlanarRobot)
{
  std::cout << "Testing simple planar robot jacobian\n";
 
  Eigen::Vector3d reference_point_position(0.0, 0.0, 0.0);
  auto joint_model_group = robot_model_->getJointModelGroup("group");
 
  std::vector<double> q_test{ 0.0, 0.0, 0.0 };
  //-----------------------Set robot state-----------------------
  robot_state_->setJointGroupPositions(joint_model_group, q_test);
  robot_state_->updateLinkTransforms();
 
  //-----------------------Calculate Jacobian-----------------------
  Eigen::MatrixXd jacobian;
  robot_state_->getJacobian(joint_model_group, robot_state_->getLinkModel("b"), reference_point_position, jacobian);
 
  //-----------------------Move first axis to 10 m-----------------------
  q_test[0] = 10.0;
  //-----------------------Set robot state-----------------------
  robot_state_->setJointGroupPositions(joint_model_group, q_test);
  robot_state_->updateLinkTransforms();
 
  //-----------------------Calculate Jacobian-----------------------
  Eigen::MatrixXd jacobian_2;
  robot_state_->getJacobian(joint_model_group, robot_state_->getLinkModel("b"), reference_point_position, jacobian_2);
 
  std::cout << "First Jacobian = \n" << jacobian << "\n";
  std::cout << "Second Jacobian = \n" << jacobian_2 << "\n";
 
  EXPECT_EIGEN_NEAR(jacobian, jacobian_2, 1e-5);
}
 
int main(int argc, char** argv)
{
  testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}