contact-point.hpp

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//
// Copyright (c) 2017 CNRS, NYU, MPI Tübingen
//

#ifndef __invdyn_contact_point_hpp__
#define __invdyn_contact_point_hpp__

#include "tsid/contacts/contact-base.hpp"
#include "tsid/tasks/task-se3-equality.hpp"
#include "tsid/math/constraint-inequality.hpp"
#include "tsid/math/constraint-equality.hpp"

namespace tsid {
namespace contacts {
class ContactPoint : public ContactBase {
 public:
 EIGEN_MAKE_ALIGNED_OPERATOR_NEW

 typedef math::ConstRefMatrix ConstRefMatrix;
 typedef math::ConstRefVector ConstRefVector;
 typedef math::Matrix3x Matrix3x;
 typedef math::Vector6 Vector6;
 typedef math::Vector3 Vector3;
 typedef math::Vector Vector;
 typedef tasks::TaskSE3Equality TaskSE3Equality;
 typedef math::ConstraintInequality ConstraintInequality;
 typedef math::ConstraintEquality ConstraintEquality;
 typedef pinocchio::SE3 SE3;

 ContactPoint(const std::string& name, RobotWrapper& robot,
 const std::string& frameName, ConstRefVector contactNormal,
 const double frictionCoefficient, const double minNormalForce,
 const double maxNormalForce);

 unsigned int n_motion() const override;

 unsigned int n_force() const override;

 const ConstraintBase& computeMotionTask(double t, ConstRefVector q,
 ConstRefVector v,
 Data& data) override;

 const ConstraintInequality& computeForceTask(double t, ConstRefVector q,
 ConstRefVector v,
 const Data& data) override;

 const Matrix& getForceGeneratorMatrix() override;

 const ConstraintEquality& computeForceRegularizationTask(
 double t, ConstRefVector q, ConstRefVector v, const Data& data) override;

 const TaskSE3Equality& getMotionTask() const override;
 const ConstraintBase& getMotionConstraint() const override;
 const ConstraintInequality& getForceConstraint() const override;
 const ConstraintEquality& getForceRegularizationTask() const override;
 double getMotionTaskWeight() const;
 const Matrix3x& getContactPoints() const override;

 double getNormalForce(ConstRefVector f) const override;
 double getMinNormalForce() const override;
 double getMaxNormalForce() const override;

 const Vector&
 Kp(); // cannot be const because it set a member variable inside
 const Vector&
 Kd(); // cannot be const because it set a member variable inside
 void Kp(ConstRefVector Kp);
 void Kd(ConstRefVector Kp);

 bool setContactNormal(ConstRefVector contactNormal);

 bool setFrictionCoefficient(const double frictionCoefficient);
 bool setMinNormalForce(const double minNormalForce) override;
 bool setMaxNormalForce(const double maxNormalForce) override;
 bool setMotionTaskWeight(const double w);
 void setReference(const SE3& ref);
 void setForceReference(ConstRefVector& f_ref);
 void setRegularizationTaskWeightVector(ConstRefVector& w);

 void useLocalFrame(bool local_frame);

 protected:
 void updateForceInequalityConstraints();
 void updateForceRegularizationTask();
 void updateForceGeneratorMatrix();

 TaskSE3Equality m_motionTask;
 ConstraintInequality m_forceInequality;
 ConstraintEquality m_forceRegTask;
 Vector3 m_contactNormal;
 Vector3 m_fRef;
 Vector3 m_weightForceRegTask;
 Matrix3x m_contactPoints;
 Vector m_Kp3, m_Kd3; // gain vectors to be returned by reference
 double m_mu;
 double m_fMin;
 double m_fMax;
 double m_regularizationTaskWeight;
 double m_motionTaskWeight;
 Matrix m_forceGenMat;
};
} // namespace contacts
} // namespace tsid

#endif // ifndef __invdyn_contact_6d_hpp__