free-fwddyn.hpp

// BSD 3-Clause License
//
// Copyright (C) 2019-2025, LAAS-CNRS, University of Edinburgh,
//                          Heriot-Watt University
// Copyright note valid unless otherwise stated in individual files.
// All rights reserved.
 
#ifndef CROCODDYL_MULTIBODY_ACTIONS_FREE_FWDDYN_HPP_
#define CROCODDYL_MULTIBODY_ACTIONS_FREE_FWDDYN_HPP_
 
#include "crocoddyl/core/actuation-base.hpp"
#include "crocoddyl/core/constraints/constraint-manager.hpp"
#include "crocoddyl/core/costs/cost-sum.hpp"
#include "crocoddyl/core/diff-action-base.hpp"
#include "crocoddyl/multibody/data/multibody.hpp"
#include "crocoddyl/multibody/fwd.hpp"
#include "crocoddyl/multibody/states/multibody.hpp"
 
namespace crocoddyl {
 
template <typename _Scalar>
class DifferentialActionModelFreeFwdDynamicsTpl
    : public DifferentialActionModelAbstractTpl<_Scalar> {
 public:
  EIGEN_MAKE_ALIGNED_OPERATOR_NEW
  CROCODDYL_DERIVED_CAST(DifferentialActionModelBase,
                         DifferentialActionModelFreeFwdDynamicsTpl)
 
  typedef _Scalar Scalar;
  typedef DifferentialActionModelAbstractTpl<Scalar> Base;
  typedef DifferentialActionDataFreeFwdDynamicsTpl<Scalar> Data;
  typedef DifferentialActionDataAbstractTpl<Scalar>
      DifferentialActionDataAbstract;
  typedef StateMultibodyTpl<Scalar> StateMultibody;
  typedef CostModelSumTpl<Scalar> CostModelSum;
  typedef ConstraintModelManagerTpl<Scalar> ConstraintModelManager;
  typedef ActuationModelAbstractTpl<Scalar> ActuationModelAbstract;
  typedef MathBaseTpl<Scalar> MathBase;
  typedef typename MathBase::VectorXs VectorXs;
  typedef typename MathBase::MatrixXs MatrixXs;
 
  DifferentialActionModelFreeFwdDynamicsTpl(
      std::shared_ptr<StateMultibody> state,
      std::shared_ptr<ActuationModelAbstract> actuation,
      std::shared_ptr<CostModelSum> costs,
      std::shared_ptr<ConstraintModelManager> constraints = nullptr);
  virtual ~DifferentialActionModelFreeFwdDynamicsTpl() = default;
 
  virtual void calc(const std::shared_ptr<DifferentialActionDataAbstract>& data,
                    const Eigen::Ref<const VectorXs>& x,
                    const Eigen::Ref<const VectorXs>& u) override;
 
  virtual void calc(const std::shared_ptr<DifferentialActionDataAbstract>& data,
                    const Eigen::Ref<const VectorXs>& x) override;
 
  virtual void calcDiff(
      const std::shared_ptr<DifferentialActionDataAbstract>& data,
      const Eigen::Ref<const VectorXs>& x,
      const Eigen::Ref<const VectorXs>& u) override;
 
  virtual void calcDiff(
      const std::shared_ptr<DifferentialActionDataAbstract>& data,
      const Eigen::Ref<const VectorXs>& x) override;
 
  virtual std::shared_ptr<DifferentialActionDataAbstract> createData() override;
 
  template <typename NewScalar>
  DifferentialActionModelFreeFwdDynamicsTpl<NewScalar> cast() const;
 
  virtual bool checkData(
      const std::shared_ptr<DifferentialActionDataAbstract>& data) override;
 
  virtual void quasiStatic(
      const std::shared_ptr<DifferentialActionDataAbstract>& data,
      Eigen::Ref<VectorXs> u, const Eigen::Ref<const VectorXs>& x,
      const std::size_t maxiter = 100,
      const Scalar tol = Scalar(1e-9)) override;
 
  virtual std::size_t get_ng() const override;
 
  virtual std::size_t get_nh() const override;
 
  virtual std::size_t get_ng_T() const override;
 
  virtual std::size_t get_nh_T() const override;
 
  virtual const VectorXs& get_g_lb() const override;
 
  virtual const VectorXs& get_g_ub() const override;
 
  const std::shared_ptr<ActuationModelAbstract>& get_actuation() const;
 
  const std::shared_ptr<CostModelSum>& get_costs() const;
 
  const std::shared_ptr<ConstraintModelManager>& get_constraints() const;
 
  pinocchio::ModelTpl<Scalar>& get_pinocchio() const;
 
  const VectorXs& get_armature() const;
 
  void set_armature(const VectorXs& armature);
 
  virtual void print(std::ostream& os) const override;
 
 protected:
  using Base::g_lb_;   
  using Base::g_ub_;   
  using Base::nu_;     
  using Base::state_;  
 
 private:
  std::shared_ptr<ActuationModelAbstract> actuation_;    
  std::shared_ptr<CostModelSum> costs_;                  
  std::shared_ptr<ConstraintModelManager> constraints_;  
  pinocchio::ModelTpl<Scalar>* pinocchio_;               
  bool without_armature_;  
  VectorXs armature_;      
};
 
template <typename _Scalar>
struct DifferentialActionDataFreeFwdDynamicsTpl
    : public DifferentialActionDataAbstractTpl<_Scalar> {
  EIGEN_MAKE_ALIGNED_OPERATOR_NEW
  typedef _Scalar Scalar;
  typedef MathBaseTpl<Scalar> MathBase;
  typedef DifferentialActionDataAbstractTpl<Scalar> Base;
  typedef JointDataAbstractTpl<Scalar> JointDataAbstract;
  typedef DataCollectorJointActMultibodyTpl<Scalar>
      DataCollectorJointActMultibody;
  typedef typename MathBase::VectorXs VectorXs;
  typedef typename MathBase::MatrixXs MatrixXs;
 
  template <template <typename Scalar> class Model>
  explicit DifferentialActionDataFreeFwdDynamicsTpl(Model<Scalar>* const model)
      : Base(model),
        pinocchio(pinocchio::DataTpl<Scalar>(model->get_pinocchio())),
        multibody(
            &pinocchio, model->get_actuation()->createData(),
            std::make_shared<JointDataAbstract>(
                model->get_state(), model->get_actuation(), model->get_nu())),
        costs(model->get_costs()->createData(&multibody)),
        Minv(model->get_state()->get_nv(), model->get_state()->get_nv()),
        u_drift(model->get_state()->get_nv()),
        dtau_dx(model->get_state()->get_nv(), model->get_state()->get_ndx()),
        tmp_xstatic(model->get_state()->get_nx()) {
    multibody.joint->dtau_du.diagonal().setOnes();
    costs->shareMemory(this);
    if (model->get_constraints() != nullptr) {
      constraints = model->get_constraints()->createData(&multibody);
      constraints->shareMemory(this);
    }
    Minv.setZero();
    u_drift.setZero();
    dtau_dx.setZero();
    tmp_xstatic.setZero();
  }
  virtual ~DifferentialActionDataFreeFwdDynamicsTpl() = default;
 
  pinocchio::DataTpl<Scalar> pinocchio;
  DataCollectorJointActMultibody multibody;
  std::shared_ptr<CostDataSumTpl<Scalar> > costs;
  std::shared_ptr<ConstraintDataManagerTpl<Scalar> > constraints;
  MatrixXs Minv;
  VectorXs u_drift;
  MatrixXs dtau_dx;
  VectorXs tmp_xstatic;
 
  using Base::cost;
  using Base::Fu;
  using Base::Fx;
  using Base::Lu;
  using Base::Luu;
  using Base::Lx;
  using Base::Lxu;
  using Base::Lxx;
  using Base::r;
  using Base::xout;
};
 
}  // namespace crocoddyl
 
/* --- Details -------------------------------------------------------------- */
/* --- Details -------------------------------------------------------------- */
/* --- Details -------------------------------------------------------------- */
#include <crocoddyl/multibody/actions/free-fwddyn.hxx>
 
CROCODDYL_DECLARE_EXTERN_TEMPLATE_CLASS(
    crocoddyl::DifferentialActionModelFreeFwdDynamicsTpl)
CROCODDYL_DECLARE_EXTERN_TEMPLATE_STRUCT(
    crocoddyl::DifferentialActionDataFreeFwdDynamicsTpl)
 
#endif  // CROCODDYL_MULTIBODY_ACTIONS_FREE_FWDDYN_HPP_