Directory: | ./ |
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File: | bindings/python/crocoddyl/multibody/contact-base.cpp |
Date: | 2025-03-26 19:23:43 |
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1 | /////////////////////////////////////////////////////////////////////////////// | ||
2 | // BSD 3-Clause License | ||
3 | // | ||
4 | // Copyright (C) 2019-2025, LAAS-CNRS, University of Edinburgh, | ||
5 | // Heriot-Watt University | ||
6 | // Copyright note valid unless otherwise stated in individual files. | ||
7 | // All rights reserved. | ||
8 | /////////////////////////////////////////////////////////////////////////////// | ||
9 | |||
10 | #include "python/crocoddyl/multibody/contact-base.hpp" | ||
11 | |||
12 | #include "python/crocoddyl/multibody/multibody.hpp" | ||
13 | |||
14 | namespace crocoddyl { | ||
15 | namespace python { | ||
16 | |||
17 | template <typename Model> | ||
18 | struct ContactModelAbstractVisitor | ||
19 | : public bp::def_visitor<ContactModelAbstractVisitor<Model>> { | ||
20 | template <class PyClass> | ||
21 | 40 | void visit(PyClass& cl) const { | |
22 |
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40 | cl.def("calc", pure_virtual(&Model::calc), bp::args("self", "data", "x"), |
23 | "Compute the contact Jacobian and drift.\n\n" | ||
24 | "The rigid contact model throught acceleration-base holonomic " | ||
25 | "constraint of the contact frame placement.\n" | ||
26 | ":param data: contact data\n" | ||
27 | ":param x: state point (dim. state.nx)") | ||
28 |
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80 | .def("calcDiff", pure_virtual(&Model::calcDiff), |
29 | bp::args("self", "data", "x"), | ||
30 | "Compute the derivatives of contact holonomic constraint.\n\n" | ||
31 | "The rigid contact model throught acceleration-base holonomic " | ||
32 | "constraint of the contact frame placement. It assumes that calc " | ||
33 | "has been run first.\n" | ||
34 | ":param data: contact data\n" | ||
35 | ":param x: state point (dim. state.nx)") | ||
36 |
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80 | .def("updateForce", pure_virtual(&Model::updateForce), |
37 | bp::args("self", "data", "force"), | ||
38 | "Convert the force into a stack of spatial forces.\n\n" | ||
39 | ":param data: contact data\n" | ||
40 | ":param force: force vector (dimension nc)") | ||
41 |
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80 | .def("updateForceDiff", &Model::updateForceDiff, |
42 | bp::args("self", "data", "df_dx", "df_du"), | ||
43 | "Update the Jacobians of the force.\n\n" | ||
44 | ":param data: contact data\n" | ||
45 | ":param df_dx: Jacobian of the force with respect to the state\n" | ||
46 | ":param df_du: Jacobian of the force with respect to the control") | ||
47 |
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80 | .def("setZeroForce", &Model::setZeroForce, bp::args("self", "data"), |
48 | "Set zero the spatial force.\n\n" | ||
49 | ":param data: contact data") | ||
50 |
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80 | .def("setZeroForceDiff", &Model::setZeroForceDiff, |
51 | bp::args("self", "data"), | ||
52 | "Set zero the derivatives of the spatial force.\n\n" | ||
53 | ":param data: contact data") | ||
54 |
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80 | .def("createData", &Model::createData, |
55 | ✗ | bp::with_custodian_and_ward_postcall<0, 2>(), | |
56 | bp::args("self", "data"), | ||
57 | "Create the contact data.\n\n" | ||
58 | "Each contact model has its own data that needs to be allocated. " | ||
59 | "This function returns the allocated data for a predefined " | ||
60 | "contact.\n" | ||
61 | ":param data: Pinocchio data\n" | ||
62 | ":return contact data.") | ||
63 |
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40 | .def("createData", &Model::default_createData, |
64 | ✗ | bp::with_custodian_and_ward_postcall<0, 2>()) | |
65 |
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40 | .add_property( |
66 | "state", | ||
67 | bp::make_function(&Model::get_state, | ||
68 | 40 | bp::return_value_policy<bp::return_by_value>()), | |
69 | "state of the multibody system") | ||
70 |
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80 | .add_property("nc", bp::make_function(&Model::get_nc), |
71 | "dimension of contact") | ||
72 |
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80 | .add_property("nu", bp::make_function(&Model::get_nu), |
73 | "dimension of control") | ||
74 | 80 | .add_property("id", &Model::get_id, &Model::set_id, | |
75 | "reference frame id") | ||
76 |
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40 | .add_property("type", bp::make_function(&Model::get_type), |
77 | &Model::set_type, "type of contact"); | ||
78 | 40 | } | |
79 | }; | ||
80 | |||
81 | template <typename Data> | ||
82 | struct ContactDataAbstractVisitor | ||
83 | : public bp::def_visitor<ContactDataAbstractVisitor<Data>> { | ||
84 | template <class PyClass> | ||
85 | 40 | void visit(PyClass& cl) const { | |
86 |
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40 | cl.add_property( |
87 | 40 | "fXj", bp::make_getter(&Data::fXj, bp::return_internal_reference<>()), | |
88 | bp::make_setter(&Data::fXj), | ||
89 | "action matrix from contact to local frames") | ||
90 |
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80 | .add_property( |
91 | 40 | "a0", bp::make_getter(&Data::a0, bp::return_internal_reference<>()), | |
92 | bp::make_setter(&Data::a0), "desired contact acceleration") | ||
93 |
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80 | .add_property( |
94 | "da0_dx", | ||
95 | 40 | bp::make_getter(&Data::da0_dx, bp::return_internal_reference<>()), | |
96 | bp::make_setter(&Data::da0_dx), | ||
97 | "Jacobian of the desired contact acceleration") | ||
98 |
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80 | .add_property( |
99 | "dtau_dq", | ||
100 | 40 | bp::make_getter(&Data::dtau_dq, bp::return_internal_reference<>()), | |
101 | bp::make_setter(&Data::dtau_dq), "Force contribution to dtau_dq"); | ||
102 | 40 | } | |
103 | }; | ||
104 | |||
105 | #define CROCODDYL_CONTACT_MODEL_ABSTRACT_PYTHON_BINDINGS(Scalar) \ | ||
106 | typedef ContactModelAbstractTpl<Scalar> Model; \ | ||
107 | typedef ContactModelAbstractTpl_wrap<Scalar> Model_wrap; \ | ||
108 | typedef Model::StateMultibody State; \ | ||
109 | bp::register_ptr_to_python<std::shared_ptr<Model>>(); \ | ||
110 | bp::class_<Model_wrap, boost::noncopyable>( \ | ||
111 | "ContactModelAbstract", \ | ||
112 | "Abstract rigid contact model.\n\n" \ | ||
113 | "It defines a template for rigid contact models based on " \ | ||
114 | "acceleration-based holonomic constraints. The calc and calcDiff " \ | ||
115 | "functions compute the contact Jacobian and drift (holonomic " \ | ||
116 | "constraint) or the derivatives of the holonomic constraint, " \ | ||
117 | "respectively.", \ | ||
118 | bp::init<std::shared_ptr<State>, pinocchio::ReferenceFrame, std::size_t, \ | ||
119 | bp::optional<std::size_t>>( \ | ||
120 | bp::args("self", "state", "type", "nc", "nu"), \ | ||
121 | "Initialize the contact model.\n\n" \ | ||
122 | ":param state: state of the multibody system\n" \ | ||
123 | ":param type: type of contact\n" \ | ||
124 | ":param nc: dimension of contact model\n" \ | ||
125 | ":param nu: dimension of the control vector (default state.nv)")) \ | ||
126 | .def(ContactModelAbstractVisitor<Model_wrap>()) \ | ||
127 | .def(PrintableVisitor<Model_wrap>()) \ | ||
128 | .def(CopyableVisitor<Model_wrap>()); | ||
129 | |||
130 | #define CROCODDYL_CONTACT_DATA_ABSTRACT_PYTHON_BINDINGS(Scalar) \ | ||
131 | typedef ContactDataAbstractTpl<Scalar> Data; \ | ||
132 | typedef ContactModelAbstractTpl<Scalar> Model; \ | ||
133 | typedef ForceDataAbstractTpl<Scalar> ForceData; \ | ||
134 | typedef pinocchio::DataTpl<Scalar> PinocchioData; \ | ||
135 | bp::register_ptr_to_python<std::shared_ptr<Data>>(); \ | ||
136 | bp::class_<Data, bp::bases<ForceData>>( \ | ||
137 | "ContactDataAbstract", "Abstract class for contact datas.\n\n", \ | ||
138 | bp::init<Model*, PinocchioData*>( \ | ||
139 | bp::args("self", "model", "data"), \ | ||
140 | "Create common data shared between contact models.\n\n" \ | ||
141 | ":param model: contact model\n" \ | ||
142 | ":param data: Pinocchio data")[bp::with_custodian_and_ward< \ | ||
143 | 1, 2, bp::with_custodian_and_ward<1, 3>>()]) \ | ||
144 | .def(ContactDataAbstractVisitor<Data>()) \ | ||
145 | .def(CopyableVisitor<Data>()); | ||
146 | |||
147 | 10 | void exposeContactAbstract() { | |
148 |
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20 | CROCODDYL_PYTHON_SCALARS(CROCODDYL_CONTACT_MODEL_ABSTRACT_PYTHON_BINDINGS) |
149 |
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20 | CROCODDYL_PYTHON_SCALARS(CROCODDYL_CONTACT_DATA_ABSTRACT_PYTHON_BINDINGS) |
150 | 10 | } | |
151 | |||
152 | } // namespace python | ||
153 | } // namespace crocoddyl | ||
154 |