Struct Langevin2D

pub struct Langevin2D {
    pub pos: SVector<f64, 2>,
    pub vel: SVector<f64, 2>,
    pub mass: f64,
    pub damping: f64,
    pub kb_temperature: f64,
}

Langevin dynamics

Parameters & Variables

Symbol	Struct Field	Description
$M$	mass	Mass of the particle.
$\gamma$	damping	Damping constant
$k_BT$	kb_temperature	Product of temperature $T$ and Boltzmann constant $k_B$.
$\vec{X}$	pos	Position of the particle.
$\dot{\vec{X}}$	vel	Velocity of the particle.
$R(t)$	(automatically generated)	Gaussian process

Equations

\begin{equation} M \ddot{\mathbf{X}} = - \mathbf{\nabla} U(\mathbf{X}) - \gamma M\dot{\mathbf{X}} + \sqrt{2 M \gamma k_{\rm B} T}\mathbf{R}(t) \end{equation}

Fields

pos: SVector<f64, 2>

Current position

vel: SVector<f64, 2>

Current velocity

mass: f64

Mass of the object

damping: f64

Damping constant

kb_temperature: f64

Product of Boltzmann constant and temperature

Implementations

impl Langevin2D

pub fn get_position(&self) -> [f64; 2]

Available on crate feature pyo3 only.

[pyo3] getter for position

pub fn set_position(&mut self, pos: [f64; 2])

Available on crate feature pyo3 only.

[pyo3] setter for position

pub fn get_damping(&self) -> f64

Available on crate feature pyo3 only.

[pyo3] getter for damping

pub fn set_damping(&mut self, damping: f64)

Available on crate feature pyo3 only.

[pyo3] setter for damping

pub fn get_mass(&self) -> f64

Available on crate feature pyo3 only.

[pyo3] getter for mass

pub fn set_mass(&mut self, mass: f64)

Available on crate feature pyo3 only.

[pyo3] setter for mass

pub fn get_kb_temperature(&self) -> f64

Available on crate feature pyo3 only.

[pyo3] getter for kb_temperature

pub fn set_kb_temperature(&mut self, kb_temperature: f64)

Available on crate feature pyo3 only.

[pyo3] setter for kb_temperature

Trait Implementations

impl Clone for Langevin2D

fn clone(&self) -> Langevin2D

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Langevin2D

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Langevin2D

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl IntoPy<Py<PyAny>> for Langevin2D

fn into_py(self, py: Python<'_>) -> PyObject

Performs the conversion.

impl Mechanics<Matrix<f64, Const<2>, Const<1>, ArrayStorage<f64, 2, 1>>, Matrix<f64, Const<2>, Const<1>, ArrayStorage<f64, 2, 1>>, Matrix<f64, Const<2>, Const<1>, ArrayStorage<f64, 2, 1>>> for Langevin2D

fn get_random_contribution( &self, rng: &mut ChaCha8Rng, dt: f64, ) -> Result<(SVector<f64, 2>, SVector<f64, 2>), RngError>

Define a new random variable in case that the mechanics type contains a random aspect to its motion. By default this function does nothing.

fn calculate_increment( &self, force: SVector<f64, 2>, ) -> Result<(SVector<f64, 2>, SVector<f64, 2>), CalcError>

Calculate the time-derivative of force and velocity given all the forces that act on the cell. Simple damping effects should be included in this trait if not explicitly given by the SubDomainForce trait.

impl PartialEq for Langevin2D

fn eq(&self, other: &Langevin2D) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Position<Matrix<f64, Const<2>, Const<1>, ArrayStorage<f64, 2, 1>>> for Langevin2D

fn pos(&self) -> SVector<f64, 2>

Gets the cells current position.

fn set_pos(&mut self, pos: &SVector<f64, 2>)

Gets the cells current velocity.

impl PyClass for Langevin2D

type Frozen = False

Whether the pyclass is frozen.

impl PyClassImpl for Langevin2D

const IS_BASETYPE: bool = false

#[pyclass(subclass)]

const IS_SUBCLASS: bool = false

#[pyclass(extends=…)]

const IS_MAPPING: bool = false

#[pyclass(mapping)]

const IS_SEQUENCE: bool = false

#[pyclass(sequence)]

type BaseType = PyAny

Base class

type ThreadChecker = SendablePyClass<Langevin2D>

This handles following two situations:

type PyClassMutability = <<PyAny as PyClassBaseType>::PyClassMutability as PyClassMutability>::MutableChild

Immutable or mutable

type Dict = PyClassDummySlot

Specify this class has #[pyclass(dict)] or not.

type WeakRef = PyClassDummySlot

Specify this class has #[pyclass(weakref)] or not.

type BaseNativeType = PyAny

The closest native ancestor. This is PyAny by default, and when you declare #[pyclass(extends=PyDict)], it’s PyDict.

fn items_iter() -> PyClassItemsIter

fn doc(py: Python<'_>) -> PyResult<&'static CStr>

Rendered class doc

fn lazy_type_object() -> &'static LazyTypeObject<Self>

fn dict_offset() -> Option<isize>

fn weaklist_offset() -> Option<isize>

impl PyClassNewTextSignature<Langevin2D> for PyClassImplCollector<Langevin2D>

fn new_text_signature(self) -> Option<&'static str>

impl<'a, 'py> PyFunctionArgument<'a, 'py> for &'a Langevin2D

type Holder = Option<PyRef<'py, Langevin2D>>

fn extract( obj: &'a Bound<'py, PyAny>, holder: &'a mut Self::Holder, ) -> PyResult<Self>

impl<'a, 'py> PyFunctionArgument<'a, 'py> for &'a mut Langevin2D

type Holder = Option<PyRefMut<'py, Langevin2D>>

fn extract( obj: &'a Bound<'py, PyAny>, holder: &'a mut Self::Holder, ) -> PyResult<Self>

impl PyMethods<Langevin2D> for PyClassImplCollector<Langevin2D>

fn py_methods(self) -> &'static PyClassItems

impl PyTypeInfo for Langevin2D

const NAME: &'static str = "Langevin2D"

Class name.

const MODULE: Option<&'static str> = ::core::option::Option::None

Module name, if any.

fn type_object_raw(py: Python<'_>) -> *mut PyTypeObject

Returns the PyTypeObject instance for this type.

fn type_object_bound(py: Python<'_>) -> Bound<'_, PyType>

Returns the safe abstraction over the type object.

fn is_type_of_bound(object: &Bound<'_, PyAny>) -> bool

Checks if object is an instance of this type or a subclass of this type.

fn is_exact_type_of_bound(object: &Bound<'_, PyAny>) -> bool

Checks if object is an instance of this type.

impl Serialize for Langevin2D

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Velocity<Matrix<f64, Const<2>, Const<1>, ArrayStorage<f64, 2, 1>>> for Langevin2D

fn velocity(&self) -> SVector<f64, 2>

Gets the cells current velocity.

fn set_velocity(&mut self, velocity: &SVector<f64, 2>)

Sets the cells current velocity.

impl DerefToPyAny for Langevin2D

impl StructuralPartialEq for Langevin2D