Struct nyx_space::propagators::RK2Fixed

pub struct RK2Fixed {}

RK2Fixed is a fixed step RK4 (or midpoint method).

If initialized with an PropOpts.with_adaptive_step, the variable step will not be taken into consideration.

Trait Implementations

impl RK for RK2Fixed

fn order() -> u8

Returns the order of this integrator (as u8 because there probably isn't an order greater than 255). The order is used for the adaptive step size only to compute the error between estimates.

fn stages() -> usize

Returns the stages of this integrator (as usize because it's used as indexing)

fn a_coeffs() -> &'static [f64]

Returns a pointer to a list of f64 corresponding to the A coefficients of the Butcher table for that RK. This module only supports implicit integrators, and as such, Self.a_coeffs().len() must be of size (order+1)*(order)/2. Warning: this RK trait supposes that the implementation is consistent, i.e. c_i = \sum_j a_{ij}.

fn b_coeffs() -> &'static [f64]

Returns a pointer to a list of f64 corresponding to the b_i and b^*_i coefficients of the Butcher table for that RK. Self.a_coeffs().len() must be of size (order+1)*2.