Struct BugIntegrator 

pub struct BugIntegrator {
    pub config: BugConfig,
    pub g: f64,
    /* private fields */
}

BUG (Basis Update & Galerkin) integrator for low-rank tensor formats.

When the representation is an HtTensor, this integrator evolves the solution directly on the low-rank manifold via K/L/S-step updates. For other representations, it falls back to standard Strang splitting.

Fields

config: BugConfig

BUG algorithm parameters (tolerance, max rank, midpoint, conservative).

g: f64

Gravitational constant G used for the Poisson solve.

Implementations

impl BugIntegrator

pub fn new(g: f64, config: BugConfig) -> Self

Create a new BUG integrator with the given gravitational constant and configuration.

Trait Implementations

impl TimeIntegrator for BugIntegrator

fn advance( &mut self, repr: &mut dyn PhaseSpaceRepr, solver: &dyn PoissonSolver, advector: &dyn Advector, dt: f64, ) -> Result<StepProducts, CausticError>

Advance the distribution by one timestep dt.

If the representation is HtTensor, performs a BUG step (standard or midpoint depending on config). Otherwise falls back to Strang splitting.

fn max_dt(&self, repr: &dyn PhaseSpaceRepr, cfl_factor: f64) -> f64

Dynamical-time CFL: dt <= cfl_factor / sqrt(G * rho_max).

fn last_step_timings(&self) -> Option<&StepTimings>

Return timing breakdown from the most recent step.

fn set_progress(&mut self, progress: Arc<StepProgress>)

Attach a progress reporter for intra-step TUI updates.

fn suggested_dt(&self) -> Option<f64>

Return a suggested Δt from the adaptive controller (if any). Default returns None; adaptive integrators override this.