Struct LtraModel 

pub struct LtraModel {

    pub r: Option<f64>,
    pub l: Option<f64>,
    pub g: Option<f64>,
    pub c: Option<f64>,
    pub len: Option<f64>,
    pub rel: Option<f64>,
    pub abs: Option<f64>,
    pub steplimit: bool,
    pub interp: Option<LtraInterp>,
    pub truncnr: bool,
    pub truncdontcut: bool,
    pub compactrel: f64,
    pub compactabs: f64,
}

.model … ltra(…) parameters, 3f5 names (ltra.c model table, ltrampar.c; spice.txt §Lossy Transmission Lines). Per-unit- length quantities are multiplied by LEN.

Fields

r: Option<f64>

R: resistance per unit length (Ω); unset = 0 with a warning.

l: Option<f64>

L: inductance per unit length (H); unset = 0 with a warning.

g: Option<f64>

G: conductance per unit length (S); unset = 0.

c: Option<f64>

C: capacitance per unit length (F); unset = 0 with a warning.

len: Option<f64>

LEN: length of the line; required.

rel: Option<f64>

REL: relative rate of change of the derivative for breakpoint setting, default 1. (An output-only parameter in the 3f5 table; ngspice accepts it as input — corpus/KNOWN_DIFFS.md.)

abs: Option<f64>

ABS: absolute rate of change of the derivative for breakpoint setting, default 1 (same 3f5/ngspice note).

steplimit: bool

STEPLIMIT (true, the default) / NOSTEPLIMIT (false): limit the timestep to the line delay T. The last flag wins.

interp: Option<LtraInterp>

LININTERP/QUADINTERP/MIXEDINTERP; None = quadratic (linear under .options trytocompact).

truncnr: bool

TRUNCNR: Newton iterations for the LTE step estimate (only reachable with LTE control, which the parameter table never enables; kept for completeness).

truncdontcut: bool

TRUNCDONTCUT: do not limit the step by the impulse-response safe step (LTRAmaxSafeStep) of RLC lines.

compactrel: f64

COMPACTREL: reltol for the straight-line checks; 0 = the circuit RELTOL.

compactabs: f64

COMPACTABS: abstol for the straight-line checks; 0 = the circuit ABSTOL.

Trait Implementations

impl Clone for LtraModel

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LtraModel

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

Formats the value using the given formatter.

impl Default for LtraModel

fn default() -> Self

Returns the “default value” for a type.