Struct TruingTwist 

pub struct TruingTwist {
    pub rate_in: f64,
    pub right_hand: bool,
}

Barrel twist supplied to the truing forward model (MBA-1392).

Drop-only truing never needed a twist rate — gyroscopic spin drift is a purely lateral effect and the fit only ever looked at vertical drop. Back-solving wind from an observed HORIZONTAL miss does need it: the spin component of that miss has to be modelled, or it is mistaken for wind. Supplying this turns crate::BallisticInputs::use_enhanced_spin_drift on for the truing solves; omitting it leaves the flag off, exactly as every pre-MBA-1392 truing solve did.

Fields

rate_in: f64

Twist rate in inches per turn, positive (e.g. 11.0 for a 1:11“ barrel).

right_hand: bool

true = right-hand twist (drifts RIGHT), false = left-hand (drifts LEFT).

Trait Implementations

impl Clone for TruingTwist

fn clone(&self) -> TruingTwist

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TruingTwist

impl Debug for TruingTwist

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

Formats the value using the given formatter.

impl PartialEq for TruingTwist

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for TruingTwist