Module hold_curve 

HoldCurve: a solved, sampled drop-vs-range curve read by interpolation, and the sampled-trajectory helpers it is built on (MBA-1361/MBA-1362).

Promoted out of the CLI binary (0.33.0 decision-support Task 8) so a library consumer can reuse it without the cli feature – starting with the constant-drop range-card work HoldCurve’s own doc comment already nominates as its next consumer. No feature gate: must compile for wasm32 (pure math over already-resolved inputs; no fs, no clap – CLI argument resolution, InverseSolverLoadArgs::resolve, stays in main.rs and constructs HoldCurveLoad there).

Structs

CardTruncation

A card that stopped short of the rows it was asked for, in the caller’s DISPLAY unit (MBA-1476 follow-up).

HoldCurve

A solved, sampled drop-vs-range curve expressed in ANGULAR units (MBA-1361/MBA-1362).

HoldCurveLoad

Everything one sampled hold curve needs, already in METRIC (MBA-1361/MBA-1362).

HoldPoint

One point read off a HoldCurve, in the ANGULAR units a hold is expressed in.

SampledFlight

A solved flight: the sampled grid, plus how far the bullet ACTUALLY got (MBA-1476).

Enums

MarkToRangeOutcome

Result of inverting the hold curve for one mark subtension (MBA-1362).

Constants

CARD_SAMPLE_INTERVAL_M

Distance interval every DOPE-card surface samples its trajectory on, meters (~1 yard).

Functions

build_trajectory_components

Shared: build BallisticInputs + atmosphere + wind from common parameters (all in metric)

card_sample_max_range_m

How far out a card’s trajectory must be solved and sampled, given the furthest row it asked for (end_m). Meters in, meters out.

range_not_sampled_message

The one wording every card surface uses when its solved flight supplies NONE of the rows asked for (MBA-1476) — stated in the caller’s display unit, because that is the unit the request named the range in.

run_sampled_flight

Run a trajectory and return its sampled points AND its terminal reach at the given zero angle. See SampledFlight for why the reach is carried out alongside the samples.

run_sampled_trajectory

Run a trajectory and return sampled points at the given zero angle.

sample_at_range

Read a sampled trajectory at an EXACT range by linear interpolation between the two samples that bracket it (MBA-1476).