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ClusterBCDegradation

ballistics_engine::cluster_bc

Struct ClusterBCDegradation

pub struct ClusterBCDegradation;

Implementations§

impl ClusterBCDegradation

pub fn new() -> Self

pub fn predict_cluster(&self, caliber: f64, weight_gr: f64, bc_g1: f64) -> usize

Predict which cluster a bullet belongs to.

Rule-based classifier ported verbatim from the Python reference predict_cluster. caliber must be in INCHES (the sectional-density and form-factor thresholds are inch-referenced); passing meters misclassifies.

pub fn predict_cluster_for_drag_model( &self, caliber: f64, weight_gr: f64, bc: f64, drag_model: DragModel, ) -> usize

Predict a cluster from a BC expressed in its active reference-model space.

The legacy classifier is G1-keyed. G7 values are converted to the same approximate G1 space used by the Python source of truth before applying those unchanged gates. Other drag models retain the legacy behavior.

pub fn get_bc_multiplier(&self, velocity_fps: f64, cluster_id: usize) -> f64

Get the BC multiplier for a given velocity and cluster.

Mirrors the Python reference: iterate the cluster’s bands (descending threshold); at the first band whose threshold <= velocity, return the band multiplier if it is the top band, otherwise linearly interpolate between it and the band above. Below the lowest threshold, return the last band’s multiplier. Unknown clusters fall back to cluster 0 (matching Python, which coerces an unknown id to the standard profile — NOT to 1.0).

pub fn get_cluster_name(&self, cluster_id: usize) -> &'static str

Get cluster name for display

pub fn apply_correction( &self, bc: f64, caliber: f64, weight_gr: f64, velocity_fps: f64, ) -> f64

Legacy G1 entry point retained for API compatibility.

The active multiplier ladder is G7-referenced, so G1 correction is intentionally an identity. Use Self::apply_correction_for_drag_model with DragModel::G7 to apply the calibrated ladder.

pub fn apply_correction_for_drag_model( &self, bc: f64, caliber: f64, weight_gr: f64, velocity_fps: f64, drag_model: DragModel, ) -> f64

Apply cluster-based BC correction when the BC is in G7 reference-model space.

The velocity ladders are G7-derived ratios and are not physically valid for G1/G2/etc.; non-G7 inputs are returned byte-identically unchanged (MBA-1179). For G7, the classifier’s thresholds are G1-keyed, so the BC is converted to an approximate G1 equivalent for classification only; the selected multiplier still scales the original G7 value.

Trait Implementations§

impl Clone for ClusterBCDegradation

fn clone(&self) -> ClusterBCDegradation

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

impl Copy for ClusterBCDegradation

impl Debug for ClusterBCDegradation

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

Formats the value using the given formatter. Read more

impl Default for ClusterBCDegradation

fn default() -> ClusterBCDegradation

Returns the “default value” for a type. Read more

Auto Trait Implementations§

impl Freeze for ClusterBCDegradation

impl RefUnwindSafe for ClusterBCDegradation

impl Send for ClusterBCDegradation

impl Sync for ClusterBCDegradation

impl Unpin for ClusterBCDegradation

impl UnsafeUnpin for ClusterBCDegradation

impl UnwindSafe for ClusterBCDegradation

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> Same for T

type Output = T

Should always be Self

impl<SS, SP> SupersetOf<SS> for SP
where SS: SubsetOf<SP>,

fn to_subset(&self) -> Option<SS>

The inverse inclusion map: attempts to construct self from the equivalent element of its superset. Read more

fn is_in_subset(&self) -> bool

Checks if self is actually part of its subset T (and can be converted to it).

fn to_subset_unchecked(&self) -> SS

Use with care! Same as self.to_subset but without any property checks. Always succeeds.

fn from_subset(element: &SS) -> SP

The inclusion map: converts self to the equivalent element of its superset.

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.