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BcSegmentV1

Struct BcSegmentV1 

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pub struct BcSegmentV1 {
    pub velocity_min_mps: f64,
    pub velocity_max_mps: f64,
    pub ballistic_coefficient: f64,
}
Expand description

One band of a ProjectileV1::bc_segments ladder: the BC that flies while the bullet’s airspeed lies in [velocity_min_mps, velocity_max_mps).

  • Band BCs are in lb/in², referenced to the same curve as the scalar ballistic_coefficient (projectile.drag_model, or a reference-kind projectile.drag_table), and held to the same bounds.
  • Bands are selected by airspeed: the bullet’s speed relative to the air mass, not over the ground.
  • The array runs from the fastest band to the slowest. velocity_min_mps strictly descends, and each band ends at or below the start of the band before it: touching edges and gaps are legal, overlaps are not. The order is only a validation rule; the lookup itself does not depend on it.
  • A ladder holds MIN_BC_SEGMENTS_V1 to MAX_BC_SEGMENTS_V1 bands.
  • In an interior gap between two bands the scalar ballistic_coefficient flies. Below the lowest band, or at or above the highest, the nearest edge band applies, so under a gapless ladder the scalar never flies.
  • A one-band ladder flies its band’s BC at every speed, so that BC must match the scalar ballistic_coefficient to within ONE_BAND_BC_RELATIVE_TOLERANCE_V1; the band’s edges then change nothing.
  • Every interior band-to-band edge and every gap edge is blended with a smoothstep across a narrow window centred on it, so the integrator never sees the drag jump in one step (velocity_segment_bc in src/bc_estimation.rs).

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§velocity_min_mps: f64

Lower edge of the band, m/s, inclusive. Finite and >= 0.

§velocity_max_mps: f64

Upper edge of the band, m/s, exclusive. Finite and > velocity_min_mps; there is no upper bound.

§ballistic_coefficient: f64

This band’s BC, lb/in² against the same curve as the scalar ballistic_coefficient (projectile.drag_model, or a reference-kind projectile.drag_table). Same bounds as the scalar.

Trait Implementations§

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impl Clone for BcSegmentV1

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fn clone(&self) -> Self

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
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impl Copy for BcSegmentV1

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impl Debug for BcSegmentV1

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for BcSegmentV1

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq for BcSegmentV1

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more
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impl Serialize for BcSegmentV1

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for BcSegmentV1

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impl<T> Any for T
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Gets the TypeId of self. Read more
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fn borrow(&self) -> &T

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

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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
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Calls U::from(self).

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Checks if self is actually part of its subset T (and can be converted to it).
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fn to_subset_unchecked(&self) -> SS

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