Enum Attenuation

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pub enum Attenuation {
    Constant,
    Linear,
    InverseSquare,
    WindowedInverseSquare {
        range: f32,
    },
    Math(MathFunction),
    Polynomial {
        constant: f32,
        linear: f32,
        quadratic: f32,
    },
}

Expand description

How a light’s intensity falls off with distance.

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Constant

No falloff: constant intensity regardless of distance.

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Linear

1/distance linear falloff.

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InverseSquare

1/distance^2 physically-based inverse square.

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WindowedInverseSquare

Windowed inverse square (smoothly cuts off at max_range): UE4 style.

Fields

§range: f32

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Math(MathFunction)

Custom MathFunction falloff evaluated at normalized distance [0,1].

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Polynomial

Polynomial: constant + lineard + quadraticd^2.

Fields

§constant: f32

§linear: f32

§quadratic: f32

Implementations§

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impl Attenuation

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pub fn evaluate(&self, distance: f32, max_range: f32) -> f32

Evaluate attenuation factor at distance with max_range hint.

Trait Implementations§

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impl Clone for Attenuation

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fn clone(&self) -> Attenuation

Returns a duplicate of the value. Read more

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

Performs copy-assignment from source. Read more

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impl Debug for Attenuation

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl UnwindSafe for Attenuation

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

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

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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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impl<T> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.

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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.

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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.

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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.

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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.

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