Enum AttenuationModel 

pub enum AttenuationModel {
    None,
    Linear,
    InverseSquare,
    Quadratic {
        constant: f32,
        linear: f32,
        quadratic: f32,
    },
    SmoothUE4,
    CustomCurve {
        samples: Vec<f32>,
    },
}

Describes how light intensity falls off with distance.

Variants

None

No falloff — constant intensity within radius.

Linear

Linear falloff: 1 - d/r.

InverseSquare

Inverse-square (physically based): 1 / (1 + d^2).

Quadratic

Quadratic with configurable constant, linear, and quadratic terms.

Fields

constant: f32

linear: f32

quadratic: f32

SmoothUE4

Smooth Unreal Engine 4 style: saturate(1 - (d/r)^4)^2.

CustomCurve

Custom falloff curve sampled from a lookup table (evenly spaced from 0..radius).

Fields

samples: Vec<f32>

Intensity values sampled at even intervals from distance 0 to radius.

Implementations

impl AttenuationModel

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

Evaluate attenuation at the given distance from the light with the given radius.

Trait Implementations

impl Clone for AttenuationModel

fn clone(&self) -> AttenuationModel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AttenuationModel

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

Formats the value using the given formatter.

impl Default for AttenuationModel

fn default() -> Self

Returns the “default value” for a type.