Struct AreaLight 

pub struct AreaLight {
    pub position: Vec3,
    pub right: Vec3,
    pub up: Vec3,
    pub color: Vec3,
    pub intensity: f32,
}

Rectangular area light using the Linearly Transformed Cosines (LTC) approach.

Fields

position: Vec3

Centre of the rectangle.

right: Vec3

Half-extent along the “right” axis (width/2).

up: Vec3

Half-extent along the “up” axis (height/2).

color: Vec3

intensity: f32

Implementations

impl AreaLight

pub fn new( position: Vec3, right: Vec3, up: Vec3, color: Vec3, intensity: f32, ) -> Self

pub fn corners(&self) -> [Vec3; 4]

Compute the four corner positions of the rectangle.

pub fn area(&self) -> f32

Area of the rectangle.

pub fn normal(&self) -> Vec3

Normal of the area light face.

pub fn solid_angle_at(&self, pos: Vec3) -> f32

Approximate the solid angle subtended by the area light at pos.

pub fn irradiance_at(&self, pos: Vec3, n: Vec3) -> Vec3

Simple irradiance estimate using solid angle and projected area.

Trait Implementations

impl Clone for AreaLight

fn clone(&self) -> AreaLight

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AreaLight

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

Formats the value using the given formatter.