Struct TransmittanceLut 

pub struct TransmittanceLut {
    pub width: usize,
    pub height: usize,
    pub data: Vec<Vec3>,
    pub params: AtmosphereParams,
}

Precomputed transmittance lookup table.

Parameterised by (cos_zenith, altitude) where:

• cos_zenith in [-1, 1] — cosine of zenith angle
• altitude in [0, radius_atm - radius_planet] — height above surface (m)

Fields

width: usize

height: usize

data: Vec<Vec3>

params: AtmosphereParams

Implementations

impl TransmittanceLut

pub fn compute(params: &AtmosphereParams) -> Self

Compute the transmittance LUT.

pub fn sample(&self, cos_zenith: f32, altitude: f32) -> Vec3

Bilinearly sample the LUT.

cos_zenith in [-1, 1], altitude in metres [0, atm_thickness].