Struct LightProbeGrid 

pub struct LightProbeGrid {
    pub min: Vec3,
    pub max: Vec3,
    pub resolution: [u32; 3],
    pub probes: Vec<Sh3>,
}

A regular 3D grid of SH3 irradiance probes.

At runtime, shaders can trilinearly interpolate between the 8 nearest probes to get smooth irradiance at any position within the grid bounds.

Fields

min: Vec3

World-space AABB minimum corner.

max: Vec3

World-space AABB maximum corner.

resolution: [u32; 3]

Number of probes along each axis.

probes: Vec<Sh3>

Flat probe storage, in x-major order (x + yrx + zrx*ry).

Implementations

impl LightProbeGrid

pub fn new(min: Vec3, max: Vec3, resolution: [u32; 3]) -> Self

Create a grid with all probes initialised to zero.

pub fn cell_size(&self) -> Vec3

Cell size along each axis.

pub fn probe_at(&self, ix: usize, iy: usize, iz: usize) -> &Sh3

Get a reference to the probe at grid coordinates.

pub fn probe_at_mut(&mut self, ix: usize, iy: usize, iz: usize) -> &mut Sh3

Get a mutable reference to the probe at grid coordinates.

pub fn sample(&self, pos: Vec3) -> Sh3

Trilinearly interpolate SH3 at world-space position pos.

pub fn compute_ambient(&self, pos: Vec3, normal: Vec3) -> Vec3

Compute ambient irradiance at pos for a surface with normal.

Trait Implementations

impl Clone for LightProbeGrid

fn clone(&self) -> LightProbeGrid

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LightProbeGrid

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

Formats the value using the given formatter.