Struct FogFroxelParams 

#[repr(C)]
pub struct FogFroxelParams {
    pub view: [[f32; 4]; 4],
    pub froxel_dims: [u32; 3],
    pub _pad_align: u32,
    pub z_near: f32,
    pub z_far: f32,
    pub _pad: [f32; 2],
}

Per-frame uniform consumed by the volumetric-fog froxel compute kernel and the matching fragment-shader sample path. Carries the view matrix (so the compute kernel + the fragment sampler can map between world-space froxel positions and the volume’s Z axis) and the discrete volume dimensions. Used by the froxel-volume fog path; only worlds that declare a VolumetricFog bind it.

Bound at the fog fragment shader + the froxel kernel. Layout must stay in sync with FogFroxelParams in shaders/fog.slang, the single source both halves compile from on every backend. 96 bytes.

Fields

view: [[f32; 4]; 4]

View matrix (world → view), so the compute kernel can pick a CSM cascade for each froxel and the fragment sampler can map a scene depth into the volume’s Z slice index.

froxel_dims: [u32; 3]

Number of froxels along screen-x / screen-y / view-z.

_pad_align: u32

Explicit 4-byte pad so the MSL uint3 froxel_dims (which the MSL alignment rules promote to a 16-byte slot) and the Rust [u32; 3] (which #[repr(C)] packs to 12 bytes) describe the same on-wire layout. Without this padding z_near lands at offset 76 in Rust but offset 80 in MSL, swapping z_near / z_far and inverting the volume’s Z mapping.

z_near: f32

Camera near-plane in view units. The fragment sampler maps a scene view-z to a normalised volume w via (z - z_near) / (z_far - z_near) for linear Z.

z_far: f32

Camera far-plane mirror: FogSettings.max_distance. The volume covers [z_near, max_distance] along view-space depth. Beyond max_distance the sampler clamps to the last slice (already fully-integrated).

_pad: [f32; 2]

Padding so the field layout matches the shader-side struct.

Trait Implementations

impl Clone for FogFroxelParams

fn clone(&self) -> FogFroxelParams

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FogFroxelParams

impl Debug for FogFroxelParams

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

Formats the value using the given formatter.

impl NoUninit for FogFroxelParams