Struct CullParams 

#[repr(C)]
pub struct CullParams {
    pub planes: [[f32; 4]; 6],
    pub cam_pos: [f32; 3],
    pub object_count: u32,
    pub prev_view_proj: [[f32; 4]; 4],
    pub hiz_size: [f32; 2],
    pub hiz_mip_count: u32,
    pub hiz_enabled: u32,
    pub bucket_count: u32,
    pub bucket_stride: u32,
    pub _pad: [u32; 2],
}

The GPU-cull CullParams cbuffer (b0, 208 bytes): six already-normalised frustum planes, the camera position sharing its row with the object count, the previous frame’s view-projection, the Hi-Z metadata (dims, mip count, enable flag), then the shader-bucket routing. DirectX fuses the cull + Hi-Z uniforms into one cbuffer.

Fields

planes: [[f32; 4]; 6]

Frustum planes, each (normal.xyz, d).

cam_pos: [f32; 3]

World-space camera position.

object_count: u32

Draw records the kernel iterates.

prev_view_proj: [[f32; 4]; 4]

The previous frame’s view-projection, for velocity and Hi-Z reprojection.

hiz_size: [f32; 2]

Hi-Z pyramid base size in pixels.

hiz_mip_count: u32

Mip levels in the Hi-Z pyramid.

hiz_enabled: u32

Non-zero when the Hi-Z occlusion test runs.

bucket_count: u32

Shader-bucket command regions in the indirect buffer. The kernel writes every record’s slot in all bucket_count regions (a draw in the record’s own bucket, a no-op everywhere else); region b starts at command b * bucket_stride. bucket_count = 1 degenerates to a single region.

bucket_stride: u32

u32 slots one bucket occupies in the output list.

_pad: [u32; 2]

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

Trait Implementations

impl Clone for CullParams

fn clone(&self) -> CullParams

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CullParams