Struct GpuLight 

#[repr(C)]
pub struct GpuLight {
    pub position: [f32; 3],
    pub range: f32,
    pub color: [f32; 3],
    pub intensity: f32,
    pub direction: [f32; 3],
    pub kind: u32,
    pub cos_inner: f32,
    pub cos_outer: f32,
    pub shadow_index: i32,
    pub data_index: i32,
}

One local light in the per-scene storage buffer the forward pass iterates (bound at Metal fragment buffer(8)). 64 bytes = four 16-byte lanes, so every packed_float3 sits inside one lane with no GPU alignment promotion. Must match the GpuLight struct in the single-source shaders.

Fields

position: [f32; 3]

World-space position (point / spot).

range: f32

Maximum reach in metres; attenuation reaches zero at this distance.

color: [f32; 3]

Linear RGB light colour.

intensity: f32

Radiance scale.

direction: [f32; 3]

Unit vector the light points along (spot / area). Zero for a point light.

kind: u32

LIGHT_KIND_* discriminant.

cos_inner: f32

Spot cone: cosine of the inner (full-bright) and outer (cutoff) half-angles. Both zero for a point light; the shader gates the cone term on kind.

cos_outer: f32

Cosine of the spot cone’s outer (cutoff) half-angle.

shadow_index: i32

Index into the spot shadow atlas, or -1 when the light casts no shadow.

data_index: i32

Index into the AreaLightData table for an area light, or -1 for a point / spot light. A rect needs two edge vectors that do not fit in the spare fields here, so the extra data lives in a parallel table (the same shape shadow_index uses for the spot shadow slices).

Implementations

impl GpuLight

pub const ZERO: GpuLight

An all-zero light, used to fill unused slots.

Trait Implementations

impl Clone for GpuLight

fn clone(&self) -> GpuLight

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for GpuLight

impl NoUninit for GpuLight