Struct ShadowAtlas 

pub struct ShadowAtlas {
    pub width: u32,
    pub height: u32,
    pub depth_buffer: Vec<f32>,
    pub regions: Vec<ShadowAtlasRegion>,
    /* private fields */
}

Packs multiple shadow maps into a single atlas texture.

Fields

width: u32

Total atlas width in texels.

height: u32

Total atlas height in texels.

depth_buffer: Vec<f32>

The atlas depth buffer.

regions: Vec<ShadowAtlasRegion>

Allocated regions.

Implementations

impl ShadowAtlas

pub fn new(width: u32, height: u32) -> Self

pub fn clear(&mut self)

Clear the entire atlas depth buffer.

pub fn reset_allocations(&mut self)

Reset all allocations (but keep the depth buffer).

pub fn allocate( &mut self, width: u32, height: u32, light_id: LightId, ) -> Option<usize>

Allocate a region of the given size. Returns the region index or None if full.

pub fn write_depth_in_region( &mut self, region_idx: usize, local_x: u32, local_y: u32, depth: f32, )

Write depth at a position within a region.

pub fn read_depth_in_region( &self, region_idx: usize, local_x: u32, local_y: u32, ) -> f32

Read depth at a position within a region.

pub fn sample_region_bilinear(&self, region_idx: usize, u: f32, v: f32) -> f32

Sample with bilinear filtering within a region at normalized UV.

pub fn region_count(&self) -> usize

Get the number of allocated regions.

pub fn memory_bytes(&self) -> usize

Get memory usage in bytes.

pub fn utilization(&self) -> f32

Get utilization as a fraction (0..1).

Trait Implementations

impl Clone for ShadowAtlas

fn clone(&self) -> ShadowAtlas

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ShadowAtlas

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

Formats the value using the given formatter.