Struct ShadowMap 

pub struct ShadowMap {
    pub width: u32,
    pub height: u32,
    pub depth_buffer: Vec<f32>,
    pub view_projection: Mat4,
    pub near: f32,
    pub far: f32,
}

A single 2D depth buffer for shadow mapping.

Fields

width: u32

Width of the depth buffer in texels.

height: u32

Height of the depth buffer in texels.

depth_buffer: Vec<f32>

Depth values stored as a flat row-major array. 1.0 = far, 0.0 = near.

view_projection: Mat4

View-projection matrix used when rendering to this shadow map.

near: f32

Near plane distance.

far: f32

Far plane distance.

Implementations

impl ShadowMap

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

Create a new shadow map with the given resolution.

pub fn clear(&mut self)

Clear the depth buffer to the far value.

pub fn write_depth(&mut self, x: u32, y: u32, depth: f32)

Write a depth value at the given texel coordinates.

pub fn read_depth(&self, x: u32, y: u32) -> f32

Read the depth at the given texel coordinates.

pub fn sample_bilinear(&self, u: f32, v: f32) -> f32

Sample depth with bilinear filtering at normalized UV coordinates.

pub fn project_point(&self, world_pos: Vec3) -> (f32, f32, f32)

Project a world-space point into shadow map UV + depth.

pub fn is_in_shadow(&self, world_pos: Vec3, bias: f32) -> bool

Test if a world-space point is in shadow (simple depth comparison).

pub fn rasterize_triangle(&mut self, v0: Vec3, v1: Vec3, v2: Vec3)

Rasterize a triangle into the shadow map depth buffer.

pub fn texel_count(&self) -> usize

Get the total number of texels.

pub fn memory_bytes(&self) -> usize

Get memory usage in bytes (approximate).

Trait Implementations

impl Clone for ShadowMap

fn clone(&self) -> ShadowMap

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ShadowMap

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

Formats the value using the given formatter.