Module shadows 

Shadow mapping subsystem for Proof Engine.

Provides depth-buffer shadow maps, cascaded shadow maps for directional lights, omnidirectional shadow maps for point lights (cubemap layout), shadow atlas packing, PCF filtering, variance shadow maps, configurable bias, distance fade, and shadow caster culling.

Structs

CascadedShadowMap

Shadow mapping for directional lights using cascaded shadow maps. Splits the view frustum into 4 cascades for better shadow resolution distribution.

CasterBounds

AABB for culling shadow casters.

OmniShadowMap

Shadow map for point lights using a 6-face cubemap layout.

PcfKernel

Percentage-closer filtering kernel for soft shadows.

ShadowAtlas

Packs multiple shadow maps into a single atlas texture.

ShadowAtlasRegion

A region within the shadow atlas.

ShadowBias

Configurable shadow bias combining constant, slope-scaled, and normal offset.

ShadowConfig

Global shadow configuration.

ShadowMap

A single 2D depth buffer for shadow mapping.

ShadowStats

Statistics for shadow rendering.

ShadowSystem

Top-level shadow system that orchestrates shadow map allocation and rendering.

VarianceShadowMap

Variance shadow map for soft shadows using statistical analysis. Stores depth and depth-squared moments for Chebyshev’s inequality test.

Enums

CubeFace

The six cube faces.

PcfMode

PCF filter mode selection.

Functions

cull_shadow_casters

Cull shadow casters for a specific light.