Struct SpriteOccluder 

pub struct SpriteOccluder { /* private fields */ }

XS.2 — a WorldOccluder over sprite volumes, so sprites cast hard shadows onto terrain and each other (and so a sprite-receive query also sees other sprites). Owns the decoded SpriteDense grids; populate with Self::push.

A world-space shadow ray is transformed into each sprite’s local frame and the dense occupancy is DDA-marched. Assumes orthonormal unit instance bases (as the sprite draw does); a non-uniform scale would skew the max_t distance bound. Empty ⇒ casts nothing.

Implementations

impl SpriteOccluder

pub fn new() -> Self

An empty occluder (casts nothing). Add sprite volumes with push.

pub fn is_empty(&self) -> bool

Whether the occluder holds any sprite volumes.

pub fn push( &mut self, dense: Arc<SpriteDense>, pos: [f32; 3], s: [f32; 3], h: [f32; 3], f: [f32; 3], )

Add a decoded sprite volume at a world pose (pos = world pivot; s/h/f = model→world basis columns, the same pose the draw uses). A degenerate (non-invertible) basis is skipped. PF.8 — takes the dense grid by Arc (an occluder rebuild shares the draw path’s cached decodes instead of re-densifying every caster per frame).

Trait Implementations

impl Default for SpriteOccluder

fn default() -> SpriteOccluder

Returns the “default value” for a type.

impl WorldOccluder for SpriteOccluder

fn occluded_world(&self, origin: [f64; 3], dir: [f32; 3], max_t: f32) -> bool

true iff any solid voxel in the scene blocks the segment from world-space origin (f64) in unit direction dir within max_t world voxel units.