Struct CutawayVolume 

pub struct CutawayVolume { /* private fields */ }

CA.4 — a grid’s cutaway volume, precomputed for the footprint rule: the grid’s world→local transform + its materialised XY chunk footprint + the clip plane, hoisted out of the per-point test so one frame can test many points (sprites, particles, lights) cheaply. Build via Grid::cutaway_volume; the one-shot convenience is Grid::cutaway_hides_point. Both renderers hide sprite instances by exactly this volume, so host-side culls (the deck-light pattern) stay in perfect agreement with the render.

Implementations

impl CutawayVolume

pub fn hides_point(&self, world: DVec3) -> bool

Whether the footprint rule hides the world-space point: mapped into the grid’s local voxel frame, it lands inside the XY footprint with z < z_clip (z-down).

pub fn footprint_xy(&self) -> ([f64; 2], [f64; 2])

The materialised XY chunk footprint [lo, hi) in grid-local voxel coords — what the GPU facade forwards to the sprite cull so both backends test the SAME footprint (the scene’s materialised chunks, not the GPU-resident subset).

Trait Implementations

impl Clone for CutawayVolume

fn clone(&self) -> CutawayVolume

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CutawayVolume

impl Debug for CutawayVolume

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

Formats the value using the given formatter.