Struct BspScratch 

pub struct BspScratch<'a> {
    pub face_visframe: &'a mut [u32],
    pub frame: u32,
}

Per-frame scratch buffer used to de-duplicate faces during BSP traversal.

A face shared by multiple leaves (possible with Quake-style marksurface tables) is emitted at most once per frame. The caller owns the backing slice; length must equal BspWorld::faces.len().

Fields

face_visframe: &'a mut [u32]

face_visframe[i] == frame iff face i was already emitted this frame.

frame: u32

Monotonically-increasing frame counter (wraps via wrapping_add).

Implementations

impl<'a> BspScratch<'a>

pub fn new(face_visframe: &'a mut [u32]) -> Self

Create from a caller-owned slice.

The slice should be zero-initialised on first use; subsequent frames require no manual clearing.

pub fn mark_new_frame(&mut self)

Advance to a new frame. Call once at the start of each record_bsp.

pub fn is_marked(&self, face_idx: usize) -> bool

Returns true if face face_idx was already emitted this frame.

pub fn mark(&mut self, face_idx: usize)

Mark face face_idx as emitted for the current frame.