Struct GeomSig 

pub struct GeomSig { /* private fields */ }

Identifies the geometry a draw-object BLAS traces, on the shared vertex/index buffers. Two draw objects with the same signature trace identical geometry, so a topology refresh can reuse the existing BLAS instead of building a new one. A streamed mesh is placed wherever the sub-allocator has room, so a slot that streams out and back in generally returns on a different slice; the signature moves with it and the BLAS is rebuilt rather than wrongly reused. base_vertex + index_offset + index_count are exactly the inputs the per-backend geometry descriptor uses; vertex_offset is carried too so a static draw (whose base_vertex is 0) still distinguishes distinct vertex regions.

The slice location alone is not enough: an asset hot-reload rewrites a slot’s bytes in place at unchanged offsets, which leaves every field above equal. generation (the draw object’s geometry_generation) moves on each such rewrite so the stale BLAS is rebuilt instead of reused.

Implementations

impl GeomSig

pub fn of(obj: &DrawObject) -> Self

The topology class a draw record falls into.

Trait Implementations

impl Clone for GeomSig

fn clone(&self) -> GeomSig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for GeomSig

impl Debug for GeomSig

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

Formats the value using the given formatter.

impl Eq for GeomSig

impl PartialEq for GeomSig

fn eq(&self, other: &GeomSig) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for GeomSig