Struct EvalCtx 

pub struct EvalCtx<'a> {
    pub tile: TileId,
    pub canvas: CanvasInfo,
    pub assets: &'a dyn AssetLoader,
    pub params: &'a ParamValues,
    pub rng_seed: u64,
    pub influence_pad: u32,
}

Read-only environment a node sees during eval.

Fields

tile: TileId

canvas: CanvasInfo

assets: &'a dyn AssetLoader

params: &'a ParamValues

rng_seed: u64

Deterministic root seed for this render. World-anchored nodes hash this with world coordinates to produce per-feature seeds.

influence_pad: u32

How far outside the canvas this node’s geometry can still reach the rendered tile — see crate::Node::influence_pad. A source may drop geometry that lies further out than this; u32::MAX means the reach is unbounded and nothing may be dropped.

Implementations

impl EvalCtx<'_>

pub fn cull_rect(&self) -> Option<(f64, f64, f64, f64)>

The canvas rectangle, grown by this node’s influence, outside which geometry cannot affect the rendered tile. In padded-canvas pixels; None when the reach is unbounded.

Trait Implementations

impl<'a> Clone for EvalCtx<'a>

fn clone(&self) -> EvalCtx<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Copy for EvalCtx<'a>