DriftEngine

Renderer · function

castingRange

The range a rectangle will actually cast over, or 0 for one that will not.

Explained in Hello world.

function castingRange(light: AreaLightSource | undefined): number
import { castingRange } from '@driftengine/core';

Parameters

ParameterTypeDescription
lightAreaLightSource | undefined

In depth

A declared castsShadow with no shadowRange counts as not casting, because there is no honest far plane to invent for it — see the field. The renderer says so once by name; this function is only the predicate, and it is shared so the layer count and the map assignment cannot answer it differently.