resolveDrawGrouping

function resolveDrawGrouping(material: DrftMaterial | undefined, override?: DrawSurfaceOverride): DrawGrouping

import { resolveDrawGrouping } from '@driftengine/assets';

Parameters

In depth

The defaults are the loader's and are not arbitrary. A missing texture index is -1 rather than 0, because 0 is a real image. Opacity and the two scales default to 1 and the rest to 0, which is the identity that lets a file saying nothing about a property draw the same as one that did not have the property to say.

The override wins over the material for the fields it may carry, because a consumer dressing a surface by name knows more than a default an exporter wrote. A cutout is not among them: it is a fact about the image a material wears, so nothing outside the file has anything to say about it.