BODY_SENSOR

A sensor reports overlap and resolves none of it.

Explained in Your first game, Rigid bodies.

const BODY_SENSOR = 2

import { BODY_SENSOR } from '@driftengine/physics';

In depth

Narrowphase still runs — an overlap that is never computed cannot be reported — and the solver is what skips it. What this costs is a sensor being as dear as a solid body in the broadphase and narrowphase, which is where most of the cost is anyway.