shapeBounds

function shapeBounds(shape: ConvexShape, out: Aabb): Aabb

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

Parameters

In depth

radius and sideRadius grow the box differently, and the second one is not sideRadius on every axis. A ball grows a box by its radius along all three; a disc perpendicular to a unit axis a grows it by sideRadius * sqrt(1 - a[i]^2) along axis i — the disc's own extent seen down that axis, which is the full radius across the axis and exactly nothing along it. Using sideRadius on all three instead would bound a lying cylinder as if it were a sphere, which is conservative and therefore not wrong, and would cost the broad phase the difference on every cylinder in the world.