import { type AABB, type Hit, rayVsAABB, type Vec } from "./given.ts";

/**
 * A moving box `a` (velocity `v` over this frame) vs a static box `b`.
 *
 * Inflate `b` by `a`'s size (Minkowski sum), collapse `a` to its corner point,
 * then reuse rayVsAABB. Return its Hit, or null for no collision this frame.
 */
export function sweptAABB(a: AABB, v: Vec, b: AABB): Hit | null {
	const inflated: AABB = {
		x: b.x - a.w,
		y: b.y - a.h,
		w: b.w + a.w,
		h: b.h + a.h,
	};

	const point: Vec = { x: a.x, y: a.y };

	return rayVsAABB(point, v, inflated);
}