Function union

union(
    out: box2.Box2,
    boxA: readonly [number, number, number, number],
    boxB: readonly [number, number, number, number],
): box2.Box2
Computes the union of two bounding boxes Returns a Box2 that encompasses both input boxes
Parameters
- out: box2.Box2
  The output Box2
- boxA: readonly [number, number, number, number]
  The first Box2
- boxB: readonly [number, number, number, number]
  The second Box2
Returns box2.Box2
The union Box2
- Defined in shapes/box2.ts:215