isContaining() utility function might be a nice addition

[michael-dean-haynie]

Below is an example of my own utility I ended up making which might be useful to others.
Perhaps the exact behavior I needed is not important, but the isOverlapping() helper wouldn't work for me.

I did JUST notice the isIntersecting() helper though ... maybe that's good enough. I could just specify the same position for the start and end parameters...

/**
 * Checks if a position is inside a rect.
 * Important that it doesn't generously accept points on the far edges.
 * This is so that engine objects can belong to exactly 1 sector, even though they may overlap multiple.
 * So points will match on the lower end, but not the upper end.
 */
export function posInRect(pos: Vector2, rectPos: Vector2, rectSize: Vector2) {
	const bottomLeft = rectPos.subtract(rectSize.scale(0.5));
	const topRight = rectPos.add(rectSize.scale(0.5));
	if (
		pos.x >= bottomLeft.x &&
		pos.y >= bottomLeft.y &&
		pos.x < topRight.x &&
		pos.y < topRight.y
	) {
		return true;
	}

	return false;
}