/// <summary>
/// Returns a larger Rect2d that contains this Rect2d and `b`.
/// </summary>
/// <param name="b">The other Rect2d.</param>
/// <returns>The merged Rect2d.</returns>
public Rect2d Merge(Rect2d b)
{
Rect2d newRect;
newRect._position.x = Mathd.Min(b._position.x, _position.x);
newRect._position.y = Mathd.Min(b._position.y, _position.y);
newRect._size.x = Mathd.Max(b._position.x + b._size.x, _position.x + _size.x);
newRect._size.y = Mathd.Max(b._position.y + b._size.y, _position.y + _size.y);
newRect._size -= newRect._position; // Make relative again
return(newRect);
}
/// <summary>
/// Returns the intersection of this Rect2d and `b`.
/// If the rectangles do not intersect, an empty Rect2d is returned.
/// </summary>
/// <param name="b">The other Rect2d.</param>
/// <returns>The intersection of this Rect2d and `b`, or an empty Rect2d if they do not intersect.</returns>
public Rect2d Clip(Rect2d b)
{
var newRect = b;
if (!Intersects(newRect))
{
return(new Rect2d());
}
newRect._position.x = Mathd.Max(b._position.x, _position.x);
newRect._position.y = Mathd.Max(b._position.y, _position.y);
Vector2d bEnd = b._position + b._size;
Vector2d end = _position + _size;
newRect._size.x = Mathd.Min(bEnd.x, end.x) - newRect._position.x;
newRect._size.y = Mathd.Min(bEnd.y, end.y) - newRect._position.y;
return(newRect);
}