public bool CollidesWith(AARect2 rect)
{
AARect2 rect1 = this;
AARect2 rect2 = rect;
return(rect1.TopLeft.X < rect2.TopLeft.X + rect2.Width &&
rect1.TopLeft.X + rect1.Width > rect2.TopLeft.X &&
rect1.TopLeft.Y < rect2.TopLeft.Y + rect2.Height &&
rect1.TopLeft.Y + rect1.Height > rect2.TopLeft.Y);
}
/// <summary>
/// Get all the entities in an enumerable that are colliding with a rect.
/// </summary>
public static HashSet <Entity> HitTest(IEnumerable <Entity> entities, AARect2 rect)
{
HashSet <Entity> results = new HashSet <Entity>();
foreach (var entity in entities)
{
if (entity.BoundingBox.CollidesWith(rect))
{
results.Add(entity);
}
}
return(results);
}