TheSadRogue.Primitives 1.6.0-rc1

- Added spatial maps, which are an efficient way to represent items on a grid, particularly when the items are sparse relative to the number of cells. - Added interfaces for common concepts found in data structures/objects that reside on 2D grids - IHasID: A structure that has a unique or pseudo-unique integer identifier - IHasLayer: A structure that has a z-index (aka layer) on which it resides - IPositionable: A structure that has a 2D position, and fires events when that position changes. - Added `LayerMasker` which is a helper class for creating 32-bit integer-based masks of specific z-indices/rendering layers. - Added more custom iterators, and changed iterator paradigm in library to allow for increased performance - Changes apply to classes/functions including: Rectangle.Positions(), Rectangle.PerimeterPositions(), all line and shape algorithms, LayerMasker functions, BisectionResult, and Area - Custom enumerables now implement `IEnumerator` and `IEnumerable` directly; therefore their `ToEnumerable()` function is obsolete. You should simply remove the call to that function since the same behavior is obtained without it. - This also applies to Area; FastEnumerator()` is now deprecated as its behavior is achieved by default when iterating over IReadOnlyArea implementations. - Iteration over a value known to be of type `Area` is now faster - Added a ListEnumerator type which is functionally identical to C#'s built-in enumerator for lists, but also implements IEnumerable so supports being returned from functions like the primitives library typically does for functions such as Rectangle.Positions() - Added `Box` shape algorithm - Modified default hashing algorithm for Point to one with better performance - New hashing algorithm collides less and remains viable over a very large range of points; see Point.GetHashCode() documentation for details - Optimized spatial maps compared to the GoRogue implementation - The result of MultiSpatialMap.GetItemsAt is now significantly faster to iterate over if the value is of known type MultiSpatialMap - Added auto-syncing variants of spatial maps - Anything implementing IPositionable can be used with the auto-syncing variants - With these variants, if you change the Position field of an object within the spatial map, OR if you call a movement function on the spatial map, both the spatial map and the Position field update and remain in sync - Modified SpatialMap API slightly - Move functions (and variants) now tolerate the current position and target position being the same without failing - Fixed bugs in LayeredSpatialMap - LayeredSpatialMap.TryMoveAll guarantees that objects aren't moved at all if one or more can't be moved - LayeredSpatialMap.GetLayersInMask now returns the correct layers