| | | 1 | | //======================================================================= |
| | | 2 | | // NavigationMediumSlots.cs |
| | | 3 | | //======================================================================= |
| | | 4 | | // MIT License, Copyright (c) 2024-present David Oravsky (mrdav30) |
| | | 5 | | // See LICENSE file in the project root for full license information. |
| | | 6 | | //======================================================================= |
| | | 7 | | |
| | | 8 | | namespace Trailblazer.Pathing; |
| | | 9 | | |
| | | 10 | | /// <summary>Stores at most one value for each exact known traversal medium.</summary> |
| | | 11 | | internal readonly struct NavigationMediumSlots<T> |
| | | 12 | | { |
| | | 13 | | private readonly T _solid; |
| | | 14 | | private readonly T _gas; |
| | | 15 | | private readonly T _liquid; |
| | | 16 | | private readonly byte _mask; |
| | | 17 | | |
| | | 18 | | private NavigationMediumSlots(T solid, T gas, T liquid, byte mask) |
| | | 19 | | { |
| | 72160 | 20 | | _solid = solid; |
| | 72160 | 21 | | _gas = gas; |
| | 72160 | 22 | | _liquid = liquid; |
| | 72160 | 23 | | _mask = mask; |
| | 72160 | 24 | | } |
| | | 25 | | |
| | | 26 | | internal bool TryGet(TraversalMedium medium, out T value) |
| | | 27 | | { |
| | 6871234 | 28 | | byte bit = GetBit(medium); |
| | 6871234 | 29 | | if ((_mask & bit) == 0) |
| | | 30 | | { |
| | 2 | 31 | | value = default!; |
| | 2 | 32 | | return false; |
| | | 33 | | } |
| | 6871232 | 34 | | value = medium == TraversalMedium.Solid |
| | 6871232 | 35 | | ? _solid |
| | 6871232 | 36 | | : medium == TraversalMedium.Gas |
| | 6871232 | 37 | | ? _gas |
| | 6871232 | 38 | | : _liquid; |
| | 6871232 | 39 | | return true; |
| | | 40 | | } |
| | | 41 | | |
| | | 42 | | internal NavigationMediumSlots<T> Set(TraversalMedium medium, T value) |
| | | 43 | | { |
| | 72160 | 44 | | byte bit = GetBit(medium); |
| | 72160 | 45 | | return medium == TraversalMedium.Solid |
| | 72160 | 46 | | ? new NavigationMediumSlots<T>(value, _gas, _liquid, (byte)(_mask | bit)) |
| | 72160 | 47 | | : medium == TraversalMedium.Gas |
| | 72160 | 48 | | ? new NavigationMediumSlots<T>(_solid, value, _liquid, (byte)(_mask | bit)) |
| | 72160 | 49 | | : new NavigationMediumSlots<T>(_solid, _gas, value, (byte)(_mask | bit)); |
| | | 50 | | } |
| | | 51 | | |
| | | 52 | | internal static byte GetBit(TraversalMedium medium) |
| | | 53 | | { |
| | | 54 | | System.Diagnostics.Debug.Assert(NavigationCell.IsKnownMedium(medium)); |
| | 7000632 | 55 | | return (byte)(1 << ((int)medium - (int)TraversalMedium.Solid)); |
| | | 56 | | } |
| | | 57 | | } |