mirror of
https://github.com/kwsch/PKHeX
synced 2024-12-23 19:03:11 +00:00
9166d0eb64
Rewrites a good amount of legality APIs pertaining to: * Legal moves that can be learned * Evolution chains & cross-generation paths * Memory validation with forgotten moves In generation 8, there are 3 separate contexts an entity can exist in: SW/SH, BD/SP, and LA. Not every entity can cross between them, and not every entity from generation 7 can exist in generation 8 (Gogoat, etc). By creating class models representing the restrictions to cross each boundary, we are able to better track and validate data. The old implementation of validating moves was greedy: it would iterate for all generations and evolutions, and build a full list of every move that can be learned, storing it on the heap. Now, we check one game group at a time to see if the entity can learn a move that hasn't yet been validated. End result is an algorithm that requires 0 allocation, and a smaller/quicker search space. The old implementation of storing move parses was inefficient; for each move that was parsed, a new object is created and adjusted depending on the parse. Now, move parse results are `struct` and store the move parse contiguously in memory. End result is faster parsing and 0 memory allocation. * `PersonalTable` objects have been improved with new API methods to check if a species+form can exist in the game. * `IEncounterTemplate` objects have been improved to indicate the `EntityContext` they originate in (similar to `Generation`). * Some APIs have been extended to accept `Span<T>` instead of Array/IEnumerable
44 lines
1.3 KiB
C#
44 lines
1.3 KiB
C#
using System.Collections.Generic;
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using System.Diagnostics;
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namespace PKHeX.Core;
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/// <summary>
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/// Object storing a reversal path for evolution nodes.
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/// </summary>
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public class EvolutionReverseLookup : IEvolutionLookup
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{
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private readonly EvolutionNode[] Nodes;
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private readonly int MaxSpecies;
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private readonly Dictionary<int, int> KeyLookup;
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public EvolutionReverseLookup(IEnumerable<(int Key, EvolutionLink Value)> links, int maxSpecies)
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{
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MaxSpecies = maxSpecies;
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KeyLookup = new Dictionary<int, int>(maxSpecies);
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var nodes = new EvolutionNode[maxSpecies * 2];
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int ctr = maxSpecies + 1;
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foreach (var (key, value) in links)
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{
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var index = key <= MaxSpecies ? key : KeyLookup.TryGetValue(key, out var x) ? x : KeyLookup[key] = ctr++;
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ref var node = ref nodes[index];
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node.Add(value);
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}
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Nodes = nodes;
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Debug.Assert(KeyLookup.Count < maxSpecies);
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}
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private int GetIndex(int key)
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{
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if (key <= MaxSpecies)
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return key;
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return KeyLookup.TryGetValue(key, out var index) ? index : 0;
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}
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public ref EvolutionNode this[int key] => ref Nodes[GetIndex(key)];
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}
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public interface IEvolutionLookup
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{
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ref EvolutionNode this[int key] { get; }
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}
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