mirror of
https://github.com/kwsch/PKHeX
synced 2024-11-23 20:43:07 +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
47 lines
1.6 KiB
C#
47 lines
1.6 KiB
C#
using System;
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using System.Collections.Generic;
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using static System.Buffers.Binary.BinaryPrimitives;
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namespace PKHeX.Core;
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/// <summary>
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/// Generation 6 Evolution Branch Entries
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/// </summary>
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public static class EvolutionSet6
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{
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// 6, 8, 16, 17, 18, 19, 20, 21, 22, 29
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internal static bool IsMethodWithArg(byte method) => (0b100000011111110000000101000000 & (1 << method)) != 0;
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private const int SIZE = 6;
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private static EvolutionMethod[] GetMethods(ReadOnlySpan<byte> data)
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{
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var evos = new EvolutionMethod[data.Length / SIZE];
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for (int i = 0; i < data.Length; i += SIZE)
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{
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var entry = data.Slice(i, SIZE);
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evos[i/SIZE] = GetMethod(entry);
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}
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return evos;
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}
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private static EvolutionMethod GetMethod(ReadOnlySpan<byte> entry)
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{
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var method = entry[0];
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var arg = ReadUInt16LittleEndian(entry[2..]);
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var species = ReadUInt16LittleEndian(entry[4..]);
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// Argument is used by both Level argument and Item/Move/etc. Clear if appropriate.
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var lvl = IsMethodWithArg(method) ? 0 : arg;
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var type = (EvolutionType)method;
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var lvlup = type.IsLevelUpRequired() ? (byte)1 : (byte)0;
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return new EvolutionMethod(type, species, Argument: arg, Level: (byte)lvl, LevelUp: lvlup);
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}
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public static IReadOnlyList<EvolutionMethod[]> GetArray(BinLinkerAccessor data)
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{
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var evos = new EvolutionMethod[data.Length][];
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for (int i = 0; i < evos.Length; i++)
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evos[i] = GetMethods(data[i]);
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return evos;
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}
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}
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