PKHeX/PKHeX.Core/Legality/Areas/EncounterArea5.cs
Kurt 103aa9aa4b
Revise EncounterArea and EncounterType for clarity (#3228)
EncounterArea now stores a more specific type'd array for encounter slots. Better iteration and less casting, as the nonspecific `Slots` fetch is rarely referenced.

EncounterType renamed to GroundTile to reflect how it actually works in Gen4. Was previously an ambiguous field that was clarified a little; we can describe it a little better now. Keep the GUI the same to not scare the end users.

Change Trash Byte properties to get/set a Span. Trash Byte legality checking easier on the garbage collector?
2021-06-29 20:58:06 -07:00

72 lines
No EOL
2.2 KiB
C#

using System;
using System.Collections.Generic;
namespace PKHeX.Core
{
/// <inheritdoc cref="EncounterArea" />
/// <summary>
/// <see cref="GameVersion.Gen5"/> encounter area
/// </summary>
public sealed record EncounterArea5 : EncounterArea
{
public readonly EncounterSlot5[] Slots;
protected override IReadOnlyList<EncounterSlot> Raw => Slots;
public static EncounterArea5[] GetAreas(byte[][] input, GameVersion game)
{
var result = new EncounterArea5[input.Length];
for (int i = 0; i < input.Length; i++)
result[i] = new EncounterArea5(input[i], game);
return result;
}
private EncounterArea5(byte[] data, GameVersion game) : base(game)
{
Location = data[0] | (data[1] << 8);
Type = (SlotType)data[2];
Slots = ReadSlots(data);
}
private EncounterSlot5[] ReadSlots(byte[] data)
{
const int size = 4;
int count = (data.Length - 4) / size;
var slots = new EncounterSlot5[count];
for (int i = 0; i < slots.Length; i++)
{
int offset = 4 + (size * i);
ushort SpecForm = BitConverter.ToUInt16(data, offset);
int species = SpecForm & 0x3FF;
int form = SpecForm >> 11;
int min = data[offset + 2];
int max = data[offset + 3];
slots[i] = new EncounterSlot5(this, species, form, min, max);
}
return slots;
}
public override IEnumerable<EncounterSlot> GetMatchingSlots(PKM pkm, IReadOnlyList<EvoCriteria> chain)
{
foreach (var slot in Slots)
{
foreach (var evo in chain)
{
if (slot.Species != evo.Species)
continue;
if (!slot.IsLevelWithinRange(pkm.Met_Level))
break;
if (slot.Form != evo.Form && !FormInfo.WildChangeFormAfter.Contains(slot.Species))
break;
yield return slot;
break;
}
}
}
}
}