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Prevent egg generator from yielding unbreedable species-forms

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The "IsPresentInGame" will likely have to be refactored out as an interface, as future games (BDSP) will likely have partial national dex content
This commit is contained in:
Kurt
2021-09-06 10:48:32 -07:00
parent 4cb525aac1
commit 99231b978e
1 changed files with 16 additions and 5 deletions
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21
PKHeX.Core/Legality/Breeding.cs
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@@ -110,14 +110,23 @@ public static bool CanHatchAsEgg(int species, int form, int generation)
if (FormInfo.IsTotemForm(species, form, generation))
return false;
if (species == (int)Pichu)
return false; // can't get Spiky Ear Pichu eggs
if (species is (int)Sinistea or (int)Polteageist)
return false; // can't get Antique eggs
return true;
return IsBreedableForm(species, form);
}
/// <summary>
/// Some species can have forms that cannot exist as egg (event/special forms). Same idea as <see cref="FormInfo.IsTotemForm(int,int,int)"/>
/// </summary>
/// <returns>True if can be bred.</returns>
private static bool IsBreedableForm(int species, int form) => species switch
{
(int)Pikachu or (int)Eevee => false, // can't get these forms as egg
(int)Pichu => false, // can't get Spiky Ear Pichu eggs
(int)Floette when form == 5 => false, // can't get Eternal Flower from egg
(int)Sinistea or (int)Polteageist => false, // can't get Antique eggs
_ => true,
};
/// <summary>
/// Checks if the <see cref="species"/>-<see cref="form"/> can exist as a hatched egg in the requested <see cref="game"/>.
/// </summary>
@@ -130,6 +139,8 @@ public static bool CanHatchAsEgg(int species, int form, GameVersion game)
// Sanity check form for origin
var pt = GameData.GetPersonal(game);
var entry = pt.GetFormEntry(species, form);
if (entry is PersonalInfoSWSH { IsPresentInGame: false })
return false;
return form < entry.FormCount || (species == (int)Rotom && form <= 5);
}