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GameRule-Extensions

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Последнее обновление

9 месяцев назад

Версии

1.7.10
Клиент и сервер
Forge
Библиотеки
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GameRule-Extensions

An extension library to allow mod developers to more easily add custom gamerules, with additional datatype support.

Usage (Mod Developers Only)

Adding a new game rule

  1. Add the API jar as a dependency to your project.
  2. Call dev.rndmorris.gameruleexts.api.GameRulesApi.registerGameRule(...) to add a new gamerule for your mod. The api.rules package contains basic implementations for declaring boolean, numerical, and string gamerules.
  3. If necessary, write your own IGameRule implementation.

Reading a game rule

  1. Call dev.rndmorris.gameruleexts.api.GameRulesApi.getGameRules(...).
  2. The returned IGameRules object can be used to retrieve and update gamerules by their name.

Examples

Creating and reading a gamerule


public class CommonProxy {
  // ...
  public void postInit(FMLPostInitializationEvent event) {
    GameRulesApi.registerGameRule(new FloatGameRule("grassCuttingSwordDamage", 90F));
  }
  // ...
}

public class SwordGrassCutting extends ItemSword {
  // ...
  public boolean hitEntity(ItemStack stack, EntityLivingBase target, EntityLivingBase player) {
    final var gameRules = GameRulesApi.getGameRules(player.worldObj);
    target.attackEntityFrom(DamageSource.causePlayerDamage(player).setMagicDamage(), gameRules.getFloat("grassCuttingSwordDamage"));
    return super.hitEntity(stack, target, player);
  }
  // ...
}

Creating a custom gamerule implementation

Here's an example custom gamerule that maps enums to bytes.

```java import java.util.Arrays; import java.util.Collection; import java.util.List; import java.util.stream.Collectors; import net.minecraft.command.ICommandSender; import net.minecraft.nbt.NBTTagCompound; import dev.rndmorris.gameruleexts.api.IGameRule; import dev.rndmorris.gameruleexts.api.IRuleValue; import dev.rndmorris.gameruleexts.api.values.EnumValue; public class ExampleCustomGameRule implements IGameRule { public enum ModDifficulty { EASY, MEDIUM, HARD; public static ModDifficulty fromByte(int val, ModDifficulty defaultValue) { return switch (val) { case 0 -> ModDifficulty.EASY; case 1 -> ModDifficulty.MEDIUM; case 2 -> ModDifficulty.HARD; default -> defaultValue; }; } public byte toByte() { return switch (this) { case EASY -> 0; case MEDIUM -> 1; case HARD -> 2; }; } } private final String name = "modDifficulty"; private final ModDifficulty defaultValue; private List tabCompletionValues; public ExampleCustomGameRule(ModDifficulty defaultValue) { this.defaultValue = defaultValue; } @Override public String getName() { return name; } @Override public IRuleValue getDefaultValue() { return new EnumValue<>(defaultValue, ModDifficulty.class); } @Override public IRuleValue readValueFromNBT(NBTTagCompound tag) { if (!tag.hasKey(name)) { return getDefaultValue(); } final var value = ModDifficulty.fromByte(tag.getByte(name), defaultValue); return new EnumValue<>(value, ModDifficulty.class); } @Override public void writeValueToNBT(NBTTagCompound tag, IRuleValue value) { if (value instanceof EnumValue storedVal && storedVal.getValue() instanceof ModDifficulty enumVal) { tag.setByte(name, enumVal.toByte()); } } @Override public Collection tabCompletionValues(ICommandSender commandSender) { if (tabCompletionValues == null) { tabCompletionValues = Arrays.stream(ModDifficulty.values()) .map(ModDifficulty::toString) .collect(Collectors.toList()); } return tabCompletionValues; } } ```

Credits

  • rndmorris (primary author)
  • The GTNH team, for the project template
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