/
KnockbackModule.java
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/
KnockbackModule.java
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package slimeknights.tconstruct.library.modifiers.modules.combat;
import lombok.Setter;
import lombok.experimental.Accessors;
import net.minecraft.world.entity.LivingEntity;
import slimeknights.mantle.data.loadable.record.RecordLoadable;
import slimeknights.mantle.data.predicate.IJsonPredicate;
import slimeknights.mantle.data.predicate.entity.LivingEntityPredicate;
import slimeknights.mantle.data.registry.GenericLoaderRegistry.IGenericLoader;
import slimeknights.tconstruct.library.json.math.FormulaLoadable;
import slimeknights.tconstruct.library.json.math.ModifierFormula;
import slimeknights.tconstruct.library.json.math.ModifierFormula.FallbackFormula;
import slimeknights.tconstruct.library.json.predicate.TinkerPredicate;
import slimeknights.tconstruct.library.modifiers.ModifierEntry;
import slimeknights.tconstruct.library.modifiers.ModifierHook;
import slimeknights.tconstruct.library.modifiers.TinkerHooks;
import slimeknights.tconstruct.library.modifiers.hook.combat.MeleeHitModifierHook;
import slimeknights.tconstruct.library.modifiers.modules.ModifierModule;
import slimeknights.tconstruct.library.modifiers.modules.ModifierModuleCondition;
import slimeknights.tconstruct.library.modifiers.modules.ModifierModuleCondition.ConditionalModifierModule;
import slimeknights.tconstruct.library.tools.context.ToolAttackContext;
import slimeknights.tconstruct.library.tools.nbt.IToolStackView;
import java.util.List;
/**
* Module to add knockback to a melee attack
* @param entity Filter on entities to receive knockback
* @param formula Formula to compute the knockback amount
*/
public record KnockbackModule(IJsonPredicate<LivingEntity> entity, ModifierFormula formula, ModifierModuleCondition condition) implements MeleeHitModifierHook, ModifierModule, ConditionalModifierModule {
private static final List<ModifierHook<?>> DEFAULT_HOOKS = List.of(TinkerHooks.MELEE_HIT);
/** Setup for the formula */
private static final FormulaLoadable FORMULA = new FormulaLoadable(FallbackFormula.ADD, "level", "knockback");
/** Loader instance */
public static final RecordLoadable<KnockbackModule> LOADER = RecordLoadable.create(
LivingEntityPredicate.LOADER.defaultField("entity", KnockbackModule::entity),
FORMULA.directField(KnockbackModule::formula),
ModifierModuleCondition.FIELD,
KnockbackModule::new);
@Override
public List<ModifierHook<?>> getDefaultHooks() {
return DEFAULT_HOOKS;
}
@Override
public float beforeMeleeHit(IToolStackView tool, ModifierEntry modifier, ToolAttackContext context, float damage, float baseKnockback, float knockback) {
if (this.condition.matches(tool, modifier)) {
// might want to consider an entity predicate here, this special casing is a bit odd
if (TinkerPredicate.matches(entity, context.getLivingTarget())) {
return formula.apply(formula.computeLevel(tool, modifier), knockback);
}
}
return knockback;
}
@Override
public IGenericLoader<? extends ModifierModule> getLoader() {
return LOADER;
}
/* Builder */
/** Creates a builder instance */
public static Builder builder() {
return new Builder();
}
/** Builder class */
public static class Builder extends ModifierFormula.Builder<Builder,KnockbackModule> {
@Setter
@Accessors(fluent = true)
private IJsonPredicate<LivingEntity> entity = LivingEntityPredicate.ANY;
private Builder() {
super(FORMULA.variables());
}
@Override
protected KnockbackModule build(ModifierFormula formula) {
return new KnockbackModule(entity, formula, condition);
}
}
}