17满护甲效果

具体代码

/**
 * @author houyunfei
 */
public class ModArmorItem extends ArmorItem {
    public ModArmorItem(ArmorMaterial material, Type type, Settings settings) {
        super(material, type, settings);
    }

    private static final Map<ArmorMaterial, StatusEffectInstance> MATERIAL_STATUS_EFFECT_INSTANCE_MAP =
            (new ImmutableMap.Builder<ArmorMaterial, StatusEffectInstance>())
                    .put(ModArmorMaterials.RUBY, new StatusEffectInstance(StatusEffects.HASTE, 400, 1,
                            false, false, true)).build();

    /**
     * 这个方法会在玩家每次更新物品栏时调用
     */
    @Override
    public void inventoryTick(ItemStack stack, World world, Entity entity, int slot, boolean selected) {
        if (!world.isClient) {
            if (entity instanceof PlayerEntity player && hasFullSuitOfArmorOn(player)) {
                evaluateArmorEffects(player);
            }
        }
        super.inventoryTick(stack, world, entity, slot, selected);
    }

    /**
     * 评估护甲效果
     */
    private void evaluateArmorEffects(PlayerEntity player) {
        for (Map.Entry<ArmorMaterial, StatusEffectInstance> entry : MATERIAL_STATUS_EFFECT_INSTANCE_MAP.entrySet()) {
            ArmorMaterial mapArmorMaterial = entry.getKey();
            StatusEffectInstance mapStatusEffect = entry.getValue();
            if (hasCorrectArmorOn(mapArmorMaterial, player)) {
                addStatusEffectForMaterial(player, mapArmorMaterial, mapStatusEffect);
            }
        }

    }

    /**
     * 为玩家添加护甲效果
     */
    private void addStatusEffectForMaterial(PlayerEntity player, ArmorMaterial mapArmorMaterial, StatusEffectInstance mapStatusEffect) {
        boolean hasPlayerEffect = player.hasStatusEffect(mapStatusEffect.getEffectType());
        if (hasCorrectArmorOn(mapArmorMaterial, player) && !hasPlayerEffect) {
            player.addStatusEffect(new StatusEffectInstance(mapStatusEffect));
        }
    }

    /**
     * 判断玩家是否穿戴了正确的盔甲
     */
    private boolean hasCorrectArmorOn(ArmorMaterial mapArmorMaterial, PlayerEntity player) {
        for (ItemStack armorStack : player.getInventory().armor) {
            if (!(armorStack.getItem() instanceof ArmorItem)) {
                return false;
            }
        }

        ArmorItem boots = (ArmorItem) player.getInventory().getArmorStack(0).getItem();
        ArmorItem leggings = (ArmorItem) player.getInventory().getArmorStack(1).getItem();
        ArmorItem breastplate = (ArmorItem) player.getInventory().getArmorStack(2).getItem();
        ArmorItem helmet = (ArmorItem) player.getInventory().getArmorStack(3).getItem();

        return boots.getMaterial() == mapArmorMaterial
                && leggings.getMaterial() == mapArmorMaterial
                && breastplate.getMaterial() == mapArmorMaterial
                && helmet.getMaterial() == mapArmorMaterial;
    }

    /**
     * 判断玩家是否有全套盔甲
     */
    private boolean hasFullSuitOfArmorOn(PlayerEntity player) {
        ItemStack boots = player.getInventory().getArmorStack(0);
        ItemStack leggings = player.getInventory().getArmorStack(1);
        ItemStack breastplate = player.getInventory().getArmorStack(2);
        ItemStack helmet = player.getInventory().getArmorStack(3);

        return !helmet.isEmpty() && !breastplate.isEmpty()
                && !leggings.isEmpty() && !boots.isEmpty();
    }
}

ModItems：

public static final Item RUBY_HELMET = registerItem("ruby_helmet",
        new ModArmorItem(ModArmorMaterials.RUBY, ArmorItem.Type.HELMET, new FabricItemSettings()));

效果

当我们穿上了全套的护甲之后，会有一个急迫的效果