1.15.2弓新增各种属性问题


你使用的系统：window 64
你用的JDK是: 1.8
你使用的IDE：idea
你使用的IDE版本:2020
Forge版本: 31.2.0
Minecraft版本: 1.15.2
Mapping 文件版本: 20200514-1.15.1

为什么我这么写拿弓射人 那个人不会中毒

package com.tutorial.neutrino.instantiation.items;

import com.tutorial.neutrino.groups.ModGroup;
import net.minecraft.enchantment.EnchantmentHelper;
import net.minecraft.enchantment.Enchantments;
import net.minecraft.entity.LivingEntity;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.entity.projectile.AbstractArrowEntity;
import net.minecraft.item.*;
import net.minecraft.potion.EffectInstance;
import net.minecraft.potion.Effects;
import net.minecraft.stats.Stats;
import net.minecraft.util.SoundCategory;
import net.minecraft.util.SoundEvents;
import net.minecraft.world.World;



public class ObsidianBow extends BowItem {
    private static final EffectInstance _effectInstance = new EffectInstance(Effects.POISON, 10 * 20, 1);

    public ObsidianBow() {
        super(new Properties().group(ModGroup.itemGroup));
    }


    @Override
    public void onPlayerStoppedUsing(ItemStack stack, World worldIn, LivingEntity entityLiving, int timeLeft) {
        if (entityLiving instanceof PlayerEntity) {//判断entityLiving是否为PlayerEntity实体 判断entityLiving是否为玩家
            PlayerEntity playerentity = (PlayerEntity) entityLiving;//向上转型
            //是创造或者游戏难度简单赋值flag为true
            boolean flag = playerentity.abilities.isCreativeMode || EnchantmentHelper.getEnchantmentLevel(Enchantments.INFINITY, stack) > 0;

            ItemStack itemstack = playerentity.findAmmo(stack);//找到stack的弹药赋值为itemstack

            int i = this.getUseDuration(stack) - timeLeft;//获取蓄力了多久赋值i
            i = net.minecraftforge.event.ForgeEventFactory.onArrowLoose(stack, worldIn, playerentity, i, !itemstack.isEmpty() || flag);//不知道
            //如果没有蓄力则跳出方法
            if (i < 0) {
                return;
            }

            //如果有弹药或者在创造模式执行的语句
            if (!itemstack.isEmpty() || flag) {
                if (itemstack.isEmpty()) {
                    itemstack = new ItemStack(Items.ARROW);
                }

                //现在的变量f是箭的伤害
                float f = getArrowVelocity(i);
                //如果箭伤害大于0.1执行语句
                if (!((double) f < 0.1D)) {
                    boolean flag1 = playerentity.abilities.isCreativeMode || (itemstack.getItem() instanceof ArrowItem && ((ArrowItem) itemstack.getItem()).isInfinite(itemstack, stack, playerentity));
                    if (!worldIn.isRemote) {

                        ArrowItem arrowitem = (ArrowItem) (itemstack.getItem() instanceof ArrowItem ? itemstack.getItem() : Items.ARROW);

                        playerentity.addPotionEffect(_effectInstance);
//                        entityLiving.addPotionEffect(_effectInstance);


                        AbstractArrowEntity abstractarrowentity = arrowitem.createArrow(worldIn, itemstack, playerentity);
                        abstractarrowentity = customeArrow(abstractarrowentity);
                        abstractarrowentity.shoot(playerentity, playerentity.rotationPitch, playerentity.rotationYaw, 0.0F, f * 3.0F, 1.0F);


                        if (f == 1.0F) {
                            abstractarrowentity.setIsCritical(true);
                        }

                        int j = EnchantmentHelper.getEnchantmentLevel(Enchantments.POWER, stack);
                        if (j > 0) {
                            abstractarrowentity.setDamage(abstractarrowentity.getDamage() + (double) j * 0.5D + 0.5D);
                        }

                        int k = EnchantmentHelper.getEnchantmentLevel(Enchantments.PUNCH, stack);
                        if (k > 0) {
                            abstractarrowentity.setKnockbackStrength(k);
                        }

                        if (EnchantmentHelper.getEnchantmentLevel(Enchantments.FLAME, stack) > 0) {
                            abstractarrowentity.setFire(100);
                        }

                        stack.damageItem(1, playerentity, (p_220009_1_) -> {
                            p_220009_1_.sendBreakAnimation(playerentity.getActiveHand());
                        });
                        if (flag1 || playerentity.abilities.isCreativeMode && (itemstack.getItem() == Items.SPECTRAL_ARROW || itemstack.getItem() == Items.TIPPED_ARROW)) {
                            abstractarrowentity.pickupStatus = AbstractArrowEntity.PickupStatus.CREATIVE_ONLY;
                        }

                        worldIn.addEntity(abstractarrowentity);
                    }

                    worldIn.playSound((PlayerEntity) null, playerentity.getPosX(), playerentity.getPosY(), playerentity.getPosZ(), SoundEvents.ENTITY_ARROW_SHOOT, SoundCategory.PLAYERS, 1.0F, 1.0F / (random.nextFloat() * 0.4F + 1.2F) + f * 0.5F);
                    if (!flag1 && !playerentity.abilities.isCreativeMode) {
                        itemstack.shrink(1);
                        if (itemstack.isEmpty()) {
                            playerentity.inventory.deleteStack(itemstack);
                        }
                    }

                    playerentity.addStat(Stats.ITEM_USED.get(this));
                }
            }
        }
    }


}

FledgeXu


我估计你只需要继承BowItem然后重写customArrow方法就行了，不需要复制这么多代码。



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不行啊 好像得重写onPlayerStoppedUsing方法


FledgeXu


怎么就不行了？
你在这个函数里判断一下是不是ArrowEntity这个子类，然后调用ArrowEntity下的addEffect不就行了……



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FledgeXu


请你用补充在评论里，论坛支持markdown格式。



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FledgeXu


  1. 请你发代码，不要发截图。
    Markdown 小学生都学得会。
    Markdown 简明教程
  2. 我不知道，你要自己运行，看看出什么bug了。
  3. 不要写一段代码问别人，别人不是人脑解析器。


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package com.tutorial.neutrino.instantiation.items;

import com.tutorial.neutrino.groups.ModGroup;
import net.minecraft.enchantment.EnchantmentHelper;
import net.minecraft.enchantment.Enchantments;
import net.minecraft.entity.LivingEntity;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.entity.projectile.AbstractArrowEntity;
import net.minecraft.entity.projectile.ArrowEntity;
import net.minecraft.item.*;
import net.minecraft.potion.EffectInstance;
import net.minecraft.potion.Effects;
import net.minecraft.stats.Stats;
import net.minecraft.util.SoundCategory;
import net.minecraft.util.SoundEvents;
import net.minecraft.world.World;


/**
 * 黑曜弓
 *
 * @author 李昌瑞
 * @email [email protected]
 * @Date 2020/12/7 14:30
 */
public class ObsidianBow extends BowItem {
    private static final EffectInstance _effectInstance = new EffectInstance(Effects.POISON, 6 * 40, 2);

    public ObsidianBow() {
        super(new Properties().group(ModGroup.itemGroup));
    }


    /**
     * @param stack        弓
     * @param worldIn      这个方法被调用时所在的 World
     * @param entityLiving 使用这个物品的实体（注意，不一定是玩家）
     * @param timeLeft     剩余蓄力时间？ 数值越小蓄力时间越久？
     * @author lichangrui
     * @date 2020/12/8 9:16
     */
    @Override
    public void onPlayerStoppedUsing(ItemStack stack, World worldIn, LivingEntity entityLiving, int timeLeft) {
        if (entityLiving instanceof PlayerEntity) {//判断entityLiving是否为PlayerEntity实体 判断entityLiving是否为玩家
            PlayerEntity playerentity = (PlayerEntity) entityLiving;//向上转型
            //是创造或者游戏难度简单赋值flag为true
            boolean flag = playerentity.abilities.isCreativeMode || EnchantmentHelper.getEnchantmentLevel(Enchantments.INFINITY, stack) > 0;

            ItemStack itemstack = playerentity.findAmmo(stack);//找到stack的弹药赋值为itemstack

            int i = this.getUseDuration(stack) - timeLeft;//获取蓄力了多久赋值i
            i = net.minecraftforge.event.ForgeEventFactory.onArrowLoose(stack, worldIn, playerentity, i, !itemstack.isEmpty() || flag);//不知道
            //如果没有蓄力则跳出方法
            if (i < 0) {
                return;
            }

            //如果有弹药或者在创造模式执行的语句
            if (!itemstack.isEmpty() || flag) {
                if (itemstack.isEmpty()) {
                    itemstack = new ItemStack(Items.ARROW);
                }

                //现在的变量f是箭的伤害
                float f = getArrowVelocity(i);
                //如果箭伤害大于0.1执行语句
                if (!((double) f < 0.1D)) {
                    boolean flag1 = playerentity.abilities.isCreativeMode || (itemstack.getItem() instanceof ArrowItem && ((ArrowItem) itemstack.getItem()).isInfinite(itemstack, stack, playerentity));
                    if (!worldIn.isRemote) {

                        ArrowItem arrowitem = (ArrowItem) (itemstack.getItem() instanceof ArrowItem ? itemstack.getItem() : Items.ARROW);

//                        playerentity.addPotionEffect(_effectInstance);
//                        entityLiving.addPotionEffect(_effectInstance);

                        ArrowEntity arrowEntity = (ArrowEntity) arrowitem.createArrow(worldIn, itemstack, playerentity);
//                        AbstractArrowEntity abstractarrowentity = arrowitem.createArrow(worldIn, itemstack, playerentity);
                        arrowEntity.addEffect(_effectInstance);
//                        ((ArrowEntity) abstractarrowentity).addEffect(_effectInstance);//新增 有时候好使

                        arrowEntity = (ArrowEntity) customeArrow(arrowEntity);
                        arrowEntity.shoot(playerentity, playerentity.rotationPitch, playerentity.rotationYaw, 0.0F, f * 3.0F, 1.0F);


                        if (f == 1.0F) {
                            arrowEntity.setIsCritical(true);
                        }

                        int j = EnchantmentHelper.getEnchantmentLevel(Enchantments.POWER, stack);
                        if (j > 0) {
                            arrowEntity.setDamage(arrowEntity.getDamage() + (double) j * 0.5D + 0.5D);
                        }

                        int k = EnchantmentHelper.getEnchantmentLevel(Enchantments.PUNCH, stack);
                        if (k > 0) {
                            arrowEntity.setKnockbackStrength(k);
                        }

                        if (EnchantmentHelper.getEnchantmentLevel(Enchantments.FLAME, stack) > 0) {
                            arrowEntity.setFire(100);
                        }

                        stack.damageItem(1, playerentity, (p_220009_1_) -> {
                            p_220009_1_.sendBreakAnimation(playerentity.getActiveHand());
                        });
                        if (flag1 || playerentity.abilities.isCreativeMode && (itemstack.getItem() == Items.SPECTRAL_ARROW || itemstack.getItem() == Items.TIPPED_ARROW)) {
                            arrowEntity.pickupStatus = AbstractArrowEntity.PickupStatus.CREATIVE_ONLY;
                        }

                        worldIn.addEntity(arrowEntity);
                    }

                    worldIn.playSound((PlayerEntity) null, playerentity.getPosX(), playerentity.getPosY(), playerentity.getPosZ(), SoundEvents.ENTITY_ARROW_SHOOT, SoundCategory.PLAYERS, 1.0F, 1.0F / (random.nextFloat() * 0.4F + 1.2F) + f * 0.5F);
                    if (!flag1 && !playerentity.abilities.isCreativeMode) {
                        itemstack.shrink(1);
                        if (itemstack.isEmpty()) {
                            playerentity.inventory.deleteStack(itemstack);
                        }
                    }

                    playerentity.addStat(Stats.ITEM_USED.get(this));
                }
            }
        }
    }

//    @Override
//    public AbstractArrowEntity customeArrow(AbstractArrowEntity arrow) {
//        ((ArrowEntity) arrow).addEffect(_effectInstance);
//        return arrow;
//    }

}

现在呢 我这样写刚开始射蘑菇牛一次或者几次可以中毒 然后之后就一直不会中毒了 求助


FledgeXu


我说过了你没有必要重写这个方法。
我写了一个测试了一下，运作非常正常

public class TestBow extends BowItem {
    public TestBow(Properties builder) {
        super(builder);
    }

    @Override
    public AbstractArrowEntity customArrow(AbstractArrowEntity arrow) {
        if (arrow instanceof ArrowEntity) {
            ((ArrowEntity) arrow).addEffect(new EffectInstance(Effects.POISON, 3000, 10));
        }
        return super.customArrow(arrow);
    }
}


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FledgeXu


请不要用铁的这种词。



那你知道怎么添加 爆炸和被雷劈的效果吗
我这样写没有雷劈的效果 而且DamageSource里没有爆炸的效果呀

package com.tutorial.neutrino.instantiation.items;

import com.tutorial.neutrino.groups.ModGroup;
import net.minecraft.enchantment.EnchantmentHelper;
import net.minecraft.enchantment.Enchantments;
import net.minecraft.entity.LivingEntity;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.entity.projectile.AbstractArrowEntity;
import net.minecraft.entity.projectile.ArrowEntity;
import net.minecraft.item.*;
import net.minecraft.potion.EffectInstance;
import net.minecraft.potion.Effects;
import net.minecraft.stats.Stats;
import net.minecraft.util.SoundCategory;
import net.minecraft.util.SoundEvents;
import net.minecraft.world.World;


/**
 * 黑曜弓
 *
 * @author 李昌瑞
 * @email [email protected]
 * @Date 2020/12/7 14:30
 */
public class ObsidianBow extends BowItem {
    public ObsidianBow() {
        super(new Properties().group(ModGroup.itemGroup));
    }

    @Override
    public AbstractArrowEntity customeArrow(AbstractArrowEntity arrow) {
        if (arrow instanceof ArrowEntity) {
            ((ArrowEntity) arrow).addEffect(new EffectInstance(Effects.POISON, 6 * 20, 6));
        }
//        arrow.attackEntityFrom(DamageSource.LIGHTNING_BOLT,2.0F);
        return super.customeArrow(arrow);
    }


求回复…


FledgeXu


这是另外的问题，一个帖子是一个问题。