实现丘比特之箭的效果

src/main/java/com/atsuishio/superbwarfare/entity/CupidLove.java

@@ -0,0 +1,14 @@
+package com.atsuishio.superbwarfare.entity;
+
+import net.minecraft.world.entity.npc.Villager;
+
+public interface CupidLove {
+
+    static CupidLove getInstance(Villager villager) {
+        return (CupidLove) villager;
+    }
+
+    void superbwarfare$setCupidLove(boolean love);
+
+    boolean superbwarfare$getCupidLove();
+}

src/main/java/com/atsuishio/superbwarfare/mixins/VillagerMakeLoveMixin.java

@@ -0,0 +1,26 @@
+package com.atsuishio.superbwarfare.mixins;
+
+import com.atsuishio.superbwarfare.entity.CupidLove;
+import net.minecraft.core.BlockPos;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.entity.ai.behavior.VillagerMakeLove;
+import net.minecraft.world.entity.npc.Villager;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+import java.util.Optional;
+
+@Mixin(VillagerMakeLove.class)
+public class VillagerMakeLoveMixin {
+
+    @Inject(method = "takeVacantBed(Lnet/minecraft/server/level/ServerLevel;Lnet/minecraft/world/entity/npc/Villager;)Ljava/util/Optional;",
+            at = @At("HEAD"), cancellable = true)
+    private void takeVacantBed(ServerLevel pLevel, Villager pVillager, CallbackInfoReturnable<Optional<BlockPos>> cir) {
+        CupidLove entity = CupidLove.getInstance(pVillager);
+        if (entity.superbwarfare$getCupidLove()) {
+            cir.setReturnValue(Optional.of(pVillager.getOnPos()));
+        }
+    }
+}

src/main/java/com/atsuishio/superbwarfare/mixins/VillagerMixin.java

@@ -0,0 +1,45 @@
+package com.atsuishio.superbwarfare.mixins;
+
+import com.atsuishio.superbwarfare.entity.CupidLove;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.world.entity.npc.Villager;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(Villager.class)
+public class VillagerMixin implements CupidLove {
+
+    @Unique
+    public boolean superbwarfare$cupidLove;
+
+    @Override
+    public void superbwarfare$setCupidLove(boolean love) {
+        this.superbwarfare$cupidLove = love;
+    }
+
+    @Override
+    public boolean superbwarfare$getCupidLove() {
+        return this.superbwarfare$cupidLove;
+    }
+
+    @Inject(method = "addAdditionalSaveData(Lnet/minecraft/nbt/CompoundTag;)V", at = @At("RETURN"))
+    public void addAdditionalSaveData(CompoundTag pCompound, CallbackInfo ci) {
+        pCompound.putBoolean("SuperbwarfareCupidLove", this.superbwarfare$cupidLove);
+    }
+
+    @Inject(method = "readAdditionalSaveData(Lnet/minecraft/nbt/CompoundTag;)V", at = @At("RETURN"))
+    public void readAdditionalSaveData(CompoundTag pCompound, CallbackInfo ci) {
+        this.superbwarfare$cupidLove = pCompound.getBoolean("SuperbwarfareCupidLove");
+    }
+
+    @Inject(method = "canBreed()Z", at = @At("HEAD"), cancellable = true)
+    public void canBreed(CallbackInfoReturnable<Boolean> cir) {
+        if (this.superbwarfare$cupidLove && ((Villager) (Object) this).getAge() == 0) {
+            cir.setReturnValue(true);
+        }
+    }
+}

src/main/java/com/atsuishio/superbwarfare/perk/functional/CupidArrow.java

@@ -1,13 +1,22 @@
 package com.atsuishio.superbwarfare.perk.functional;
 
+import com.atsuishio.superbwarfare.entity.CupidLove;
 import com.atsuishio.superbwarfare.item.gun.data.GunData;
 import com.atsuishio.superbwarfare.perk.Perk;
 import com.atsuishio.superbwarfare.perk.PerkInstance;
+import com.atsuishio.superbwarfare.tools.ParticleTool;
+import com.google.common.collect.ImmutableList;
+import com.mojang.datafixers.util.Pair;
+import net.minecraft.core.particles.ParticleTypes;
+import net.minecraft.server.level.ServerLevel;
 import net.minecraft.world.damagesource.DamageSource;
 import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.entity.ai.behavior.VillagerMakeLove;
 import net.minecraft.world.entity.animal.Animal;
+import net.minecraft.world.entity.npc.Villager;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.entity.projectile.Projectile;
+import net.minecraft.world.entity.schedule.Activity;
 import org.jetbrains.annotations.Nullable;
 
 public class CupidArrow extends Perk {
@@ -29,6 +38,23 @@ public class CupidArrow extends Perk {
         if (target instanceof Animal animal && animal.canFallInLove()) {
             animal.setInLove(attacker);
         }
+        if (target instanceof Villager villager && !villager.isBaby()) {
+            CupidLove cupidLove = CupidLove.getInstance(villager);
+            cupidLove.superbwarfare$setCupidLove(true);
+
+            if (villager.canBreed()) {
+                villager.getBrain().setActiveActivityIfPossible(Activity.IDLE);
+                villager.getBrain().addActivity(Activity.IDLE, ImmutableList.of(Pair.of(1, new VillagerMakeLove())));
+            }
+        }
+
+        if (target.level() instanceof ServerLevel serverLevel) {
+            double d0 = serverLevel.random.nextGaussian() * 0.02D;
+            double d1 = serverLevel.random.nextGaussian() * 0.02D;
+            double d2 = serverLevel.random.nextGaussian() * 0.02D;
+            ParticleTool.sendParticle(serverLevel, ParticleTypes.HEART, target.getRandomX(1.0D), target.getRandomY() + 0.5D, target.getRandomZ(1.0D),
+                    5, d0, d1, d2, 0.1, false);
+        }
     }
 
     @Override
@@ -40,14 +66,4 @@ public class CupidArrow extends Perk {
     public boolean shouldCancelHurtEvent(float damage, GunData data, PerkInstance instance, LivingEntity target, DamageSource source) {
         return true;
     }
-
-    @Override
-    public double getDisplayDamage(double damage, GunData data, PerkInstance instance) {
-        return 0;
-    }
-
-    @Override
-    public double getExtraDisplayDamage(double damage, GunData data, PerkInstance instance) {
-        return 0;
-    }
 }

src/main/resources/assets/superbwarfare/lang/en_us.json

@@ -345,6 +345,8 @@
   "des.superbwarfare.powerful_attraction": "Experience and items dropped by slain mods will instantly be transferred to your inventory.",
   "item.superbwarfare.intelligent_chip": "Intelligent Chip",
   "des.superbwarfare.intelligent_chip": "Aims at enemies automatically (Do not use this in PVP mode)",
+  "item.superbwarfare.cupid_arrow": "Cupid's Arrow",
+  "des.superbwarfare.cupid_arrow": "Make the target fall in love after being hit. Deals no damage to living entities.",
 
   "item.superbwarfare.kill_clip": "Kill Clip",
   "des.superbwarfare.kill_clip": "Increases the damage of weapon after dealing a final blow.",

src/main/resources/assets/superbwarfare/lang/zh_cn.json

@@ -345,6 +345,8 @@
   "des.superbwarfare.powerful_attraction": "击杀目标后掉落的物品和经验会直接转移到自身",
   "item.superbwarfare.intelligent_chip": "智慧芯片",
   "des.superbwarfare.intelligent_chip": "自动瞄准敌人（请勿在PVP使用此模组）",
+  "item.superbwarfare.cupid_arrow": "丘比特之箭",
+  "des.superbwarfare.cupid_arrow": "命中后会使目标坠入爱河，不会对生物造成伤害",
 
   "item.superbwarfare.kill_clip": "杀戮弹匣",
   "des.superbwarfare.kill_clip": "完成击杀后填装可提升武器伤害",

src/main/resources/mixins.superbwarfare.json

@@ -8,7 +8,9 @@
     "EntityMixin",
     "FishingHookMixin",
     "LivingEntityMixin",
-    "PlayerMixin"
+    "PlayerMixin",
+    "VillagerMakeLoveMixin",
+    "VillagerMixin"
   ],
   "client": [
     "CameraMixin",