package net.minecraft.world.entity.monster; import net.minecraft.core.BlockPos; import net.minecraft.core.Holder; import net.minecraft.network.syncher.EntityDataAccessor; import net.minecraft.network.syncher.EntityDataSerializers; import net.minecraft.network.syncher.SynchedEntityData; import net.minecraft.network.syncher.SynchedEntityData.Builder; import net.minecraft.sounds.SoundEvent; import net.minecraft.sounds.SoundEvents; import net.minecraft.util.RandomSource; import net.minecraft.world.Difficulty; import net.minecraft.world.DifficultyInstance; import net.minecraft.world.damagesource.DamageSource; import net.minecraft.world.effect.MobEffect; import net.minecraft.world.effect.MobEffectInstance; import net.minecraft.world.effect.MobEffects; import net.minecraft.world.entity.Entity; import net.minecraft.world.entity.EntitySpawnReason; import net.minecraft.world.entity.EntityType; import net.minecraft.world.entity.LivingEntity; import net.minecraft.world.entity.SpawnGroupData; import net.minecraft.world.entity.ai.attributes.Attributes; import net.minecraft.world.entity.ai.goal.AvoidEntityGoal; import net.minecraft.world.entity.ai.goal.FloatGoal; import net.minecraft.world.entity.ai.goal.LeapAtTargetGoal; import net.minecraft.world.entity.ai.goal.LookAtPlayerGoal; import net.minecraft.world.entity.ai.goal.MeleeAttackGoal; import net.minecraft.world.entity.ai.goal.RandomLookAroundGoal; import net.minecraft.world.entity.ai.goal.WaterAvoidingRandomStrollGoal; import net.minecraft.world.entity.ai.goal.target.HurtByTargetGoal; import net.minecraft.world.entity.ai.goal.target.NearestAttackableTargetGoal; import net.minecraft.world.entity.ai.navigation.PathNavigation; import net.minecraft.world.entity.ai.navigation.WallClimberNavigation; import net.minecraft.world.entity.animal.IronGolem; import net.minecraft.world.entity.animal.armadillo.Armadillo; import net.minecraft.world.entity.player.Player; import net.minecraft.world.level.Level; import net.minecraft.world.level.ServerLevelAccessor; import net.minecraft.world.level.block.Blocks; import net.minecraft.world.level.block.state.BlockState; import net.minecraft.world.phys.Vec3; import org.jetbrains.annotations.Nullable; public class Spider extends Monster { private static final EntityDataAccessor DATA_FLAGS_ID = SynchedEntityData.defineId(Spider.class, EntityDataSerializers.BYTE); private static final float SPIDER_SPECIAL_EFFECT_CHANCE = 0.1F; public Spider(EntityType entityType, Level level) { super(entityType, level); } @Override protected void registerGoals() { this.goalSelector.addGoal(1, new FloatGoal(this)); this.goalSelector.addGoal(2, new AvoidEntityGoal(this, Armadillo.class, 6.0F, 1.0, 1.2, livingEntity -> !((Armadillo)livingEntity).isScared())); this.goalSelector.addGoal(3, new LeapAtTargetGoal(this, 0.4F)); this.goalSelector.addGoal(4, new Spider.SpiderAttackGoal(this)); this.goalSelector.addGoal(5, new WaterAvoidingRandomStrollGoal(this, 0.8)); this.goalSelector.addGoal(6, new LookAtPlayerGoal(this, Player.class, 8.0F)); this.goalSelector.addGoal(6, new RandomLookAroundGoal(this)); this.targetSelector.addGoal(1, new HurtByTargetGoal(this)); this.targetSelector.addGoal(2, new Spider.SpiderTargetGoal(this, Player.class)); this.targetSelector.addGoal(3, new Spider.SpiderTargetGoal(this, IronGolem.class)); } @Override protected PathNavigation createNavigation(Level level) { return new WallClimberNavigation(this, level); } @Override protected void defineSynchedData(Builder builder) { super.defineSynchedData(builder); builder.define(DATA_FLAGS_ID, (byte)0); } @Override public void tick() { super.tick(); if (!this.level().isClientSide) { this.setClimbing(this.horizontalCollision); } } public static net.minecraft.world.entity.ai.attributes.AttributeSupplier.Builder createAttributes() { return Monster.createMonsterAttributes().add(Attributes.MAX_HEALTH, 16.0).add(Attributes.MOVEMENT_SPEED, 0.3F); } @Override protected SoundEvent getAmbientSound() { return SoundEvents.SPIDER_AMBIENT; } @Override protected SoundEvent getHurtSound(DamageSource damageSource) { return SoundEvents.SPIDER_HURT; } @Override protected SoundEvent getDeathSound() { return SoundEvents.SPIDER_DEATH; } @Override protected void playStepSound(BlockPos pos, BlockState state) { this.playSound(SoundEvents.SPIDER_STEP, 0.15F, 1.0F); } @Override public boolean onClimbable() { return this.isClimbing(); } @Override public void makeStuckInBlock(BlockState state, Vec3 motionMultiplier) { if (!state.is(Blocks.COBWEB)) { super.makeStuckInBlock(state, motionMultiplier); } } @Override public boolean canBeAffected(MobEffectInstance effectInstance) { return effectInstance.is(MobEffects.POISON) ? false : super.canBeAffected(effectInstance); } /** * Returns {@code true} if the WatchableObject (Byte) is 0x01 otherwise returns {@code false}. The WatchableObject is updated using setBesideClimbableBlock. */ public boolean isClimbing() { return (this.entityData.get(DATA_FLAGS_ID) & 1) != 0; } /** * Updates the WatchableObject (Byte) created in entityInit(), setting it to 0x01 if par1 is true or 0x00 if it is false. */ public void setClimbing(boolean climbing) { byte b = this.entityData.get(DATA_FLAGS_ID); if (climbing) { b = (byte)(b | 1); } else { b = (byte)(b & -2); } this.entityData.set(DATA_FLAGS_ID, b); } @Nullable @Override public SpawnGroupData finalizeSpawn( ServerLevelAccessor level, DifficultyInstance difficulty, EntitySpawnReason spawnReason, @Nullable SpawnGroupData spawnGroupData ) { spawnGroupData = super.finalizeSpawn(level, difficulty, spawnReason, spawnGroupData); RandomSource randomSource = level.getRandom(); if (randomSource.nextInt(100) == 0) { Skeleton skeleton = EntityType.SKELETON.create(this.level(), EntitySpawnReason.JOCKEY); if (skeleton != null) { skeleton.snapTo(this.getX(), this.getY(), this.getZ(), this.getYRot(), 0.0F); skeleton.finalizeSpawn(level, difficulty, spawnReason, null); skeleton.startRiding(this); } } if (spawnGroupData == null) { spawnGroupData = new Spider.SpiderEffectsGroupData(); if (level.getDifficulty() == Difficulty.HARD && randomSource.nextFloat() < 0.1F * difficulty.getSpecialMultiplier()) { ((Spider.SpiderEffectsGroupData)spawnGroupData).setRandomEffect(randomSource); } } if (spawnGroupData instanceof Spider.SpiderEffectsGroupData spiderEffectsGroupData) { Holder holder = spiderEffectsGroupData.effect; if (holder != null) { this.addEffect(new MobEffectInstance(holder, -1)); } } return spawnGroupData; } @Override public Vec3 getVehicleAttachmentPoint(Entity entity) { return entity.getBbWidth() <= this.getBbWidth() ? new Vec3(0.0, 0.3125 * this.getScale(), 0.0) : super.getVehicleAttachmentPoint(entity); } static class SpiderAttackGoal extends MeleeAttackGoal { public SpiderAttackGoal(Spider spider) { super(spider, 1.0, true); } @Override public boolean canUse() { return super.canUse() && !this.mob.isVehicle(); } @Override public boolean canContinueToUse() { float f = this.mob.getLightLevelDependentMagicValue(); if (f >= 0.5F && this.mob.getRandom().nextInt(100) == 0) { this.mob.setTarget(null); return false; } else { return super.canContinueToUse(); } } } public static class SpiderEffectsGroupData implements SpawnGroupData { @Nullable public Holder effect; public void setRandomEffect(RandomSource random) { int i = random.nextInt(5); if (i <= 1) { this.effect = MobEffects.SPEED; } else if (i <= 2) { this.effect = MobEffects.STRENGTH; } else if (i <= 3) { this.effect = MobEffects.REGENERATION; } else if (i <= 4) { this.effect = MobEffects.INVISIBILITY; } } } static class SpiderTargetGoal extends NearestAttackableTargetGoal { public SpiderTargetGoal(Spider spider, Class entityTypeToTarget) { super(spider, entityTypeToTarget, true); } @Override public boolean canUse() { float f = this.mob.getLightLevelDependentMagicValue(); return f >= 0.5F ? false : super.canUse(); } } }