Purpur/patches/server/0020-Giants-AI-settings.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Sun, 12 May 2019 00:43:12 -0500
Subject: [PATCH] Giants AI settings


diff --git a/src/main/java/net/minecraft/world/entity/monster/Giant.java b/src/main/java/net/minecraft/world/entity/monster/Giant.java
index 9602e59cbebeedc85ea75d2a41d3e74f0ff45b46..3c1217d36522b1fd3d1a099d3a12d99016f34c4b 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Giant.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Giant.java
@@ -1,11 +1,34 @@
 package net.minecraft.world.entity.monster;
 
 import net.minecraft.core.BlockPos;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.world.Difficulty;
+import net.minecraft.world.DifficultyInstance;
 import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.entity.EquipmentSlot;
+import net.minecraft.world.entity.MobSpawnType;
+import net.minecraft.world.entity.SpawnGroupData;
 import net.minecraft.world.entity.ai.attributes.AttributeSupplier;
 import net.minecraft.world.entity.ai.attributes.Attributes;
+import net.minecraft.world.entity.ai.goal.FloatGoal;
+import net.minecraft.world.entity.ai.goal.LookAtPlayerGoal;
+import net.minecraft.world.entity.ai.goal.MeleeAttackGoal;
+import net.minecraft.world.entity.ai.goal.MoveTowardsRestrictionGoal;
+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.animal.IronGolem;
+import net.minecraft.world.entity.animal.Turtle;
+import net.minecraft.world.entity.npc.Villager;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.Items;
 import net.minecraft.world.level.Level;
 import net.minecraft.world.level.LevelReader;
+import net.minecraft.world.level.ServerLevelAccessor;
+
+import javax.annotation.Nullable;
 
 public class Giant extends Monster {
     public Giant(EntityType<? extends Giant> type, Level world) {
@@ -30,8 +53,23 @@ public class Giant extends Monster {
 
     @Override
     protected void registerGoals() {
-        this.goalSelector.addGoal(0, new org.purpurmc.purpur.entity.ai.HasRider(this));
-        this.targetSelector.addGoal(0, new org.purpurmc.purpur.entity.ai.HasRider(this));
+        if (level().purpurConfig.giantHaveAI) {
+            this.goalSelector.addGoal(0, new FloatGoal(this));
+            this.goalSelector.addGoal(0, new org.purpurmc.purpur.entity.ai.HasRider(this));
+            this.goalSelector.addGoal(7, new WaterAvoidingRandomStrollGoal(this, 1.0D));
+            this.goalSelector.addGoal(8, new LookAtPlayerGoal(this, Player.class, 16.0F));
+            this.goalSelector.addGoal(8, new RandomLookAroundGoal(this));
+            this.goalSelector.addGoal(5, new MoveTowardsRestrictionGoal(this, 1.0D));
+            if (level().purpurConfig.giantHaveHostileAI) {
+                this.goalSelector.addGoal(2, new MeleeAttackGoal(this, 1.0D, false));
+                this.targetSelector.addGoal(0, new org.purpurmc.purpur.entity.ai.HasRider(this));
+                this.targetSelector.addGoal(1, new HurtByTargetGoal(this).setAlertOthers(ZombifiedPiglin.class));
+                this.targetSelector.addGoal(2, new NearestAttackableTargetGoal<>(this, Player.class, true));
+                this.targetSelector.addGoal(3, new NearestAttackableTargetGoal<>(this, Villager.class, false));
+                this.targetSelector.addGoal(4, new NearestAttackableTargetGoal<>(this, IronGolem.class, true));
+                this.targetSelector.addGoal(5, new NearestAttackableTargetGoal<>(this, Turtle.class, true));
+            }
+        }
     }
 
     @Override
@@ -47,8 +85,34 @@ public class Giant extends Monster {
         return Monster.createMonsterAttributes().add(Attributes.MAX_HEALTH, 100.0).add(Attributes.MOVEMENT_SPEED, 0.5).add(Attributes.ATTACK_DAMAGE, 50.0);
     }
 
+    @Override
+    public SpawnGroupData finalizeSpawn(ServerLevelAccessor world, DifficultyInstance difficulty, MobSpawnType spawnReason, @Nullable SpawnGroupData entityData) {
+        SpawnGroupData groupData = super.finalizeSpawn(world, difficulty, spawnReason, entityData);
+        if (groupData == null) {
+            populateDefaultEquipmentSlots(this.random, difficulty);
+            populateDefaultEquipmentEnchantments(this.random, difficulty);
+        }
+        return groupData;
+    }
+
+    @Override
+    protected void populateDefaultEquipmentSlots(net.minecraft.util.RandomSource random, DifficultyInstance difficulty) {
+        super.populateDefaultEquipmentSlots(this.random, difficulty);
+        // TODO make configurable
+        if (random.nextFloat() < (level().getDifficulty() == Difficulty.HARD ? 0.1F : 0.05F)) {
+            this.setItemSlot(EquipmentSlot.MAINHAND, new ItemStack(Items.IRON_SWORD));
+        }
+    }
+
+    @Override
+    public float getJumpPower() {
+        // make giants jump as high as everything else relative to their size
+        // 1.0 makes bottom of feet about as high as their waist when they jump
+        return level().purpurConfig.giantJumpHeight;
+    }
+
     @Override
     public float getWalkTargetValue(BlockPos pos, LevelReader world) {
-        return world.getPathfindingCostFromLightLevels(pos);
+        return super.getWalkTargetValue(pos, world); // Purpur - fix light requirements for natural spawns
     }
 }
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 66061f3f70161c8b95cd5f6a148ad6a008f3190d..9ec335f41361a39ff6bfdc93c53d242383dad594 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -522,6 +522,10 @@ public class PurpurWorldConfig {
     public double giantMovementSpeed = 0.5D;
     public double giantAttackDamage = 50.0D;
     public double giantMaxHealth = 100.0D;
+    public float giantStepHeight = 2.0F;
+    public float giantJumpHeight = 1.0F;
+    public boolean giantHaveAI = false;
+    public boolean giantHaveHostileAI = false;
     private void giantSettings() {
         giantRidable = getBoolean("mobs.giant.ridable", giantRidable);
         giantRidableInWater = getBoolean("mobs.giant.ridable-in-water", giantRidableInWater);
@@ -538,6 +542,10 @@ public class PurpurWorldConfig {
             set("mobs.giant.attributes.max_health", oldValue);
         }
         giantMaxHealth = getDouble("mobs.giant.attributes.max_health", giantMaxHealth);
+        giantStepHeight = (float) getDouble("mobs.giant.step-height", giantStepHeight);
+        giantJumpHeight = (float) getDouble("mobs.giant.jump-height", giantJumpHeight);
+        giantHaveAI = getBoolean("mobs.giant.have-ai", giantHaveAI);
+        giantHaveHostileAI = getBoolean("mobs.giant.have-hostile-ai", giantHaveHostileAI);
     }
 
     public boolean glowSquidRidable = false;