Fixed #29 Lithium breaks stray cat behavior.

src/main/java/me/jellysquid/mods/lithium/common/entity/tracker/nearby/NearbyEntityTracker.java

@@ -1,6 +1,8 @@
 package me.jellysquid.mods.lithium.common.entity.tracker.nearby;
 
 import net.minecraft.entity.LivingEntity;
+import net.minecraft.entity.ai.TargetPredicate;
+import net.minecraft.util.math.Box;
 import net.minecraft.util.math.MathHelper;
 
 import java.util.HashSet;
@@ -51,7 +53,15 @@ public void onEntityLeftRange(LivingEntity entity) {
         this.nearby.remove((T) entity);
     }
 
-    public T getClosestEntity() {
+    /**
+     * Gets the closest T (extends LivingEntity) to the center of this tracker that also intersects with the given box and meets the
+     * requirements of the targetPredicate.
+     * The result may be different from vanilla if there are multiple closest entities.
+     * @param box the box the entities have to intersect
+     * @param targetPredicate predicate the entity has to meet
+     * @return the closest Entity that meets all requirements (distance, box intersection, predicate, type T)
+     */
+    public T getClosestEntity(Box box, TargetPredicate targetPredicate) {
         double x = this.self.getX();
         double y = this.self.getY();
         double z = this.self.getZ();
@@ -62,7 +72,7 @@ public T getClosestEntity() {
         for (T entity : this.nearby) {
             double distance = entity.squaredDistanceTo(x, y, z);
 
-            if (distance < nearestDistance) {
+            if (distance < nearestDistance && (box == null || box.intersects(entity.getBoundingBox())) && targetPredicate.test(this.self, entity)) {
                 nearest = entity;
                 nearestDistance = distance;
             }

src/main/java/me/jellysquid/mods/lithium/mixin/ai/nearby_entity_tracking/goals/MixinFleeEntityGoal.java

@@ -29,6 +29,6 @@ private void init(MobEntityWithAi mob, Class<T> fleeFromType, Predicate<LivingEn
 
     @Redirect(method = "canStart", at = @At(value = "INVOKE", target = "Lnet/minecraft/world/World;getClosestEntityIncludingUngeneratedChunks(Ljava/lang/Class;Lnet/minecraft/entity/ai/TargetPredicate;Lnet/minecraft/entity/LivingEntity;DDDLnet/minecraft/util/math/Box;)Lnet/minecraft/entity/LivingEntity;"))
     private T redirectGetNearestEntity(World world, Class<? extends T> entityClass, TargetPredicate targetPredicate, LivingEntity entity, double x, double y, double z, Box box) {
-        return this.tracker.getClosestEntity();
+        return this.tracker.getClosestEntity(box, targetPredicate);
     }
 }

src/main/java/me/jellysquid/mods/lithium/mixin/ai/nearby_entity_tracking/goals/MixinLookAtGoal.java

@@ -28,11 +28,11 @@ private void init(MobEntity mob, Class<? extends LivingEntity> targetType, float
 
     @Redirect(method = "canStart", at = @At(value = "INVOKE", target = "Lnet/minecraft/world/World;getClosestEntityIncludingUngeneratedChunks(Ljava/lang/Class;Lnet/minecraft/entity/ai/TargetPredicate;Lnet/minecraft/entity/LivingEntity;DDDLnet/minecraft/util/math/Box;)Lnet/minecraft/entity/LivingEntity;"))
     private <T extends LivingEntity> LivingEntity redirectGetClosestEntity(World world, Class<? extends T> entityClass, TargetPredicate targetPredicate, LivingEntity entity, double x, double y, double z, Box box) {
-        return this.tracker.getClosestEntity();
+        return this.tracker.getClosestEntity(box, targetPredicate);
     }
 
     @Redirect(method = "canStart", at = @At(value = "INVOKE", target = "Lnet/minecraft/world/World;getClosestPlayer(Lnet/minecraft/entity/ai/TargetPredicate;Lnet/minecraft/entity/LivingEntity;DDD)Lnet/minecraft/entity/player/PlayerEntity;"))
     private PlayerEntity redirectGetClosestPlayer(World world, TargetPredicate targetPredicate, LivingEntity entity, double x, double y, double z) {
-        return (PlayerEntity) this.tracker.getClosestEntity();
+        return (PlayerEntity) this.tracker.getClosestEntity(null, targetPredicate);
     }
 }