Fix pathfinding + cleanup

src/main/java/net/minestom/server/entity/Entity.java

@@ -75,7 +75,7 @@ public class Entity implements Viewable, EventHandler, DataContainer, Permission
     protected Entity vehicle;
 
     // Velocity
-    protected Vector  velocity   = new Vector(); // Movement in block per second
+    protected Vector velocity = new Vector(); // Movement in block per second
     protected boolean hasPhysics = true;
 
     protected double gravityDragPerTick;
@@ -814,7 +814,7 @@ public class Entity implements Viewable, EventHandler, DataContainer, Permission
     /**
      * Changes the entity instance, i.e. spawns it.
      *
-     * @param instance the new instance of the entity
+     * @param instance      the new instance of the entity
      * @param spawnPosition the spawn position for the entity.
      * @throws IllegalStateException if {@code instance} has not been registered in {@link InstanceManager}
      */
@@ -845,7 +845,9 @@ public class Entity implements Viewable, EventHandler, DataContainer, Permission
      * @param instance the new instance of the entity
      * @throws NullPointerException  if {@code instance} is null
      * @throws IllegalStateException if {@code instance} has not been registered in {@link InstanceManager}
+     * @deprecated Use {@link Entity#setInstance(Instance, Position)} instead.
      */
+    @Deprecated
     public void setInstance(@NotNull Instance instance) {
         setInstance(instance, this.position);
     }

src/main/java/net/minestom/server/entity/EntityCreature.java

@@ -69,15 +69,10 @@ public class EntityCreature extends LivingEntity implements NavigableEntity, Ent
     }
 
     @Override
-    public void setInstance(@NotNull Instance instance) {
+    public void setInstance(@NotNull Instance instance, @NotNull Position spawnPosition) {
         this.navigator.setPathFinder(new HydrazinePathFinder(navigator.getPathingEntity(), instance.getInstanceSpace()));
 
-        super.setInstance(instance);
-    }
-
-    @Override
-    public void spawn() {
-
+        super.setInstance(instance, spawnPosition);
     }
 
     @Override

src/main/java/net/minestom/server/entity/LivingEntity.java

@@ -26,7 +26,6 @@ import net.minestom.server.utils.block.BlockIterator;
 import net.minestom.server.utils.time.CooldownUtils;
 import net.minestom.server.utils.time.TimeUnit;
 import net.minestom.server.utils.time.UpdateOption;
-import net.minestom.server.utils.validate.Check;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -250,11 +249,6 @@ public class LivingEntity extends Entity implements EquipmentHandler {
         }
     }
 
-    @Override
-    public void spawn() {
-
-    }
-
     /**
      * Gets the amount of arrows in the entity.
      *
@@ -723,10 +717,10 @@ public class LivingEntity extends Entity implements EquipmentHandler {
      * @return if the current entity has line of sight to the given one.
      */
     public boolean hasLineOfSight(Entity entity) {
-        Vector start       = getPosition().toVector().add(0D, getEyeHeight(), 0D);
-        Vector end         = entity.getPosition().toVector().add(0D, getEyeHeight(), 0D);
-        Vector direction   = end.subtract(start);
-        int    maxDistance = (int) Math.ceil(direction.length());
+        Vector start = getPosition().toVector().add(0D, getEyeHeight(), 0D);
+        Vector end = entity.getPosition().toVector().add(0D, getEyeHeight(), 0D);
+        Vector direction = end.subtract(start);
+        int maxDistance = (int) Math.ceil(direction.length());
 
         Iterator<BlockPosition> it = new BlockIterator(start, direction.normalize(), 0D, maxDistance);
         while (it.hasNext()) {

src/main/java/net/minestom/server/entity/Metadata.java

@@ -102,9 +102,7 @@ public class Metadata {
     }
 
     public static Value<NBT> NBT(@NotNull NBT nbt) {
-        return new Value<>(TYPE_NBT, nbt, writer -> {
-            writer.writeNBT("", nbt);
-        });
+        return new Value<>(TYPE_NBT, nbt, writer -> writer.writeNBT("", nbt));
     }
 
     public static Value<int[]> VillagerData(int villagerType,