Make NPC necks less flexible

Author: Malfrador

src/main/java/de/erethon/aether/creature/AetherBaseMob.java

@@ -43,6 +43,7 @@
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.sounds.SoundEvents;
 import net.minecraft.sounds.SoundSource;
+import net.minecraft.util.Mth;
 import net.minecraft.world.InteractionHand;
 import net.minecraft.world.InteractionResult;
 import net.minecraft.world.damagesource.DamageSource;
@@ -156,8 +157,12 @@ public void addToWorld() {
     @Override
     public void tick() {
         super.tick();
+        float headBodyDiff = Mth.wrapDegrees(yHeadRot - yBodyRot);
+        if (Math.abs(headBodyDiff) > 30.0f) {
+            yBodyRot += headBodyDiff * 0.3f;
+        }
         getBukkitLivingEntity().setMaxEnergy(100);
-        getBukkitLivingEntity().setEnergy(100); // Mobs have infinite energy
+        getBukkitLivingEntity().setEnergy(100);
     }
 
     private void logDebug(String message) {

src/main/java/de/erethon/aether/creature/AetherPlayer.java

@@ -116,13 +116,16 @@ public float getPreciseBodyRotation(float partialTick) {
     @Override
     public void lookAt(Entity entity, float maxYRotIncrease, float maxXRotIncrease) {
         super.lookAt(entity, maxYRotIncrease, maxXRotIncrease);
-        yBodyRot = Mth.rotateIfNecessary(yBodyRot, yHeadRot, maxYRotIncrease);
+        yBodyRot = Mth.rotateIfNecessary(yBodyRot, yHeadRot, maxYRotIncrease * 0.5f);
     }
 
     @Override
     public void tick() {
         super.tick();
-        // Rotate the NPC
+        float headBodyDiff = Mth.wrapDegrees(yHeadRot - yBodyRot);
+        if (Math.abs(headBodyDiff) > 30.0f) {
+            yBodyRot += headBodyDiff * 0.3f;
+        }
         setYRot(yBodyRot);
     }