Added Entity#setRotation.

Unlike Entity#teleport this can also be used while the entity is inside a vehicle.

src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java

@@ -29,6 +29,7 @@ import org.bukkit.permissions.PermissionAttachmentInfo;
 import org.bukkit.permissions.ServerOperator;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.util.BoundingBox;
+import org.bukkit.util.NumberConversions;
 import org.bukkit.util.Vector;
 
 public abstract class CraftEntity implements org.bukkit.entity.Entity {
@@ -291,6 +292,21 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
         return entity.world.getWorld();
     }
 
+    @Override
+    public void setRotation(float yaw, float pitch) {
+        NumberConversions.checkFinite(pitch, "pitch not finite");
+        NumberConversions.checkFinite(yaw, "yaw not finite");
+
+        yaw = Location.normalizeYaw(yaw);
+        pitch = Location.normalizePitch(pitch);
+
+        entity.yaw = yaw;
+        entity.pitch = pitch;
+        entity.lastYaw = yaw;
+        entity.lastPitch = pitch;
+        entity.setHeadRotation(yaw);
+    }
+
     public boolean teleport(Location location) {
         return teleport(location, TeleportCause.PLUGIN);
     }

src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java

@@ -566,6 +566,11 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         getHandle().playerConnection.sendPacket(packet);
     }
 
+    @Override
+    public void setRotation(float yaw, float pitch) {
+        throw new UnsupportedOperationException("Cannot set rotation of players. Consider teleporting instead.");
+    }
+
     @Override
     public boolean teleport(Location location, PlayerTeleportEvent.TeleportCause cause) {
         Preconditions.checkArgument(location != null, "location");