Fixed some following bugs.

src/main/java/net/nuggetmc/ai/utils/MathUtils.java

@@ -27,4 +27,13 @@ public class MathUtils {
 
         return out;
     }
+
+    public static Vector circleOffset(double r) {
+        double rad = 2 * Math.random() * Math.PI;
+
+        double x = r * Math.random() * Math.cos(rad);
+        double z = r * Math.random() * Math.sin(rad);
+
+        return new Vector(x, 0, z);
+    }
 }

src/main/java/net/nuggetmc/ai/utils/PlayerUtils.java

@@ -0,0 +1,10 @@
+package net.nuggetmc.ai.utils;
+
+import org.bukkit.GameMode;
+
+public class PlayerUtils {
+
+    public static boolean isVulnerableGamemode(GameMode mode) {
+        return mode == GameMode.SURVIVAL || mode == GameMode.ADVENTURE;
+    }
+}