added: math extensions file

Assets/Scripts/Core/MathExtensions.cs

@@ -0,0 +1,16 @@
+using UnityEngine;
+
+public static class MathExtensions{
+    public static Vector3 Flatten(this Vector3 origin, float? x = null, float? y = null, float? z = null){
+        return new Vector3(x ?? origin.x, y ?? origin.y, z ?? origin.z);
+    }
+
+    public static Quaternion Flatten(this Quaternion input, float? x = null, float? y = null, float? z = null){
+        return Quaternion.Euler(input.eulerAngles.Flatten(x, y, z));
+    }
+
+    public static Vector3 DirectionTo(this Vector3 origin, Vector3 to){
+        return (to - origin).normalized;
+    }
+
+}