add FindEntityByName function

Hazel-ScriptCore/Sources/Hazel/InternalCalls.cs

@@ -5,6 +5,12 @@ namespace Hazel
 {
     public static class InternalCalls
     {
+        [MethodImplAttribute(MethodImplOptions.InternalCall)]
+        internal extern static ulong Entity_FindEntityByName(String name);
+
+        [MethodImplAttribute(MethodImplOptions.InternalCall)]
+        internal extern static object GetScriptInstance(ulong entityID);
+
         [MethodImplAttribute(MethodImplOptions.InternalCall)]
         internal extern static bool Entity_HasComponent(ulong entityID, Type componentType);
 

Hazel-ScriptCore/Sources/Hazel/Scene/Entity.cs

@@ -32,11 +32,26 @@ namespace Hazel{
 
         public T GetComponent<T>() where T : Component, new()
         {
-            if(!HasComponent<T>())
+            if (!HasComponent<T>())
                 return null;
             T component = new T() { Entity = this };
             return component;
         }
 
+
+        public Entity FindEntityByName(string name)
+        {
+            ulong entityID = InternalCalls.Entity_FindEntityByName(name);
+            if (entityID == 0)
+                return null;
+
+            return new Entity(entityID);
+        }
+
+        public T As<T>() where T : Entity, new()
+        {
+            object instance = InternalCalls.GetScriptInstance(ID);
+            return instance as T;
+        }
     }
 }

Hazel-ScriptCore/Sources/Hazel/Vector.cs

@@ -40,6 +40,13 @@ namespace Hazel
              Z = scale;
          }
 
+         public Vector3(Vector2 xy, float z)
+         {
+            X = xy.X;
+            Y = xy.Y;
+            Z = z;
+         }
+
          public Vector3(float x, float y, float z) {
              X = x;
              Y = y;