Added Pacore

Assets/Pacore/Runtime/CreateInstanceOnStartLoader.cs

@@ -0,0 +1,33 @@
+using PashaBibko.Pacore.Attributes;
+using System.Collections.ObjectModel;
+using UnityEngine;
+using System;
+
+using Object = UnityEngine.Object;
+
+namespace PashaBibko.Pacore
+{
+    public static class CreateInstanceOnStartLoader
+    {
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
+        private static void CreateAllInstances()
+        {
+            /* Fetches all the types with the CreateInstanceOnStart attribute */
+            ReadOnlyCollection<Type> types =
+                ClassAttributeCache.GetAttributesOf<CreateInstanceOnStartAttribute>();
+
+            /* Creates a holder for all the other game objects to not clutter inspector */
+            GameObject holder = new("ScriptSpawnedInstances");
+            Object.DontDestroyOnLoad(holder); // Stops all the game objects from being destroyed
+            
+            Transform parent = holder.transform;
+            
+            /* Creates all the game objects for the selected types */ 
+            foreach (Type type in types)
+            {
+                GameObject go = new(type.Name, type);
+                go.transform.SetParent(parent);
+            }
+        }
+    }
+}