Even more DotNet stuff, help

2026-09-05 21:01:52 +00:00 · 2022-04-26 22:36:27 +02:00
parent ad1b37dc64
commit 8c53f21690
14 changed files with 821 additions and 63 deletions
@@ -0,0 +1,59 @@
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace DotNetScriptingHelper;
+
+public abstract class ScriptableEntity
+{
+    internal Entity Entity;
+    
+    public virtual void OnCreate() { }
+    protected virtual void OnDestroy() { }
+    protected virtual void OnUpdate() { }
+
+    [UnmanagedCallersOnly]
+    public static void UpdateEntity(IntPtr entityPtr)
+    {
+        GCHandle entityHandle = GCHandle.FromIntPtr(entityPtr);
+
+        if (entityHandle.Target is ScriptableEntity entity)
+        {
+            entity.OnUpdate();
+        }
+    }
+
+    [UnmanagedCallersOnly]
+    public static IntPtr CreateInstance(IntPtr typeNamePtr, int typeNameLength, EcsEntity entity)
+    {
+        try
+        {
+            string typeName = Marshal.PtrToStringUTF8(typeNamePtr, typeNameLength);
+            
+            Type? type = Type.GetType(typeName, true);
+            
+            if (type == null)
+                return IntPtr.Zero;
+            
+            object? instance = Activator.CreateInstance(type);
+
+            if (type == null)
+                return IntPtr.Zero;
+
+            Debug.Assert(instance is ScriptableEntity, "Activated instance doesn't inherit from ScriptableEntity");
+
+            if (instance is not ScriptableEntity scriptableEntity)
+                return IntPtr.Zero;
+            
+            scriptableEntity.Entity = new Entity(entity);
+            scriptableEntity.OnCreate();
+
+            GCHandle handle = GCHandle.Alloc(instance);
+            return GCHandle.ToIntPtr(handle);
+        }
+        catch (Exception e)
+        {
+            Console.WriteLine(e);
+            throw;
+        }
+    }
+}