More actor and UObject progress

src/Prospect.Server.Game/Client.cs

@@ -15,7 +15,7 @@ internal class Client
     public async Task<UIpNetDriver> Connect(string ipAddr, int port, FUrl worldUrl)
     {
         var connection = new UIpNetDriver(System.Net.IPAddress.Parse(ipAddr), port, false);
-        await using (var world = new ProspectWorld(worldUrl))
+        await using (var world = new ProspectWorld())
             connection.InitConnect(world, new FUrl { Host = System.Net.IPAddress.Parse(ipAddr), Port = port });
         UnitConn = connection.ServerConnection;
         connection.ServerConnection.Handler?.BeginHandshaking(SendInitialJoin);

src/Prospect.Unreal/Core/Math/FQuat.cs

@@ -0,0 +1,6 @@
+namespace Prospect.Unreal.Core.Math;
+
+public class FQuat
+{
+    
+}

src/Prospect.Unreal/Core/Math/FRotator.cs

@@ -0,0 +1,6 @@
+namespace Prospect.Unreal.Core.Math;
+
+public class FRotator
+{
+    
+}

src/Prospect.Unreal/Core/Math/FTransform.cs

@@ -0,0 +1,7 @@
+namespace Prospect.Unreal.Core.Math;
+
+public ref struct FTransform
+{
+    public FVector Location { get; set; }
+    public FRotator Rotation { get; set; }
+}

src/Prospect.Unreal/Core/Math/FVector.cs

@@ -0,0 +1,6 @@
+namespace Prospect.Unreal.Core.Math;
+
+public class FVector
+{
+    
+}

src/Prospect.Unreal/Core/Objects/EObjectFlags.cs

@@ -1,4 +1,4 @@
-namespace Prospect.Unreal.Core;
+namespace Prospect.Unreal.Core.Objects;
 
 [Flags]
 public enum EObjectFlags

src/Prospect.Unreal/Core/Objects/GUClassArray.cs

@@ -0,0 +1,18 @@
+namespace Prospect.Unreal.Core.Objects;
+
+/// <summary>
+///     Custom class to help with <code>T::StaticClass()</code> code.
+/// </summary>
+public class GUClassArray
+{
+    public static UClass StaticClass<T>()
+    {
+        return StaticClass(typeof(T));
+    }
+
+    public static UClass StaticClass(Type type)
+    {
+        // TODO: Implement
+        return new UClass();
+    }
+}

src/Prospect.Unreal/Core/Objects/GUObjectArray.cs

@@ -0,0 +1,6 @@
+namespace Prospect.Unreal.Core.Objects;
+
+public static class GUObjectArray
+{
+    
+}

src/Prospect.Unreal/Core/Objects/UClass.cs

@@ -0,0 +1,8 @@
+using Prospect.Unreal.Core.Properties;
+
+namespace Prospect.Unreal.Core.Objects;
+
+public class UClass : UStruct
+{
+    
+}

src/Prospect.Unreal/Core/Objects/UObject.cs

@@ -0,0 +1,6 @@
+namespace Prospect.Unreal.Core.Objects;
+
+public class UObject : UObjectBaseUtility
+{
+    
+}

src/Prospect.Unreal/Core/Objects/UObjectBase.cs

@@ -0,0 +1,85 @@
+using System.Runtime.CompilerServices;
+using Prospect.Unreal.Core.Names;
+
+namespace Prospect.Unreal.Core.Objects;
+
+public class UObjectBase
+{
+    /// <summary>
+    ///     Flags used to track and report various object states.
+    /// </summary>
+    private EObjectFlags _objectFlags;
+
+    /// <summary>
+    ///     Index into GObjectArray...very private.
+    /// </summary>
+    private int _internalIndex;
+
+    /// <summary>
+    ///     Class the object belongs to.
+    /// </summary>
+    private UClass _classPrivate;
+
+    /// <summary>
+    ///     Name of this object.
+    /// </summary>
+    private FName _namePrivate;
+
+    /// <summary>
+    ///     Object this object resides in.
+    /// </summary>
+    private UObject? _outerPrivate;
+
+    public UObjectBase()
+    {
+    }
+
+    /// <summary>
+    ///     Returns the unique ID of the object...these are reused so it is only unique while the object is alive.
+    ///     Useful as a tag.
+    /// </summary>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public uint GetUniqueID()
+    {
+        return (uint)_internalIndex;
+    }
+
+    /// <summary>
+    ///     Returns the UClass that defines the fields of this object.
+    /// </summary>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public UClass GetClass()
+    {
+        return _classPrivate;
+    }
+
+    /// <summary>
+    ///     Returns the UObject this object resides in.
+    /// </summary>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public UObject? GetOuter()
+    {
+        return _outerPrivate;
+    }
+
+    /// <summary>
+    ///     Returns the logical name of this object.
+    /// </summary>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public FName GetFName()
+    {
+        return _namePrivate;
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected void SetFlagsTo(EObjectFlags newFlags)
+    {
+        _objectFlags = newFlags;
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public EObjectFlags GetFlags()
+    {
+        return _objectFlags;
+    }
+}

src/Prospect.Unreal/Core/Objects/UObjectBaseUtility.cs

@@ -0,0 +1,79 @@
+using System.Runtime.CompilerServices;
+
+namespace Prospect.Unreal.Core.Objects;
+
+public class UObjectBaseUtility : UObjectBase
+{
+    /*
+     * Flags
+     */
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public void SetFlags(EObjectFlags newFlags)
+    {
+        SetFlagsTo(GetFlags() | newFlags);
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public void ClearFlags(EObjectFlags newFlags)
+    {
+        SetFlagsTo(GetFlags() | ~newFlags);
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public bool HasAnyFlags(EObjectFlags flagsToCheck)
+    {
+        return (GetFlags() & flagsToCheck) != 0;
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public bool HasAllFlags(EObjectFlags flagsToCheck)
+    {
+        return (GetFlags() & flagsToCheck) == flagsToCheck;
+    }
+    
+    /*
+     * Marks
+     */
+    public bool IsUnreachable()
+    {
+        // TODO: GUObjectArray
+        return false;
+    }
+    
+    /*
+     * Outer & Package
+     */
+    public UObject? GetTypedOuter(UClass target)
+    {
+        UObject? result = null;
+        for (var nextOuter = GetOuter(); result == null && nextOuter != null; nextOuter = nextOuter.GetOuter())
+        {
+            if (nextOuter.IsA(target))
+            {
+                result = nextOuter;
+            }
+        }
+        return result;
+    }
+    
+    public T? GetTypedOuter<T>() where T : UObject
+    {
+        return (T?)GetTypedOuter(GUClassArray.StaticClass<T>());
+    }
+    
+    /*
+     * Class
+     */
+    public bool IsChildOfWorkaround(UClass objClass, UClass testClass)
+    {
+        return objClass.IsChildOf(testClass);
+    }
+    
+    public bool IsA(UClass someBase)
+    {
+        var someBaseClass = someBase;
+        var thisClass = GetClass();
+        
+        return IsChildOfWorkaround(thisClass, someBaseClass);
+    }
+}

src/Prospect.Unreal/Core/Properties/UField.cs

@@ -0,0 +1,8 @@
+using Prospect.Unreal.Core.Objects;
+
+namespace Prospect.Unreal.Core.Properties;
+
+public class UField : UObject
+{
+    
+}

src/Prospect.Unreal/Core/Properties/UStruct.cs

@@ -0,0 +1,37 @@
+namespace Prospect.Unreal.Core.Properties;
+
+public class UStruct : UField
+{
+    private UStruct? _superStruct;
+    
+    public bool IsChildOf(UStruct? someBase)
+    {
+        if (someBase == null)
+        {
+            return false;
+        }
+
+        var bOldResult = false;
+        
+        for (var tempStruct = this; tempStruct != null; tempStruct = tempStruct.GetSuperStruct())
+        {
+            if (tempStruct == someBase)
+            {
+                bOldResult = true;
+                break;
+            }
+        }
+
+        return bOldResult;
+    }
+
+    public UStruct? GetSuperStruct()
+    {
+        return _superStruct;
+    }
+
+    public virtual void SetSuperStruct(UStruct newSuperStruct)
+    {
+        _superStruct = newSuperStruct;
+    }
+}

src/Prospect.Unreal/Core/ULevel.cs

@@ -1,8 +1,10 @@
-using Prospect.Unreal.Net.Actors;
+using Prospect.Unreal.Core.Objects;
+using Prospect.Unreal.Net.Actors;
+using Prospect.Unreal.Runtime;
 
 namespace Prospect.Unreal.Core;
 
-public class ULevel
+public class ULevel : UObject
 {
     public ULevel()
     {
@@ -19,6 +21,13 @@ public class ULevel
     /// </summary>
     public List<AActor> Actors { get; private set; }
 
+    /// <summary>
+    ///     The World that has this level in its Levels array. 
+    ///     This is not the same as GetOuter(), because GetOuter() for a streaming level is a vestigial world that is not used. 
+    ///     It should not be accessed during BeginDestroy(), just like any other UObject references, since GC may occur in any order.
+    /// </summary>
+    public UWorld OwningWorld { get; private set; }
+    
     public void InitializeNetworkActors()
     {
         throw new NotImplementedException();

src/Prospect.Unreal/Core/UObject.cs

@@ -1,6 +0,0 @@
-namespace Prospect.Unreal.Core;
-
-public class UObject
-{
-    
-}

src/Prospect.Unreal/Net/Actors/AActor.cs

@@ -1,12 +1,19 @@
 using Prospect.Unreal.Core;
+using Prospect.Unreal.Core.Objects;
 using Prospect.Unreal.Runtime;
 
 namespace Prospect.Unreal.Net.Actors;
 
-public class AActor
+public class AActor : UObject
 {
     private bool bActorInitialized;
 
+    // TODO: UPROPERTY(BlueprintReadWrite, ReplicatedUsing=OnRep_Instigator, meta=(ExposeOnSpawn=true, AllowPrivateAccess=true), Category=Actor)
+    /// <summary>
+    ///     Pawn responsible for damage and other gameplay events caused by this actor.
+    /// </summary>
+    private APawn? _instigator;
+    
     /// <summary>
     ///     Sets the value of Role without causing other side effects to this instance.
     /// </summary>
@@ -36,9 +43,38 @@ public class AActor
         throw new NotImplementedException();
     }
 
-    public UWorld GetWorld()
+    public UWorld? GetWorld()
     {
-        // if ()
+        if (!HasAnyFlags(EObjectFlags.RF_ClassDefaultObject))
+        {
+            var outer = GetOuter();
+            if (outer == null)
+            {
+                return null;
+            }
+
+            if (!outer.HasAnyFlags(EObjectFlags.RF_BeginDestroyed) &&
+                !outer.IsUnreachable())
+            {
+                var level = GetLevel();
+                if (level != null)
+                {
+                    return level.OwningWorld;
+                }
+            }
+        }
+
+        return null;
+    }
+
+    public ULevel? GetLevel()
+    {
+        return GetTypedOuter<ULevel>();
+    }
+
+    public APawn? GetInstigator()
+    {
+        return _instigator;
     }
 
     public bool IsActorInitialized()

src/Prospect.Unreal/Net/Actors/AGameModeBase.cs

@@ -1,4 +1,5 @@
 using Prospect.Unreal.Core;
+using Prospect.Unreal.Core.Objects;
 using Prospect.Unreal.Runtime;
 
 namespace Prospect.Unreal.Net.Actors;
@@ -19,6 +20,12 @@ public class AGameModeBase : AInfo
 
     public virtual void InitGame(string mapName, string options, out string errorMessage)
     {
+        // Default error.
+        errorMessage = string.Empty;
+        
+        // Find world.
+        var world = GetWorld();
+        
         // Save Options for future use
         OptionsString = options;
 
@@ -28,7 +35,7 @@ public class AGameModeBase : AInfo
             ObjectFlags = EObjectFlags.RF_Transient
         };
 
-        GameSession = World.SpawnActor();
+        // GameSession = world.SpawnActor();
     }
 
     public virtual void InitGameState()

src/Prospect.Unreal/Net/Actors/APawn.cs

@@ -0,0 +1,6 @@
+namespace Prospect.Unreal.Net.Actors;
+
+public class APawn : AActor
+{
+    
+}

src/Prospect.Unreal/Net/FActorSpawnParameters.cs

@@ -1,5 +1,6 @@
 using Prospect.Unreal.Core;
 using Prospect.Unreal.Core.Names;
+using Prospect.Unreal.Core.Objects;
 using Prospect.Unreal.Net.Actors;
 
 namespace Prospect.Unreal.Net;
@@ -10,7 +11,7 @@ public ref struct FActorSpawnParameters
     ///     A name to assign as the Name of the Actor being spawned.
     ///     If no value is specified, the name of the spawned Actor will be automatically generated using the form [Class]_[Number].
     /// </summary>
-    public FName? Name { get; set; }
+    public FName Name { get; set; } = EName.None;
     
     /// <summary>
     ///     An Actor to use as a template when spawning the new Actor.

src/Prospect.Unreal/Runtime/UGameInstance.cs

@@ -1,4 +1,6 @@
 using Prospect.Unreal.Core;
+using Prospect.Unreal.Core.Objects;
+using Prospect.Unreal.Net;
 using Prospect.Unreal.Net.Actors;
 
 namespace Prospect.Unreal.Runtime;
@@ -8,6 +10,13 @@ public class UGameInstance
     public AGameModeBase? CreateGameModeForURL(FUrl inUrl, UWorld inWorld)
     {
         // TODO: World.SpawnActor
-        return new AGameModeBase();
+        
+        var spawnInfo = new FActorSpawnParameters
+        {
+            SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod.AlwaysSpawn,
+            ObjectFlags = EObjectFlags.RF_Transient
+        };
+        
+        return inWorld.SpawnActor<AGameModeBase>(GUClassArray.StaticClass<AGameModeBase>(), spawnInfo);
     }
 }

src/Prospect.Unreal/Runtime/UWorld.LevelActor.cs

@@ -1,5 +1,7 @@
 using System.Text;
 using Prospect.Unreal.Core;
+using Prospect.Unreal.Core.Math;
+using Prospect.Unreal.Core.Objects;
 using Prospect.Unreal.Net;
 using Prospect.Unreal.Net.Actors;
 
@@ -42,4 +44,54 @@ public partial class UWorld
         Logger.Warning("Login failed: No game mode set");
         return null;
     }
+
+    public AActor SpawnActor(UClass? clazz, FVector? location, FRotator? rotation, FActorSpawnParameters spawnParameters)
+    {
+        var transform = new FTransform();
+        
+        if (location != null)
+        {
+            transform.Location = location;
+        }
+
+        if (rotation != null)
+        {
+            // TODO: FQuat
+            // transform.Rotation = 
+        }
+
+        return SpawnActor(clazz, transform, spawnParameters);
+    }
+
+    public AActor SpawnActor(UClass? clazz, FTransform userTransform, FActorSpawnParameters spawnParameters)
+    {
+        if (clazz == null)
+        {
+            Logger.Warning("SpawnActor failed because no class was specified");
+            return null;
+        }
+        
+        // TODO: Bunch of if checks
+        var levelToSpawnIn = spawnParameters.OverrideLevel;
+        if (levelToSpawnIn == null)
+        {
+            // Spawn in the same level as the owner if we have one.
+            levelToSpawnIn = (spawnParameters.Owner != null) ? spawnParameters.Owner.GetLevel() : _currentLevel;
+        }
+
+        var newActorName = spawnParameters.Name;
+        var template = spawnParameters.Template;
+
+        if (template == null)
+        {
+            // template = clazz.GetDefaultObject();
+        }
+        
+        return null;
+    }
+
+    public T SpawnActor<T>(UClass? clazz, FActorSpawnParameters spawnParameters) where T : AActor
+    {
+        return (T)SpawnActor(clazz, null, null, spawnParameters);
+    }
 }

src/Prospect.Unreal/Runtime/UWorld.cs

@@ -1,5 +1,6 @@
 using Prospect.Unreal.Core;
 using Prospect.Unreal.Core.Names;
+using Prospect.Unreal.Core.Objects;
 using Prospect.Unreal.Exceptions;
 using Prospect.Unreal.Net;
 using Prospect.Unreal.Net.Actors;
@@ -16,8 +17,18 @@ public abstract partial class UWorld : FNetworkNotify, IAsyncDisposable
 
     private UGameInstance? _owningGameInstance;
     private AGameModeBase? _authorityGameMode;
+    
+    /// <summary>
+    ///     Array of levels currently in this world. Not serialized to disk to avoid hard references.
+    /// </summary>
     private List<ULevel> _levels;
     
+    /// <summary>
+    ///     Pointer to the current level being edited.
+    ///     Level has to be in the Levels array and == PersistentLevel in the game.
+    /// </summary>
+    private ULevel? _currentLevel;
+
     public UWorld()
     {
         _owningGameInstance = null;
@@ -40,6 +51,11 @@ public abstract partial class UWorld : FNetworkNotify, IAsyncDisposable
     /// </summary>
     public bool bActorsInitialized { get; private set; }
     
+    /// <summary>
+    ///     Is the world in its actor initialization phase.
+    /// </summary>
+    public bool bStartup { get; private set; }
+    
     /// <summary>
     ///     Whether BeginPlay has been called on actors
     /// </summary>
@@ -149,9 +165,9 @@ public abstract partial class UWorld : FNetworkNotify, IAsyncDisposable
         if (!AreActorsInitialized())
         {
             // Initialize network actors and start execution.
-            for (int i = 0; i < _levels.Count; i++)
+            foreach (var level in _levels)
             {
-                _levels[i].InitializeNetworkActors();
+                level.InitializeNetworkActors();
             }
 
             // Enable actor script calls.

src/Prospect.Unreal/Serialization/FNetBitWriter.cs

@@ -1,5 +1,6 @@
 using Prospect.Unreal.Core;
 using Prospect.Unreal.Core.Names;
+using Prospect.Unreal.Core.Objects;
 using Prospect.Unreal.Net;
 
 namespace Prospect.Unreal.Serialization;