From 3870982f640260822bf605e693782ce9f5d79cf6 Mon Sep 17 00:00:00 2001
From: Joel Stålnacke <joel@saker.fi>
Date: Fri, 20 Mar 2026 21:38:46 +0200
Subject: Get a player drawing on screen

---
 Djup.Native/src/LibDjup.cs | 10 +++++-----
 Djup.Native/src/Types.cs   | 27 +++++++++++----------------
 2 files changed, 16 insertions(+), 21 deletions(-)

(limited to 'Djup.Native/src')

diff --git a/Djup.Native/src/LibDjup.cs b/Djup.Native/src/LibDjup.cs
index 15dcdad..4cd99f8 100644
--- a/Djup.Native/src/LibDjup.cs
+++ b/Djup.Native/src/LibDjup.cs
@@ -26,13 +26,13 @@ public static partial class LibDjup
     public static partial float vec2_length(Vec2 v);
 
     [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(log_set_output))]
-    public static partial Vec2 log_set_output([MarshalAs(UnmanagedType.FunctionPtr)] LoggerDelegate logger);
+    public static partial void log_set_output([MarshalAs(UnmanagedType.FunctionPtr)] LoggerDelegate logger);
 
     [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(log_set_level))]
-    public static partial Vec2 log_set_level(LogLevel minLevel);
+    public static partial void log_set_level(LogLevel minLevel);
 
     [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(physics_context_create))]
-    public static partial IntPtr physics_context_create(uint snapshots);
+    public static partial IntPtr physics_context_create(int snapshots, int players, int balls);
 
     [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(physics_context_free))]
     public static partial void physics_context_free(IntPtr context);
@@ -47,8 +47,8 @@ public static partial class LibDjup
     public static partial int physics_tick(IntPtr currentSnapshot, double delta, IntPtr nextSnapshot);
 
     [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(snapshot_put_player))]
-    public static unsafe partial int snapshot_put_player(IntPtr snapshot, uint playerId, Player *player);
+    public static unsafe partial int snapshot_put_player(IntPtr snapshot, int playerId, Player* player);
 
     [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(snapshot_set_player_input))]
-    public static partial int snapshot_set_player_input(IntPtr snapshot, uint playerId, byte input);
+    public static partial int snapshot_set_player_input(IntPtr snapshot, int playerId, byte input);
 }
diff --git a/Djup.Native/src/Types.cs b/Djup.Native/src/Types.cs
index 7d9c41e..3afce83 100644
--- a/Djup.Native/src/Types.cs
+++ b/Djup.Native/src/Types.cs
@@ -1,5 +1,4 @@
 using System.Diagnostics;
-using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 namespace Djup.Native;
@@ -56,24 +55,20 @@ public struct Bullet
 }
 
 [StructLayout(LayoutKind.Sequential)]
-public struct Snapshot
+public unsafe struct Snapshot
 {
-    [InlineArray(Constants.WorldMaxPlayers)]
-    public struct PlayerArray
-    {
-        private Player _element0;
-    }
-
-    [InlineArray(Constants.WorldMaxBullets)]
-    public struct BallArray
-    {
-        private Bullet _element0;
-    }
-
     private byte active;
     public uint Tick { get; }
-    public PlayerArray Players { get; }
-    public BallArray Bullets { get; }
+    private int playersLength;
+    private Player* players;
+    private int bulletsLength;
+    private Bullet* bullets;
+
+    public ReadOnlySpan<Player> Players =>
+        new ReadOnlySpan<Player>(players, playersLength);
+
+    public ReadOnlySpan<Bullet> Bullets =>
+        new ReadOnlySpan<Bullet>(bullets, bulletsLength);
 }
 
 public enum LogLevel
-- 
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